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東北大学 研究者紹介 TOHOKU UNIVERSITY Researchers 東北大学 研究者紹介 --> Details of the Researcher 検索結果一覧に戻る --> Home 日本語 English   TOHOKU UNIVERSITY Researchers Menu Japanese Page TOHOKU University Web Top Page Summary ◆ Profile ◆ Research History ◆ Education ◆ Committee Memberships ◆ Professional Memberships Research Activities ◆ Research Interests ◆ Research Areas ◆ Awards ◆ Papers ◆ Misc. ◆ Books and Other Publications ◆ Presentations ◆ Industrial Property Rights ◆ Research Projects Educational Activities ◆ Teaching Experience Contributions ◆ Social Activities ◆ Media Coverage ◆ Academic Activities Other ◆ Other × ​ Summary Profile Research History Education Committee Memberships Professional Memberships ​ Research Activities Research Interests Research Areas Awards Papers Misc. Books and Other Publications Presentations Industrial Property Rights Research Projects ​ Educational Activities Teaching Experience ​ Contributions Social Activities Media Coverage Academic Activities ​ Other Other Toshihiko Nakata Section Graduate School of Engineering Job title Professor Degree 博士（工学）（東北大学） researchmap https://researchmap.jp/tnakata1 J-GLOBAL ID 201801009174708784 Researcher ID E-3161-2010 Profile Researcher, educator, and social entrepreneur.Emphasis on collaboration across business, government, education, and community.Specializes in data-driven designing for a zero-carbon society. Toshihiko Nakata has been a full-time professor at the Graduate School of Engineering, Tohoku University since April 2006. He originally began work at Tohoku University in September 1993 as an associate professor. He was a Fulbright Scholar at Lawrence Livermore National Laboratory, USA, between 1997 and 1998 and was also a senior researcher at the Central Research Institute of Electric Power Industry, Japan, between 1985 and 1993.  He has received the “Best Paper Award” from the American Society of Mechanical Engineers in 2000; the Japan Society of Mechanical Engineers "JSME Medal for Distinguished Engineers" in 2024, the "Academic Award" and the ”Best Paper Awards" from the Japan Institute of Energy in 2005, 2017 and 2021, the “Academic Award” from the Combustion Society of Japan in 1993; and the “President’s Award” from the Central Research Institute of Electric Power Industry, Japan, in 1991. He also serves on the board of the Reconstruction Promotion Committee of Japan by appointment of the Prime Minister. Japan Energy Databasehttps://energy-sustainability.jp Research History 8 2006/04 - Present Tohoku University　Graduate School of Engineering, Department of Management Science and Technology　Professor 1993/09 - 2006/03 Tohoku University　Graduate School of Engineering, Department of Management Science and Technology　Associate Professor 1997/07 - 1998/07 Lawrence Livermore National Laboratory, USA　Energy Directorate　Fulbright Scholar 1985/04 - 1993/08 Central Research Institute of Electric Power Industry　Researcher in 1985-1992, Senior Researcher in 1992-1993 2021/04 - 2022/03 Tohoku University　Graduate School of Engineering, Department of Management Science and Technology　Department Chair 2016/04 - 2017/03 Tohoku University　Graduate School of Engineering, Department of Management Science and Technology　Department Chair 2012/04 - 2013/03 Tohoku University　Graduate School of Engineering, Department of Management Science and Technology　Department Chair 2009/04 - 2010/03 Tohoku University　Graduate School of Engineering, Department of Management Science and Technology　Department Chair Show all Show first 5 Education 2 Tohoku University　Graduate School of Engineering　Department of Mechanical Engineering, Master course 1983/04 - 1985/03 Tohoku University　Faculty of Engineering　Department of Mechanical Engineering 1979/04 - 1983/03 Committee Memberships 184 Ministry of Economy, Trade and Industry　Member of energy statistics committee 2016/11 - Present The Japan Society of Mechanical Engineers　The 60th President of Tohoku Branch 2024/04 - 2025/03 Miyako City Decarbonized Community Development Council　Chairman 2023/04 - 2025/03 Fukushima Prefecture　Director, Centre for Environmental Creation 2016/07 - 2025/03 Socoety of Automotive Engineers of Japan　Recycle Technology committee chairman 2018/04 - 2024/03 Sendai city　Chair, Environment audit committee 2014/08 - 2024/02 Woody Biomass Energy Association, Forestry Agency　Support Committee Member, Ecosystem Technology Development Support Project in the Region 2020/04 - Present Yamagata prefecture　Yamagata Prefecture Waste Treatment Facility Technical Review Meeting 2019/04 - Present 4th Generation District Heat Supply Forum (4DH Forum)　Chairman 2018 - Present Fulbright Almuni in Tohoku　Chair 2016/07 - Present Miyako city, Iwate prefecture　Chair, Smart community promotion board 2013/07 - Present Rokkasho Village Global Warming Prevention Committee　Committee chairman 2023/10 - 2026/10 The Japan Society of Energy and Resources　Delegates for the 8th term 2023/06 - 2025/06 The Japan Society of Mechanical Engineers　Tohoku Branch 60th Commercial Councilor 2024/04 - 2025/03 Miyagi Prefecture Independent Administrative Institution Employment Support Organization for the Elderly, Persons with Disabilities and Job Seekers Management Council　Chairperson of the Tohoku Polytechnic College Subcommittee 2021/06 - 2025/03 Fukushima city, Fukushima prefecture　Chair, Environmental Council 2015/04 - 2025/03 Nakadomari town, Aomori prefecture　Chair of the Committee for the Development of a Strategy for the Introduction of Renewable Energies for the Realization of Regional Decarbonization 2023/08 - 2024/03 Okuma Town, Fukushima Prefecture　Zero Carbon Vision Expert Meeting, chairman 2021/11 - 2024/03 Aomori Prefecture　Member of energy strategic planning committee 2016/06 - 2024/03 Miyagi Environmental Life Out-reach Network （MELON）　Councilor 2019/08 - 2023/08 The Japan Society of Energy and Resources　Delegates for the 7th term 2021/06 - 2023/06 Miyako City Renewable Energy Promotion Council　Chairman 2021/06 - 2023/06 The Japan Society of Mechanical Engineers　Representative members for 2022 (100th term) 2022/04 - 2023/03 The Institute of Energy Economics, Japan　Chair, Design for energy systems design for regional society 2020/09 - 2023/03 Iwate Prefecture　Experts committee member, Environmetal Council 2020/04 - 2023/03 Mitami town, Yamagata prefecture　member, climate change action council 2017/04 - 2023/03 The Tohoku Chamber of Environment, NPO　Chair, Michinoku Audit and Certification Organization for Environment and Quality 2015/05 - 2023/03 Miyagi prefecture　Board member of climate change action in Miyagi 2007/05 - 2023/03 Miyagi Prefectural Assembly　Witness, Special Committee on Renewable Energy and Decarbonization Research 2022/04 - 2022/04 Namie Machi, Fukushima Prefecture　Review committee member for proposals for the establishment of a new regional energy company 2021/07 - 2022/03 The Japan Society of Mechanical Engineers　Member of the organizing committee 2018/04 - 2022/03 Fukushima Prefecture　Reviewing board memer of an innovation coast project, energy directory 2017/04 - 2022/03 Okuma Town, Fukushima Prefecture　Zero Carbon Vision Expert Meeting, Chairman 2020/04 - 2021/03 The Japan Society of Mechanical Engineers　Tiohoku Branch 55th Commercial Councilor 2020/04 - 2021/03 New Energy and Industrial Technology Development Organization　Biomass energy introductiion and implementatiion with technological guidelines 2020/04 - 2021/03 Japan Soeicty of Mechanical Engineers　Committee member in the 98th stage, Technology Roadmap Committee 2020/04 - 2021/03 Japan Society of Mechanical Engineers　Representative member in 98th stage 2020/04 - 2021/03 Hirosaki city　Member of advisory board on distributed energy infrastructure 2014/04 - 2021/03 Smart city committee　Member 2013/04 - 2021/03 Reconstruction Agency　Member, Reconstruction Promotion Committee 2013/03 - 2021/03 Japan Science and Technology Agency　Member of strategic energy management committee 2018/11 - 2020/05 Miyagi COOP　Member, Environment audit committee 2010/11 - 2020/05 Japan Society of Mechanical Engineers　Committee member in the 97th stage, Technology Roadmap Committee 2019/04 - 2020/03 The Japan Socoety of Mechanical Engineers　Depty Director, Technology and Society Division 2019/04 - 2020/03 Japan Society of Mechanical Engineers　Representative member of 97th stage 2019/04 - 2020/03 Japan Society of Mechanical Engineers　Board member of 55th stage committee, Tohoku branch 2019/04 - 2020/03 Japan Society of Energy and Resources　Reprenrtative member of 6th stage 2019/04 - 2020/03 Japan Society of Mechanical Engineers　Committee member in the 96th stage, Technology Roadmap Committee 2018/04 - 2019/03 Japan Society of Energy and Resources　5th representative member 2018/04 - 2019/03 Yamagata prefecture　Member, Waste management reviewing board 2017/04 - 2019/03 Japan-U.S. Educational Commission (Fulbright Japan)　Selection Committee Members 2017/04 - 2018/03 Japan Society of Energy and Resources　Representative member of 4th stage 2017/04 - 2018/03 The Japan Society of Mechanical Engineers　Committee member in the 95th stage, Technology Roadmap Committee 2017/04 - 2018/03 The Japan Institute of Energy　Chairman for Annual Conference of Biomass Science 2017/01 - 2018/03 Society of Automotive Engineers of Japan　Member, Recycle Technology Committee 2008/04 - 2018/03 Japan Society of Energy and Resources　Representative in the third stage 2016/06 - 2017/05 Yamagate Prefecture　Lecture, Regional energy strategy 2017/03 - 2017/03 Fukushima prefecture　Member, Innovation coast projects planning committee 2016/11 - 2017/03 Sagae city, Yamagata Prefecture　Chair. Biomass resources planning committee in West Murayama region 2016/10 - 2017/03 Rokkasho village, Aomori prefecture　Chair, Renewable energy promotion committee 2016/09 - 2017/03 Miyami town, Yamagata prefecture　Chair, Renewable energy planning committee 2016/07 - 2017/03 Miyagi prefecture　Advisor, Renewable energy promotion 2016/07 - 2017/03 Fukushima prefecture　Member, prctical implementation and promotion committee 2016/04 - 2017/03 The Japan Society of Mechanical Engineers　Representative in the 93rd stage in the Tohoku branch 2016/04 - 2017/03 Japan Society of Mechanical Engineers　Chairman, Annual 52th conference in Tohoku 2016/04 - 2017/03 The Japan Society of Mechanical Engineers　Committee member in the 94th stage, Technology Roadmap Committee 2016/04 - 2017/03 Japan Society of Energy and Resources　Representative member in 3rd stage 2016/04 - 2017/03 Japan Society of Mechanical Engineers　Member of 52th managing board of Tohoku region 2016/04 - 2017/03 Fukushima prefecture　Reviewing committee on renewable energy development 2013/10 - 2017/03 Yamagata prefecture　member, Waste management reviewing board 2012/04 - 2017/03 Japan Science and Technology Agency　Member, Visions for the future energy and society 2016/10 - 2016/11 Japan Society of Energy and Resources　Representative in the 2nd stage 2015/06 - 2016/05 Japan Society of Mechanical Engineers　Member, Technology award comittee in Tohoku 2015/11 - 2016/03 Ministry of Economy, Trade and Industry　Member, Sustainbale biomass power generation committee 2015/09 - 2016/03 HIrosaki city　Member, regional energy management committee 2015/04 - 2016/03 Hirosaki city, Aomori prefecture　Advisor, distributed enertgy infrastructure implementation 2015/04 - 2016/03 Ministry of te Environment　Member, Renewable energy promotion toward low carbon society 2015/04 - 2016/03 Miyagi climate change actions　Advisor, Eco driving project in 2015 2015/04 - 2016/03 Japan Society of Mechanical Engineers　Committee member in the 93th stage, Technology Roadmap Committee 2015/04 - 2016/03 Japan Society of Mechanical Engineers　member of 93th managing board of Tohoku 2015/04 - 2016/03 Japan Society of Mechanical Engineers　Member of paper reviewing committee of ICOPE-15 2014/12 - 2016/03 Japan Society of Mechanical Engineers　Member of organizing committee of ICOPE-15 2014/03 - 2016/03 Iwate prefecture　Supporter, Iwate reconstruction and promotion seminar 2013/10 - 2016/03 MInistry of the Environment　Member, Renewable energy and distributed energy promotion toward 2050 committee 2013/07 - 2016/03 Ministry of the Environment　Member, Reviewing committee of Green new deal subsidy 2013/05 - 2016/03 Fukushima prefecture　Advisor, renewable enrgy technologies 2013/04 - 2016/03 Hirosaki city, Aomori prefecture　Lecture, smart city academy 2013/04 - 2016/03 Clean Technologies and Environmental Policy, Springer　Editorial board member 2013/04 - 2016/03 Miyagi preferture　Member, council for renewable energy and nergy savings 2003/12 - 2016/03 Japan Spcoety for the Promotion of Science　Reviewing committee member 2014/08 - 2015/07 Japan Society of Energy and Resources　Representative in the first stage 2014/06 - 2015/05 Sendai city　Vice chairman, Michinoku Audit and Certification Organization for Environment and Quality 2003/12 - 2015/05 Japan Society of Mechanical Engineers　Committee member in the 92th stage, Technology Roadmap Committee 2014/04 - 2015/03 Engineering Advancement Association of Japan　Vice chairman, Revovery and reconstruction comittee 2013/05 - 2015/03 Ministry of the Environment　Member, renebwal energy promotion toward 2050 committee 2013/04 - 2015/03 National Institute of Advanced Industrial Science and Technology （AIST）　Member, Reviewing committe in energy directory 2012/08 - 2015/03 Miyagi climate change actions　Advisor, Green curtain project 2011/04 - 2015/03 Japan Society of Mechanical Engineers　Committee chair, Energy system design toward low carbon society 2013/04 - 2015/02 Yamagate Regional Waste Management Association　Member, Environment Impact assessment committee 2014/11 - 2015/01 Sendai city　Unsworn witness, energy policy committee of city council 2014/10 - 2014/10 Sendai city　Member, environmental auditing committee 2013/08 - 2014/07 Miyagi prefecture　unsworn witness, renewable energy policy committee of prefecture council 2014/05 - 2014/05 Ministry of the Environment　Lecture, Eco action program for CI2 reduction 2014/05 - 2014/05 Japan Society of Energy and Resources　Representative in the second stage 2013/06 - 2014/05 Ministry of Land, Infrastructure, Transport and Tourism　Member, renewable energy promotion and implemengation comittee 2013/11 - 2014/03 Hirosaki city, Aomori prefecture　Chairman, Smart city feasibility study comittee 2013/09 - 2014/03 Japan Society of Mechanical Enginerrs　Technology roadmap committee member in the 91st stage 2013/04 - 2014/03 Japan Society of Mechancal Engineers　Academic committee of ICOPE-13 2012/12 - 2014/03 National Institute of Advanced Industrial Science and Technology （AIST）　Member, Reviwing board of biomass refinery center 2012/08 - 2014/03 The Institute of Electrical Engineers of Japan　Chair, Research committee on a resilient energy system 2012/04 - 2014/03 Yamagate Regional Waste Management Association　Member, Environment impact assessment committee 2013/10 - 2013/11 Misato town　Lecture, sustainable energy study 2013/08 - 2013/08 Ministry of the Environment　Lecture, Green Nw Deal policy 2013/08 - 2013/08 National associate of towns and villages　Lecture, Fukushima prefecture mayors 2013/08 - 2013/08 Mogami town, Yamagata Prefecture　Chairman, smart community planning committee 2012/10 - 2013/03 Hirosaki city　Memberm smart city olanning committee 2012/08 - 2013/03 Miyako city　Advisor, smart community implementation 2012/04 - 2013/03 Yamoto town　Advisor, smart community implementation 2012/04 - 2013/03 The Japan Society of Mechanical Engineers, Technology Roadmap Committee　Committee member in the 90th stage 2012/04 - 2013/03 Ministry of Economy, Trade and Industry　Chairman, Renewable energy promotion in Tohoku region 2010/07 - 2013/03 Japan Society of Mechanical Engineers　Chair, Committee on an energy system design toward low carbon society 2010/04 - 2013/03 Sendai city　Lecture, Excecutive office training 2012/07 - 2012/07 Japan Society for the Promotion of Sciences　Reviewing committee member 2010/08 - 2012/07 Ministry of the Environment　Member, Greem New Deal reviewing board 2012/03 - 2012/06 Japan Society of Energy and Resources　Planning and academic member 2005/06 - 2012/06 Japan Society of Enertgy nd Resources　Representative member 2009/06 - 2012/05 Japan Society of Mechanical Engineers　Representative member of 89th stage 2011/04 - 2012/03 The Japan Society of Mechanical Engineers　Technology Roadmap Committee member in the 89th stage 2011/04 - 2012/03 Japan Society of Mechanical Engineers　Member, technology roadmap committee of 89th stage 2011/04 - 2012/03 National Institute of Advanced Industrial Science and Technology （AIST）　Member, Reviewing board in biomass directory 2010/11 - 2012/03 National Institute of Advanced Industrial Science and Technology （AIST）　Reviewing board member in biomass research 2010/10 - 2012/03 Gas Turbine Society of Japan　Member of the paper committee of IGTC 2011 2010/06 - 2012/03 The Institute of Electrical Engineers of Japan　Chair of the special committee in low carbon energy system technologies 2009/04 - 2012/03 Ministry of the Environment　Member, regional activation committee 2012/01 - 2012/01 Tome city　Member, renewable eergy promotion committee 2010/07 - 2011/03 Japan Society of Mechanical Engineers　Board member of 88th stage 2010/04 - 2011/03 Japan Society of Mechanical Engineers　Technology roadmap committee member of 88th stage 2010/04 - 2011/03 The Japan Society of Mechanical Engineers　Manager for accounting of 45th Tohoku branch 2009/04 - 2011/03 Japan Society of Mechanical Engineers　Member, Journal paper reviewing committee 2006/04 - 2011/03 Japan Society of Energy and Resources　Manager for summer workshop in 2010 2010/05 - 2010/09 Tome city　Member, Renewable energy vision comittee 2009/07 - 2010/03 Japan Society of Mechanical Engineers　Member, managing board in 45th stage of Tohoku branch 2009/04 - 2010/03 Japan Society of Mechanical Engineers　Member of Paper reviewing committee of ICOPE 2009/04 - 2010/03 Japan Society of Mechanical Engineers　Member of annual conference committee in 2009 2008/04 - 2010/03 Gas Turbine Society of Japan　Council member 2004/03 - 2010/03 Miyago center for climate change actions　Reviewing member for eco action contest 2008/07 - 2009/10 Zero emission Miyagi　Chairman, reviewing board 2005/06 - 2009/07 Taiwa town　Chairman, Eco factory proposal reviewing board 2005/06 - 2009/07 New Energy and Industrial Technology Development Organization　Member, clean coal technoilogy committee 2008/10 - 2009/03 Tohoku Regional Advancement Center　Memeber, environmental conscious design of manufacring industries in Tohoku 2008/07 - 2009/03 Miyagi prefecture　Member, poposal reviewing committee 2008/07 - 2009/03 Japan Society of Mechanical Engineers　Member, managing board of Tohoku branch in 44th stage 2008/04 - 2009/03 Japan Society of Mechanical Engineers　Member, organizing board of energy and power 2008/04 - 2009/03 Japan Society of Mechanical Engineers　Member, Planning comittee in energy and power division 2008/04 - 2009/03 New Energy and Industrial Technology Development Organization　Memebr,reviewing board of biomass heat utilization 2006/06 - 2009/03 Institute of Electrical Engineers of Japan　Member of technical comittee of an energy demand/supply system 2006/04 - 2009/03 Japan Society fo the Promotion of Science　Reviewing committee member for Grant-in-Aid for Scientific Research 2007/01 - 2008/12 Miiyagi prefecture　Member, ESCO planning committee for a cancer center 2007/09 - 2008/03 Forestrt Agency　Member, woody biomass for fuel utilization committee 2007/08 - 2008/03 Japan Society of Mechanical Engineers　Topics member for transactions 2007/04 - 2008/03 Rokkasho village　Vice-chairman, Renewable energy vision committee 2007/07 - 2008/02 Senday city　Chairman, Michinoku EMS planning committee 2006/07 - 2007/03 Japan Society of Mechanical Engineers　Member, paper reviewing board 2006/04 - 2007/03 Ministry of Economy, Trade and Industry　Member, electricity and gas technology committee 2005/11 - 2007/03 New Energy and Industrial Technology Development Organization　Chairman, technology development in energy industries 2004/10 - 2007/03 Japan Society of Mechanical Engineers　Member, paper reviewing board 2005/04 - 2006/03 Miyagi prefecture　Member, Circulation economy comittee 2004/10 - 2006/03 Miyagi prefecture　Member, Energy saving vision committee 2004/09 - 2005/03 Ministry of Agriculture, Forestry and Fisheries of Japan〔　Member, Methane fermentaion and utilization committee 2004/07 - 2005/03 Japan Society of Mechanical Engineers　Member, annual record committee in thermal engineering division 2004/04 - 2005/03 Japan Society of Mechanical Engineers　Member, paper reviewing board in 82th stage 2004/04 - 2005/03 Japan Society of Mechanical Engineers　Member, academic paper reviewing in 82th stage 2004/04 - 2005/03 Yokote city　Member, biomass business committee 2004/01 - 2005/03 Miyagi prefecture　Vice-chairman, Food waste recycle promotion committee 2003/07 - 2004/03 Japan Society of Mechanical Engineers　Board member of energy and power division 2000/04 - 2004/03 Japan Society of Mechanical Engineers　Member of 76th annual conference 1998/04 - 1999/03 Lawrence Livermore National Laboratory, USA　Fulbright Scholar 1997/07 - 1998/07 Japan Society of Mechanical Engineers　Member of 74th paper reviewing committee 1996/04 - 1997/03 Japan Society of Mechanical Engineers　Member of 73th paper reviewing committee 1995/04 - 1996/03 4th ASME/JSME Thermal Engineering Joint Conference　Member of transaction papers 1994/01 - 1995/03 Combustion society of Japan　Committee member of 32th combustion symposium 1994/03 - 1994/12 Japan Society of Mechanical Engineers　Research commitee member og P-SC214 1991/10 - 1994/09 Japan Society of Mechanical Engineers　Committee member of 29th annual conference in Tohoku branch 1993/10 - 1994/03 Tokyo Metropolitan Government　Cmmittee member, NOx reduction by energy savings 1993/04 - 1994/03 Show all ︎Show first 5 Professional Memberships 9 Society of Automotive Engineers of Japan 2010/04 - Present International Association for Energy Economics 1998 - Present Japan Society of Energy and Resources 1990/04 - Present Japan Institute of Energy 1990/04 - Present Japan Society of Mechanical Engineers 1981/04 - Present Japan District Heating & Cooling Association 2018/04 - 2022/03 The Japan Forest Engineering Society 2019/04 - 2021/03 Gas Turbine Society of Japan 1990/04 - 2016/03 The Institute of Electrical Engineers of Japan 2000/04 - 2015/03 ︎Show all ︎Show first 5 Research Interests 1 Theory and practice of energy design to drive decarbonization Research Areas 4 Energy / Earth resource engineering, energy science / Analysis I for regional energy statistics Energy / Earth resource engineering, energy science / Carbon neutral design Environmental science/Agricultural science / Environmental policy and society / Environmental Preservation Social infrastructure (civil Engineering, architecture, disaster prevention) / Social systems engineering / Awards 21 JSME Medal for Distinguished Engineers 2024/03　The Japan Society of Mechanical Engineers　Implementation of the Japan Energy Database in the design of a decarbonised society Society Award, Academic Division 2021/02　Japan Institute of Energy　Integrated design and analysis for sustainable regional energy systems Treatise Award 2017/08　Japan Institute of Energy　Integrated Assessment of Biomass Energy Systems Considering Effective Utilization of Resources Contribution Award 2015/08　Society of Automotive Engineers of Japan　Contribution to recycle technology committee Treatise Award 2005/08　Japan Institute of Energy　Design of Energy System Introducing Biomass Resources for a Rural Area Fulbright Scholar 1997/07　The Bureau of Educational and Cultural Affairs of the U.S. Department of State Graduate Research Encouragement Award 2024/03　Society of Automotive Engineers of Japan　Spatio-temporal charging demand analysis of electric vehicles using mobile location data Honorable Mention 2022/12　Japan Institute of Energy　Development of a method for estimating wood biomass potential by municipality using forest registers Graduate Research Encouragement Award 2022/03　Society of Automotive Engineers of Japan　Spatio-Temporal Analysis of V2G Deployment Potential Using Mobile Location Data 6th best students presentation award 2018/06　Japan Society of Energy and Resources　The impacts of of of introducing shared vehicles on regional energy system introducing shared vehicles on regional energy system Prize for research encouragement for graduate students 2018/03　Society of Automotive Engineers of Japan　Analysis of Energy and Carbon Savings from Vehicle Recycling Outstanding Contribution in Reviewing, Energy 2014/12　ELSEVIER Best Student Presentation Award 2014/06　Japan Socity of Energy and Resources　Design for a low remperature district heating system based on exergy index Best Student Presentation Award 2014/06　Japan Society of Energy and Resources　Design for a districh heating system using biomass resources considering regional resource distribution Poster Award 2014/01　Japan Institute of Energy　Design for a suatainbale energy energy system using woody biomass based on spatial information analysis Outstanding Contribution in Reviewing, Applied Energy 2013/12　ELSEVIER Best Student Paper Award 2009/06　IAEE, Inernational Association for Energy Economics　Optimization of decentralized energy systems using biomass resources for rural electrification in developing countries Poster Award 2006/01　Japan Institute of Energy　Economic assessment for woody biomass powr generation considering regional resource distribution Best Paper Award 2000/05　ASME/IGTI　A Study of Combustion Characteristics of Gasified Coal Fuel Technology Award 1993/11　Combustion Society of Japan　Development of low NOx 1300 C class gas turbine combustion for IGCC President Award 1991/11　Central Research Institute of Electric Power Industry　Development of 1300C Class low NOx gas tuebine combustor for IGCC Show all ︎Show 5 Papers 294 The role of regional renewable energy integration in electricity decarbonization—A case study of Japan International-journal International-coauthorship Peer-reviewed Hiroaki Onodera, Rémi Delage, Toshihiko Nakata Applied Energy　363　(123118)　1-13　2024/06/01 Publisher: Elsevier BV DOI： 10.1016/j.apenergy.2024.123118 　 ISSN：0306-2619 More details Close Decarbonization strategies depend critically on the integration of region-specific renewable energy and social acceptance, yet their roles still need to be clarified. This study designs a regional-integrated electricity system and assesses the impact of regional decisions associated with renewable energy on cost-effective national decarbonization, using Japan as a case study owing to its active engagement in regional decarbonization. A high spatial resolution renewable electricity system model that explicitly considers all 1741 Japanese municipalities and employs a hierarchical optimization approach is developed. Based on the model, the opportunity cost of limiting renewable energy development is quantified for 30 representative municipalities. The results highlight that restrictions on municipal renewable energy can increase annual system costs by hundreds of millions of euros and national electricity costs by up to 0.4%, although it varies by region and energy source. This suggests that widespread opposition to renewables could be a significant barrier to cost-effective decarbonization. However, the impact of solar photovoltaic (PV) tends to be slight. In conclusion, investments in social acceptance of region-specific renewables can minimize opportunity losses and reduce system costs. Nonetheless, relocating the project to another region is possibly more cost-effective for solar PV. Machine learning application for estimating electricity demand by municipality International-coauthorship Peer-reviewed Yoshiki Kusumoto, Rémi Delage, Toshihiko Nakata Energy　296　(131138)　1-10　2024/06/01 Publisher: Elsevier DOI： 10.1016/j.energy.2024.131138 　 More details Close In order to achieve efficient and low carbon energy systems, attention has been focused on locally distributed energy systems, but a detailed and accurate supply-demand database is essential for simulating and optimizing such local systems. Demand data are generally not maintained at small scales, and it is common to estimate electricity demand by prorating global data from large energy carriers. However, the accuracy of the proration method is questionable. The present study explores the idea of using machine learning as an alternative to the proration method for downscaling electricity demand data based on a neural network model. The input data consist of four categories: weekday/holiday determination data, temperature data, periodic signal data, and demand sector configuration data. The model shows a satisfying generalization capacity for downscaling data from regional to prefectural and municipal scales while capturing local characteristics that are not accounted with the proration method. A bottom-up estimation of woody biomass energy potential including forest growth in Japan International-journal International-coauthorship Peer-reviewed Ryoga Ono, Rémi Delage, Toshihiko Nakata Renewable Energy　120677-120677　2024/05/23 Publisher: Elsevier BV DOI： 10.1016/j.renene.2024.120677 　 ISSN：0960-1481 More details Close Until now, top-down estimation using the areal weighting interpolation method was applied to estimate the woody biomass energy potential for each of the 1,741 municipalities in Japan. However, it was difficult to utilize the uncertain results in policy making. In contrast, bottom-up estimation can reflect the regional characteristics and provide novel benefits to policymakers. In this study, bottom-up estimation using the method of aggregation approach was carried out from the geospatial data for artificial forests, excluding protected forest, and considering forest growth. The data was collected from both national and each prefecture government. The forest growth of each forest division was adjusted by curve fitting and compared with statistical values to verify the estimation results. The woody biomass energy potential was defined as the amount of unused wood generated from harvesting to produce materials. In Japan, the total potential was 0.26 − 0.74 [EJ/year]. Comparing with the top-down estimation, these results were 34% overestimated for the maximum value and 54% underestimated for the minimum value. The detail results of geospatial distribution were statistically analyzed. Moran&＃39;s I statistic was 0.68, and a hierarchical clustering with proportion resulted in the largest distribution with the majority of Japanese Ceder. Design of a regional energy system based mainly on green power Invited Toshihiko Nakata Journal of Japan Energy Association　74　(302)　19-29　2024/05/15 Publisher: Japan Energy Association Nonlinear optimization of biomass fueled combined heat and power boilers in district heating systems in Japan International-journal International-coauthorship Peer-reviewed Régis Delubac, Rémi Delage, Toshihiko Nakata Clean Technologies and Environmental Policy　1-15　2024/02/09 Publisher: Springer Science and Business Media LLC DOI： 10.1007/s10098-024-02746-w 　 ISSN：1618-954X eISSN：1618-9558 More details Close to be integrated technologically and economically in existing systems is essential. Most of the recent studies are focusing on large scale energy systems which require lot of assumptions such as linear approximations. This paper presents the economical optimization of combined thermal and electrical supply of multiple cities in Japan through utilization of combined heat and power boilers. A nonlinear approach is used to consider phenomena including combustion efficiencies variations or effect of scale. Different technologies of combined heat and power are modeled with different properties and fuels such as household wastes and multiple biomass woods. The cost is used as the objective function to minimize considering current energy costs. With each boiler modeled and sized, optimization results show an optimal operation of 100% renewable resources, especially biomass power with accurate indicators on the operating mode of those technologies. Decarbonized city planning in the context of the local community Toshihiko Nakata Gakushikai Kaiho　964　67-71　2024/01 Publisher: gakushikai Directed recurrence networks International-journal International-coauthorship Peer-reviewed Rémi Delage, Toshihiko Nakata Chaos: An Interdisciplinary Journal of Nonlinear Science　33　(11)　1-8　2023/11/01 Publisher: AIP Publishing DOI： 10.1063/5.0173394 　 ISSN：1054-1500 eISSN：1089-7682 More details Close Complex network approaches have attracted a growing interest in the analysis of nonlinear time series. Among other reconstruction methods, it has been shown that the recurrence plot can be used as the adjacency matrix for recurrence networks, expanding the applications of the already successful recurrence analysis. We study here the potential benefits of a directed formulation of recurrence networks through a simple modification of the recurrence plot. As it is directly related to the recurrence analysis field, this approach takes advantage of the progresses regarding the creation and treatment of the recurrence plot. It appears that directed recurrence networks provide more robust results than their undirected counterpart for transitions detection as well as temporal patterns discovery and clustering. New applications for network cleaning and data modeling are also demonstrated. Cluster Analysis of Energy Consumption Mix in the Japanese Residential Sector International-coauthorship Peer-reviewed Rémi Delage, Toshihiko Nakata Smart Energy　12　(100122)　1-8　2023/10/10 Publisher: Elsevier BV DOI： 10.1016/j.segy.2023.100122 　 ISSN：2666-9552 More details Close Sector integration is one of the major components considered when designing future smart energy systems. Due to the lack of data, current partitioning of consumers into residential, commercial, industrial, and transportation sectors is based on assumptions on their respective energy demand. In reality though, there is a diversity in preferences and behaviors so that consumers from the same sector may have different demand and consumers from different sectors may have similar demand. With the increasing amount of individual data, it is becoming possible to study this diversity and more accurately partition consumers using advanced analysis techniques such as clustering. However, while this approach does allow for an accurate grouping, the complex mechanisms at the roots of identified clusters are still unclear. Indeed, energy demand depends on multiple factors such as economic, political, cultural, social, or historical besides environmental conditions. The present study uses households’ data provided by the Japanese Ministry of the Environment with the objective of finding patterns associated with residential energy consumption profiles. It is found that the probability distribution of households’ energy consumption seems to be log-normal so that clusters are revealed by first applying a logarithmic nonlinear transformation. Furthermore, k-means clustering, which is commonly used in energy systems study, fails here to correctly identify the clusters when compared with density-based clustering. After identifying clusters, we look for statistically significant specificities in the corresponding households’ data such as their geographical location, number of residents, income, buildings’ construction year, equipment and vehicles and suggest interpretations for each. Overview and Application of the Japan Energy Database Invited Toshihiko Nakata The Energy Conservation　75　(10)　26-30　2023/09/30 Publisher: The Energy Conservation Center, Japan More details Close To support decarbonization efforts rooted in the reality of local energy supply and demand, a research group led by Professor Toshihiko Nakata of Tohoku University has constructed and released the &＃34;Japan Energy Database”. A bottom-up approach for recurrence detection based on sampling distance International-journal Peer-reviewed Rémi Delage, Toshihiko Nakata Chaos: An Interdisciplinary Journal of Nonlinear Science　33　(8)　1-8　2023/08/01 Publisher: AIP Publishing DOI： 10.1063/5.0160832 　 ISSN：1054-1500 eISSN：1089-7682 More details Close One of the major problems faced in the recurrence analysis of dynamical systems is the tangential motion effect affecting the structures in recurrence plots and their quantification. This issue roots to the choice of a threshold for recurrence, making it a crucial parameter for such analyses. It has been shown that a variable threshold following the dynamical changes of the system is more suited to the analysis of non-stationary data as it mitigates this effect. We study here the use of the distance separating successive points in the phase space as a reference for the recurrence threshold. The method relies on a single parameter while qualitatively and quantitatively providing stable recurrence structures as the previously suggested threshold based on the local maximum pairwise distance. This complete bottom-up approach is shown to be beneficial in the presence of abrupt transitions. It is also fairly noise-resistant and is not dependent on the sampling frequency in its normalized formulation. Furthermore, the sampling distance provides a clear reference for the occurrence of the tangential motion effect, allowing to define a default value for the threshold parameter to avoid it. Systematic effects of flexible power-to-X operation in a renewable energy system - A case study from Japan International-journal International-coauthorship Peer-reviewed Hiroaki Onodera, Rémi Delage, Toshihiko Nakata Energy Conversion and Management: X　20　(100416)　1-13　2023/06/28 Publisher: Elsevier BV DOI： 10.1016/j.ecmx.2023.100416 　 ISSN：2590-1745 eISSN：2590-1745 More details Close For achieving a carbon–neutral energy system, economical flexibility mechanisms are crucial to accommodate intermittent and decentralized renewable energy sources. Power-to-X (P2X) is a promising technology for this purpose. This study aims to elucidate the systematic effects and competition of dynamically operated power-to-X (P2X) technologies as a flexibility option in comprehensive renewable energy systems. We developed a linear programming model to optimize energy systems incorporating P2X technologies, including water electrolysis, methanation, Fischer–Tropsch synthesis, and Haber–Bosch synthesis, and investigated the impact of P2X flexibility on the system structure and energy costs, focusing on Japan as a case study. The results demonstrate that each P2X technology effectively shifts electricity loads and reduces curtailment by more than 80%. The contribution of each P2X technology varies, with water electrolysis playing a dominant role due to its relatively low fixed costs and large scale. Furthermore, the mechanism significantly reduces system costs by 35% and supply costs of electricity and hydrogen by 41% and 30%, respectively, by reducing the required capacities of electricity generators, stationary batteries, and transmission grids. Therefore, P2X has a cost advantage over these flexibility options. The results also highlight that the maximum effect is achieved when the capacity factor of P2X is 30%. However, synthetic hydrocarbons would require a carbon price of over 356 EUR/tCO2 to compete with fossil fuels. Domestic electrofuels would face tough competition with global fuel costs. Nevertheless, the reduction in electricity costs through P2X, along with its contribution to energy security, may incentivize its adoption. Society in 2030 as Seen from the Technology Roadmap Vol. 6: The Power and Energy System Field Invited Toshihiko Nakata, Hisashi Kiga, Tomio Okawa, Hitoshi Asano Journal of the Japan Society of Mechanical Engineers　126　(1255)　42-44　2023/06/05 Publisher: The Japan Society of Mechanical Engineers ISSN：0021-4728 More details Close Changes in the composition of the energy system Comparison with Energy Flows in 2013 A 2020 version of the current status of energy flows in Japan is shown in Figure 1 (1). Total Primary Energy Supply (TPES: Total Primary Energy Supply) for the year was 17.4 EJ (LHV basis), a decrease of 8.5 % compared to 19.0 EJ in the 2013 version prepared in 2016. Only 5.54 EJ was effectively used in the industrial, business and other, residential, and transportation demand sectors, while 9.6 EJ, or 55 % of the total, was disposed of as heat. Japan&＃39;s overall net energy use ratio (total energy efficiency) is 32 %, almost the same as the previous 33 %. This is mainly due to the low efficiency of thermal power generation and the low energy efficiency of automobiles. In renewable energy, which converts power generation efficiency to 1, photovoltaic power generation increased from 0.05 EJ to 0.67 EJ and wind power generation increased from 0.02 to 0.08 EJ, but from an overall perspective, the sum of both increased to only 0.68 EJ, or 3.9 % of total primary energy supply. Design of a regional energy system based mainly on green power Invited Toshihiko Nakata Journal of the Japan Society of Mechanical Engineers　126　(1251)　30-32　2023/03 Publisher: Japan Society of Mechanical Engineers ISSN：0021-4728 A variable threshold for recurrence based on local attractor density International-journal International-coauthorship Peer-reviewed Rémi Delage, Toshihiko Nakata Chaos: An Interdisciplinary Journal of Nonlinear Science　32　(093146)　1-8　2022/09/30 Publisher: AIP Publishing DOI： 10.1063/5.0114797 　 ISSN：1054-1500 eISSN：1089-7682 More details Close Recurrence plots along with their quantification measures have demonstrated their usefulness for the study of dynamical systems in many fields. The distance threshold for recurrence is a crucial parameter influencing the observed recurrence structures, thus, the related quantification measures, and have been the object of several studies to find its optimal value. We suggest here a definition of recurrence based on the local attractor density to obtain more qualitative recurrence plots capturing the dynamics at different scales without suffering from variations in the tangential motion effect. The method is qualitatively and quantitatively compared with common thresholding methods on different signals. It is shown that the suggested recurrence plot has more uniform line structures and is less sensitive to the threshold parameter. We also present a modification enhancing its robustness to noise. Multivariate Empirical Mode Decomposition and Recurrence Quantification for the Multiscale, Spatiotemporal Analysis of Electricity Demand—A Case Study of Japan International-journal International-coauthorship Peer-reviewed Rémi Delage, Toshihiko Nakata Energies　15　(17)　6292-6292　2022/08/29 Publisher: MDPI AG DOI： 10.3390/en15176292 　 eISSN：1996-1073 More details Close In the new energy systems’ modeling paradigm with high temporal and spatial resolutions, the complexity of renewable resources and demand dynamics is a major obstacle for the scenario analysis of future energy systems and the design of sustainable solutions. Most advanced models are indeed currently restricted by past temporal energy demand data, improper for the analysis of future systems and often insufficient in terms of quantity or spatial resolution. A deeper understanding on energy demand dynamics is thus necessary to improve energy system models and expand their possibilities. The present study introduces noise-assisted multivariate empirical mode decomposition and recurrence quantification analysis for the study of this problematic variable with a case study of Japan’s electricity demand data per region. These tools are adapted to nonlinear, complex systems’ data and are already applied in a wide range of scientific fields including climate studies. The decomposition of electricity demand as well as the detection of irregularities in its dynamics allow to identify relations with temperature variations, demand sector shares, life style and local culture at different temporal scales. Smart community in Miyako city Invited Toshihiko Nakata Journal of Japan Solar Energy Society　48　(1)　58-63　2022/01 Publisher: Japan Solar Energy Society ISSN：0388-9564 Integrated design of cross-region energy systems considering geographical distribution of energy demand and resources Peer-reviewed Hiroaki Onodera, Kazuyoshi Nemoto, Toshihiko Nakata Energy and Resources　42　(5)　337-350　2021/09/10 Publisher: Japan Society of Energy and Resources DOI： 10.24778/jjser.42.5_337 　 ISSN：2433-0531 More details Close Implementation of the variable and distributed renewable energy to the energy systems is an important approach for decarbonization and transition to sustainable region. The purpose of this study is to clarify the geographical distribution of renewable energy resources and energy demand, and to clarify the effects of cooperation between municipalities for introducing renewable energy. First, energy consumption and renewable energy potential were estimated for 1,741 regions in Japan. The results showed that resources and demands were geographically symmetric and unevenly distributed. Additional analysis considering regional financial capability showed that regional symmetry is more pronounced and that approximately 95% of the municipalities had difficulty implementing regional energy policies individually. We then designed cross-border regions in consideration of cooperation between municipalities with different characteristics. As a result, in the base case, 49 cross-border regions were formed by 284 municipalities, and 108 municipalities shifted to sustainable state that has sufficient renewable energy resources and financial capability Optimal Design and Analysis of Sector-Coupled Energy System in Northeast Japan Peer-reviewed Naoya Nagano, Rémi Delage, Toshihiko Nakata Energies　14　(10)　2823-2848　2021/05/14 Publisher: MDPI DOI： 10.3390/en14102823 　 eISSN：1996-1073 More details Close As for research on sector-coupled energy systems, few studies comprehensively deal with energy carriers and energy demand sectors. Moreover, few studies have analyzed energy conversion functions such as Power-to-Gas, Power-to-Heat, and Vehicle-to-Grid on the energy system performance. This study clarifies the required renewable resources and costs in the sector-coupled energy system and cost-optimal installed capacity and operation. We formulated an optimization model considering sector coupling and conducted a case study applying the model in the Tohoku region. As a result, due to sector coupling, the total primary energy supply (TPES) is expected to decrease, and system costs are expected to increase from 1.8 to 2.4 times the current level. System costs were minimized when maximizing the use of V2G by electric vehicles and district heating systems (DHS). From the hourly analysis, it becomes clear that the peak cut effect by Power-to-Heat and the peak shift effect by Vehicle-to-Grid result in leveling the output of electrolyzer and fuel synthesizer, which improves the capacity factor reducing capacity addition. Since a large amount of renewable energy is required to realize the designed energy system, it is necessary to reduce the energy demand mainly in the industrial sector. Besides, in order to reduce costs, it is required to utilize electric vehicles by V2G and provide policy support for district heating systems in Japan. Spatial–Temporal Estimation and Analysis of Japan Onshore and Offshore Wind Energy Potential International-coauthorship Peer-reviewed Rémi Delage, Taichi Matsuoka, Toshihiko Nakata Energies　14　(8)　2168-2179　2021/04/13 Publisher: MDPI AG DOI： 10.3390/en14082168 　 eISSN：1996-1073 More details Close In the carbon-neutral scenarios fixed by most developed countries, wind and solar resources play a significant role due to their substantial potential. Their instability can be mitigated through smarter designs of energy systems, including sector coupling and cross-border interconnections, which require detailed information on the spatial and temporal evolution of these intermittent resources. The present study aims at estimating the spatial–temporal energy potential of wind in Japan based on meteorological weather data. These data allow to analyze the potential of resources sharing to reduce power generation’s lack and excess, even in such an isolated country due to its variety of climate conditions and local energy demand. The correlation skewness is introduced as a measure of the sites’ uniqueness to identify important sites for the spatial distribution of capacity toward the efficient stabilization of supply at a national scale in a model-free fashion. Analysis of woody biomass utilization for heat, electricity, and CHP in a regional city of Japan International-journal Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Journal of Cleaner Production　290　(125665)　1-12　2021/03/25 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.jclepro.2020.125665 　 ISSN：0959-6526 eISSN：1879-1786 More details Close This study analyzes a regional biomass energy system in Japan. Herein, based on local characteristics, such as the heat load and distribution, we compared the woody biomass used for heat, electricity, and combined heat and power (CHP) with or without a district heating system (DHS). In this study, target demands were selected from the actual residential and commercial sectors of Koriyama City in Fukushima Prefecture using two maps of heat density. A heat pipe network between each buildings was designed using Dijkstra&＃39;s algorithm, and the amount of woody biomass used in each case was fixed such that it satisfied the heat demands of heat-only boilers. Therefore, there were no meshes with unit heat densities >4.2 TJ/ha. However, we found areas with the required heat densities and selected 90 buildings for the DHS. The case that both CHP and DHS were installed and the CHP operational model followed the heat demand (i.e., the “CHP follow” case) was the most effective to reduce CO . When individual heat-only boilers were installed in buildings, the CO reduction was substantial; however, the capital costs associated with heat-only boilers were much higher than the those of the other scenarios. When a heat-only boiler and DHS were installed (i.e., the “Heat DHS” case), the CO reduction was competitive with the “CHP follow” scenario, however, total cost was more expensive. Furthermore, the cost of reducing CO would be larger than that of “CHP follow” case even if the CO emissions factor of grid electricity was less than half of its current value. 2 2 2 2 2 Design of a district heating network based on the linear heat density Peer-reviewed Takaaki FURUBAYASHI, Toshihiko NAKATA Transactions of the JSME (in Japanese)　87　(895)　20-00290　2021/03 Publisher: Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.20-00290 　 eISSN：2187-9761 More details Close This study aims to develop a design methodology for district heating network based on linear heat density. In the previous study, district heating systems including network were designed by applying mixed integer linear programming (MILP), however, number of demands was small because MILP takes long computational time. In this study, we have designed a district heating network design as a spanning tree problem, and have analyzed it based on Prim’s algorithm. First of all, heat demand was analyzed and heat density maps in target municipals were drawn according to the geographical information of buildings, and the statistical data of the energy consumptions. The target buildings as the demand of district heating systems (DHSs) were selected from the higher heat density area in the drawn heat density maps. In the developed methodology in this study, it is assumed that the heat source is installed in the higher heat demand building. Three heat pipe networks were designed based on linear heat density (LHD case), distance (Distance case), and heat demand (Demand case), and their heat loss and cost were analyzed. As a case study, DHSs in Koriyama city and Akita city were designed and compared. The average pipe diameter and the average linear heat density in the LHD case showed similar trend to experiential curve. The trend in heat loss and pipe cost showed rapid increasing as supplied heat increased in LHD case. It can help to select demand buildings for superior performance of DHS. In the Distance case, the minimum heat loss and cost were obtained when supplied heat were higher, however, there were no clear trend in heat loss and pipe cost because they depended on demand distribution. Analysis of the impact of vehicle lightweighting on recycling benefits considering life cycle energy reductions International-journal International-coauthorship Peer-reviewed Fernando Enzo Kenta Sato, Toshihiko Nakata Resources, Conservation and Recycling　164　(105118)　1-15　2021/01 Publisher: ELSEVIER DOI： 10.1016/j.resconrec.2020.105118 　 ISSN：0921-3449 eISSN：1879-0658 More details Close This study evaluates the reductions in energy consumption of vehicle lightweighting, considering the effects of the end of life vehicles (ELV) recycling. For this propose, changes in the material composition of the body in white are assessed by an inventory analysis, including the entire life of the vehicle. The production phase is evaluated considering embodied energy values; the use phase through the mass induced energy consumption; and end of life vehicle recycling considers the part reusing, material recycling, and energy recovery as possible destinations. Moreover, the use of aluminum, advanced high strength steel (AHSS), and carbon fiber reinforced plastic (CFRP) as alternative materials are compared. The Japanese vehicle market has been taken as a case study. Furthermore, the user&＃39;s cost comparison is addressed as an additional assessment variable. Our results show that the effects of vehicle lightweighting on the production and end of life phase are as essential to consider as the benefits generated in its use phase. Moreover, material lightweight must be analyzed jointly with its possible recycling destination, because when the first variable is considered individually, maximum life cycle energy reduction of 23.3 MJ per kg of part to be lightweight can be expected; however, an adequate combination of both variables could almost double those benefits to 51.0 MJ, but also incorrect combinations could be counterproductive guiding to an energy consumption increment of 92.7 MJ. Analysis of electric vehicle batteries recoverability through a dynamic fleet based approach International-coauthorship Peer-reviewed Fernando Enzo Kenta Sato, Toshihiko Nakata Sustainable Production, Life Cycle Engineering and Management　(C3-3)　309-323　2021 DOI： 10.1007/978-981-15-6779-7_22 　 ISSN：2194-0541 eISSN：2194-055X More details Close The aim of this study is to propose a dynamic model for forecasting the changes in the number of batteries recovered from end of life electric vehicles considering different power trains. To achieve a sustainable society, the dependency of the energy on fossil fuels must be overcome. One of the first steps to manage this objective is through the reduction of its direct consumption by the wide-scale adoption of EV (HV/PHV/BEV/FCV). Low cost and stable production of lithium ion batteries (LiB) are expected to be a key element for the electrification of the transportation. For this reason, an efficient cascade use of electric vehicle batteries (EVB) to minimize its raw material supply risk, disposal risk, environmental impact and material cost/consumption in its production process become essential. Additionally, by the promotion of a closed loop life cycle, cost reduction in the end of life batteries treatments can be also expected. However, to grab this opportunity and create a sustainable market, balance between the demand and recoverability of LiB must be clarified to propose reliable second life projects. This study proposes a method based on system dynamics modeling for forecasting the vehicle fleet, sales and end of life vehicles by power train considering data of scrapping rates of vehicles by year of use. Moreover, the supply potential of scrapped batteries from a reverse logistic scheme is analyzed. Here, the Japanese vehicle market is considered as a case study and a timeframe of 2018 to 2050 forecasted. Results indicate that the amount of scrapped EVB will increase 45 times from 2020 to 2050. Moreover, a complete closed loop of them can be expected around 2050 only if the exportation of used electric vehicles is hardly diminished. Quantitative analysis of energy supply and demand structure for regional decarbonization; A case study on Miyako city, Iwate prefecture and the Miyako smart community project Invited Peer-reviewed Naoya Nagano, Takaaki Furubayashi, Toshihiko Nakata Studies in Regional Science　50　(2)　227-241　2020/12 Publisher: JAPAN SECTION OF THE REGIONAL SCIENCE ASSOCIATION INTERNATIONAL DOI： 10.2457/srs.50.227 　 ISSN：0287-6256 eISSN：1880-6465 More details Close Following the Paris agreement, the Japanese government has asked local municipalities to formulate a ‘Decarbonization plan.’ In order to build up an effective action plan, it is necessary to clarify energy supply and demand structure on a regional scale. However, the official statistics of energy data which is the basis of understanding the regional energy structure, is not sufficiently organized at the municipal scale in Japan. Therefore, in this research, we aim to suggest a way to clarify regional energy supply and demand structure by drawing energy flow charts. Moreover, we also analyze changes in regional energy systems introducing renewable energy resources and evaluate their impacts on carbon emissions reduction and improvement of energy system efficiency on data analysis. This data set has been collected from the operational characteristics of smart community projects underway in Miyako city, Iwate prefecture. A smart community aims for an innovative energy system introducing ICTs to improve efficiencies as well as QOL. In the project, electricity generated from 4 MW PV plants is supplied to the customer facilities through the integration by CEMS (Community Energy Management System). The accumulated data from smart meters and the EMS (Energy Management System) is also used in the analysis. Regional Spatial Analysis of the Offshore Wind Potential in Japan International-journal International-coauthorship Peer-reviewed Yannek Bardenhagen, Toshihiko Nakata Energies　13　(23)　6303-6320　2020/12 Publisher: MDPI DOI： 10.3390/en13236303 　 eISSN：1996-1073 More details Close This study presents an approach for estimating the offshore wind potential of Japan. Bathymetry data (1 km mesh) and near shore wind speed data of the year 2018 were used to assess the potential. A turbine with a peak power of 10.6 MW was employed for the analysis. The potential was calculated for multiple regions. These regions are based on the service areas of the major electricity supply companies in Japan. Overall, the results show that Japan has the potential to produce up to 32,028 PJ electricity per year. The electricity demand of 2018 amounts to 3231 PJ. The potential is therefore large enough to cover Japan&＃39;s electricity needs ten-times over. The capacity that could theoretically be installed amounts to 2720 GW, which is a multiple of the current worldwide installed capacity of 29.1 GW (2019). In addition to the huge potential, the regional assessment shows that the regions vary greatly in their potential; of all the considered regions, Hokkaido and Kyushu have the highest overall potential. Well-to-wheel Analysis of Fuel Cell Vehicles from Energy System Perspectives Invited Toshihiko Nakata Journal of Society of Automotive Engineers of Japan　74　(10)　86-92　2020/10 Publisher: Society of Automotive Engineers of Japan ISSN：0385-7298 More details Close Fuel cell vehicles are expected to be a key actor for coming hydrogen society in Japan. However, because of different source of fuel hydrogen, there remains uncertainty of the real value of FCVs. A question arises of what is benefit of introducing FCVs compared with other passenger vehicles such as HEVs and EVs. This study investigates the characteristics of FCVs in Well-to-wheels using inventory analysis. Analytical results indicate that FCVs have an important benefit of reducing carbon emissions provided carbon free hydrogen fuel by green electricity derived electrolysis. In the total cost of ownership, price of FCVs is the dominant expenditure, which suggest the secure of FCV’s cost reduction. District heating systems and smart energy Invited Toshihiko Nakata Journal of Japan Solar Energy Society　46　(5)　11-16　2020/09 ISSN：0388-9564 Rethinking sustainable bioenergy development in Japan: decentralised system supported by local forestry biomass International-journal International-coauthorship Peer-reviewed Chun Sheng Goh, Takanobu Aikawa, Amanda Ahl, Kanae Ito, Chihiro Kayo, Yasunori Kikuchi, Yasuo Takahashi, Takaaki Furubayashi, Toshihiko Nakata, Yuichiro Kanematsu, Osamu Saito, Yoshiki Yamagata Sustainability Science　15　(5)　1461-1471　2020/09/01 Publisher: SPRINGER JAPAN KK DOI： 10.1007/s11625-019-00734-4 　 ISSN：1862-4065 eISSN：1862-4057 More details Close Bioenergy has been promoted in Japan with ambitious targets. However, the incentive schemes excluded renewable heat and overlooked synergies with local forest management, leading to the development of large-scale biomass plants that heavily rely on overseas biomass supplies. This case report discussed an alternative scenario of decentralised bioenergy systems supported with local biomass through five important questions. The currently available knowledge indicates that such a scenario is feasible with integrative forest management that considers both ecosystem services and multiple uses of wood. In addition to various environmental benefits, replacing imported fossil fuels with local biomass can also enhance energy security. Realising this scenario requires careful consideration of local context, empowerment of local governments and encouragement of both public and private initiatives. Energy consumption analysis for vehicle production through a material flow approach International-journal International-coauthorship Peer-reviewed Fernando Enzo Kenta Sato, Toshihiko Nakata Energies　13　(9)　1-18　2020/05 Publisher: MDPI DOI： 10.3390/en13092396 　 eISSN：1996-1073 More details Close The aim of this study is to comprehensively evaluate the energy consumption in the automotive industry, clarifying the effect of its productive processes. For this propose, the material flow of the vehicles has been elaborated, from mining to vehicle assembly. Initially, processes where each type of material was used, and the relationship between them, were clarified. Subsequently, material flow was elaborated, while considering materials input in each process. Consequently, the consumption of energy resources (i.e., oil, natural gas, coal, and electricity) was calculated. Open data were utilized, and the effects on the Japanese vehicle market were analyzed as a case study. Our results indicate that the energy that is required for vehicle production is 41.8 MJ/kg per vehicle, where mining and material production processes represent 68% of the total consumption. Moreover, 5.23 kg of raw materials and energy resources are required to produce 1 kg of vehicle. Finally, this study proposed values of energy consumption per mass of part produced, which can be used to facilitate future material and energy analysis for the automotive industry. Those values can be adopted and modified as necessary, allowing for possible changes in future premises to be incorporated. What Chemistry Can Do for the Practical Application of Renewable Energy Economics of Renewable Energy - Mechanisms for Cost Reduction through Technological Advancement Invited Peer-reviewed Toshihiko Nakata Chemistry　75　(5)　19-22　2020/05 Publisher: Kagakudojin ISSN：0451-1964 Possible contribution of biomass toward RE 100 Invited Toshihiko Nakata, Takanobu Aikawa, Asako Nagano, Michio Sato, Seiichi Suzuki Enermix　99　(2)　114-128　2020/03 Publisher: Japan Institutenof Energy DOI： 10.20550/jieenermix.99.2_114 　 ISSN：2432-3586 Productivity assessment of harvesting mechanization for sustainable forest utilization in mountainous areas. Peer-reviewed Takashi Sato, Takaaki Furubayashi, Kazuyoshi Nemoto, Toshihiko Nakata Journal of The Japan Forest Engineering Society　35　(1)　15-24　2020/01/31 Publisher: The Japan Forest Engineering Society DOI： 10.18945/jjfes.35.15 　 ISSN：1342-3134 More details Close In this study, we define sustainable forest utilization based on forest information and assess the productivity of harvesting process of forestry machinery for sustainable utilization of forests in the Oku Aizu region of Fukushima Prefecture. First, we look at the case of the Nishikata area in Mishima town and analyze its labor productivity. Then, we consider the adaptation of the harvesting system used in the Nishikata area throughout the Oku Aizu region and evaluate the number of personnel required for sustainable forest utilization. The productivity assessment of the harvesting system in the Nishikata area provided an estimate of 3.3–8.3 m ³ /person-day in the steeply sloping forests. Productivity in the gently sloping forests was estimated to be 38–53 m ³ /person-day. Sustainable forest utilization in the Oku Aizu region requires harvesting and reforesting 160–180 ha/year. The number of persons needed for harvesting in Oku Aizu was 34–110 in the first 50 years and 34–76 thereafter. Using the suggested process, productivity in the gently sloping forests in the Nishikata area was similar to that in Austria and other countries with developed forestry. Meanwhile, the productivity of the steeply sloping forests was either equal to or higher than that in Japan at present. Measures to improve productivity in countries with industrial forestry necessitate expanding the forest road network and revising working hours. The Future of Japan&＃39;s Crisis Management Organization (Special Feature: All-out Efforts for Disaster Prevention and Mitigation to Protect Lives) Invited Toshihiko Nakata Komei　160　(169)　10-15　2020/01 Publisher: None Machine learning for modeling energy systems complexity International-journal International-coauthorship Peer-reviewed Remi Delage, Toshihiko Nakata ECOS 2020 - Proceedings of the 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems　2405-2414　2020 More details Close In the context of rising concerns on climate change, efforts are made to improve our energy systems with the target of a carbon-neutral society by 2050. Energy systems are complex systems yet most modeling approaches do not consider their core aspects described by complexity science so far. These aspects can be grouped into Adaptation, Nonlinearity, Self-organization, and Network, which are interrelated and without which one cannot explain energy systems complex dynamics. The present study suggests the use of machine learning models to capture energy systems complexity. Some studies have already implemented machine learning for cluster analysis or forecasting purposes, but the potential of such techniques is still far from being fully exploited. We remind some understanding of complex systems then explain how machine learning models can complement or surpass current models as well as their limitations. Concrete examples are given for real applications. Recoverability analysis of critical materials from electric vehicle lithium-ion batteries through a dynamic fleet-based approach for Japan International-journal International-coauthorship Peer-reviewed Fernando Enzo Kenta Sato, Toshihiko Nakata Sustainability (Switzerland)　12　(1)　147-164　2020/01/01 Publisher: MDPI DOI： 10.3390/SU12010147 　 eISSN：2071-1050 More details Close This study aims to propose a model to forecast the volume of critical materials that can be recovered from lithium-ion batteries (LiB) through the recycling of end of life electric vehicles (EV). To achieve an environmentally sustainable society, the wide-scale adoption of EV seems to be necessary. Here, the dependency of the vehicle on its batteries has an essential role. The effcient recycling of LiB to minimize its raw material supply risk but also the economic impact of its production process is going to be essential. Initially, this study forecasted the vehicle fleet, sales, and end of life vehicles based on system dynamics modeling considering data of scrapping rates of vehicles by year of life. Then, the volumes of the critical materials supplied for LiB production and recovered from recycling were identified, considering variations in the size/type of batteries. Finally, current limitations to achieve closed-loop production in Japan were identified. The results indicate that the amount of scrapped electric vehicle batteries (EVB) will increase by 55 times from 2018 to 2050, and that 34% of lithium (Li), 50% of cobalt (Co), 28% of nickel (Ni), and 52% of manganese (Mn) required for the production of new LiB could be supplied by recovered EVB in 2035. Well-to-wheel analysis and a feasibility study of fuel cell vehicles in the passenger transportation sector Peer-reviewed Teruhisa Uchida, Takaaki Furubayashi, Toshihiko Nakata Transactions of the JSME (in Japanese)　85　(872)　18-00122-18-00122　2019/04 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.18-00122 　 ISSN：2187-9761 More details Close

Fuel cell vehicles are expected to be a key actor for coming hydrogen society in Japan. However, because of different source of fuel hydrogen, there remains uncertainty of the real value of FCVs. A question arises of what is benefit of introducing FCVs compared with other passenger vehicles such as HEVs and EVs. This study investigates the characteristics of FCVs in Well-to-wheels using inventory analysis and forecast penetration of FCVs into the passenger transportation sector applying an energy-economic model. Analytical results indicate that (1) FCVs have an important benefit of reducing carbon emissions provided carbon free hydrogen fuel by green electricity derived electrolysis. (2) Under the carbon reduction target of -80% in the year 2050, the share of FCVs in the passenger vehicle transportation sector reaches 14%, which is higher than 1% without carbon constraint. (3) In the total cost of ownership, price of FCVs is the dominant expenditure, which suggest the secure of FCV&＃39;s cost reduction. The result of the study shows that the penetration of FCVs into the passenger transportation market requires competitive price of the vehicle as well as higher carbon reduction target.

Design and analysis of district heating systems utilizing excess heat in Japan International-journal Peer-reviewed Shin Fujii, Takaaki Furubayashi, Toshihiko Nakata Energies　12　(7)　1202-1215　2019/03/28 Publisher: MDPI DOI： 10.3390/en12071202 　 ISSN：1996-1073 eISSN：1996-1073 More details Close District heating systems (DHSs) which utilize excess heat play an important role in energy infrastructure in many European countries. In contrast to Europe, the DHS is not common and excess heat is not reused effectively in Japan. Almost all the DHSs in Japan were designed as first-generation district heating (1GDH) systems or 2GDH systems. No 4GDH systems have been introduced in Japan. The present study designs a 4GDH system utilizing excess heat from a wide area of Northern Japan and evaluates its feasibility. First, available heat amounts from two excess heat resources were calculated: waste incineration plants and thermal power plants. Second, heat demand from both residential and commercial sectors was estimated using a 1 km mesh, and a heat load curve was created for each mesh based on load curve data. Third, the DHS was designed with excess heat plants as a supply-side heat resource, and spatial information of the demand side made use of the geographical information system (GIS). Further analysis was conducted on selected DHSs in three cities in order to evaluate those systems’ feasibility based on energy efficiency, CO emissions, and economic aspects. The result shows that 70.5 PJ of heat can be supplied by DHS in Northern Japan, replacing imported fossil fuels such as petroleum and LPG with regional excess heat. The designed DHS could supply heat with equivalent costs compared to European countries. 2 Application of energy and CO2 reduction assessments for end-of-life vehicles recycling in Japan International-journal International-coauthorship Peer-reviewed Fernando Enzo Kenta Sato, Takaaki Furubayashi, Toshihiko Nakata Applied Energy　237　779-794　2019/03/01 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.apenergy.2019.01.002 　 ISSN：0306-2619 eISSN：1872-9118 More details Close The transportation sector constitutes approximately 25% of the total energy consumption and CO emissions worldwide. Therefore, in the last decades, several studies have been conducted to improve the energy efficiency of vehicles. A principal method to evaluate the total environmental effect of a vehicle is through the analysis of its life cycle. However, most of these analysis focused on the production and use phase, and little work has been performed to understand the material value of end-of-life vehicles (ELVs). Previous works have not comprehensively considered the benefits of the phase above that can provide a different perspective on the total vehicle life cycle. Our study clarifies how the materials obtained from scrapped vehicles are used, and we propose an analysis method to assess their benefits by defining the concepts of energy and CO reductions. The Japanese ELV market is presented as a case study, and the material flow is elaborated. The energy and CO reductions are calculated as 52.8 MJ and 2.80 kg CO per kilogram of vehicle, demonstrating the importance of the analyzed phase in the entire life cycle. Finally, possible changes in ELV recycling to improve their benefits are discussed. 2 2 2 2 Strategies for Future Utilization of Biomass as an Energy Resource Invited Asako Nagano, Masahiro Sameshima, Takanobu Aikawa, Kenji Yamaji, Miyuki Tomari, Toshihiko Nakata, Kinya Sakanishi, Yukihiko Matsumura Nihon Enerugii Gakkai Kikanshi Enermix　98　(1)　2-28　2019 Publisher: The Japan Institute of Energy DOI： 10.20550/jieenermix.98.1_2 　 ISSN：2432-3586 Universality and Specificity under the Paradigm Shift of Quality over Quantity Invited Toshihiko Nakata Nihon Enerugii Gakkai Kikanshi Enermix　98　(6)　637-637　2019 Publisher: The Japan Institute of Energy DOI： 10.20550/jieenermix.98.6_637 　 ISSN：2432-3586 Design of Sustainable EFB Utilization System Considering International Transportation Peer-reviewed Takaaki Furubayashi, Kosuke Akao, Toshihiko Nakata, Hidekazu Kasai Journal of the Japan Institute of Energy　97　(10)　314-329　2018/10 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.97.314 　 ISSN：0916-8753 eISSN：1882-6121 More details Close

Oil palm residue is expected as a prospective alternative to fossil fuels for mitigating greenhouse gas emissions. Coal and biomass co-firing power generation is introduced in Japan as cheaper biomass option. This study aims to design a sustainable empty fruit bunch (EFB) utilization system for co-firing fuel considering international transportation from Malaysia to Japan, and to evaluate the system performance based on energy balances, costs and environmental impacts. The EFB utilization system consists of six processes such as resource collection, raw EFB transportation from resource generation point to preprocessing facilities, preprocessing, produced bio-fuel transportation from preprocessing facilities to exporting ports, and international transportation. The transportation pathways in the Malaysia is optimized using the geographical information system (GIS) based on the actual road network. As preprocessing technologies, pelletizing, carbonization, and ethanol production are considered. The results show that the CO₂ reduction cost in the case that EFB is pelletized in the distributed preprocessing facilities in the target area has negative value -4.35 USD/t-CO₂ that shows the EFB pellet supply cost is cheaper than the coal. The CO₂ reduction costs in the case that EFB is carbonized 141 USD/t-CO₂, and that the bio-ethanol is produced from EFB 393 USD/t-CO₂ are also cheaper than the domestic wood pellet supply system in Japan. In the sensitivity analysis, it is shown that the available amount of raw EFB has the effect on the CO₂ reduction cost of the carbonization and the bio-ethanol production. On the other hand, it has small effect on the pelletizing.

Multifaceted analysis and integrated design for global supply chain of empty fruit bunch Peer-reviewed Yuka Yokoi, Takaaki Furubayashi, Toshihiko Nakata, Hidekazu Kasai, Yuka Ochi European Biomass Conference and Exhibition Proceedings　2018　(26thEUBCE)　855-866　2018/05 Publisher: ETA-FLORENCE RENEWABLE ENERGIES ISSN：2282-5819 eISSN：2282-5819 More details Close The purpose of this study is the analysis and the integrated design of sustainable EFB (empty fruit bunch) supply chain from pelletizing to exporting. In this study, Malay Peninsula is set to be as an analytical target place, supply chain of EFB pellets as a biomass derived from oil palm are analyzed in different cases. In order to grasp the difference of the whole system performance in cases, a simple mill case and multiple mill case are prepared. Cases include two cases “EFB concentrated processing case” and “EFB distributed processing case”. Supply chain is composed with three sectors, resource, supply and demand, and this study analyzes the supply sector. Processes of the supply sector are extract, transport, dry, pelletize and ship. By differing the layout of the dry process before and after transport in two cases, case 1-d and case 1-w, influence of the difference in water content of biomass is evaluated in each case. Based from the retail analysis, CO emission of EFB distributed processing case is 2.60 kg-CO /GJ-pellet and resource utilization rate of this case is 62%. By substituting coal by EFB pellets, 0.08 t-CO /GJ-pellet is reduced. 2 2 2 Design of a sustainable woody biomass supply chain considering facility location problem Peer-reviewed Takaaki Furubayashi, Yuki Sato, Toshihiko Nakata, Hidekazu Kasai Transactions of the JSME (in Japanese)　84　(860)　17-00565-17-00565　2018/04 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.17-00565 　 ISSN：2187-9761 More details Close

The purpose of this study is to design a sustainable supply chain of wood biomass fuel by applying a mixed integer programming (MIP: Mixed Integer Programming). To evaluate the effect of routing choice quantitatively, two objective functions are defined; cost minimization and energy consumption minimization. In the Railway case, 4 t truck can be used to transport wood logs and pellets, and railway can be used to transport pellets. In the Heavy truck case, three types of trucks (4 t, 10 t, 20 t) can be used to transport wood logs and pellets. As a case study area, five prefectures of Japan&＃39;s Tohoku region are selected. The computational result provides that supply cost becomes 17,058 - 24,773 JPY/t_pellet. In any case, since cost of pellet supply is lower than distribution price of pellet which is 45,000 JPY/t_pellet in Japan, letting break-even point to distribution price of domestic pellet, this system has competitiveness to Japanese pellet suppliers. Effective utilization rates of biomass resource through supply chain show 0.802 - 0.834 that is higher than the previous study using waste woods. The CO₂ reduction by coal substitution shows 0.967-1.029×10⁶ t-CO₂/year which shares 65 - 69 % of CO₂ emission from the coal combustion.

Energy and CO2 Benefit Assessment of Reused Vehicle Parts through a Material Flow Approach International-journal International-coauthorship Peer-reviewed Fernando Enzo Kenta Sato, Takaaki Furubayashi, Toshihiko Nakata International Journal of Automotive Engineering　9　(2)　91-98　2018/02 Publisher: Society of Automotive Engineers of Japan, INC DOI： 10.20485/jsaeijae.9.2_91 　 ISSN：2185-0984 More details Close The aim of this study is to quantitatively evaluate the benefits of reused vehicle parts through a material flow approach. The energy consumed by new components for vehicle repairing can be saved. Moreover, an appropriate use of materials obtained from end-of-life vehicles (ELVs) contributes to waste reduction. Each reused part has different material compositions, weights, and demand; thus, the total benefit is evaluated using inventory analysis by introducing the definition of embodied energy and CO₂ emissions. The Japanese ELV market was taken as a case study, and the results show that energy and CO₂ saved by reusing parts are approximately 35.3 GJ and 1,887 kg-CO₂ per vehicle, and 111 PJ and 6 MM ton-CO₂ for the market in Japan. Finally, possible measures to boost the current benefits are discussed. Cost and CO2 reduction of biomass co-firing using waste wood biomass in Tohoku region, Japan International-journal Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Journal of Cleaner Production　174　1044-1053　2018/01/20 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.jclepro.2017.11.041 　 ISSN：0959-6526 eISSN：1879-1786 More details Close This paper aims to estimate the costs and CO emissions of wood biomass co-firing in the Tohoku region of Japan. A woody biomass supply system is designed, which comprises of four processes: collection, resource transportation, preprocessing, and fuel transportation. Preprocessing is further divided into two processes: drying and fuel production. Sawmill residue, construction waste, forest residue, thinning residue, and fruit-tree pruning residue are treated as raw materials. Wood chips, pellets, and torrefied pellets (known as black pellets) are regarded as bio-fuels. The raw-material and bio-fuel transportation pathways are optimized using a geographical information system (GIS). In the Tohoku area, the availability of raw-material is 3.6 PJ/y, and the results indicate that the preprocessing plant locations should be widely distributed in that region, because the resource transportation costs have a significantly greater influence on the costs and emissions than the scale effect of the preprocessing facilities. The chip production case exhibits the smallest energy consumption of 3.8 GJ/t, the lowest supply cost of 1558 JPY/GJ, and the largest CO reduction of 252 × 10 t CO /y, whereas the pellet production case exhibits a supply cost and CO reduction of 1643 JPY/GJ and 229 × 10 t CO /y, respectively. The energy consumption, energy waste, and cost of torrefaction are greater than the reductions in the transportation energy and cost due to wider distribution of the preprocessing plants; thus, the black pellet case has a larger supply cost than the chip and pellet cases. 2 2 2 2 2 3 3 Design of the regional energy system in Japan for zero carbon and high resilience Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Sustainable Development of Energy, Water and Environmental System (SDEWES) conference proceedings　0418　1-12　2017/11 Optical imaging of nanosized structures by using plasmonically excited cascade near-field coupling with a carbon nanotube probe Masahiro Watanabe, Takehiro Tachizaki, Toshihiko Nakata JOURNAL OF APPLIED PHYSICS　122　(13)　2017/10 Publisher: AMER INST PHYSICS DOI： 10.1063/1.4986369 　 ISSN：0021-8979 eISSN：1089-7550 More details Close Near-field scanning optical microscopy (NSOM) overcomes the diffraction limit, thereby realizing a spatial resolution far beyond the wavelength of light used. However, NSOM still has a problem in repeatable imaging at the high spatial resolution and high contrast with conventional aperture or apertureless probes that are needed for practical applications. Here, we describe an optical imaging technique based on plasmonically excited cascade near-field coupling that has the potential to achieve single-nanometer spatial resolution with high imaging repeatability. This technique makes use of a plasmon waveguide coupled with a high-stiffness carbon nanotube optical probe. Through the action of surface plasmon polaritons, the input far-field light is converted into an optical near field that is used as an excitation source. This excitation near field is strongly enhanced and concentrated on the probe tip such that it generates a second near field as a nanosized probe spot on the apex of the tip. Extremely high-resolution optical imaging is accomplished by scanning the sample surface with the probe spot. At a wavelength of 850 nm, a 5-nm-wide metallic striped pattern on a cross-sectional superlattice sample was clearly resolved as a permittivity distribution. Published by AIP Publishing. Design of district heating system based on linear heat density in Japan Invited Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Proceedings of the ICMass 2017. International Conference on Materials and Systems for Sustainability　1-1　2017/09/29 Assessing the real impact of the ELV to the entire vehicle life cycle, a material reusing and recycling approach International-coauthorship Invited Peer-reviewed Fernando Enzo Kenta Sato, Takaaki Furubayashi, Toshihiko Nakata Proceedings of the ICMass 2017. International Conference on Materials and Systems for Sustainability　1-1　2017/09/29 Optimal Design of Woody Biomass Harvesting System Based on a Spatial Information Analysis of Forest Resources Invited Peer-reviewed Kosuke Okano, Takaaki Furubayashi, Toshihiko Nakata Proceedings of the ICMass 2017. International Conference on Materials and Systems for Sustainability　1-1　2017/09/29 Analyzing Food and Energy Nexus Based on Supply Resources, Material Flows, and Prices Invited Peer-reviewed Saki Kawashima, Takaaki Furubayashi, Toshihiko Nakata Proceedings of the ICMass 2017. International Conference on Materials and Systems for Sustainability　1-1　2017/09/29 Induced technological change and the timing of public R&D investment in the Japanese electricity sector considering a two-factor learning curve International-journal Peer-reviewed Takafumi Usui, Takaaki Furubayashi, Toshihiko Nakata Clean Technologies and Environmental Policy　19　(5)　1347-1360　2017/07 Publisher: SPRINGER DOI： 10.1007/s10098-017-1333-1 　 ISSN：1618-954X eISSN：1618-9558 More details Close The UNFCCC has stated that energy policies and measures to address climate change should be cost-effective to ensure global benefits at the lowest possible cost. To mitigate the bulk of carbon emission from the electricity sector, a large market penetration of renewable energy technologies with as low cost as possible is a key research topic. The energy-related R&D policy in Japan aims to achieve a green economy. In our study, based on this context, we demonstrated how to optimize the timing of public R&D investment within the framework of a bottom-up partial equilibrium model. The developed optimization model represents the Japanese electricity sector and minimizes the total system cost subject to an accumulated carbon emission constraint. Our main research focus is the role of R&D activity, especially in the innovation stage of renewable technologies. We employ a two-factor learning curve and quantify the impact of the learning effect on the dynamic diffusion of major renewable technologies. The study shows a dynamic technology transition in the Japanese electricity sector and the optimized R&D investment schedule for each renewable technology. With the first-best energy policy, an R&D budget of more than 2000 million USD would be allocated to PV in 2050, which corresponds to 45% of the energy-related Japanese R&D budget in 2050. Because some have criticized the uncertainty problems with dynamic simulations and learning models, supplemental sensitivity analyses are included. Wood Flow Chart for Japan: Material and Energy Utilization Peer-reviewed Takaaki Furubayashi, Yuta Sumitomo, Toshihiko Nakata Journal of the Japan Institute of Energy　96　(7)　206-216　2017/07 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.96.206 　 ISSN：0916-8753 eISSN：1882-6121 More details Close

This study aims to make a quantitative wood flow chart in Japan. The wood flow chart includes basic information for designing the wood utilization system. The wood demand and the wasted wood amount in each industry are estimated based on the supplied wood amount. It is obtained that the estimated production amounts are similar to statistical data. According to the drawn wood flow chart in 2014, it is found that the main resources of the wood energy are the residues from the wood industry and the construction waste, and the share of the round wood in the energy use is less than 10%. 8.1 million m³ wood residues such as sawdust are generated, and 95% is utilized to the chip, self-consumption, and other wood material products. Therefore, it is required to utilize the round wood to energy use for increasing the wood self-sufficiency. According to the drawn wood flow chart in 2025 that expects higher wood self-sufficiency, it is obtained that the imported round wood amount is zero, the generated residue amount is increased because of increasing the wood production amount. It is required to increasing the domestic wood supply amount for the pulp industry for increasing the wood self-sufficiency because 16 million m³ chip for pulp is still imported.

Cost Assessment of a District Heating System in Northern Japan Using a Geographic Information-Based Mixed Integer Linear Programming Model International-journal International-coauthorship Peer-reviewed Ivar Baldvinsson, Toshihiko Nakata Journal of Energy Engineering　143　(3)　1-12　2017/06/01 Publisher: ASCE-AMER SOC CIVIL ENGINEERS DOI： 10.1061/(ASCE)EY.1943-7897.0000371 　 ISSN：0733-9402 eISSN：1943-7897 More details Close This paper presents a geographic information-based mixed integer linear programming model for a district heating system design. The model minimizes the annualized investment and operation costs of the system, with the key results showing the optimal distribution network structure and optimal capacity and dispatch of heat plants. A network topology of nodes and edges, providing accurate geographic representation of the district, is generated using a geographic information system and acts as a constraint. A case study is conducted for a district in Hirosaki city, located in the northernmost prefecture of mainland Japan. The results demonstrate the considerable economic benefits of integrating locally available woodchips in heat-only boilers instead of using city gas due to lower fuel costs. Low temperature operation reduces the fuel costs due to less network heat loss compared to medium temperature operation, but it is overcome by the cost of the larger pipe size and the pumping power. Implementation of the district heating system to the case area encourages sustainable development through economic favorability, decreased primary energy consumption, and considerable CO2 emissions reduction, compared to the current heat supply structure. A novel approach for analyzing the food-energy nexus through on-farm energy generation International-journal International-coauthorship Peer-reviewed Marisabel Cuberos Balda, Takaaki Furubayashi, Toshihiko Nakata Clean Technologies and Environmental Policy　19　(4)　1003-1019　2017/05 Publisher: SPRINGER DOI： 10.1007/s10098-016-1295-8 　 ISSN：1618-954X eISSN：1618-9558 More details Close To find a balance between food and energy security, this research presents the design of an energy self-sufficient farm in electricity, heat and bioethanol, which is produced by energy crops and agricultural residues. The farm proposed is evaluated by two models: Land Optimization and Cost Optimization. Due to the food–fuel debate over land and the detriment of food security, this research proposes utilizing the current abandoned land and increasing the food self-sufficiency ratio (FSSR) of the crops analyzed (rice, wheat and maize). The farm is optimized for several food and fuel demands, with a maximum farm unit size of 100 ha. The result is a myriad of farms of different sizes, each optimized for a certain demand. Subsequently, the amount and variety of such farms are optimized maximizing the food and fuel produced for each city of the case study (Miyagi Prefecture, Japan). The results suggest that the establishment of energy self-sufficient farms in the abandoned land can stimulate the biofuel industry and increase food security simultaneously. The FSSR of maize and wheat can be improved in approximately 10–25 and 7–9 %, respectively. The estimated bioethanol potential is 3.2–3.8 ML. Additionally, a surplus of electricity and heat, approximately 61–65 GWh and 60–165 MJ, respectively, is obtained. As the Land Optimization model proposed is sensitive to crop yields, a simultaneous evaluation is recommended. The results also suggest that the farms must be larger than 8 ha to achieve self-sufficiency; therefore, the policies involved need further evaluation. Wood biomass utilization system based on logistics and space information of resources Invited Hirotaka Satake, Takaaki Furubayashi, Toshihiko Nakata, Hirokazu Kasai Chemical Enginerring　62　(3)　201-209　2017/03 Publisher: None ISSN：0387-1037 Preliminary study of energy security and energy resilience evaluation in Japan Peer-reviewed Ryosei Sai, Takaaki Furubayashi, Toshihiko Nakata Transactions of the JSME (in Japanese)　83　(846)　16-00161-16-00161　2017/02 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.16-00161 　 ISSN：2187-9761 More details Close

Improving national energy security has been recognized as one of the most important perspectives of energy policy in Japan. On the other hand, a notion of higher energy resilience has recently become common to make a domestic energy supply system stable since the Great East Japan earthquake occurred in 2011. Therefore, a purpose of this study is to establish frameworks that evaluate energy security and energy resilience quantitatively to design a sustainable energy system. An advanced framework for energy security evaluation is developed in which Resource Diversity, Import Price, Import Region Diversity, Environmental Impact and Energy Efficiency are selected as criteria, where each criterion is normalized between 0 (extremely low security) and 1 (extremely high security). In addition, a multi-objective analysis using the augmented ε-constraint method (AUGMECON) is conducted to determine the best energy resource configuration for a Japanese energy system from the perspective of both energy security and economic feasibility. On the other hand, energy resilience evaluations are conducted in accordance with four steps: identifying risks, assessing risks, building resilience, and evaluating resilience. Energy resilience is evaluated based on two criteria. The first one is Resilience Index which is calculated by a ratio between energy supply and energy demand. The second one is an economic loss incurred by a sudden energy supply interruption. In conclusion, in order to develop a sustainable energy system in Japan, it is important to increase the proportion of renewable energy consumption, which contributes to enhancing both national energy security and regional energy resilience.

Steam turbine life cycle cost evaluations and comparison with other power systems International-journal International-coauthorship Peer-reviewed Toshihiko Nakata Advances in Steam Turbines for Modern Power Plants　93-106　2017 DOI： 10.1016/B978-0-08-100314-5.00005-1 　 More details Close The steam turbine has been a key component in electrical power generation since the 19th century, as one of the distinctive outcomes of the industrial revolution. In this chapter, we will show the method of cost evaluations and how they change with time. As well as depreciation accounting, diversification of society&＃39;s needs leads to better innovation and raises the level of technology. The concept of technological learning is explained to find out how much costs decline with the popularization of technologies. Some generating technologies use similar components and these components learn at the same rate as these units are built. Technological progress mainly depends on three learning sources: learning-by-doing, research and development activity, and knowledge spillover. Optimum design for an energy system based on thermal engineering Invited Peer-reviewed Toshihiko Nakata Science of Machine　69　(1)　1-6　2017/01 Publisher: Yokendo ISSN：0368-5713 Meeting the Challenge of Realizing a High Ratio Co-Firing System with Woody Biomass Peer-reviewed Hidekazu Kasai, Hitoshi Fukushima, Masato Tamura, Kazuyuki Inubushi, Toshihiko Nakata Journal of IHI Technologies　57　(1)　76-93　2017 Publisher: None ISSN：1882-3041 More details Close Although pulverized coal-fired power plants are important as base-load power sources, they emit a large amount of carbon dioxide ( CO2 ). Given this, it is necessary to reduce their CO2 emissions, and co-firing with carbon-neutral woody biomass is an important measure for achieving this. However, while Japan possesses an abundance of forest resources, the actual biomass- to-coal ratio achieved in co-firing remains as low as a few calorific percent. Aiming to achieve 50% co-firing on a thermal basis, IHI has been working to verify and demonstrate the effectiveness of a comprehensive system — including the supply chain for the woody biomass — in cooperation with some universities. Eventually, in FY2015, IHI carried out demonstration experiments involving processes from logging, wood collection, processing, and transportation through to co-firing power generation at a 150 MW-class commercial thermal power plant. These experiments demonstrated that a co-firing biomass-to-coal ratio of 25% ( thermal basis ) can be achieved using purely domestic fuel. Integrated Design for Sustainable Energy Systems Invited Peer-reviewed Toshihiko Nakata, Takaaki Furubayashi IEEJ System Study Group Materials　ST-17　(38-60)　1-4　2017 ISSN：2423-8325 Analysis of local energy demand-supply distribution and visualization of the energy spatial information toward smart community Peer-reviewed TAKITA Yuki, FURUBAYASHI Takaaki, NAKATA Toshihiko Transactions of the JSME (in Japanese)　82　(844)　16-00100-16-00100　2016/12 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.16-00100 　 ISSN：2187-9761 More details Close

The purpose of this paper is to analyze energy consumption and supply on a prefectural scale, and to visualize and compare the regional energy demand-supply distribution considering potential of renewable energy. The final energy consumption and the final energy consumption per capita are related to the industrial sector. Total final energy consumption is reported to be 13,297 PJ, of which 6,136 PJ is used for the industrial sector. In the residential and commercial sector, population is the most effective on the final energy consumption. On the other hand, final energy consumption per capita in residential sector is tied to the climate: cold areas like Hokkaido, Tohoku, and Hokuriku have larger consumption than other areas. Energy expenditure per capita in residential sector is also large in cold areas; for instance, 98,581 JPY/capita is spent for energy in Hokkaido. The energy supply system in Japan depends on thermal power generation that is large scale-centralized; Chiba has the largest thermal power generation estimated at 390 PJ. By contrast, thermal power generation in Yamanashi is the smallest in Japan estimated at 0.5 PJ. Renewable resources are widely distributed in Japan, but renewable energy supply which is calculated at 374 PJ is very small. Onshore wind power and solar power have enough potential, evaluated at 2,985 PJ, to substitute thermal power plants. This study indicates that development of local energy systems, especially local heat supply system, is important to introduce local renewable energy, and introduction of renewable energy leads to more balanced regional energy demand-supply distribution.

Supply potential estimation and economic evaluation of carbon free hydrogen considering spatial information Peer-reviewed Ryota Katsumata, Takaaki Furubayashi, Toshihiko Nakata, Mitsuru Matsumoto Transactions of the JSME (in Japanese)　82　(842)　16-00119-16-00119　2016/10 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.16-00119 　 ISSN：1883-4736 More details Close In this study, we estimate supply potential of carbon-free hydrogen from wind power in Japan using spatial information such as wind speed and the land use. Then, hydrogen supply cost is revealed for every municipality in the Tohoku districts considering hydrogen production to distribution. The estimation indicates that the supply potential of carbon-free hydrogen in Japan is as much as 205 billion Nm³/year. With that amount of hydrogen a fuel cell vehicle can drive 3,030 billion km. When a high-pressure gas transport system is used for delivery of carbon-free hydrogen from each municipalities to Sendai city, the hydrogen supply cost ranges from 159.8 to 257.0 JPY/Nm³, and the average cost is 180.6 JPY/Nm³. If all cost component of carbon-free hydrogen supply system are replaced by the future cost target, the supply cost range decreases to 82.4~137.3 JPY/Nm³ and the average cost is 99.4 JPY/Nm³. The driving cost of fuel cell vehicle by this future hydrogen supply cost ranges 5.60~9.31 JPY/km and the average cost is 6.72 JPY/km. This cost is cheaper than 7.01 JPY/km of the internal combustion engine vehicle fueled with gasoline. Design of the sustainable energy system in a local area considering economic and resource circulation Peer-reviewed Minami Kikuchi, Takaaki Furubayashi, Toshihiko Nakata Journal of Japan Society of Civil Engineers, Ser. G (Environmental Research)　72　(6)　II_269-II_276　2016/10 Publisher: Japan Society of Civil Engineers DOI： 10.2208/jscejer.72.II_269 　 ISSN：2185-6648 More details Close  In Japan, fossil fuels imported supply about 90% of primary energy, which occurring large amount of CO₂ emission and outflow of domestic funds to other coutries. The objective of this study is to design the local energy system using local resources which can realize low emission and economic circulation in the area. The targeted area is Fukushima prefecture. First, the amount of energy resources in local area is estimated using GIS. Second, the energy system is optimized in terms of CO₂ emission and cost, then the system is evaluated from multi points of view which are economic effect, energy efficiency and resource diversity. As a result, it is concluded that if more wind energy and wood biomass used the CO₂ emissions will be decreased to almost 0 and economic ripple effect in the local area will be increased. A material flow of hydrogen from production to consumption Peer-reviewed KATSUMATA Ryota, FURUBAYASHI Takaaki, NAKATA Toshihiko, MATSUMOTO Mitsuru Transactions of the JSME (in Japanese)　82　(836)　15-00574-15-00574　2016/04 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.15-00574 　 ISSN：2187-9761 More details Close Hydrogen supply infrastructures such as hydrogen production and filling stations are expected to accelerate the penetration of fuel cell vehicles. This study focuses on a hydrogen material flow from the production to the consumption sector to discuss hydrogen supply potential in Japan. Both the hydrogen supply capacity and demands are investigated to estimate hydrogen sales and its self-consumption status based on the current data. The difference between the supply capacity and consumption quantity is defined as a surplus hydrogen capacity. Detailed estimation indicates that the surplus hydrogen capacity affords to supply high purity hydrogen up to 8,700 million Nm³ a year, which is equivalent to 3.3% of the final energy consumption in Japan&＃39;s transportation sector in 2012. Decentralised electricity generation system based on local renewable energy sources in the Honduran rural residential sector International-journal International-coauthorship Peer-reviewed Héctor F. Villatoro Flores, Takaaki Furubayashi, Toshihiko Nakata Clean Technologies and Environmental Policy　18　(3)　883-900　2016/03/01 Publisher: SPRINGER DOI： 10.1007/s10098-015-1067-x 　 ISSN：1618-954X eISSN：1618-9558 More details Close This article addresses the selection of electricity generation technologies for a decentralised electricity generation system based on local renewable sources for a rural area of a developing country (six municipalities in Western Honduras). In this work, rather than designing a high-reliable electricity generation system with high-quality power, our objective is to provide the basic configuration of an energy mix for a rural area for which energy data are not of high resolution. The selection of technologies is accomplished through a non-linear integer programming model that minimises the levelised cost of electricity (LCOE). The model uses as inputs information related to the energy resources, the conversion technologies, the Honduran economic framework, the electricity demand of the study area, and the energy storage cost. The evaluated energy resources are solar, wind, and local biomass, while the electricity generation technologies considered include solar photovoltaics, wind turbines, biomass direct combustion with a steam turbine, and biomass gasification with a gas engine. Three different case studies were proposed as functions of power capacity: off-grid, mini-grid, and grid-connected. For each case study, the model outputs are the electricity supply share for each technology, the LCOE, and the number of power plants with the respective power capacity required to satisfy the electricity demand of the study area. This work can serve as a reference for preliminary feasibility studies of electrification projects based on renewable energy sources for other rural areas in Honduras or in other developing countries. Integration of WTE technologies into the electrical system for low-carbon growth in Venezuela International-journal International-coauthorship Peer-reviewed Marisabel Cuberos Balda, Takaaki Furubayashi, Toshihiko Nakata Renewable Energy　86　1247-1255　2016/02/01 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.renene.2015.09.052 　 ISSN：0960-1481 eISSN：1879-0682 More details Close The present work intends to address the lack of energy access and low waste collection services through the integration of waste-to-energy (WTE) technologies into the electrical system, aiming for a low-carbon growth. A minimization of cost approach was applied using linear programming. Venezuela was used as the case study for five cases under two scenarios. In Scenario A, the current waste collection service rate was considered (88%), whereas in Scenario B, it was assumed to improve to 94%. Cases 1 to 5 were as follows: Current fuel subsidy, No fuel subsidy, Subsidies on WTE, Carbon tax policy and Carbon-reduction policy. Total carbon emissions were analysed. In all cases except for the first one, WTE technologies were present in the energy matrix, reducing carbon emissions by approximately 3-5.4 × 10 tonne of carbon. Furthermore, a difference of 1-2 × 10 tonne of carbon between scenarios was observed. The last two cases achieved higher emission reductions with an abatement cost of $169 tC and $89 tC , respectively. Despite the lower abatement cost of the carbon reduction policy, this research proposes the implementation of a carbon tax because it could finance the improvement of waste management practices. 6 6 -1 -1 A feasibility and performance assessment of a low temperature district heating system - A North Japanese case study International-journal International-coauthorship Peer-reviewed Ivar Baldvinsson, Toshihiko Nakata Energy　95　155-174　2016/01/15 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.energy.2015.11.057 　 ISSN：0360-5442 eISSN：1873-6785 More details Close This paper presents a high spatial resolution based method for design and operation of a low temperature district heating system and evaluates its feasibility and energy and exergy performance through case comparison. Selected case area is existing district in North Japan. The district heating system design and operation follows a bottom-up approach. The study scope takes into account the demand side, distribution and supply side where biomass CHP (combined heat and power) plant is selected as main supply source. Radiating floor heating system model is used to estimate building temperature requirement. Results indicate that low temperature heating is infeasible for non-residential buildings in North Japan at high loads. Improving building insulation decreases heating quality demand considerably. Low temperature district heating performs better than medium temperature, especially in terms of exergy efficiency, however requires a bit larger pipe diameter indicating cost trade-off between installation and operation cost. Implementing cascade configuration based on quality level of building energy demand results in highest system performance. Lower network temperature provides least net primary energy consumption primarily due to higher electricity generation of CHP plant. This transcends to favourable system exergy efficiency of low temperature operation due to high quality of electricity, increasing the exergy of the product. O-07 Wood biomass potential estimation based on the wood material flow FURUBAYASHI Takaaki, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　11　13-14　2016 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.11.0_13 　 ISSN：2423-8341 More details Close The purpose of this study is to estimate the woody biomass potential based on the wood material flow. The wood flow is drawn based on the statistic data from Japan&＃39;s Forest Agency and METI. Woody biomass potential is estimated using the timber volume in 2007 and 2012, and the wood material production. The timber volume in Japan is 2,658 million m^3 in 2007, and 3,048 million m^3 in 2012. And annual wood production is 14-15 million m^3/year. Thus, the forest growth amount is 93 million m^3/year, and the sustainable availability is 52.9 million m^3/year. Based on the wood material flow, the woody biomass availability for energy is 10 million m^3, higher heating value 72 TJ/year. Woody biomass potential estimation based on the wood flow in Japan Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata European Biomass Conference and Exhibition Proceedings　2016　(24thEUBCE)　200-203　2016 Publisher: ETA-FLORENCE RENEWABLE ENERGIES ISSN：2423-8341 eISSN：2282-5819 More details Close The purpose of this study is to make the wood flow in Japan, and to estimate the woody biomass potential. The wood flow is drawn based on the statistic data from Japan’s Forest Agency and METI. The domestic round wood, imported round wood, forest residue, energy wood, and construction waste are considered as supplied wood. In 2014, the domestic round wood 21 million m and the imported round wood 6 million m are consumed, and more than 30 million m wood products such as wood chips are imported. If all imported wood material is covered by domestic wood, the demand of round wood is increased to 77 million m . To the compare the demand potential with resource potential, woody biomass potential is roughly estimated using the timber volume increment and the wood material production from 2007 to 2012. In these 5 years, the amount of increasing timber volume is 390 million m , and annual wood production is 14-15 million m /year. According to this data, the annual forest growth amount is more than 80 million m . Therefore, in ideal situation, all wood resource demand in Japan can be covered by the domestic wood. 3 3 3 3 3 3 3 Integrated Assessment of Biomass Energy Systems Considering Effective Utilization of Resources Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Journal of the Japan Institute of Energy　95　(1)　111-122　2016/01 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.95.111 　 ISSN：0916-8753 More details Close The purpose of this study is to evaluate biomass energy systems based on both material and energy flows. The biomass energy system consists of 4 processes such as harvesting and collection, preprocessing, energy conversion, and waste treatment. As the conventional evaluation such as energy return on investment (EROI) is based on the amount of fossil fuel consumption, it shows the efficiency of inputted fossil fuel to form biomass derived fuels without biomass material flow. In this study, the effective utilization rate of resource is defined as the ratio of the difference between produced bio-fuel energy and consumed fossil fuel energy to the biomass resource energy, and the fossil fuel substitution rate is defined as the ratio of net substituted fossil fuel energy by the bio-fuel to the biomass resource energy. As a case study, the woody biomass utilization systems considering 7 preprocessing technologies and 4 energy conversion technologies are evaluated by using EROI and suggested values. It is shown that the effective utilization ratio of resource and the fossil fuel substitution rate can be small even if EROI is enough high. Analysis of Trade-offs Between First-generation Biofuels and Food Production for Japan Using CGE Modelling International-journal International-coauthorship Peer-reviewed Héctor Fernando VILLATORO FLORES, Takaak FURUBAYASHI, Toshihiko NAKATA The International Journal of Economic Policy Studies　11　(2016)　1-24　2016/01 DOI： 10.1007/BF03405763 　 More details Close Depending on the technology used to produce liquid biofuels, they can be classified into: first-, second-, and third-generation biofuels. The first generation uses as feedstock edible biomass such as corn and sugar cane, the second generation uses lignocellulosic biomass such as forest residues, and the third generation uses algae. The technologies employed to produce first-generation liquid biofuels are more developed and mature than those employed by the second- and third-generation. However, the fact that they use edible crops as feedstock leads to a debate about the negative impacts that this can cause in an economy, particularly over the prices of the food sector. This work joins this debate by analyzing the economic impacts that introducing ethanol produced from rice can cause in the Japanese economy. A comparative-static, multi-sector, Computable General Equilibrium (CGE) model is used to execute the analysis. The model simulates a neoclassical economy where producers maximize profits subject to technological constraints, and households maximize utility subject to budget constraints. It incorporates intermediate demands, has a government and an investment agent, and includes the rest of the world interacting with the economy through exports, imports, and transfers. Different case study scenarios have been set based on two criteria: the bioethanol production process and the gasoline-ethanol mix ratio. Among the bioethanol production processes, an only ethanol production system, and an ethanol and power production system are considered. For the gasoline-ethanol mix ratio the model includes a biofuel penetration rate parameter that represents how much of the gross output of the gasoline sector is replaced by the new biofuel. We run various simulations for different values of this biofuel penetration rate parameter (in a range from 5% to 85%) with the intention to cover all the common ethanol fuel mixtures standards. The relevance of the study is that understanding the consequences of introducing biofuels into an economy is crucial to be able to design a supportive policy that helps to enhance the positive effects and decrease the negative ones. Development and analysis of an energy flow considering renewable energy potential Peer-reviewed TAKITA Yuki, FURUBAYASHI Takaaki, NAKATA Toshihiko Transactions of the JSME (in Japanese)　81　(827)　15-00164-15-00164　2015/07/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.15-00164 　 ISSN：2187-9761 More details Close The purpose of this paper is to estimate the feasibility of a low-carbon society in Japan through developing an energy flow, carbon flow and cash flow. In addition to total primary energy supply (TPES) and final energy demand, the energy flow contains estimated renewable energy potential, energy services and energy losses. TPES in 2012 is estimated as 18.9 EJ, of which 17.9 EJ (= 17.9 ×10¹⁸ J)was supplied by fossil fuels. Total renewable energy potential is estimated as 21.2 EJ which is enough to meet Japan&＃39;s TPES. Wind energy has large potential of 18.3 EJ. As for demand sectors, the transportation sector has the largest energy losses, 2.62 EJ, due to low energy efficiency. Total CO₂ emission in 2012 was 1,223 Mt-CO₂, of which 956 Mt-CO₂ was emitted from both coal and petroleum. Coal is mainly supplied to electricity generation sector, and petroleum is supplied to transportation sector. Total payment for energy supply in final demand sector is estimated to be 41.9 trillion JPY. Total CIF price of 20.6 trillion JPY is paid to foreign countries due to imported fossil fuels. This study indicates that introduction of renewable energy and energy supply system transition, in particular of the transportation sector and electricity generation sector, leads to CO₂ reduction and revitalizes local economies. Wind energy, which has a great potential, is important to design a low-carbon society. Comparison Analysis Between Rice and Cassava for Bio-ethanol Production in Japan Considering Land Use Efficiency International-journal International-coauthorship Peer-reviewed Marisabel Cuberos Balda, Toshihiko Nakata, Takaaki Furubayashi The Asian Conference on Sustainability, Energy and the Environment　373-388　2015/06/23 More details Close ISSN: 2186-2311 A Multi-objective Analysis for a Quantitative Evaluation of National Energy Security International-journal Peer-reviewed Ryosei Sai, Takaaki Furubayashi, Toshihiko Nakata 38th IAEE International Conference　1　(1)　1-19　2015/05 More details Close Recently Japanese energy security has been unstable, therefore, it is an urgent task to propose an explicit scheme for improving energy security. The purposes of this study are threefold. First one is to establish a specific definition considering significant aspects of the energy security concept. Second one is to evaluate energy security quantitatively based on strategically selected criteria and the last one is to indicate a direction of energy policy towards a future highly secure energy supply system for Japan considering the economic feasibility by applying a multi-objective analysis. As a result, it is realized that the current energy system in Japan is inefficient from both energy supply cost and energy security perspectives, and the system is inferior compared to other developed countries. In order for Japan to improve its energy security level effectively, the expansion of the use of natural gas and renewable energy such as biomass is required. Design of woody biomass energy system considering wide area collection and application to coal co-firing in Tohoku area Peer-reviewed Takaaki Furubayashi, Keita Morigami, Toshihiko Nakata Transactions of the JSME (in Japanese)　81　(824)　14-00395　2015/04 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.14-00395 　 ISSN：2187-9761 More details Close The purpose of the study is to design a woody biomass energy system and application to coal co-firing, and to evaluate the system considering the three dimensions of energy, economic, and environmental impact. The study targets five types of woody biomass; forest wood residues, forest thinnings, sawmill wood residues, construction wastes and pruned branches of fruit trees. The system contains of collecting of biomass, transporting raw materials, producing wood fuels, transporting wood fuels, and coal co-firing. The study evaluates six cases that differ in wood fuel production location and the type of wood fuel. The results of case study show that the potential of the biomass resource is 37 PJ/year and the availability is 3.6 PJ/year in Tohoku area. The case that pellets produced at the resource generation points has the lowest amount of energy consumption 0.9 PJ/year, wood fuel supply cost 3.2 JPY/MJ and CO₂ emissions 0.66×10³ t-CO₂/year. It is also obtained that the drying process and transportation process have dominant effect on energy consumption and cost. Building Autonomous, Distributed Energy Systems in Disaster-Stricken Areas : How to Design Local Communities Peer-reviewed Toshihiko Nakata Research on Environmental Disruption　44　(3)　34-40　2015/01/25 Publisher: Iwanami Shoten ISSN：0918-7537 P-38 Optimal design of biogas cogeneration system considering spatial distribution of heat demand and biomass resource SUMITOMO Yuta, FURUBAYASHI Takaaki, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　10　123-124　2015 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.10.0_123 　 More details Close The purpose of this study is to design an optimum biogas cogeneration system considering spatial distribution of heat demand and biomass resource. In this research, mixed integer linear programming (MILP) is applied to design network layout for collecting biomass and supplying heat, and to optimize the operation strategy. To include spatial boundary constraint in this model, geographical information system (GIS) is used. The results indicate that district heating network connecting both single high demand site and residential buildings is optimal. In this case, energy profit ratio (EPR) becomes approximately 3.0 by use of poultry manure instead of sewage. P-36 Design of sustainable woody biomass supply chain applying mixed integer linear programming SATO Yuji, FURUBAYASHI Takaaki, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　10　119-120　2015 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.10.0_119 　 More details Close The purpose of this study is to design and analyze a woody biomass supply chain. Proposed supply chain consists of felling and collecting of a raw wood, pre-processing, and raw wood and wood fuel transport. In particular, the transport process includes two mobilities modes; three weight divided types of trucks, and railways. Applying mixed integer linear programming model provides optimal logging area, pre-processing plant location and capacity, and supply flow of raw wood and fuel. As a case study, we selected five prefectures with feasible forest in Tohoku area in Japan. Annual feasible amount of wood and shortest transport path are calculated with Geographic Information System (GIS). Optimized supply chain is evaluated in three dimensions; wood fuel supply cost, Energy Return on Investment (EROI), and Net CO_2 reduction amount. We examined three deferent cases, in the best case, 4 t truck, 10 t truck and 20 t truck can be used and unit supply cost of a pellet becomes 24,267 JPY/t as a result. Integrated evaluation of biomass energy system for fossil fuel substitution Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Papers of The 23Rd European Biomass Conference　1664-1669　2015 Publisher: ETA-FLORENCE RENEWABLE ENERGIES More details Close The purpose of this study is to evaluate the biomass energy system considering the effective utilization of resource for the fossil fuel substitution. Simple energy balance and energy return on investment (EROI) are used to conventional energy evaluation. However, the energy balance is depended on the system scale, and EROI cannot show the total system efficiency considering consumed biomass resource. In this study, the alternative evaluations are suggested. One is the effective utilization rate of resource that is defined as the energy balance divided by higher heating value (HHV) of biomass resource. Another is the fossil fuel substitution rate that is net substituted fossil fuel energy divided by HHV of biomass resource. As a case study, these values are evaluated using woody biomass, several types of preprocessing and energy conversion in Japan&＃39;s Tohoku area. It is obtained that the effective utilization rate of resource and the fossil fuel substitution rate show the total system efficiency clearly, and how to improve the system efficiency. Quantitative evaluation of national energy security by using multi-objective analysis Peer-reviewed Ryosei Sai, Takaaki Furubayashi, Toshihiko Nakata ICOPE 2015 - International Conference on Power Engineering　1　(ICOPE-15-1044)　1-12　2015 DOI： 10.1299/jsmeicope.2015.12._ICOPE-15-_29 　 More details Close As global energy demand increases, improving energy security is one of the main issues of energy related problems in Japan. Thus the purpose of this paper is to evaluate energy security quantitatively and imply the best energy resource mix for the Japanese sustainable energy system from the perspective of energy security with considering an economic perspective. This study is mainly divided into three parts; conceptualizing energy security, evaluating energy security through international comparisons, and obtaining pareto optimal solutions by solving a multi-objective analysis considering energy security and economic feasibility. GAMS is used for coding the multi-objective analysis called an augmented ϵ-constraint method (AUGMECON). The results show that the Japanese energy system has improved from 2000 to 2010 from the aspect of both energy security and supply cost, however, it is still inferior to those of other countries. In order to improve energy security, the increase of the use of renewable energy and natural gas instead of oil and coal is recommended, therefore, it is an urgent task to establish a stable supply system using renewable energy and expand high resilient gas pipelines. Analysis of food production and energy nexus through a model proposed for multifunctional farms considering land use efficiency International-coauthorship Peer-reviewed Marisabel Cuberos Balda, Takaaki Furubayashi, Toshihiko Nakata ICOPE 2015 - International Conference on Power Engineering　1　(ICOPE-15-1045)　1-12　2015 DOI： 10.1299/jsmeicope.2015.12._ICOPE-15-_30 　 More details Close Population and economic growth are expected to cause an increment of 37 % in world energy demand by 2040 and 60 % in food production by 2050. Simultaneously, rural population is abandoning farms, and cities are becoming mega cities. Therefore, a challenge of increasing agricultural land efficiency exists. Hence, a design of a multifunctional farm is proposed in this research, where food and energy is produced within farm boundaries. A linear programming model was developed with the objective of minimizing area, considering agricultural land and the area needed for energy technologies. A Business as Usual Scenario and another two were analysed. In Scenario 1 residues are feedstock of CHP and biofuel. Scenario 2 includes solar PV and wind turbines. A region in Japan was selected and compared with one in Colombia, in order to realise challenges for each. The results indicate that including different crops from the status quo could help achieving the goal of supplying high energy needs in less space; such is the example of cassava root in Japan for biofuel generation. If land use and crops are considered with the model proposed, biofuel production may not interfere with food security. Analysis of the introduction of biofuel from rice in Japan using a computable general equilibrium model International-coauthorship Peer-reviewed Hector Villatoro, Takaaki Furubayashi, Toshihiko Nakata ICOPE 2015 - International Conference on Power Engineering　1　(ICOPE-15-1055)　1-12　2015 DOI： 10.1299/jsmeicope.2015.12._ICOPE-15-_39 　 More details Close A Computable General Equilibrium (CGE) model has been developed and applied to Japan in order to analyze the economic impacts caused by the introduction of bioethanol produced from rice. Even though the analysis is done on a national level, the application of the model is regional. That is, Japan has been divided into nine geographical regions, and the model has been applied to each. For each region, a Social Accounting Matrix (SAM) has been prepared to be used as database for calibration of the model. Then, the introduction of bioethanol is simulated as a substitution of a fixed share of the petroleum sector using a penetration rate parameter. The model is then run for a wide range of this penetration rate parameter (from 5% to 100%) with the intention to cover all the common ethanol fuel mixtures. Results show that the major economic impact of the bioethanol introduction is on the rice sector, where the feedstock of the bioethanol comes from. This sector experiences an increase linearly proportional to the bioethanol penetration rate in its demand and price. Also, a negative economic impact on the food sector is observed, as it presents a decrease in its level of production due to the deviation of the rice now used to produce ethanol. Design of woody biomass supply chain for co-firing considering characteristics of bio-fuel Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata ICOPE 2015 - International Conference on Power Engineering　1　(ICOPE-15-1059)　1-12　2015 DOI： 10.1299/jsmeicope.2015.12._ICOPE-15-_42 　 More details Close This paper aims to design the woody biomass supply chain for co-firing in the coal power plant. The woody biomass supply chain consists of 4 processes; Collection, Resource transportation, Preprocessing, and Fuel transportation. Preprocessing is divided into two processes such as Drying and Fuel production. Sawmill residue, construction waste, forest residue, thinning residue, and pruning of fruit tree are treated as raw material. Wood chip, pellet, and torrefied pellet called black pellet are treated as bio-fuel. The transportation of raw material and bio-fuel is optimized by using Geographical information system (GIS). As a case study, the woody biomass supply chain in Tohoku region is designed. The potential of raw materials is 37 PJ/year, and the availability is 3.6 PJ/year. As all resource is utilized in power plant, the lowest amount of energy consumption is 0.9 PJ/year that the all raw material is consumed to produce the pellet in resource generation points. And the lowest cost is 40,000 JPY/t of black pellets that are produced in resource generation points. It is obtained that the drying process and raw material transportation are dominant on energy consumption and cost. Comprehensive evaluation of woody biomass firing in coal power plants Peer-reviewed Y. Ochi, M. Tamura, H. Fukushima, H. Kasai, T. Kozaki, T. Nakata Power Gen International 2014　1　(1)　1-7　2014/10/09 Allocating Optimum Aircrafts for Less Environmental Impacts and Future Carbon Emission Mitigation Peer-reviewed NAKATA Toshihiko, WATANABE Shogo, FURUBAYASHI Takaaki JOURNAL OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES　62　(5)　157-162　2014/10/01 Publisher: THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES DOI： 10.2322/jjsass.62.157 　 ISSN：1344-6460 More details Close The passenger amount of air transportation increased up to eight times during past 30 years. Due to the dramatically growth of aviation, CO₂ emissions from aircraft engine doubled during this period. Rapid growth of aviation sector would cause climate change, local air pollution and noise problem. In order to mitigate these environmental impacts of aviation, optimal aircraft operation is necessary. The goal for the research is set to formulate optimization model which can consider these environmental impact and to evaluate the mitigation by applying the model to domestic lines of Japan. This paper describes the airline fleet assignment problem including externalities of environmental impacts. The model explores optimal aircraft type, which minimizes social cost that is the sum of total operating cost and external cost of CO₂ and NO_x emissions. The results show optimal fleet assignment can mitigate environmental impact in some degree. However, it might be almost impossible to achieve the reduction target only by optimal fleet assignment. A comparative exergy and exergoeconomic analysis of a residential heat supply system paradigm of Japan and local source based district heating system using SPECO (specific exergy cost) method International-journal International-coauthorship Peer-reviewed Ivar Baldvinsson, Toshihiko Nakata Energy　74　537-554　2014/09/01 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.energy.2014.07.019 　 ISSN：0360-5442 eISSN：1873-6785 More details Close In this study an exergy and exergoeconomic evaluation of a heat supply system paradigm of Japan and a district heating system (DHS) is conducted from a single user perspective, providing cost-based information on the systems inefficiencies and improvement potential. A heat supply system of a case city is used as a paradigm for Japan and a DHS is modelled according to standard practice for the same city, integrating geothermal heat and local waste sources. The local resources can supply 21% of the design load and natural gas is used for supplying the rest. For the analysis a pre-design exergy analysis tool combined with the specific exergy cost method is applied. The DHS and Japanese paradigm system have exergy efficiency of 4.2% and 5.4% respectively. Due to thermo-economic synergy effect however, the DHS has lower unit exergy cost of space heating and domestic hot water of 508$/GJ and 273$/GJ compared to 686$/GJ and 726$/GJ of the Japanese paradigm system. The DHS has considerable performance improvement potential through reduced operation temperatures and effective use of combustion sources through co-generation. The unit exergy cost difference leaves margin for capital investment cost increase for decreasing exergy consumption of the DHS. Opportunities and barriers for CO2 emissions reduction in non-ferrous metals secondary production and semi-fabrication in developing countries International-coauthorship Invited Peer-reviewed J.. G. Palencia, T. Furubayashi, T. Nakata 2nd International Symposium on Energy Challenges and Mechanics (ECM2)　1　1-10　2014/08 More details Close It is necessary to improve the sustainability of the industrial sector in developing countries, particularly in the case of energy intensive industries. Energy efficiency improvement and fuel substitution with natural gas and low-CO2 electricity can reduce CO2 and pollutant emissions, energy losses, and improve working conditions. In this research, CO2 emissions reductions achievable with these two measures in non-ferrous metals secondary production and semi-fabrication were estimated; and the barriers that prevent their materialization discussed. A national scale bottom-up static linear programing optimization model was developed to assess the energy resource/end-use device allocation problem in non-ferrous metals secondary production and semi-fabrication; and used to study the case of Colombia, where low-CO2 electricity is available. Besides the base scenario, three alternative scenarios were considered, focusing on different priorities for decision making: (min. cost) minimizing total cost under energy resource and material demand constraints; (low CO2) minimizing CO2 emissions under energy resource and material demand constraints; and (min. CO2) minimizing CO2 emissions under energy resource constraints, except for natural gas and electricity, and material demand constraints. Results indicate that compared with current CO2 emissions of 62.5 kt-CO2/yr, minimum cost system configuration can achieve CO2 emissions as low as 17.7 kt-CO2/yr due to the improvement of energy efficiency; while the minimum CO2 emissions system configuration can achieve CO2 emissions as low as 7.7 kt-CO2/yr, using energy efficient electric devices; which are preferable over regenerative natural gas furnaces for electricity CO2 emission factors lower than 350 t-CO2/GWh. Similarly, pollutant emissions are also expected to decrease. Cost of CO2 avoided is negative in all the alternative scenarios, indicating the existence of ‘no-regret’ CO2 emissions reduction potential. Despite economic and environmental benefits of energy efficiency improvement and fuel substitution, it is considered that barriers such as uncertainty about energy resource price evolution, resource competition between energy use improvement projects and other projects, and lack of knowledge, among others prevent CO2 emissions reduction potential to be realized. Furthermore, it is necessary to improve the characterization of energy use in the industry with updated and detailed information, required to identify more accurately CO2 emissions reduction opportunities. Techno-economic assessment of lightweight and zero emission vehicles deployment in the passenger car fleet of developing countries International-journal International-coauthorship Peer-reviewed Juan C. González Palencia, Takaaki Furubayashi, Toshihiko Nakata Applied Energy　123　129-142　2014/06/15 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.apenergy.2014.02.059 　 ISSN：0306-2619 eISSN：1872-9118 More details Close The largest increment in the global light-duty vehicle fleet in the medium- and long-term will happen in developing countries. Advanced vehicles can outweigh increments in CO emissions of a growing vehicle fleet; however, cost remains a barrier for their diffusion. A stock turnover model of the passenger car fleet was developed to estimate the potential of advanced vehicle deployment for CO emissions reduction, and used in the case of Colombia. Vehicle types included internal combustion engine vehicles (ICEVs), battery electric vehicles (BEVs) and fuel cell hybrid electric vehicles (FCHEVs); using two glider types: conventional and lightweight materials-intensive. Five scenarios were considered: the base scenario that relies on conventional ICEVs, and four alternative scenarios targeting the penetration of (A) BEVs, (B) BEVs and lightweight vehicles, (C) FCHEVs, and (D) FCHEVs and lightweight vehicles. Deployment of BEVs and lightweight vehicles offers the largest cumulative well-to-wheel CO emissions reductions, 22.01% compared to the base scenario; with cost of avoided CO going from 930USD/t-CO avoided in 2020 to 31USD/t-CO avoided in 2050. Despite advanced vehicle deployment, gasoline will be the main fuel and iron and steel the main materials until 2050 in the Colombian passenger car fleet. © 2014 Elsevier Ltd. 2 2 2 2 2 2 Development of an energy-economic model with endogenous technological progress and feasibility study of CCS systems International-journal Invited Peer-reviewed Tomoya Kusunoki, Takaaki Furubayashi, Toshihiko Nakata, Takafumi Usui Heat Transfer - Asian Research　43　(4)　332-351　2014/06 Publisher: John Wiley and Sons Inc. DOI： 10.1002/htj.21078 　 ISSN：1099-2871 eISSN：1523-1496 More details Close The main objective of this research is to develop a bottom-up energy-economic model considering endogenous technological development. The designed model analyzes the feasibility of CCS technologies in the Japanese electricity market to derive an optimum carbon reduction scenario. Two factors, a learning curve based on learning-by-doing and public R&D investment, precede technological progress. The analysis is calculated with a set of scenarios, which is based on alternative assumptions for technological characteristics: chemical and physical carbon absorptive technology. From modeling estimation, we conclude that technological progress reduces the generation costs of conversion technologies with CCS, as a CCS system acquires an additional unit of installation. Generation cost with chemical absorption remarkably reduces its marginal unit cost through a learning mechanism. The supply fraction from a gas-fired power plant increases over the analytical time period. The introduction of CCS reduces carbon emission level 17% compared to the baseline scenario in 2050. Technological progress has little impact on the total system costs; however, learning-by-doing pushes the introduction of CCS into the market rather than into a R&D activity. Research and development efforts in the private sector or knowledge spillover are not modeled in the study; however, they have the potential to contribute to the mitigation of carbon emission as well. © 2013 Wiley Periodicals, Inc. The Impact of Learning-by-doing and Learning-by-searching on the Diffusion of Renewable Energy Technologies in the Japanese Electricity Sector Peer-reviewed Usui Takafumi, Furubayashi Takaaki, Nakata Toshihiko Review of Environmental Economics and Policy Studies　8　(1)　19-36　2014/03/28 Publisher: The Society for Environmental Economics and Policy Studies DOI： 10.14927/reeps.8.1_19 　 ISSN：1882-3742 More details Close The mitigation of climate change is thought by many to be a significant environmental concern. In order to mitigate the bulk of carbon emissions from the electricity sector, large market penetration of renewable energy technologies is a key research issue. The goal of the paper is to address the timing of public R&D investment for renewable technologies in the Japanese electricity sector. The model is cast as a dynamic bottom-up energy-system model and numerically optimized, minimizing a total system cost subject to an accumulated carbon emission constraint. Autonomous energy-efficiency improvement and two-factor learning curves describe the technological development process for each energy technology. With the two-factor learning curve, the model shows that the cost of electricity of renewable technologies can be reduced by up to 43% in the year 2100 if there is no constraint on public R&D budget. Renewable energy sources requires substantial R&D support in their initial phase of development; however, the investment pattern would switch to a path of reducing the amount after 2050. The budget of R&D investment is strictly limited; thus, an important policy objective is to design a dynamic investment schedule that will induce sustainable innovations for green technologies. Quantification of technological learning by R&D and its application for renewable energy technologies Peer-reviewed HAYAMIZU Shinnosuke, FURUBAYASHI Takaaki, NAKATA Toshihiko Transactions of the JSME (in Japanese)　80　(811)　TEP0042-TEP0042　2014/03/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/transjsme.2014tep0042 　 ISSN：2187-9761 More details Close The paper examines the effects of research and development (R&D) on the capital cost reductions and the introduction of renewable energy technologies, namely solar photovoltaics (PV) and wind technologies. The proposed model in the study deals with the dynamics of technological learning. Functional form is a new kind of three-factor learning curve as a function of the cumulative capacity and the knowledge stock accumulated by public and private R&D expenditures. An econometric analysis is used to identify the influence of the knowledge stock on the capital costs of renewable energy technologies. Moreover, the study clarifies the relationship between the cost reductions and the market penetration. If the expenditures for public and private R&D in 2010 are fixed until 2050, then the model predicts that the capital costs of solar PV systems in 2050 become $1,750 /kW. Sensitivities of the annual R&D growth rate for the technologies are tested. The model also provides important results that the increase by four times of R&D budgets is necessary in order to reach the cost reduction targets by the Japanese government. The proposed methodology herein is helpful for decision makers to forecast how the costs of renewable energy technologies will change, and thereby providing the basis for R&D planning. Design of EFB utilization system considering international transportation Peer-reviewed T. Furubayashi, T. Nakata Proceddings of the 1st Asian Conference on Biomass Science　1　(1)　94-97　2014/01/14 Design of District Heating System in Rural Area Considering Biomass Resource and Energy Demand Distribution Peer-reviewed Yuta Sumitomo, Takaaki Furubayashi, Toshihiko Nakata Energy and Resources　30th　(5)　1-11　2014 DOI： 10.24778/jjser.36.5_1 　 ISSN：1883-4736 More details Close In recent years, municipalities have started to develop their own energy plan. Therefore, a quantitative evaluation approach considering energy demand distribution is of benefit. In foreign countries, energy maps which visualize the demand distribution have been used to make an effective decision regarding energy planning. Over the past few years, several studies have analyzed using energy maps, but this approach has not yet been conducted on rural areas which are rich in energy resources. This paper presents the method for making energy map for rural town and applying energy map for designing a biomass district heating system considering pipe network heat loss and pumping power demand based on heat demand distribution. The case study was done for Mogami-cho, Japan. The results indicate the case of DHS connected with both high demand commercial buildings and single detached houses is economically competitive. And, the introduction of biomass based district heating system is recommended in the area with linear heat density of 4.2 GJ/m. Design of Automotive Bioethanol Supply Chain Using Mixed Integer Programming Peer-reviewed Kazuhiro Yoda, Takaaki Furubayashi, Toshihiko Nakata Journal of the Japan Institute of Energy　92　(11)　1173-1186　2013/11/29 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.92.1173 　 ISSN：0916-8753 More details Close The purpose of this research is to design an optimum automotive bioethanol supply chain in Japan. In this research, a mixed integer linear programming (MILP) model provides the optimal design of bioethanol supply chain with the objective of minimizing the cost of supply chain. Furthermore, the model can optimize biomass species, cultivation and traffic volume of biomass, locations and scales of the bioethanol production plants and traffic volume of bioethanol. The transportation cost of feedstock and bioethanol are optimized using Geographic Information System (GIS). Optimized supply chain is evaluated bioethanol production cost, energy profit ratio (EPR) and CO₂ reduction. Tohoku area was selected as a case study. The bioethanol production cost, which uses first generation bioethanol plant is 203 JPY/L, where first and second generation bioethanol plants are installed is 168 JPY/l, where first and second generation bioethanol plants are installed and technological development was considered is 92 JPY/L. EPR of each case are 1.66, 2.49 and 3.40, and CO₂ reduction are 277 kt-C, 288 kt-C and 305 kt-C, respectively. It is necessary to decrease cultivation cost of energy crops and increase bulk density of crop residue to reduce the bioethanol production cost, increase EPR and CO₂ reduction. Economic Ripple Effects of Bioethanol Production in ASEAN Countries: Application of Inter-regional Input-Output Analysis International-journal Peer-reviewed Yoji Kunimitsu, Kei Takahashi, Takaaki Furubayashi, Toshihiko Nakata Japan Agricultural Research Quarterly: JARQ　47　(3)　307-317　2013/07/01 Publisher: Japan International Research Center for Agricultural Sciences DOI： 10.6090/jarq.47.307 　 ISSN：0021-3551 More details Close Bioethanol has great potential to reduce greenhouse gas emissions, improve energy security, and help revitalize agriculture. Accordingly, an E10 policy that substitutes bioethanol for 10% of all gasoline consumed will be globally popular. The present study aims to analyze the economic effects of bioethanol production for an E10 policy in nine ASEAN countries (except Brunei), with efforts to minimize CO₂ emissions. We consider two self-sufficient bioethanol production policies, i.e. self-sufficiency within each country and that within the ASEAN region under the scheme of a production quota. The optimization model, based on Takahashi et al.²⁰, and the inter-regional Input-Output Table, as estimated from the GTAP-7 (Global Trade Analysis Project, ver. 7) database, are used for consistent policy evaluation. The results demonstrated initially that the E10 policy under the scheme of a regional production quota elicited about 20% more environmental and economic effects than self-sufficient production within each country. Second, Singapore, Japan, China and the USA increased their production through bioethanol plant construction and annual production, even though this study assumed they did not increase bioethanol production. Approximately half the total induced production emerged in these countries. Third, induced production in agriculture accounted for half the total induced production. Based on these merits, several policy implications relating to the E10 policy with policy coordination are discussed. Inventory analysis of woody biomass utilization system considering different types of pre-processing and energy conversion technologies Peer-reviewed Y. Furubayashi, T. Nakata 21th European Biomass Conference　1　(5CV.2.40)　1-8　2013/06/03 Feasibilitiy assessment of energy transition from a fossil fuel to local resource based heating system using thermoeconomic analysis International-journal International-coauthorship Peer-reviewed Ívar Baldvinsson, Takaaki Furubayashi, Toshihiko Nakata 36th IAEE International Conference　321A　1-10　2013/06 More details Close Space heating and domestic hot water account for about 50% of residential and commercial sector energy consumption in relatively cold climates. This energy service demand is generally met by fossil fuels causing considerable amount of GHG emissions. In Japan the supply system is mainly constructed of small scale, distributed, building based conversion units being supplied by imported fossil fuels or electricity. In addition to being carbon intensive and almost completely dependent on imported fossil fuel, space heating in residential sector of Japan has been estimated to have energy and exergy efficiency of 99.8% and 4.6%. The low exergy efficiency indicates bad utilization of the available energy content of the supply fuel because of a mismatch between quality levels of the supply fuels and energy service demand. Fuel transition or restructuring of the heat supply system matching the quality level of the energy demand while fulfilling acceptable levels of availability, affordability and environmental impact is therefore of great benefit. District heating system is a flexible heat supply system that can integrate various local heat resources and has proven to supply heat in an effective and cost competitive way.
The purpose of this study is to assess the feasibility of a district heating system integrating local, low carbon energy sources, providing space heating and hot water on a small-city scale as a comparison to conventional fossil fuel based heating system. Study area is Hirosaki city located in north of Japan with relatively high fossil fuel prices and high heat loads. An energy analysis of the existing system is conducted, disaggregating the consumption by type of fuel and type of energy service demand. The district heating system is designed in order to match peak load. Steady state thermoeconomic analysis considering peak load conditions is conducted for assessing and comparing the two systems. Performance and exergoeconomic parameters are used to evaluate and compare the systems. Available feasible resources in Hirosaki considered for the district heating system are waste wood, municipal solid waste incineration plant waste heat, sewage sludge and geothermal energy. Together they are able to provide about 17% of the peak load. The insufficiencies of local resources are assumed being supplied by natural gas boiler. Results indicate a considerable reduction in CO2 emissions and the thermoeconomic analysis indicates that low fuel cost and less exergy destruction compensate for the high capital investment cost required for transition to district heating system. Energy efficiency is higher of the reference system and exergy efficiency about the same for both systems at peak load. Analysis of CO2 emissions reduction potential in secondary production and semi-fabrication of non-ferrous metals International-journal International-coauthorship Peer-reviewed Juan C. González Palencia, Takaaki Furubayashi, Toshihiko Nakata Energy Policy　52　328-341　2013/01 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.enpol.2012.09.038 　 ISSN：0301-4215 eISSN：1873-6777 More details Close Industrial sector growth in developing countries requires the provision of alternatives to guarantee sustainable development. Improving energy efficiency and fuel switching are two measures to reduce CO emissions in the industrial sector, with natural gas and low-carbon electricity as the most feasible options in the short term. In this work, a linear programming optimization model has been developed to study the potential of energy efficiency improvement and fuel substitution for CO emissions reduction, at national level in the non-ferrous metals industry. The energy resource/end-use device allocation problem in secondary metal production and semi-fabrication has been modeled. Using this model, the particular case of Colombia, where low-carbon electricity is available, has been studied. By improving energy efficiency, energy use and CO emissions can be reduced significantly, 73% and 72%, respectively, at negative costs. Further CO emissions reductions, up to 88%, are possible with fuel switching to low-carbon electricity, increasing the costs for the energy system; however, cost reductions caused by energy efficiency improvement outweigh cost increments of fuel switching. Benefits achieved with fuel substitution using low-carbon electricity can be lost if hydropower is not available; in such a case, efficient natural gas-fired end-use devices are preferable. © 2012 Elsevier Ltd. 2 2 2 2 Energy use and CO2 emissions reduction potential in passenger car fleet using zero emission vehicles and lightweight materials International-journal International-coauthorship Peer-reviewed Juan C. González Palencia, Takaaki Furubayashi, Toshihiko Nakata Energy　48　(1)　548-565　2012/12 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.energy.2012.09.041 　 ISSN：0360-5442 eISSN：1873-6785 More details Close Introduction of ZEVs (zero emission vehicles) and lightweight materials in a conventional steel-intensive internal combustion engine vehicle fleet will affect energy consumption and automotive material requirements. We developed a bottom-up dynamic accounting model of the light-duty vehicle fleet, including vehicle production and disposal, with detailed coverage of powertrains and automotive materials. The model was used to study the potential for energy consumption and CO emissions reduction of ZEVs and lightweight materials in the Colombian passenger car fleet from 2010 to 2050. Results indicate that passenger car stock in Colombia is increased by 6.6 times between 2010 and 2050. In the base scenario energy consumption and CO emissions are increased by 5.5 and 4.9 times respectively. Lightweighting and battery electric vehicles offer the largest tank-to-wheel energy consumption and CO emissions reductions, 48 and 61% respectively, compared to 2050 baseline values. Slow stock turnover and fleet size increment prevent larger reductions. Switching to electric powertrains has larger impact than lightweighting on energy consumption and CO emissions. Iron and steel remain major materials in new cars. Aluminum consumption increases in all scenarios; while carbon fiber reinforced polymer consumption only increases due to fuel cell hybrid electric vehicle or lightweight vehicle use. © 2012 Elsevier Ltd. 2 2 2 2 Integrated design of biomass energy system considering various biomass resources and technologies International-journal Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata 20th European Biomass Conference　1　(5BO.9.1)　1-8　2012/06/19 Assessment of energy utilization in Iran&＃39;s industrial sector using energy and exergy analysis method International-journal International-coauthorship Peer-reviewed Sayyed Mohammad Sanaei, Takaaki Furubayashi, Toshihiko Nakata Applied Thermal Engineering　36　(1)　472-481　2012/04 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.applthermaleng.2011.11.002 　 ISSN：1359-4311 More details Close The purpose of this study is to assess the use of quality of energy in Iran&＃39;s industrial sector. The exergy analysis has been performed along with energy analysis, in order to gain deeper and more realistic understanding of the sector&＃39;s condition. Primary energy utilization from seventeen different industries has been considered for calculation of the exergy and energy efficiencies for each industry, and later for Iran&＃39;s industrial sector. The exergy efficiency is much lower than energy efficiency in all industries and also in the industrial sector. It is shown that based on the results from exergy analysis the priorities for efficiency improvement are different from that of energy analysis; this in turn suggests that exergy analysis as a proper tool for policy makers. The sources of energy degradation and the mechanisms which cause degradation of quality of energy have been identified. Moreover remedial actions for better utilization of quality of energy are proposed. The energy and exergy efficiencies for the entire industrial sector of Iran were approximated as 63% and 42%, respectively. The oil, iron and steel, plastic and cement industries are found to have the highest share in destruction of quality of total input energy to the industrial sector. The aluminum industry has the highest exergy efficiency of 52.5%. Mean entropic temperature is also proposed as a tool for understanding the degree of quality of energy required in each industry and consequently better quality matching which leads to better energy quality utilization. © 2011 Published by Elsevier Ltd. All rights reserved. Design of decentralized energy systems for rural electrification in developing countries considering regional disparity International-journal International-coauthorship Peer-reviewed Diego Silva Herran, Toshihiko Nakata Applied Energy　91　(1)　130-145　2012/03 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.apenergy.2011.09.022 　 ISSN：0306-2619 eISSN：1872-9118 More details Close Decentralized electrification using local resources can reduce regional disparity in rural and remote areas in terms of supply reliability and cost, as well as promote income generation. In this research an optimization energy model is introduced for designing decentralized energy systems using biomass for rural electrification in developing countries. Regional disparity is incorporated disaggregating electricity demand into urban, rural and remote areas. The model has been applied for designing a decentralized system using agricultural waste and forest biomass in a region in Colombia, South America. The resulting design includes biomass technologies in remote areas, reducing supply cost by 30% in this region. Using agricultural waste for electricity generation increases unit costs by 25% and reduces 15% of CO emissions compared to the current energy system. Using all biomass to meet current demand lowers the efficiency of the system, resulting in high system costs and emissions reduction. Reduction of disparity in electricity access among regions using local biomass needs to balance the increase in energy system costs and CO emissions reduction. For instance, using 30% of available biomass reduces 22% of system CO emissions, and provides 121USD/house/yr and 99 USD/house/yr of additional income in rural and remote areas, respectively. Design of the energy system considering regional disparity shows that fuel transportation costs and efficiencies of biomass conversion technologies have significant impact on system configuration and performance. © 2011 Elsevier Ltd. 2 2 2 Optimum design of district heating: Application of a novel methodology for improved design of community scale integrated energy systems International-journal International-coauthorship Peer-reviewed Sayyed Mohammad Sanaei, Toshihiko Nakata Energy　38　(1)　190-204　2012/02 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.energy.2011.12.016 　 ISSN：0360-5442 eISSN：1873-6785 More details Close The purpose of this paper is to present a new tool for design of integrated energy systems. The initial choice of the energy system components and the way they should interact is a crucial decision which the outcome of the design heavily relies on. Use of a physical law (instead of engineering judgment) as the basis of the decision making is the main advantage of the proposed approach over conventional approaches for design of community scale energy systems. The methodology has been implemented for design of a district heating system for an existing district in arid region of Iran. The optimum level of interaction between the energy system components has been identified by employing an optimization algorithm seeking to minimize the overall cost of the energy system. Some of the relative merits of the optimum design comparing to the present energy system are 17% increase of the exergy efficiency, 10.8% reduction in the amount of CO production per capita and 2% reduction in overall energy related costs. © 2011 Elsevier Ltd. 2 O-304 Design of integrated biomass utilization system considering various resources and technologies FURUBAYASHI Takaaki, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　8　28-29　2012 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.8.0_28 　 More details Close The purpose of this study is to design a biomass utilization system for different types of biomass resources, fuel production technologies, and energy conversion technologies. Evaluation of biomass utilization system has been studied considering single resource or technology. However, the evaluation methodology for different resources and technologies is not established yet. In this study, the biomass energy system has been modeled and integrated for several types of biomass resources and technologies. The system consists of 4 processes; Resource, Fuel Production, Energy Conversion, and Waste treatment. By using this model, energy balance, CO_2 emission, economic impact of the biomass energy system can be evaluated. Pb-304 Design of automotive bio-fuel supply chain considering economic and social aspects Yoda Kazuhiro, Furubayashi Takaaki, Nakata Toshihiko Proceedings of the Conference on Biomass Science　8　184-185　2012 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.8.0_184 　 More details Close The purpose of the research is to design an automotive bio-fuel supply chain considering economic and social aspects in Japan, and to evaluate its total cost, energy balance and CO_2emission. In this research, mixed integer linear programming (MILP) models make optimal design of bio-fuel supply chain with the objective of minimizing the total supply chain cost. The model can optimize biomass species, locations and scales of the bio-fuel production plants. The target of this case study is Tohoku area. In the case study, bio-ethanol from imported feed stock has price competitiveness with gasoline. Net energy balance and net CO_2 reduction of the supply chain using domestic feed stock is positive. The Analysis on Performance of Microalgae-based Biofuel Production System Considering Regional Climate Condition and Transportation Peer-reviewed Koji Ohshita, Takaaki Furubayashi, Toshihiko Nakata Journal of the Japan Institute of Energy　90　(11)　1047-1056　2011/11/30 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.90.1047 　 ISSN：0916-8753 More details Close Recently, the microalgae that can produce fats and hydrocarbons attracts a lot of attention as means to solve the issue of global warming. The purposes of this study are to design microalgae-based biodiesel fuel (BDF) production system using exhaust gas from thermal power plants and considering regional characteristics, and to analysis potential of the microalgae from the viewpoint of energy balance, CO₂ balance and fuel production cost. The system consists of five components: Culture, harvesting, extraction, transportation, conversion. In addition, the methodology of this study has three processes: Allocating microalgae culture plants and BDF production plants, optimizing transportation using Geographic Information System (GIS) with Network Analyst, and evaluating energy balance and CO₂ reduction of the system. Besides, to minimize BDF production cost, we change the number of BDF production plants and consider trade-off between transportation cost and BDF production plants costs. The result shows that microalgae-based BDF production system has high potential for CO₂ reduction and the possibility to competitive with the fossil fuel cost. Feasibility study of CCS introduction considering technological and economic dimensions -Energy system design based on technological learning International-journal Peer-reviewed Takafumi Usui, Takaaki Furubayashi, Toshihiko Nakata International Gas Turbine Congress 2011　1　(039)　1-8　2011/11/13 Optimization of International Bioethanol Supply in East Asia Peer-reviewed Kei Takahashi, Takaaki Furubayashi, Toshihiko Nakata, Yoji Kunimitsu Journal of the Japan Institute of Energy　90　(10)　963-971　2011/10/31 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.90.963 　 ISSN：0916-8753 More details Close In the production of bioethanol in Asia, developed countries such as Japan have the problems of high cost and a lack of resources, while Southeast Asian countries have substantial biomass production and export potential. The purpose of this study is to optimize the international supply of bioethanol in East Asia. A linear model is developed to estimate costs, energy consumption, and carbon emissions in three processes: cultivation, conversion, and international transport. In order to consider the regional characteristics of producing countries, biomass price, electric power generation, fertilizer usage, agricultural machine usage are incorporated into the model. Optimization based on linear programming is carried out with two objective functions: minimizing cost and minimizing carbon emissions. For each objective function, the amount of supply, economic efficiency, and carbon emissions are quantitatively analyzed in three cases. One is domestic supply case where each country supplies bioethanol to domestic market. Another is Asia supply case where Asian countries supply bioethanol with international supply. The other is Asia-Brazil supply case where Brazil is included in bioethanol supply in Asia. The average supply cost of bioethanol in Asia supply case with the objective function of minimizing cost is a quarter of that in domestic supply case. The carbon emissions reduction increases by international supply. Brazil has more than 50 % share in bioethanol production in both objective functions and contributes to the reduction of carbon emissions. Design of an optimal waste utilization system: A case study in St. Petersburg, Russia International-journal International-coauthorship Peer-reviewed Mikhail Rodionov, Toshihiko Nakata Sustainability　3　(9)　1486-1509　2011/09/08 Publisher: MDPI DOI： 10.3390/su3091486 　 ISSN：2071-1050 eISSN：2071-1050 More details Close Storing municipal solid waste (MSW) in landfills is the oldest and still the primary waste management strategy in many countries. Russia is the third largest methane (CH4) emitter country after USA and China, representing 5% of total global CH4 emissions from waste landfilling. Due to high economical growth, the amount of waste generated in Russia has risen sharply over the last ten years. However, waste management in Russia is mainly based on landfilling. In order to design an optimal MSW utilization system considering various aspects related to sustainable MSW management, a linear programming model was introduced for this research. The performance of the proposed MSW utilization system in the target area has been evaluated in light of energy, economic, and environmental (3Es) aspects, such as system net cost, annual energy generated from the waste, and the carbon dioxide (CO ) emissions of the system. St. Petersburg city was considered as the target area for the present analysis. The results show that the introduction of the proposed MSW system with energy recovery from waste along with a high level of material recovery has energy, environmental and economic benefits compared to the conventional treatment system. This paper emphasizes the importance of introducing waste treatment methods as an alternative to landfilling, and to improve recycling activities in Russia. © 2011 by the authors. 2 Impacts evaluation of an optimal solid waste utilization system introduction in St.Petersburg city, Russia International-coauthorship Peer-reviewed Mikhail Rodionov, Toshihiko Nakata Journal of Japan Society of Energy and Resources　32　(5)　17-23　2011/09 Publisher: Japan Society of Energy and Resources DOI： 10.24778/jjser.32.5_17 　 ISSN：0285-0494 More details Close This paper describes several benefits of the integration of designed optimal municipal solid waste (MSW) utilization system considering energy recovery options and present energy system. A linear programming model has been developed in order to analyse proposed municipal solid waste system, taking into account the 3E&＃39;s (energy, economic, and environment) aspects. The objective function of the model is to minimize the net cost of the system, under several constraints. A case study in St.Petersburg city, Russia, has been carried out for evaluation of proposed the MSW system. The results show that the introduction of an optimal MSW utilization system has energy, environmental and economic benefits compared with the present system. The proposed integrated system can produce 1,900 GWh/year of heat or 542 GWh/year of electricity in average, which can be supplied to the existing energy system. In addition, the system can reduce the amount of landfilled waste from 89% to 20%, and reduce total system&＃39;s CO₂ emission by more than 70%. Development of an Energy Economic Model with Endogenous Technical Progress and Feasibility Study of CCS Systems Peer-reviewed Tomoya Kusunoki, Takaaki Furubayashi, Toshihiko Nakata Transactions of The Japan Society of Mechanical Engineers Series B　77　(780)　1672-1686　2011/08/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.77.1672 　 ISSN：0387-5016 More details Close The main objective of the research is to develop a bottom-up energy-economic model considering endogenous technical progress, and to analyze the potential of CCS introduction among Japan&＃39;s electricity market in order to find out an optimum carbon reduction scenario into the future. On the basis of two-factor learning curve, both learning-by-doing and R&D functions drive technical progress in the model. The analysis is performed with a set of scenarios based on alternative assumptions for technical progress of carbon capture technologies: chemical absorption and physical absorption. As a result, technical progress decreases generation costs of power technologies with CCS systems resulting in the acceleration of additional CCS introduction. In addition, generation cost with chemical absorption notably decreases due to technical progress, and share of gas-fired power plant in total power generation increases. Thus, carbon emissions reduction reaches around 17% of total carbon emissions in 2050 under projected scenario, however, technical progress has little impact on total systems cost. Technical progress by learning-by-doing has a strong impact on CCS introduction than that of R&D. Moreover, unconsidered factors such as R&D effort in private sectors and spillover may push down possible carbon emissions as well. Quantitative Analysis of the Effects of Public R&D Expenditures on the Introduction of Photovoltaics with Technological Learning International-journal Peer-reviewed Shinnosuke Hayamizu, Takaaki Furubayashi, Toshihiko Nakata 34th IAEE International Conference　1　(1)　1-1　2011/08 More details Close This paper examines the effects of R&D on the introduction of PV systems with technological learning in Japan. The proposed model in this study describes how the costs of PV modules are affected by the technological knowledge stock accumulated by university, industry and government R&D expenditures. Moreover, this study clarifies the relationship between the cost reductions of PV modules and the market penetration of PV technologies. The focus in this analysis is on the capital costs of PV modules, rather than on the costs of electricity produced, to exclude influential but exogenous factors such as interest rates. Application of energy system models for designing a low-carbon society International-journal International-coauthorship Peer-reviewed Toshihiko Nakata, Diego Silva, Mikhail Rodionov Progress in Energy and Combustion Science　37　(4)　462-502　2011/08 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.pecs.2010.08.001 　 ISSN：0360-1285 eISSN：1873-216X More details Close Rising concern about the effect of greenhouse gas (GHG) emissions on climate change is pushing national governments and the international community to achieve sustainable development in an economy that is less dependent on carbon emitting activities - a vision that is usually termed a &＃34;low-carbon society&＃34; (LCS). Since the utilization of energy resources is the main source of GHG emissions, restructuring current energy systems in order to incorporate low-carbon energy technologies is essential for the realization of the LCS vision. Energy policies promoting the penetration of these technologies must view the role of energy in society as a system, composed of several energy resources, conversion technologies and energy demand sectors. The feasibility of the LCS in the future can be better understood by means of energy models. Energy models are valuable mathematical tools based on the systems approach. They have been applied to aid decision-making in energy planning, to analyze energy policies and to analyze the implications arising from the introduction of technologies. The design of the LCS requires innovative energy systems considering a trans-disciplinary approach that integrates multi-dimensional elements, related to social, economic, and environmental aspects. This paper reviews the application of energy models considering scenarios towards an LCS under the energy systems approach. The models reviewed consider the utilization of waste for energy, the penetration of clean coal technologies, transportation sector models as a sample of sectoral approaches, and models related to energy-for-development issues in rural areas of developing countries. © 2010 Elsevier Ltd. All rights reserved. Economic analysis on small-scale forest biomass gasification considering geographical resources distribution and technical characteristics International-journal Peer-reviewed Kenjiro Yagi, Toshihiko Nakata Biomass and Bioenergy　35　(7)　2883-2892　2011/07 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.biombioe.2011.03.032 　 ISSN：0961-9534 More details Close Biomass is getting the great interest in Japan, and the cabinet approved &＃34; Biomass Nippon Strategy&＃34; in 2002 to promote the utilization of biomass. Although various projects utilizing wood biomass for energy uses have started already, many of them utilize mainly waste wood. Forest biomass remains unutilized because of the high logistic cost and the small scale of resource generation at a site. Small-scale gasification is considered as a suitable technology for forest biomass, and more than 10 demonstration plants have started to be operated recently. This study analyzes the economic feasibility of the small-scale forest biomass CHP system with gasification technology in Japan.The authors have developed the BiRReT tool, which takes input data such as geographical resource distribution and scale merit information of the target technology, and analyzes the economics of bioenergy system in target region by finding the optimal conditions; namely plant size, plant location, the number of plants, and lower generation costs. A case study in Miyagi prefecture revealed the conclusion that the system with logging residue fuel has the economic feasibility if the capital cost and the resource price will decrease from the BAU case by technological learning in the future. On the other hand, thinned wood will not be utilized as a fuel for power plants due to high fuel production cost. It is also found by the tool analysis that the technology&＃39;s scale merit has stronger impact on power generation cost in the trade-off between scale merit and the transportation cost. © 2011 Elsevier Ltd. Potentials of GHG reductions from wastewater treatment for the CDM International-journal Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Science China Technological Sciences　54　(7)　1649-1654　2011/07 Publisher: SCIENCE PRESS DOI： 10.1007/s11431-011-4382-4 　 ISSN：1674-7321 eISSN：1862-281X More details Close The study aims to evaluate the potential of GHG (greenhouse gas) reductions by installing an anaerobic digester in a wastewater treatment facility in Southeast Asia. Then the break-even point of additional investment to reduce GHG is obtained by exchanging carbon price as emissions credits. In the project scenario, the wastewater treatment system has the digester, where methane (biogas) is produced and recovered. Compared with the baseline scenario, the biogas has calorific value to produce heat and electricity, and can substitute fossil fuels for power generation. The objective of the study is to define the relationship between CERs (certified emission reductions) and investment costs, and the beak-even point, finding out the dominant parameters in the system. Financial parameters such as capital costs and operating costs are considered to evaluate the investment costs. The result shows that the methane recovery reduces 54% of GHG emissions. Although the substitution of the biogas for the fossil fuels reduces only 6% of the GHG emissions, the electricity output can satisfy the electricity consumption. The results also show that the maximum CER credit is 73000 t-CO e/a, and the GHG reduction cost is 14 USD/t-CO e. © 2011 Science China Press and Springer-Verlag Berlin Heidelberg. 2 2 An Inventory Analysis of Sewage Energy System Peer-reviewed Yosuke Komuro, Takaaki Furubayashi, Toshihiko Nakata Journal of the Japan Institute of Energy　90　(3)　247-257　2011/03/31 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.90.247 　 ISSN：0916-8753 More details Close In this study, 13 types of sewage energy system are evaluated by using inventory analysis. Evaluation indexes are energy balance, greenhouse gas emission, and economic efficiency. The main equipment of those energy systems are three types of incineration, three types of solid fuel, two types of pyrolysis gasification, and five types of digestion. The range of evaluation is from sewage sludge to power generation. Inputs of those energy systems are electricity, city gas, light oil, and wood biomass, and outputs are production of electricity, CO₂ gas, and N₂O gas. The results from the viewpoint of energy balance show that only the systems with gasification furnace produce larger electricity generation than total consumption. The results about the greenhouse gas emission show that the lowest gas emission system is the system with solid fuel produced by drying. N₂O gas emitted by solid fuel is lower than the others. The results about the economic efficiency show that the lowest cost system is the systems with solid fuel because the construction cost that holds most of total cost is much lower than the other systems. Nuclear Energy Development in Japan Toshihiko Nakata Nuclear Energy Development in Asia: Problems and Prospects　2011 DOI： 10.1057/9780230306332_5 　 Economic Ripple Effects of Policy Coordination on Bio-ethanol Production and Trade in East Asia: Application of International Inter-regional Input-Output Analysis Peer-reviewed Yoji Kunimitsu, Kei Takahashi, Takaaki Furubayashi, Toshihiko Nakata Studies in Regional Science　41　(3)　635-650　2011 Publisher: JAPAN SECTION OF THE REGIONAL SCIENCE ASSOCIATION INTERNATIONAL DOI： 10.2457/srs.41.635 　 ISSN：0287-6256 eISSN：1880-6465 More details Close Bio-ethanol (BE) plays an important role in the reduction of greenhouse gas (GHG) emissions. Since East Asian countries face different economic and political situations and are located under different climatic conditions, GHG emissions, production costs and materials available for BE production differ, it is crucial to optimize production and trade of BE among East Asian countries by coordinating policies. This paper aims to show the economic merits of a policy coordination scheme for BE production and trade.
The East Asian inter-regional I/O table was estimated from the GTAP (Global Trade Analysis Project, ver. 7) database to calculate production induced by investment for plant construction and working expenditure of annual production. Two different scenarios, the self-sufficient production scenario and policy coordination scenario, were considered to achieve an E10 policy with minimization of total CO2 emissions. In each scenario, an optimal level of production and trade quantity were calculated by a linear programming model (Takahashi, et al., 2010).
The simulation results demonstrated that, first, the policy coordination scenario yielded a higher production as a benefit in the whole region than the self-sufficiency production scenario. Second, Japan and the USA greatly benefited from policy coordination even though the amount of their BE production increase was small. This is because these countries provide production machinery for plant construction and chemical materials for BE production. Third, BE production under policy coordination contributed to promoting pro-poor growth in the least developed countries such as Cambodia, Laos, Myanmar and Vietnam by improving agricultural production.
Therefore, policy coordination for BE production and trade is a beneficial idea for development of East Asian countries. Particularly, Japan as a member of East Asia should take an initiative by investing money. In addition, the inter-regional I/O analysis employed in this study is useful for showing the benefits to policy makers.

JEL Classification: C67, Q27, Q28, Q58, Q54 Modeling technological learning and its application for clean coal technologies in Japan International-journal Peer-reviewed Toshihiko Nakata, Takemi Sato, Hao Wang, Tomoya Kusunoki, Takaaki Furubayashi Applied Energy　88　(1)　330-336　2011/01 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.apenergy.2010.05.022 　 ISSN：0306-2619 More details Close Estimating technological progress of emerging technologies such as renewables and clean coal technologies becomes important for designing low carbon energy systems in future and drawing effective energy policies. Learning curve is an analytical approach for describing the decline rate of cost and production caused by technological progress as well as learning. In the study, a bottom-up energy-economic model including an endogenous technological learning function has been designed. The model deals with technological learning in energy conversion technologies and its spillover effect. It is applied as a feasibility study of clean coal technologies such as IGCC (Integrated Coal Gasification Combined Cycle) and IGFC (Integrated Coal Gasification Fuel Cell System) in Japan. As the results of analysis, it is found that technological progress by learning has a positive impact on the penetration of clean coal technologies in the electricity market, and the learning model has a potential for assessing upcoming technologies in future. © 2010 Elsevier Ltd. Inventory analysis of biogas utilization system in the wastewater treatment for the CDM Peer-reviewed Takaaki Furubayashi, Toshihiko Nakata Proceedings of the IASTED International Conference on Power and Energy Systems and Applications, PESA 2011　756　(051)　231-238　2011 DOI： 10.2316/P.2011.756-051 　 More details Close The purpose of this study is to evaluate GHG emission reduction and economic potential of wastewater treatment system by installing an anaerobic digester in Southeast Asia. Then the optimal investment to get GHG emission credit is obtained. In the advanced scenarios, the anaerobic digester is installed in the wastewater treatment system, and methane (biogas) is recovered and combusted. The biogas can be utilized for electricity generation and heat production, and can substitute fossil fuels. The objective of the study is to define the relationship between CER (certified emission reduction) credit and investment costs, and the optimal system by the calculation Internal Rate of Return (IRR). The result shows that the methane recovery and destruction reduces 63 % of GHG emissions from BAU scenario. The biogas utilization for energy has small effect on the GHG reduction. However, the income by energy production has large effect on the IRR. Thus, the IRR in the case that all biogas is utilized for electricity generation is 24%, and the IRR in the case that all biogas is utilized for heat production is 8%. The results of sensitivity analysis also show that the dominant parameter to increase IRR is capital cost. If the capital cost for heat production is half, the IRR is more than 40%. Technology assessment by applying an energy-economic model Invited Toshihiko Nakata Electrical Review　95　(6)　51-55　2010/06/10 Publisher: None ISSN：0285-5860 Design of Bioethanol Production System Utilizing Restorable Fallow Land Peer-reviewed Kei Takahashi, Naohiro Ohyama, Yuichiro Deguchi, Toshihiko Nakata Journal of the Japan Institute of Energy　89　(4)　355-363　2010/05/12 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.89.355 　 ISSN：0916-8753 More details Close Bioethanol is expected as a prospective alternative to fossil fuels for mitigating greenhouse gas emissions. The study aims to design bioethanol production system utilizing energy crops in restorable fallow land in Japan and evaluate system performance based on energy balances, costs, and carbon emissions. The energy system has three processes such as cultivation, transportation, and manufacturing. In the analysis, energy potential in the area is calculated considering crop species, yields, chemical components, available land areas, and conversion efficiency. Then, the system performance is derived focusing on a local prefecture as a case study. The result shows that sorghum is expected to have the highest energy potential in most regions except for northern prefectures, and the amount of bioethanol produced from crops in fallow land is estimated to be about 2 million kl. Net energy value reaches -1.09 to 15.9 MJ/l. The total cost producing bioethanol is 2.4 to 8.9 times higher than petroleum fuel on calorific value basis. It is concluded that it is important to improve the productivity of the cultivation process of energy crops and to design optimized energy system to meet social requirements in near future. Design of Biomass Co-firing System Considering Resource Distribution and Transportation Optimization Peer-reviewed Hitoshi Yamamoto, Toshihiko Nakata, Kuniaki Yabe Journal of the Japan Institute of Energy　89　(1)　42-52　2010/02/26 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.89.42 　 ISSN：0916-8753 More details Close Biomass resources have huge potential to secure energy supply in next decades with carbon neutral emissions. However, the resources itself are widely scattered diffusely throughout the country, and the capacity of utilization plant highly depends on the quantity of primary resources available. The study focuses on the equilibrium between resource supply and energy demand in Tohoku area in Japan, considering geographical distribution and transportation paths. Woody biomass and agricultural residues are introduced in the study as a co-firing fuel supplied to three coal power stations in Tohoku area. The biomass energy system is modeled and analyzed using both geographic information solver and the roadway condition data. In particular, resource supply such as biomass resource collection, preprocessing before transportation, storage, long distance transportation, and energy conversion to electricity, is modeled and introduced to the system. As a result of the model analysis, a supply curve of biomass resources is obtained, which shows a relationship between procurement cost for power supply and annual electricity production at coal power stations. The supply curve shows that an electricity of 4.3 × 108 kWh/yr can be supplied with the procurement cost of 10 JPY/kWh, and the maximum electricity reaches 12.7 × 108 kWh/yr with the procurement cost of 14 JPY/kWh. Shift to a low carbon society through energy systems design International-journal International-coauthorship Peer-reviewed Toshihiko Nakata, Mikhail Rodionov, Diego Silva, Joni Jupesta Science China Technological Sciences　53　(1)　134-143　2010/01 Publisher: SCIENCE CHINA PRESS DOI： 10.1007/s11431-009-0420-x 　 ISSN：1674-7321 eISSN：1869-1900 More details Close Concern about global warming calls for an advanced approach for designing an energy system to reduce carbon emissions as well as to secure energy security for each country. Conventional energy systems tend to introduce different technologies with high conversion efficiency, leading to a higher average efficiency. Advanced energy systems can be achieved not by an aggregate form of conversion technologies but by an innovative system design itself. The concept of LCS (low carbon society) is a unique approach having multi-dimensional considerations such as social, economic and environmental dimensions. The LCS aims at an extensive restructuring of worldwide energy supply/demand network system by not only replacing the conventional parts with the new ones, but also integrating all the necessary components and designing absolutely different energy networks. As a core tool for the LCS design, energy-economic models are applied to show feasible solutions in future with alternatives such as renewable resources, combined heat and power, and smart grid operations. Models can introduce changes in energy markets, technology learning in capacity, and penetration of innovative technologies, leading to an optimum system configuration under priority settings. The paper describes recent trials of energy models application related to waste-to-energy, clean coal, transportation and rural development. Although the modelling approach is still under investigation, the output clearly shows possible options having variety of technologies and linkages between supply and demand sides. Design of the LCS means an energy systems design with the modelling approach, which gives solution for complex systems, choices among technologies, technology feasibility, R&D targets, and what we need to start. © 2010 Science in China Press and Springer Berlin Heidelberg. Optimization of bioethanol production and transportation considering regional characteristics in east and southeast Asia International-journal Kei Takahashi, Yoji Kunimitsu, S. Ogawa, Y. Mori, Toshihiko Nakata Sixth Biomass-Asia Workshop　1　(1)　45　2009/11/18 Shift to a low carbon society through energy systems design International-journal International-coauthorship Invited Peer-reviewed Toshihiko Nakata, Michael Rodionov, Diego Silva, Joni Jupesta International Symposium on Low Carbon Technology　1　1-6　2009/09/15 Multi-objective assessment of rural electrification in remote areas with poverty considerations International-journal International-coauthorship Peer-reviewed Diego Silva, Toshihiko Nakata Energy Policy　37　(8)　3096-3108　2009/08 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.enpol.2009.03.060 　 ISSN：0301-4215 eISSN：1873-6777 More details Close Rural electrification with renewable energy technologies (RETs) offers several benefits to remote areas where diesel generation is unsuitable due to fuel supply constraints. Such benefits include environmental and social aspects, which are linked to energy access and poverty reduction in less-favored areas of developing countries. In this case, multi-objective methods are suitable tools for planning in rural areas. In this study, assessment of rural electrification with renewable energy systems is conducted by means of goal programming towards fuel substitution. The approach showed that, in the Non-Interconnected Zones of Colombia, substitution of traditional biomass with an electrification scheme using renewable energy sources provides significant environmental benefits, measured as land use and avoided emissions, as well as higher employment generation rates than diesel generation schemes. Nevertheless, fuel substitution is constrained by the elevated cost of electricity compared to traditional biomass, which raises households&＃39; energy expenditures between twofold to five times higher values. The present approach, yet wide in scope, is still limited for quantifying the impact of energy access improvements on poverty reduction, as well as for the assessment of energy system&＃39;s technical feasibility. © 2009 Elsevier Ltd. All rights reserved. Optimization of decentralized energy systems using biomass resources for rural electrification in developing countries International-journal International-coauthorship Peer-reviewed Diego Silva, Toshihiko Nakata 32nd IAEE International Conference　1　1-19　2009/06/23 P409 Design of co-firing system using woody biomass and agricultural residue in Tohoku area YAMAMOTO Hitoshi, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　4　154-155　2009 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.4.0_154 　 More details Close The purposes of this research are designing co-combustion system using woody biomass and agricultural residue in Tohoku area. This research has five processes: Developing GIS database of available amount of biomass and their distribution, designing biomass procurement and co-firing system including collecting, storage, preprocessing, and transportation of biomass, optimizing transportation distance using GIS network analysis, defining procurement range of each biomass considering two types of economic constraint boundary, evaluating amount of power production, economic feasibility, and CO_2 reduction effect of total system. Co-firing system has high potential for RPS. Analysis of the market penetration of clean coal technologies and its impacts in China&＃39;s electricity sector International-journal International-coauthorship Peer-reviewed Hao Wang, Toshihiko Nakata Energy Policy　37　(1)　338-351　2009/01 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.enpol.2008.09.045 　 ISSN：0301-4215 eISSN：1873-6777 More details Close This paper discusses policy instruments for promoting the market penetration of clean coal technologies (CCTs) into China&＃39;s electricity sector and the evaluation of corresponding effects. Based on the reality that coal will remain the predominant fuel to generate electricity and conventional pulverized coal boiler power plants have serious impacts on environment degradation, development of clean coal technologies could be one alternative to meet China&＃39;s fast growing demand of electricity as well as protect the already fragile environment. A multi-period market equilibrium model is applied and an electricity model of China is established to forecast changes in the electricity system up to 2030s. Three policy instruments: SO emission charge, CO emission charge and implementing subsidies are considered in this research. The results show that all instruments cause a significant shift in China&＃39;s electricity structure, promote CCTs&＃39; competitiveness and lead China to gain great benefit in both resource saving and environment improvement. Since resource security and environment degradation are becoming primary concerns in China, policies that could help to gain generations&＃39; market share of advanced coal-based technologies such as CCTs&＃39; is suitable for the current situation of China&＃39;s electricity sector. © 2008 Elsevier Ltd. All rights reserved. 2 2 Energy systems analysis of CCS feasibility with endogenous technological change Peer-reviewed Tomoya Kusunoki, Toshihiko Nakata Proceeding of International Conference on Power Engineering, ICOPE 2009　2　19-24　2009 Publisher: JAPAN SOC MECHANICAL ENGINEERS DOI： 10.1299/jsmeicope.2009.2._2-19_ 　 More details Close This research develops an energy-economic model with endogenous technological change. This model assumes a decrease of specific capital cost and O&M cost from technological change, and considers that technological experience is shared among the same component technologies. Furthermore, feasibility of CCS in Japan&＃39;s electricity sector is analyzed. The analysis is performed based on scenarios with alternative assumptions over technological change of CCS component technologies; carbon capture, transport, and injection technologies. As a result, technological change doubles CCS potential, and generation technologies with CCS can produce 10% of total power generation in 2030. In addition, CO reduction from CCS introduction is increased by half, and 16% of carbon emissions in 2030 are reduced. CCS introduction increases the total system cost by 3%. Technological change has little influence on the total system cost. Aggressive R&D effort for CCS might push reduction by 20% of carbon emissions in 2030. 2 Technology transfer of innovative distributed energy systems from developed to developing countries: An energy system model of Conventional Coal Power Plants in China? International-journal International-coauthorship Peer-reviewed Camiro Araya, Toshihiko Nakata 28th USAEE/IAEE North American Conference　1　(1)　1-10　2008/12/05 Assessment of access to electricity and the socio-economic impacts in rural areas of developing countries International-journal Peer-reviewed Makoto Kanagawa, Toshihiko Nakata Energy Policy　36　(6)　2016-2029　2008/06 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.enpol.2008.01.041 　 ISSN：0301-4215 More details Close The purpose of this study is to reveal relations between access to electricity and advancement in a socio-economic condition in rural areas of developing countries. Recently, multi-dimensional aspects of poverty, for example, economy, education, and health, has been increasingly focused on, and access to modern energy such as electricity is one possible solution. As a case study, we have analyzed unelectrified rural areas in Assam state, India. We have developed an energy-economic model in order to analyze the possibility of electrification through dissemination of electric lighting appliances as well as applied multiple regression analysis to estimate the socio-economic condition, a literacy rate above 6 years old, in the areas. As a result of the case study, the household electrification rate, the 1000 km road density, and sex ratio have been chosen as the explanatory variables of the literacy rate. Moreover, the model analysis shows that complete household electrification will be achieved by the year 2012. In combination with the multiple regression and model analysis, the literacy rate in Assam may increase to 74.4% from 63.3%. © 2008 Elsevier Ltd. All rights reserved. 2 The energy system analysis and forecasts of the Republic of South Africa International-journal Invited Peer-reviewed Juta Matsumoto, Toshihiko Nakata Industrial and Commercial Use of Energy Conference 2008　1　141-148　2008/05/26 Renewable technologies for rural electrification in Colombia: A multiple objective approach Invited Peer-reviewed Diego Silva Herran, Toshihiko Nakata International Journal of Energy Sector Management　2　(1)　139-154　2008/04/11 DOI： 10.1108/17506220810859132 　 ISSN：1750-6220 More details Close Purpose - This study aims to present preliminary results from an integrated evaluation of electricity supply systems for rural areas using renewable energy technologies by means of a multi-objective decision making method Design/methodology/approach - Goal programming is applied to obtain the optimal system configuration meeting the electricity demand, based on the location&＃39;s resource availability and taking diesel generation as the alternative of reference. The performance of the system is evaluated through four attributes: electricity generation costs, employment and two environmental impacts (CO emissions and land use). The model is designed for isolated rural area belonging to the non-interconnected zones of Colombia. Findings - Application of the method showed that biomass conversion technology has the highest potential and that renewable energy systems offer better performance than diesel generation. Reductions of more than 10 percent in unit electricity costs, land use rates and CO emissions can be achieved. Research limitations/implications - Inclusion of additional attributes and sensitivity analysis are matters of future research. Originality/value - The methodology used in this study is an alternative means to perform evaluation of electricity supply systems integrating several aspects of technology and which is flexible enough so as to enable the inclusion of a wider scope of interests towards energy access targets. 2 2 Quantitative analysis of energy-efficiency strategy on CO2 emissions in the residential sector in Japan - Case study of Iwate prefecture International-journal Peer-reviewed Shuichi Ashina, Toshihiko Nakata Applied Energy　85　(4)　204-217　2008/04 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.apenergy.2007.07.012 　 ISSN：0306-2619 eISSN：1872-9118 More details Close This study examines the economics of energy-efficiency strategies for reducing CO emissions in the residential sector in Japan from the perspective of regional characteristics. For this study, the residential sector in Iwate prefecture was selected as representative of rural areas in Japan. In order to promote purchases of energy-efficient consumer appliances, the prefectural government is presumed to reimburse purchasers a part of the cost difference between energy efficient and conventional appliances. This paper begins with a discussion of the prefecture&＃39;s financial support for purchasers of energy efficient appliances and assumes that the payments come from prefectural government funds. This paper then looks at the effect of a carbon-tax refund on the reduction of CO emissions. The results show that, if half of the households use energy-efficient appliances, then CO emissions in the residential sector in the year 2020 will decreases from the BAU scenario, 0.726 Mt-C to 0.674 Mt-C. However, the Iwate prefectural government expends $105 million annually, which is 1.5% of the total tax revenue in the year 2003. The carbon-tax refund effectively encourages further reductions in CO emissions. Under the $20/tC carbon tax, proposed by the Ministry of the Environment, the carbon-tax refund leads to a reduction in residential CO emissions from 0.726 Mt-C to 0.712 Mt-C. © 2007 Elsevier Ltd. All rights reserved. 2 2 2 2 2 Study on Economic Aspects and the Introduction of Clean Coal Technologies with CCS International-journal Peer-reviewed Haruki Yoshizaki, Toshihiko Nakata Journal of Power and Energy Systems　2　(3)　1016-1026　2008/03/31 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/jpes.2.1016 　 ISSN：1881-3062 More details Close The advantages of coal are the largest reserves among any other fossil fuels, and can be found in many places including some developed countries. Due to the weak energy security of Japan, it is necessary to use coal as an energy source. We have designed the detailed energy model of electricity sector in which we take both energy conversion efficiency and economic aspects into consideration. The Japan model means an energy-economic model focusing on the structure of the energy supply and demand in Japan. Furthermore, the most suitable carbon capture and storage (CCS) system consisting of CO₂ collection, transportation, storages are assumed. This paper examines the introduction of clean coal technologies (CCT&＃39;s) with CCS into the electricity market in Japan, and explores policy options for the promotion of CCT&＃39;s combined with CCS. We have analyzed the impacts of carbon tax where each fossil technology, combined with CCS, becomes competitive in possible market. CO₂ mitigation costs for all plants with CCS are detailed and compared. Research on Bio-Recycling in Agriculture, Forestry and Fisheries - Facilities and Systematization Team - Part 3: Research on Construction and Demonstration of Biomass Recycling System Y. Shinogi, K. Kameyama, M. Ueno, Y. Komiya, Y. Kawamitsu, K. kikuchi, Y. Touhe, Toshihiko Nakata Secretariat, Council of Agriculture, Forestry and Fisheries Technology, Ministry of Agriculture, Forestry and Fisheries Research results　466　(466)　144-150　2008/03/26 Optimal Design of Regional Biomass Utilization Systems Considering Technical Characteristics (Special Issue on Prospects for Biomass Utilization Technology) Invited Toshihiko Nakata Chemical Engineering　53　(2)　113-118　2008/02 Publisher: None ISSN：0387-1037 Optimal Design of Biomass Utilization System for Rural Area Includes Technical and Economic Dimensions Peer-reviewed Yasuki Morioka, Toshihiko Nakata IEEJ Transactions on Electronics, Information and Systems　128　(2)　176-183　2008/02/01 Publisher: The Institute of Electrical Engineers of Japan DOI： 10.1541/ieejeiss.128.176 　 ISSN：0385-4221 eISSN：1348-8155 More details Close In order to design optimal biomass utilization system for rural area, OMNIBUS (The Optimization Model for Neo-Integrated Biomass Utilization System) has been developed. OMNIBUS can derive the optimal system configuration to meet different objective function, such as current account balance, amount of biomass energy supply, and CO₂ emission. Most of biomass resources in a focused region e.g. wood biomass, livestock biomass, and crop residues are considered in the model. Conversion technologies considered are energy utilization technologies e.g. direct combustion and methane fermentation, and material utilization technologies e.g. composting and carbonization. Case study in Miyakojima, Okinawa prefecture, has been carried out for several objective functions and constraint conditions. Considering economics of the utilization system as a priority requirement, composting and combustion heat utilization are mainly chosen in the optimal system configuration. However gasification power plant and methane fermentation are included in optimal solutions, only when both biomass energy utilization and CO₂ reduction have been set as higher priorities. External benefit of CO₂ reduction has large impacts on the system configuration. Provided marginal external benefit of more than 50,000 JPY/t-C, external benefit becomes greater than the revenue from electricity and compost etc. Considering technological learning in the future, expensive technologies such as gasification power plant and methane fermentation will have economic feasibility as well as market competitiveness. Energy-efficiency strategy for CO2 emissions in a residential sector in Japan International-journal Peer-reviewed Shuichi Ashina, Toshihiko Nakata Applied Energy　85　(2-3)　101-114　2008/02 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.apenergy.2007.06.011 　 ISSN：0306-2619 eISSN：1872-9118 More details Close This study examines the economics of energy-efficiency strategies, for reducing CO emissions in a residential sector in Japan, from the perspective of regional characteristics. For this study, the residential sector in the Iwate prefecture was selected as representative of rural areas in Japan. In order to promote the purchases of energy-efficient consumer appliances, the prefectural government is presumed to reimburse purchasers a part of the cost difference between energy-efficient and conventional appliances. This paper begins with a discussion of the prefecture&＃39;s financial support for purchasers of energy-efficient appliances and assumes that the payments come from prefectural government funds. This paper then looks at the effect of a carbon-tax refund on the reduction of CO emissions. The results show that, if half of the households use energy-efficient appliances, then CO emissions in the residential sector in the year 2020 will decreases from the BAU scenario of 0.726 Mt-C to 0.674 Mt-C. However, the Iwate prefectural government expends $105 million annually, which is 1.5% of the total tax revenue for the year 2003. The carbon-tax refund effectively encourages further reductions in CO emissions. Under the $20/tC carbon-tax, proposed by the Ministry of the Environment, the carbon-tax refund leads to a reduction in residential CO emissions from 0.726 Mt-C to 0.712 Mt-C. © 2007. 2 2 2 2 2 Allocation and Introduction of Biomass Plants Considering Geographic Distribution of Livestock Manure Peer-reviewed Yoshinori Itoh, Toshihiko Nakata Journal of the Japan Institute of Energy　87　(1)　56-67　2008/01 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.87.56 　 ISSN：0916-8753 More details Close Since the law for concerning the appropriate treatment and promotion of utilization of livestock manure has come into effect in 2004 in Japan, the way of disposal of the manure causes serious waste management problem in rural areas. Production of biogas from the manure by anaerobic digestion is one of the promised technologies to reduce the amount of environmental effect, and to generate heat and electricity. Recently biogas power plants have been installed in rural areas, however, studies on the optimal allocation considering geographic distribution of livestock manure have hardly been investigated. The paper focuses on the optimal allocation of centralized biogas power plants and composting plants considering the distribution of the animal livestock at lower costs, introducing an optimization model and geographical information system. The study also analyzes the effect of the subsidy rate for construction cost on the optimal location of biogas power plants and composting plants. CO2 emissions mitigation policies and their effects on the Thailand energy system International-journal International-coauthorship Peer-reviewed Toshihiko Nakata, Matchantika Ratananakorn International Journal of Global Energy Issues　28　(2-3)　161-180　2007/11 DOI： 10.1504/IJGEI.2007.015873 　 ISSN：0954-7118 More details Close Thailand&＃39;s rate of energy consumption has been growing at a fast pace due to its economic development with a corresponding rapid increase in CO emissions. Given the widely accepted fact between CO emissions and climate change, mitigation policies in Thailand become an essential part. The analysis is aimed at studying the effects of Thailand&＃39;s CO emissions mitigation options on the energy system and at determining the possible CO emissions reduction. In the paper we analyse that the imposition of a carbon tax in the region $20/tonC could reduce CO emissions by 5% up to the year 2020. Copyright © 2007 Inderscience Enterprises Ltd. 2 2 2 2 2 Development of an Energy Economic Model Including Technological Learning and Feasibility Study of Clean Coal Technologies Peer-reviewed Takemi Sato, Toshihiko Nakata Energy and resources　28　(5)　335-341　2007/09/05 Publisher: Japan Societu of Energy and Resources ISSN：0285-0494 Can IGCC Gain Market Competitiveness by Considering the External Cost of Conventional Coal Power Plants in China? International-journal International-coauthorship Peer-reviewed Hao Wang, Toshihiko Nakata 27th USAEE/IAEE North American Conference　1　(1)　1-24　2007/09 Publisher: IAEE More details Close With nearly 10 % annual economic growth in the past two decades, China has already become the world’s second greatest energy consumer. While coal, accounting for 70 % of energy demand mix and 90 % of thermal electricity power generation by 2005, will continue to be the most important energy resource in China for a long time. How to meet the rapidly growing demand of electricity as well as considering the global need of mitigation of greenhouse gas (GHG), and eliminating other harmful pollutants due to conventional coal combustion such as SO2, NO2 and PM, will be a huge challenge to Chinese government. Integrated coal gasification combined cycle (IGCC) power plant is emerged as an attractive option for both economic development and environment improvement.
This research aims to evaluate the penetration of IGCC into China’s electric sector by considering the externalities. A multi-period market equilibrium model (META・Net approach) is applied and an energy model of China is established to forecast changes in the energy system up to the year 2032. Two scenarios are designed: Business as usual (BAU) scenario, Internalizing External Cost (IEC) scenario where external costs of conventional coal power plants are internalized and 15 % of IGCC’s capital cost is subsidized.
From the analysis, following results are obtained. IGCC does not penetrate into the market in a large scale in BAU scenario due to its relatively high capital cost. Moreover, results in IEC scenario indicates that by considering the external costs of conventional coal power plants and subsidy, IGCC gains much competitiveness in the electricity sector. Moreover, penetration of IGCC has great effect on emission mitigation. According to the results, it is revealed that IGCC will become an important technology for generating electricity in China and considering the externalities could be a considerable policy option for IGCC’s market penetration. Design of woody biomass energy system considering economics of scale and demand-and-supply equilibrium Peer-reviewed Yoshinori Itoh, Toshihiko Nakata Journal of the Japan Institute of Energy　86　(9)　718-729　2007/09 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.86.718 　 ISSN：0916-8753 More details Close Utilization of woody biomass represents an effective alternative to fossil fuels for mitigation of global warming. The purpose of the study is to design woody biomass energy system, and to analyze the effect on the total cost of the energy system and environmental impact derived by installing biomass power plant in rural area in Japan. The energy system consists of woody biomass, logistics, energy conversion, and distribution of both electricity and heat. In order to analyze the comprehensive network of the system, an energy-economic model is developed and applied for the rural area. The model considers the balance between energy conversion sectors and energy demand sectors in long-term taking into account the cost of biomass power generation, price of conventional energy, legal issues, and limits of quantity of biomass supplied in target area. In addition to the feature mentioned above, the energy-economic model derives the cost minimum configuration of the energy system because an open market is supposed in the energy model. As the conversion technology of biomass, direct combustion power plant, and gasified power plant are set in the energy conversion part in the woody biomass energy system; the economic and technological performance of the biomass power plants is evaluated circumstantially. A major issue of preventing woody biomass from the smooth installation is the high cost of biomass resource. Hence, the subsidy is supposed for decreasing the cost of woody biomass in the study, and the effect of the subsidy on the total cost and amount of woody biomass used in the energy system are also evaluated. Assessment of Energy Access Improvement and the Socio-Economic Impacts in Rural Areas of Developing Countries Peer-reviewed Makoto Kanagawa, Toshihiko Nakata Energy and resources　28　(3)　193-198　2007/05 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 More details Close The purpose of this study is to reveal relations between energy access improvement and poverty alleviation in rural areas of developing countries. Recently, multi dimensional aspects of poverty, for example, economy, health, and education, have been increasingly focused on, and access to modern energy such as LPG and electricity is one possible solution. As a case study, cooking and lighting demand of unelectrified rural areas in Assam state, India, has been analyzed. An energy-economic model has been developed to analyze possibility of energy access improvement through dissemination of a gas stove and electric lighting appliances for cooking and lighting demand, respectively. Moreover, we have estimated changes in the socio-economic conditions, the average Resipirable Suspended Particulate Matter (RSPM) exposure of women and a literacy rate above 6 years old, in the areas. For the cooking demand, the RSPM exposure will be reduced to below 190μg/m3, the WHO criterion of Suspended Particulate Matter (SPM), due to increase in the income level. For the lighting demand, it is shown that complete household electrification will be achieved by the year 2012 based on the model analysis, and the literacy rate in Assam will increase to 74.4% from 63.3%. Analysis of the energy access improvement and its socio-economic impacts in rural areas of developing countries International-journal Peer-reviewed Makoto Kanagawa, Toshihiko Nakata Ecological Economics　62　(2)　319-329　2007/04/20 Publisher: ELSEVIER DOI： 10.1016/j.ecolecon.2006.06.005 　 ISSN：0921-8009 eISSN：1873-6106 More details Close Access to modern energy is one of the most basic requirements for development. In rural areas of developing countries, there are a large number of people who do not have access to LPG and depend on traditional biomass such as wood, crop, and dung for cooking. In addition, energy has numerous and complex links with poverty reduction. Therefore, it is important to estimate the impacts of energy access improvement on socio-economic situation in the rural areas of developing countries quantitatively. This study focuses on socio-economic impacts of cooking demand through changes in stoves adopted by the rural households. We have developed an energy-economic model of rural areas in India to analyze the links between energy, income, and health hazard, applying both opportunity cost for using fuelwood and exposure to Resipirable Suspended Particulate Matter (RSPM). As a result of the analysis, there is a positive relation between the opportunity cost and the average RSPM exposure of women in the rural areas. Following to increase in the opportunity cost, that is, income, the cost of an improved wood stove becomes relatively lower first than that of a traditional wood stove, and then a gas stove attains price competitiveness. It is achieved that the average RSPM exposure is below the WHO and Japanese criteria for Suspended Particulate Matter (SPM), 190 and 100 [μg/m ], at the opportunity cost of US$9 and 15/GJ, respectively. © 2006 Elsevier B.V. All rights reserved. 3 Optimum system design for effective utilization of livestock manure in rural area Peer-reviewed Hideaki Kasai, Hiroki Morioka, Toshihiko Nakata Journal of the Japan Institute of Energy　86　(4)　256-264　2007/04 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.86.256 　 ISSN：0916-8753 More details Close A linear optimization model to design livestock manure disposal system has been developed. The model can design the most economically efficient disposal system under the restriction of nitrogen supply, which has to be less than nitrogen demand in agricultural land to prevent water and land pollution. The livestock manure considered in the model are dairy cattle, beef cattle, swine, and poultry excreta. The disposal facilities considered here are composting, carbonization, wet methane fermentation, dry methane fermentation and poultry manure boiler. The optimization model has been applied for case study focused on Tome-city with four scenarios, such as scenario 1; reference case, scenario 2; subsidy for biogas plant case, scenario 3; facilitation of organic fertilizer utilization case, and scenario 4; combination of scenario 2 and 3. In the reference case, because of low demand for organic fertilizer, much of the live stock manure is processed in carbonization facility and not utilized as compost or liauid fertilizer. The result indicates that the facilitation of organic fertilizer utilization is the best policy option to maximize economic efficiency. Moreover, the combination of subsidy for biogas plant and facilitation of organic fertilizer utilization is the best policy option for energy utilization of livestock manure. Implementation of decentralized renewable energy system using woody biomass in rural area in Japan Invited Peer-reviewed Yoshinori Itoh, Toshihiko Nakata 30th Conference of the International Association for Energy Economics　1　(CD-ROM)　1-10　2007/02/18 Application of a multi-objective decision making method for evaluation of renewable energy technologies for isolated rural areas of Columbia Invited Peer-reviewed Diego Silva Herran, Toshihiko Nakata 30th Conference of the International Association for Energy Economics　1　(CD-ROM)　1-10　2007/02/18 Economic Analysis on Small-Scale Forest Biomass Gasification Considering Regional Resource Distribution and Technical Characteristics Peer-reviewed Kenjiro Yagi, Toshihiko Nakata Journal of the Japan Institute of Energy　86　(2)　109-118　2007/02 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.86.109 　 ISSN：0916-8753 More details Close Small-scale wood biomass gasification is considered as a suitable technology to utilize forest biomass such as logging residue and unused thinned wood. Recently, more than 10 demonstration plants have started to operate to verify both technical and economic feasibility of the system. This study analyzes the economic aspect of gasification system focusing on the regional distribution of biomass resources and technical characteristics such as scale merit.
The authors developed BiRReT tool, which conducts the economic analysis of biomass energy system in a local region by finding the optimal conditions, namely plant size, plant location, and the number of plants. Case study in Miyagi prefecture had been carried out. Firstly, the economics of gasification system is compared with the steam-turbine-based CHP system that utilizes grate or fluidized-bed combustion technology. The result shows that gasification system has strong advantage in terms of low fuel transportation cost. Secondly, the economic feasibility of the system in a region is analyzed. The system with logging residue fuel has the possibility to gain economic competitiveness if technology learning and cost reduction will be seen in the capital cost and the fuel production process. Thinned wood will not be utilized only for the energy purpose. P412 Economical efficiency aspects of biofuel system considering fallow land OHYAMA Naohiro, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　2　136-137　2007 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.2.0_136 　 More details Close The purpose of this study is to analyze the economical efficiency of biofuel in the transportation sector of Japan. In the study, we considered several kinds of energy crops which are harvested in fallow land. At first, biofuel potential in fallow land was calculated from regional climate, yield, mineral and cultivating cost. Then we have analyzed the impact of transport cost and scale merit of the biofuel factory. In the case which capital cost of the plant is low and transport cost is high, making biofuel in multiple small-scaled plants is more economic than single large-scaled plant. P410 Optimal design of regional biomass utilization system considering technical and economic characteristics MORIOKA Yasuki, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　2　132-133　2007 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.2.0_132 　 More details Close An optimization model OMNIBUS is developed to design an optimal biomass utilization system for rural area. The model calcurate the optimal system configuration to meet economic feasibility considering energy output and CO_2 reduction. The model is applied to Miyakojima city and the optimal system structure is designed in three cases such as (1)basic case, (2)energy output increase case, (3)CO_2 reduction case. Study on economic aspects and the introduction of clean coal technologies with CCS Peer-reviewed Yoshizaki Haruki, Toshihiko Nakata Challenges on Power Engineering and Environment - Proceedings of the International Conference on Power Engineering 2007, ICOPE 2007　2　778-782　2007 Publisher: ZHEJIANG UNIV PRESS DOI： 10.1007/978-3-540-76694-0_145 　 More details Close The advantages of coal are the largest reserves among any other fossil fuels, and can be found in many places including some developed countries. Due to the weak energy security of Japan, it is necessary to use coal as an energy source. We have designed the detailed energy model of electricity sector in which we take both energy conversion efficiency and economic aspects into consideration. The Japan model means an energy-economic model focusing on the structure of the energy supply and demand in Japan. Furthermore, the most suitable carbon capture and storage (CCS) system consisting of CO collection, transportation, storages are assumed. This paper examines the introduction of clean coal technologies (CCT&＃39;s) with CCS into the electricity market in Japan, and explores policy options for the promotion of CCT&＃39;s combined with CCS. We have analyzed the impacts of carbon tax where each fossil technology, combined with CCS, becomes competitive in possible market. CO mitigation costs for all plants with CCS are detailed and compared. 2 2 Quantitative Analysis of Energy Efficiency Strategy on CO2 Emissions in the Residential Sector in Japan : Case Study in Iwate Prefecture Peer-reviewed Shuichi Ashina, Toshihiko Nakata Energy and resources　27　(6)　419-425　2006/11/05 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 Design of regional energy system with woody biomass in rural area in Japan International-journal Peer-reviewed Yoshinori Irtoh, Toshihiko Nakata Renewable Energy 2006　1　1-4　2006/10/12 Socio-economic impacts of energy poverty alleviation in rural areas of developing countries International-journal Peer-reviewed Makoto Kanagawa, Toshihiko Nakata 26th Annual North American Conference of the USAEE/IAEE　1　1-10　2006/09 Design for biomass energy systems with application to rural areas Invited Peer-reviewed Toshihiko Nakata Journal of Environmental Conservation Engineering　35　(6)　394-398　2006/06/20 Publisher: Society of Environmental Conservation Engineering DOI： 10.5956/jriet.35.394 　 ISSN：0388-9459 Economics and a Policy Option on Wood Pellet Fuel in Japan Peer-reviewed Kenjiro Yagi, Toshihiko Nakata Journal of the Japan Institute of Energy　85　(6)　451-460　2006/06/20 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.85.451 　 ISSN：0916-8753 More details Close Wood pellet has the potential to reduce dependency on fossil fuels, mitigate global warming and stimulate the forest industries. Economics of wood pellet and impact of carbon tax are examined in this study. The target of the study is space heating energy in the residential, commercial and public sectors in Japan. An energy-economic model in which space heating energy is supplied by wood pellet and kerosene is developed. The model contains market share functions that determine how many customers would choose wood pellet depending on the price competition between wood pellet and kerosene.
Model analysis shows the conclusions as follows. Without carbon tax, the pellet price should be less than 35JPY/kg for the market penetration. With 30, 000JPY/tC carbon tax, it becomes 45JPY/kg. Imposing carbon tax leads to an increase in the penetration of pellet except for the case where the pellet price stays at as high level as the current situation. It is also shown that the low cost wood collecting system can drastically increase the utilization of forest biomass such as logging residues and thinned wood in favorable situations. The policy scenario for dissemination of pellet is proposed based on the result of the analysis. Analysis of the impact of electricity grid interconnection between Korea and Japan - Feasibility study for energy network in Northeast Asia International-journal Peer-reviewed Makoto Kanagawa, Toshihiko Nakata Energy Policy　34　(9)　1015-1025　2006/06 Publisher: ELSEVIER SCI LTD DOI： 10.1016/j.enpol.2004.10.003 　 ISSN：0301-4215 More details Close This study analyzes the impact of an electricity grid interconnection between Korea and Japan on their energy systems. Both countries seriously consider energy security as the most important policy issue because of a lack of domestic energy resources. In addition, public concern for the environment is recently rising up in response to the global warming. Electricity grid interconnection has strong potential to cope with such complicated problems cost-effectively. We have developed the interconnection model, which includes the electricity grid interconnection between the electricity sectors of Korea and Japan, considering both technological and economic efficiency. The result of the study reveals the significant cost-effectiveness of the interconnection, in particular, under stringent condition such as nuclear phase-out in Japan and CO emission target in Korea and Japan. In the case that Japan&＃39;s nuclear power plants will be phased out, the interconnection attains further cost reduction of constructing substitutive thermal power plants. On the other hand, when Korea and Japan set a joint CO emission target, it achieves the emission target more efficiently than they reduce the emission individually. © 2004 Elsevier Ltd. All rights reserved. 2 2 Economic Analyses of Solid Waste Management to Improve Recycling and Minimize Landfills Peer-reviewed Toshihiko Nakata, Michiro Urabe Journal of the Japan Institute of Energy　85　(1)　49-57　2006/01/20 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.85.49 　 ISSN：0916-8753 More details Close In many countries, the concern with municipal solid waste (MSW) has been growing for the past few decades because of changes in lifestyle as well as constraints in waste disposal site. A remarkable increase in the amount of MSW has generated serious environmental impacts caused by pollutions such as fly ash, sludge, and dioxin etc. Waste management policies should be revised and updated in keeping with progresses in environmentally sound technologies.
The purpose of the study is to design the optimum NISW management system in Japan. We have derived an optimal system configuration among the various alternative and conventional disposal facilities for waste management by applying a NISW system model. which can consider both the mass flow of the wastes and economic aspects of system operation. The advanced MSW management system which has been proposed can reduce the amount of landfill in FY2010 by approximately 40% in comparison with the data in FY 2000. The system increases the recycling rate in FY2010 by 10% compared to FY2000, and meet the budget allocation for NISW management. In conclusion, the installation of alternative facilities in optimal system configuration has a potential for not only the reduction in the cost of landfill but also the improvement of recycling rate. P505 Design of renewable energy system and consideration of effective utilization of biomass in Morioka Regional Bureau in Iwate prefecture ITOH Yoshinori, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　1　154-155　2006 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.1.0_154 　 More details Close The study targeted an optimal design of renewable energy system including woody biomass for rural areas. In order to analyze the design of the system, an energy-economic model has been adopted which considers energy conversion technologies, fuel prices and demand for the target area. By analyzing the configuration of the system, some promotion methods of utilization of woody biomass in the target area are shown. The possibility of installing of gasification or direct-fired plant using woody biomass and positive effect of promoting of woody biomass will be discussed. P407 Applying energy crops to the transportation sector and its economic aspects OHYAMA Naohiro, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　1　144-145　2006 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.1.0_144 　 More details Close The purpose of this study is to analyze the economy of biofuel in the transportation sector of Japan. In the study, we considered several kinds of energy crops which are harvested in fallow land. At first, biofuel potential in fallow land was calculated from yield, mineral, and harvesting cost. Then we have analyzed the impact of imported and domestic biofuel together in the transportation sector, as well as apart. In the case which imported and domestic biofuels are consumed together, the following results were obtained: (a) the price of 10% biofuel is almost same as that of conventional fuel, (b) the reduction level of CO_2 is 5.3mmtC/year. P411 Economic analysis on wood biomass power generation considering distributed regional resources YAGI Kenjiro, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　1　152-153　2006 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.1.0_152 　 More details Close Utilization of forest biomass by small scale gasification technology is the target of the study. Firstly, it is very important to consider the distribution of scattered regional resources in this topic. Secondly, it is expected that gasification technology will reach the economically feasible state by learning effect as the technology breaks into the market. Authors developed BiRReT economic analysis tool, which employs resource distribution and technical characteristics in the economic analysis. Miyagi prefecture is selected as a test region to make an analysis with BiRReT tool, although the tool is applicable to any regions and even with any energy conversion technologies. P302 Business model of biomass energy utilization considering regional community SATO Soichi, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　1　134-135　2006 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.1.0_134 　 More details Close The purpose of this study is to promote effective use of biomass. By designing business model, the utilization of biomass could be advanced more than before. Livestock and food biomass are considered in the study. There is more biomass energy resources at both urban and the neighboring area than at local areas, because food biomass has higher heating value than livestock biomass. In order to establish biomass energy business, the following concepts are recommended: (a) using multiple biomass resources, (b) charging a gate fee, (c) reduction in the cost of construction. P406 Application system for livestock biomass in consideration of energy and material flows KASAI Hideaki, NAKATA Toshihiko Proceedings of the Conference on Biomass Science　1　142-143　2006 Publisher: The Japan Institute of Energy DOI： 10.20550/jiebiomassronbun.1.0_142 　 More details Close This paper presents an application system for animal waste as a biomass resource. A simulation model considering several disposal ways, compost, carbonizing, and methane fermentation, to optimize an application system is designed. Energy and material flows based on each disposal are considered in order to evaluate characteristics of material recycle and energy recovery. Some integrated disposals which combine methane fermentation with compost or carbonizing is also considered in order to reduce disposal residues. In this study, the impact of subsidy for a disposal system has clarified and strategies for sustainable society has discussed. Current status and problems of biomass energy utilization Invited Toshihiko Nakata, Yukihiro Suzuki Current advances in materials and processes　19　(4)　668-669　2006 ISSN：0914-6628 Feasibility Study of Integrated System Operation for Electricity Sector in Japan Peer-reviewed Shuichi Ashina, Toshihiko Nakata Energy and resources　26　(6)　421-427　2005/11/05 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 Feasibility Study for Renewable Energy Systems Having Biomass with Application to Rural Area in Japan Peer-reviewed Manabu Tada, Toshihiko Nakata, Hiroaki Niitsuma, Hiroshi Asanuma Energy and resources　26　(6)　428-434　2005/11/05 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 Feasibility study for renewable-hydrogen systems with application to rural area in Japan International-journal Peer-reviewed Manabu Tada, Toshihiko Nakata 25th Annual North American Conference of the USAEE/IAEE　1　1-10　2005/09/18 Analysis of the energy access improvement in developing countries through rural elecrification International-journal Peer-reviewed Makoto Kanagawa, Toshihiko Nakata 25th Annual North American Conference of the USAEE/IAEE　1　1-10　2005/09 Economics of energy-saving measures in the residential sector in Iwate prefecture International-journal Peer-reviewed Shuichi Ashina, Toshihiko Nakata 7th IAEE European Conference　1　1-27　2005/08/28 More details Close CD-ROM Optimal design and economic effects of renewable energy system for effective utilization of animal manure and wood biomass in rural areas in Japan International-journal Peer-reviewed Yoshinori Itoh, Toshihiko Nakata International Energy Workshop 2005　1　1-10　2005/07 Renewable energy policy analysis in Japan: A simulation with a computable general equilibrium model International-journal Peer-reviewed Takemi Sato, Toshihiko Nakata International Energy Workshop 2005　1　1-10　2005/07 Analysis of the energy access improvement and its socio-economic impacts in rural areas of developing countries International-journal Peer-reviewed Makoto Kanagawa, Toshihiko Nakata International Energy Workshop 2005　1　1-10　2005/07 Strategy for reducing CO2 emissions in the residential sector in Japan: Case study on energy saving measures in the residential sector in Iwate prefecture International-journal Peer-reviewed Shuichi Ashina, Toshihiko Nakata International Energy Workshop 2005　1　1-10　2005/07 Learning curve of wind power generation in Japan International-journal Peer-reviewed Takemi Sato, Toshihiko Nakata 28th Annual IAEE International Conference　1　1-10　2005/06 The role of geothermal energy in the locally distributed renewable energy system International-journal Peer-reviewed Hiroshi Asanuma, Hiroaki Niitsuma, Toshihiko Nakata, Y. Niibori, Hirokazu Moriya, Y. Komaniwa Proceedings World Geothermal Congress 2005　1-3　2005/04 Design for renewable energy systems with application to rural areas in Japan International-journal International-coauthorship Peer-reviewed Toshihiko Nakata, Kazuo Kubo, Alan Lamont Energy Policy　33　(2)　209-219　2005/01 Publisher: ELSEVIER SCI LTD DOI： 10.1016/S0301-4215(03)00218-0 　 ISSN：0301-4215 More details Close This study uses optimization modeling to study efficient ways to integrate renewable energy systems to provide electricity and heat in rural Japan. The model provides minimum cost system configuration and operation taking into account hour-by-hour energy availability and demand. Grid electricity is available to rural areas of Japan, but it is relatively expensive. Local renewable energy generation can be economic while using grid electricity to compensate for the intermittency of the renewable generation. In the model, renewable electricity can be provided by a combination of wind, photovoltaic, and biomass. Heat can be provided by petroleum, LPG, and geothermal heat pumps (GHPs). We find that due to the relatively high cost of grid electricity, there is significant penetration of wind generation. In turn, the penetration of wind creates economic conditions that encourage GHP penetration. The integrated renewable system reduces the annual cost of the entire system by 31%, and reduces the carbon emissions by 50%. © 2003 Elsevier Ltd. All rights reserved. Design of Energy System Introducing Biomass Resources for a Rural Area Peer-reviewed Kazuo Kubo, Toshihiko Nakata Journal of the Japan Institute of Energy　83　(12)　1013-1020　2004/12/20 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.83.1013 　 ISSN：0916-8753 More details Close The study focuses on the design of renewable energy systems introducing biomass resources for a rural area in Japan. In an energy-economic model, woody biomass and animal manure (livestock and poultry manure) have been introduced to supply stable power, combining with wind and PV etc. Intermittency of climate conditions and the changes in demand of electricity are carefully considered to examine cost effec-tive systems for the area. As a result, we have found that gasification of woody biomass can supply electric-ity at a reasonable cost, and the biogasification of animal manure becomes cost effective provided inverse onerous contract of the waste is available. The renewable energy system reduces the carbon emissions by 65%, and reduces the annual cost of the entire system by 15%. Economic and environmental analysis of biomass energy system for rural areas in Japan International-journal Peer-reviewed Yoshinori Itoh, Toshihiko Nakata International Workshop on Innovative Anaerobic Technology　1　(1)　83-86　2004/12/02 The economic aspects and policy options of clean coal technologies International-journal Invited Peer-reviewed Toshihiko Nakata, Ryo Kinugasa IAEE Newsletter　13　(4)　7-11　2004/10 Economic Analysis of Sustainable Waste Management in a Municipal Government Peer-reviewed Michiro Urabe, Toshihiko Nakata Energy and resources　25　(5)　354-359　2004/09/05 Publisher: None ISSN：0285-0494 Design and economic analysis of an optimum waste management system International-journal Peer-reviewed Michiro Urabe, Takemi Sato, Toshihiko Nakata World Renewable Energy Congress 8　1　1-10　2004/09 Economics and policy options for introducing woody biomass energy in Japan Peer-reviewed K. Yagi, T. Sato, T. Nakata World Renewable Energy Congress 8　1　1-10　2004/09 Strategy for sustainable energy system with biomass resources Peer-reviewed K. Kubo, Y. Ito, T. Nakata, H. Niitsuma World Renewable Energy Congress 8　1　1-10　2004/09 The economic effects of renewable energy system in a rural area Peer-reviewed Y. Ito, T. Nakata World Renewable Energy Congress 8　1　1-10　2004/09 Biomass based energy system for a rural area in Japan International-journal Peer-reviewed Toshihiko Nakata International Energy Workshop 2004　1　1-2　2004/06 Design for Renewable Energy Systems with Application to Rural Area in Japan Peer-reviewed Kazuo Kubo, Toshihiko Nakata Energy and resources　25　(2)　143-148　2004/03/05 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 Input-output analysis for installing renewable energy systems Peer-reviewed Yoshinori Itoh, Toshihiko Nakata Energy and Environment　15　(2)　271-282　2004/03 Publisher: SAGE Publications Inc. DOI： 10.1260/095830504323153469 　 ISSN：0958-305X More details Close Renewable energy facilities have been installed in many regions, because of their possibility to be an alternative to fossil fuels for mitigating global warming. Besides the profitability of renewable energy businesses, indirect economic effects of installing renewable energy facilities should be clarified. This study examines the possibility that the renewable energy facilities give renewed impetus to regional economic progress. The economic effects are analysed with input-output techniques in a rural area in Japan. As a consequence, both positive and negative effects on the rural economy are derived. In addition, we will focus on the changes in sectors such as construction, business services, banking, etc. as a result of economic activities for renewable systems. The business benefits of renewable energy system are discussed. Design of a local energy system using biomass resources Toshihiko Nakata MMIJ Quartery　2004　2004 ISSN：0919-7915 Energy-economic models and the environment International-journal Invited Peer-reviewed Toshihiko Nakata Progress in Energy and Combustion Science　30　(4)　417-475　2004 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/j.pecs.2004.03.001 　 ISSN：0360-1285 More details Close The current century - an era of environmental awareness - requires energy resources to satisfy the world&＃39;s future energy demands. We can use current energy use scenarios to help us to understand how energy systems could change. Such scenarios are not an exercise in prophecy; rather they are designed to challenge our thinking in order to make better decisions today. The conventional modeling approach tends to extrapolate changes in energy consumption from historical trends; however, technology innovation sometimes causes drastic reforms in energy systems in the industrial, commercial, residential and transportation sectors. The economic aspects are another key issue to be considered in order to understand future changes in energy systems. The quantity of the energy supply is set to meet the price of the energy demand of end users. This occurs on the condition that the price of the energy supply equates with the price on the demand side under the market mechanism. This paper reviews the various issues associated with the energy-economic model and its application to national energy policies, renewable energy systems, and the global environment. © 2004 Elsevier Ltd. All rights reserved. Input-output analysis for installing renewable energy system Peer-reviewed Y. Itoh, T. Nakata The European Network for Energy Economics Research　70-74　2003/10 Assessing the impacts of shutdown of TEPCO&＃39;s nuclear power on CO2 emission in the Japan&＃39;s electricity sector Peer-reviewed S. Ashina, T. Nakata 23rd IAEE North American Conference (CD-ROM)　1-10　2003/10 Energy and economic optimization of waste management systems Peer-reviewed T. Nakata, M. Urabe 23rd IAEE North American Conference (CD-ROM)　1-10　2003/10 EIMY (Energy In My Yard)-a concept for practical usage of renewable energy from local sources International-journal Peer-reviewed Hiroaki Niitsuma, Toshiko Nakata Geothermics　32　(4)　767-777　2003/08 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/S0375-6505(03)00056-7 　 ISSN：0375-6505 More details Close A group was set up to devise a strategy for geothermal development that conforms with global environmental expectations for the 21st century. The group developed the concept of EIMY-Energy In My Yard, which proposes that local energy demands should be met by an optimum combination of local, renewable sources to the maximum degree permitted by technical and economic considerations. Shortfalls and surpluses in local energy production would be accommodated by interfacing with the national grid. The group also discussed the roles that the various types of renewable energy could play within the EIMY framework, according to their nature, ubiquity, and capacity. An integrated renewable energy simulator was used to identify optimum combinations of sources for different situations. Installation and operating costs were assigned at current market rates without weighting for advantages such as low CO emissions. The results demonstrated that integrated renewable energy systems are cost-effective in the medium and long term. Geothermal energy plays a key role as a source of heat in such systems. © 2003 CNR. Published by Elsevier Ltd. All rights reserved. 2 Energy modeling on cleaner vehicles for reducing CO2 emissions in Japan International-journal Peer-reviewed Toshihiko Nakata Journal of Cleaner Production　11　(4)　389-396　2003/06 Publisher: ELSEVIER SCI LTD DOI： 10.1016/S0959-6526(02)00061-6 　 ISSN：0959-6526 More details Close This study is to evaluate the impact of cleaner vehicles on energy systems and CO emissions in the transportation sector in Japan. The transportation sector has the characteristic of spending petroleum. Even when the cost of petroleum rises, conventional vehicles cannot switch fuels to alternative energy right away. Cleaner vehicles, such as fuel cell vehicles, would be one of the alternative technologies in the transportation sector. It is supposed to have excellent performance in fuel efficiency and has strong possibility to reduce CO drastically. This paper uses a multi-period market equilibrium model to explore the impacts of cleaner vehicles on the passenger transportation sector in Japanese energy system out to the year 2040. A Btu tax is tentatively imposed to evaluate the effect of fuel cost on energy consumption in the transportation sector. Financial parameters such as capital cost and operating cost are considered to summarize the profit in taxation case. The result of this study shows that fuel cell vehicles have a great effect on reducing CO emissions especially when Btu taxes are imposed, which in turn has the advantage of encouraging a more diverse set of technologies and fuels. The analysis that petroleum consumption can be reduced using fuel cell vehicles will have effects on perspectives on energy systems in Japan. © 2002 Elsevier Science Ltd. All rights reserved. 2 2 2 Study on the economic aspects and policy options of clean coal technologies Peer-reviewed T. Nakata, R. Kinugasa Proceedings of the 26th IAEE International Conference (CD-ROM)　1　(1)　1-10　2003/06 Design for an optimum energy system having small nuclear power in Japan Peer-reviewed T. Nakata, S. Ashina Proceedings of the 26th IAEE International Conference (CD-ROM)　1　(1)　1-10　2003/06 Analysis of the impact of technological innovation to reduce CO2 emission for global environment Peer-reviewed T. Nakata, S. Ashina, T. Togasaki Proceedings of the 26th IAEE International Conference (CD-ROM)　1　(1)　1-10　2003/06 New Challenges for Energy Invited Toshihiko Nakata Energy and Resources　24　(3)　215-215　2003/05/05 ISSN：0285-0494 Analysis of the Impacts of Fuel Cell Vehicles on Energy Systems in the Transportation Sector in Japan. Peer-reviewed Ryo Kinugasa, Toshihiko Nakata Energy and Resources　24　(2)　128-134　2003/03 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 Design for renewable energy systems with application to rural areas in Japan T. Nakata Proceedings of The 1st International Symposium on Sustainable Energy Systems　1　(1)　98-98　2003/03 Assessment of operational characteristics of small-sized nuclear power in Japan Peer-reviewed T. Nakata, S. Ashina Proceedings of the Seventh Nuclear Energy Symposium　1　(1)　1-17　2002/08 Optimization for the operation of electric power generation taking account of distributed regional demand in Japan Peer-reviewed T. Nakata, S. Ashina Proceedings of the 25th IAEE International Conference (CD-ROM)　1-10　2002/06 Analysis of the impacts of nuclear phase-out on energy systems in Japan International-journal Peer-reviewed Toshihiko Nakata Energy　27　(4)　363-377　2002/04 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/S0360-5442(01)00090-1 　 ISSN：0360-5442 More details Close Nuclear power is likely to be widely recognized as one of the few options that can help countries meet base load electricity demand with virtually no greenhouse gas emissions. In Japan, the deregulation of Electricity Supply Industry (ESI) is expected to introduce competition into the electricity market and change market structures to lower electricity prices. As investors assume the risk of their investments, incentives to invest in nuclear power become conservative. This research examines the impacts of nuclear phase-out on both energy systems and carbon dioxide emission in Japan. A partial equilibrium model of the Japanese energy sector has been developed to forecast changes in the energy system until the year 2040. This model can account for the changes in energy technology capacities, fuels, and consumption in response to policy initiatives, such as taxes. We find that the nuclear phase-out results in an 8% increase in carbon dioxide emissions by the year 2040. To achieve the same level of carbon dioxide emissions without nuclear power in the future, it will be necessary to charge a 30% higher carbon tax than in a similar scenario with nuclear power. © 2002 Elsevier Science Ltd. All rights reserved. Strategies for carbon taxation for reducing CO2 emissions in Japan and Korea Peer-reviewed T. Nakata Current Politics and Economics of Asia　11　(4)　291-323　2002 Liquid-Solid Contact in Microbubble Emission Boiling through Void Signals. Peer-reviewed KUMAGAI Satoshi, UHARA Tsuyoshi, NAKATA Toshihiko, IZUMI Masaaki TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B　67　(661)　2304-2310　2001/09/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.67.2304 　 ISSN：0387-5016 More details Close The high heat flux in MEB far exceeding CHF should be considered a result of violent growing and collapsing behavior of coalescent bubbles in that region, which strongly introduces subcooled liquid to the heated surface. This bubble behavior generates a high pressure in the vicinity of the surface. In this study, a measurement of the pressure fluctuation in the liquid near the surface was performed synchronously with a recording of the bubble motion by use of a void probe set close to the surface. In high liquid subcooling conditions (S-MEB I), the void probe signal in the vicinity of the surface shows regular cyclic behavior synchronous with the pressure waveform. Under a medium subcooling condition (S-MEB II), there appear three different modes in the void signal in sequence. The one looks random and does not synchronize with the pressure waveform. The another is very systematic and similar to the signal in high liquid subcooling. The other shows a constant void fraction of a high value, indicating the surface to be covered with a thick vapor blanket. The time fraction of the second mode increases gradually with increasing the heat flux. Role of nuclear power: Design for hydrogen-based, carbonless energy systems Peer-reviewed T. Nakata Proceedings of the 6th International Symposium on Energy Future in the Asia/Pacific Region　1　(1)　1-7　2001/07 Sensitivity analysis by introducing discontinuity in an energy-economic model Peer-reviewed T. Nakata, S. Ashina Proceedings of the 24th IAEE International Conference (CD-ROM)　1-10　2001/04 Analysis of the impacts of carbon taxes on energy systems in Japan International-journal International-coauthorship Peer-reviewed Toshihiko Nakata, Alan Lamont Energy Policy　29　(2)　159-166　2001/01 Publisher: ELSEVIER SCI LTD DOI： 10.1016/S0301-4215(00)00104-X 　 ISSN：0301-4215 More details Close This research examines the impacts of using carbon and energy taxes to reduce carbon emissions from the Japanese energy system. A partial equilibrium model of the Japanese energy sector has been developed to forecast changes in the energy system out to the year 2040. The model accounts for the changes in energy technology capacities, fuels, and consumption in response to policy initiatives, such as taxes. We find that carbon and energy taxes will decrease carbon dioxide emission to a proposed target. The total cost in terms of supplying energy will be similar for either approach. However, the model also indicates that carbon taxes cause a shift in resources used from coal to gas. IGCC does not penetrate the market in carbon tax case. Since energy security is a primary concern to Japan, maintaining a diverse base of resources is very important. Policies that would eliminate coal, and efficient coal-based technologies, may not be desirable. The development of clean coal technologies and advanced transportation technologies suitable for Japan&＃39;s energy systems should be the next target to overcome the limit of carbon taxes. © 2000 Elsevier Science Ltd. All rights reserved. Cleaner Vehicles for Reducing CO2 Emissions from Transportation in Japan Peer-reviewed T. Nakata Proceedings of the Externalities in the Urban Transport:Assessing and Reducing the Impacts: 2nd Conference　1-10　2000/10 Analysis of the impact of hybrid vehicles on energy systems in Japan International-journal Peer-reviewed Toshihiko Nakata Transportation Research Part D: Transport and Environment　5　(5)　373-383　2000/09 Publisher: PERGAMON-ELSEVIER SCIENCE LTD DOI： 10.1016/S1361-9209(00)00005-5 　 ISSN：1361-9209 More details Close This study examines the impact of using hybrid vehicles for passenger transportation on carbon emissions in the Japanese energy system. A partial equilibrium model of the energy sector has been developed to forecast changes in the energy system out to the year 2040. The model can account for changes in technology capacities, fuels, and consumption in response to policy initiatives, such as taxes. We find that hybrid vehicles are more efficient in reducing carbon dioxide emission than conventional vehicles. Hybrid vehicles have a great impact on reducing carbon emissions when BTU taxes are imposed, which in turn has the advantage of encouraging a more diverse set of technologies and fuels. (C) 2000 Elsevier Science Ltd. All rights reserved. A Case Study on Energy Systems in Japan: Impact of Deregulation of Electric Power Industry Peer-reviewed T. Nakata Proceeding of the 21st Annual North American Conference of the USAEE/IAEE (CD-ROM)　1-10　2000/09 Analysis of the Impact of Fuel Cell Vehicles on Energy Systems in Japan Peer-reviewed T. Nakata Proceedings of the 23rd IAEE Annual International Conference (CD-ROM)　1　1-10　2000/06 A study of combustion characteristics of gasified coal fuel International-journal Peer-reviewed Takeharu Hasegawa, Mikio Sato, Toshihiko Nakata Transactions of the ASME, Journal of Engineering for Gas Turbines and Power　123　(1)　22-32　2000/05/15 Publisher: American Society of Mechanical Engineers (ASME) DOI： 10.1115/1.1287586 　 The Role of Nuclear Power: A Cost-Effective Solution to Meet Constraints of Carbon Emissions Peer-reviewed T. Nakata Proceedings of the 5th International Symposium on Energy Future in Asia/Pacific Region　1　38-47　2000/03 The Role of Nuclear Power in Electricity Supply in Japan International-journal Toshihiko Nakata Energy Future in the Asia/Pacific Region　1-10　2000/01 Analysis of the impacts of alternative technologies on energy systems in Japan International-journal Peer-reviewed Toshihiko Nakata NEW EQUILIBRIA IN THE ENERGY MARKETS: THE ROLE OF NEW REGIONS AND AREAS - VOL 1, CONFERENCE PROCEEDINGS　1　154-163　1999/06 Publisher: INTERNATIONAL ASSOCIATION FOR ENERGY ECONOMICS More details Close This research examines the impacts of using hybrid vehicles for passenger transportation to reduce carbon emissions from the Japanese energy system. A partial equilibrium model of the Japanese energy sector has been developed to forecast changes in the energy system out to the year 2040. The model can account for the changes in energy technology capacities, fuels, and consumption in response to policy initiatives, such as taxes. We find that although hybrid vehicles are more efficient in reducing carbine dioxide emission than conventional vehicles. Hybrid vehicles have a great impact on emissions with Btu taxes, which have the advantage of encouraging a more diverse set of technologies and fuels. Void Fraction Behavior in the Vicinity of the Surface in Microbubble Emission Boiling Peer-reviewed Satoshi Kumagai, T. Uhara, Toshihiko Nakata, M. Izumi Proceedings of the Fifth ASME/JSME Joint Thermal Engineering Conference (CD-ROM)　1　1-8　1999/03 Analysis of Energy Systems for the Reduction of CO2 Emissions in Japan International-journal Peer-reviewed Toshihiko Nakata Proceedings of the 4th International Symposium on Energy Future in the Asia/Pacific Region　1　135-140　1999/03 A study of combustion characteristics of gasified coal fuel International-journal Peer-reviewed Takeharu Hasegawa, Mikio Sato, Toshihiko Nakata Proceedings of the ASME Turbo Expo　2　(1)　22-32　1999 Publisher: ASME-AMER SOC MECHANICAL ENG DOI： 10.1115/99-GT-398 　 ISSN：0742-4795 More details Close The development of integrated, coal-gasification combined cycle (IGCC) systems provides cost-effective and environmentally sound options for meeting future coal-utilizing power generation needs in the world. The Japanese government and the Electric Power Indushies in Japan promoted research and development of an IGCC system. We have being working on developing a low-NOx combustion technology used in gas turbine combustors for IGCC. Each gaseous fuel produced from some raw materials contained CO and 1-12 as the main combustible components, and a small amount of CH4. Compositions and calorific values of gasified coal fuels varied widely depending on raw materials and gasifier types. Gaseous fuel, produced in various gasifiers, has a calorific value of 4-13MJ/m , which is about one-tenth to one-third that of natural gas. The flame temperatures of fuels increase as the fuel calorific value rises. When the fuel calorific value rises 8MJ/m³ or higher, the flame temperature is higher than that of natural gas, and so NOx production from nitrogen fixation is expected to increase significantly. Also, some gasified coal fuels contain fuel nitrogen, such as ammonia, if the hot/dry type gas cleaning system is employed. These factors affect the combustion characteristics of the gasified coal fuel. In this paper, we clarified the influence of gasified coal fuel properties on NOx and CO emissions through experiments using a small diffusion burner and through numerical analysis based on reaction kinetics. The main results were as follows: (1) NH3 conversion to NOx increases with increasing CH4 concentration in gaseous fuel. (2) If gaseous fuel contains CH4, there will be some specific equivalence ratio in the primary combustion zone for the minimum NH3 conversion to NOx in the two-staged combustion. (3) Its specific equivalence ratio in the primary combustion zone increases with decreasing CH4 concentration in gaseous fuel. (4) If the fuel contains a small percent of CH4, there is no influence of the CO/H2 molar ratio in the fuel on the conversion rate of NH3 to NOx, while there is an influence in the case where fuel contains no CH4. The conversion rate increases with rises in the CO/H2 molar ratio. (5) As the pressure increases, the conversion rate of NH3 to NOx slightly decreases and the CO emission declines significantly. Impacts of CO2 constraints on energy systems in Japan International-journal International-coauthorship Peer-reviewed Toshihiko Nakata, Alan Lamont, Jill Watz 19th Annual North American IAEE/USAEE Conference on Technology Critical Role in Energy and Environmental Markets　1　386-395　1998/10/18 Publisher: INTERNATIONAL ASSOCIATION FOR ENERGY ECONOMICS More details Close This research examines the impacts of using carbon taxes and Btu taxes to reduce carbon emissions from the Japanese energy system. A partial equilibrium model of the Japanese energy sector has been developed to forecast changes in the energy system out to the year 2040. The model can account for the changes in energy technology capacities, fuels, and consumption in response to policy initiatives, such as taxes. We find that although carbon taxes are somewhat more efficient in some senses than Btu taxes, the difference is not large. Btu taxes have the advantage of encouraging a more diverse set of technologies and fuels, which may be an advantage since energy security is a primary concern to Japan. Paradigm shift in technology and environment through industrial ecology 中田俊彦 地球環境研究　(43)　41-54　1998/10 Publisher: None ISSN：1343-6791 Reaction of fuel NOx formation for gas turbine conditions International-journal Peer-reviewed Toshihiko Nakata, Mikio Sato, Takeharu Hasegawa Journal of Engineering for Gas Turbines and Power　120　(3)　474-480　1998/07 Publisher: ASME-AMER SOC MECHANICAL ENG DOI： 10.1115/1.2818169 　 ISSN：0742-4795 eISSN：1528-8919 More details Close Ammonia contained in coal-gasified fuel is converted to nitrogen oxides (NO ) in the combustion process of a gas turbine in integrated coal gasification combined cycle (IGCC) system. Research data on fuel-NO formation are insufficient, and there still remains a wide explored domain. The present research aims at obtaining fundamental knowledge of fuel-NO formation characteristics by applying reaction kinetics to gas turbine conditions. An instantaneous mixing condition was assumed in the cross section of a gas turbine combustor and both gradual mixing condition and instantaneous mixing condition were assumed at secondary air inlet section. The results may be summarized as follows: (1) in the primary combustion zone under fuel rich condition, HCN and other intermediate products are formed as ammonia contained in the fuel decomposes; (2) formation characteristics of fuel-NO are affected by the condition of secondary air mixing; and (3) the conversion ratio from ammonia to NO declines as the pressure inside the combustor rises under the condition of gradual mixing at the secondary air inlet. These results obtained agreed approximately with the experimentation. © 1998 by ASME. x x x x x A Study on LBG-Fueled 1500.DEG.C.-class Gas Turbine Combustor for Use in IGCC. 1st Report, Design Study and Atmospheric Combustion Test of a Combustor. Peer-reviewed Takeharu Hasegawa, Mikio Sato, Toru Ninomiya, Toshihiko Nakata TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B　64　(618)　582-589　1998/02/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.64.582 　 ISSN：0387-5016 More details Close The development of &＃34;integrated coal gasification combined cycle systems&＃34; ensures cost-effective and environmentally-sound options for fulfilling future power generation needs. In our laboratory, we are developing a 150 MW, 1500°C-class gas turbine combustor for IGCC by using an air-blown coal gasifier both to enhance thermal efficiency and to reduce NO_x emission from the plant. This paper descrides the design of the 150MW, 1500°C-class gas turbine combustor, at atmospheric pressure for IGCC based on the stable and low-NO_x combustion technology developed to date. Combustion tests are conducted and the performance of this combustor is evaluated. Test results confirm the excellent performance of the combustor for use in a gas turbine in IGCC and project bright prospects as a high temperature, low NO_x combustion technology of the low calorific fuel. A study on low NOx combustion in LBG-fueled 1500°c-class gas turbine International-journal Peer-reviewed Toshihiko Nakata, Toru Ninomiya, Takeharu Hasegawa Journal of Engineering for Gas Turbines and Power　118　(3)　534-540　1996/07 Publisher: ASME-AMER SOC MECHANICAL ENG DOI： 10.1115/1.2816680 　 ISSN：0742-4795 eISSN：1528-8919 More details Close Developing integrated coal gasification combined-cycle systems ensures cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NO emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in Integrated Coal Gasification Combined Cycle (IGCC) power generation systems. The coal gasified fuel, which is produced in a coal gasifier of an air-blown entrained-flow type has a calorific value as low as 1/10 of natural gas. Furthermore, the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. This study is performed in a 1500PC-class gas turbine combustor firing low-Btu coal-gasified fuel in IGCC systems. An advanced rich-lean combustor of 150-MW class gas turbine was designed to hold stable combustion burning low-Btu gas and to reduce fuel NO emissions from the ammonia in the fuel. The main fuel and the combustion air are supplied into a fuel-rich combustion chamber with strong swirl flow and make fuel-rich flame to decompose ammonia into intermediate reactants such as NHi and HCN. The secondary air is mixed with primary combustion gas dilatorily to suppress the oxidization of ammonia reactants in fuel-lean combustion chamber and to promote a reducing process to nitrogen. By testing under atmospheric pressure conditions, the authors have obtained a very significant result through investigating the effect of combustor exit gas temperature on combustion characteristics. Since we have ascertained the excellent performance of the tested combustor through our extensive investigation, we wish to report on the results. © 1996 by ASME. x x Study of Ammonia Removal from Coal-Gasified Fuel. Peer-reviewed Takeharu Hasegawa, Mikio Sato, Toshihiko Nakata Transactions of The Japan Society of Mechanical Engineers Series B　61　(592)　4483-4491　1995/12/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.61.4483 　 ISSN：0387-5016 More details Close In integrated coal gasification combined cycle power generation (IGCC) systems, ammonia in the gasified fuel is passed through a hot/dry gas cleanup facility into the gas turbine. The ammonia is converted to nitrogen oxides in the combustion process in the gas turbine. Therefore ammonia removal from coal-gasified fuel would effectively reduce NO_x emissions in IGCC systems. We&＃39;re defined the optimum NO/NH₃ ratio, the optimum concentration of added O₂ and the influence of CO and H₂ in the coal-gasified fuel on NH₃ decomposition and NO reduction by experiments using a tubular flow reactor and numerical analysis based on reaction kinetics. The main results are as follows : (1) The optimum NO/NH₃ ratio is about 1 to maximize NH₃ decomposition and NO reduction. (2) The NH₃ decomposition ratio depends only on H₂, and decreases rapidly with increasing H₂ concentration. (3) The NO reduction ratio decreases with increasing H₂ concentration. (4) This method is effective for decreasing TFN by up to 60% minimizing the total concentration of remaining NH₃ and NO in air-blown coal-gasified fuel. Reaction Kinetics of Fuel NOx Formation for Gas Turbine Conditions International-journal Peer-reviewed Toshihiko Nakata, Mikio Sato, Takeharu Hasegawa Proceedings of the ASME/JSME Thermal Engineering Joint Conference　3　227-234　1995/03 Effect of pressure on combustion characteristics in LBG-fueled 1300°C-class gas turbine International-journal Peer-reviewed Toshihiko Nakata, Mikio Sato, Toru Ninomiya, Toshiyuki Yoshine, Masahiko Yamada Journal of Engineering for Gas Turbines and Power　116　(3)　554-558　1994/07 Publisher: ASME-AMER SOC MECHANICAL ENG DOI： 10.1115/1.2906855 　 ISSN：0742-4795 eISSN：1528-8919 More details Close Developing integrated coal gasification combined cycle systems ensures that Japan will have cost-effective and environmentally sound options for supplying future power generation needs. Reduction of NO emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in IGCC. The coal gasified fuel, which is produced in a coal gasifier of air blown entrained-flow type has a calorific value as low as 1/10 of natural gas. Furthermore, the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. The study is performed in 1300°C-class gas turbine combustor firing coal-gasifier fuel in IGCC power generation systems. In the previous study [1] the advanced rich-lean combustor of 150-MW class gas turbine was designed to hold stable combustion burning low-Btu gas fuel and to reduce fuel NO emission that is produced from the ammonia in the fuel. By testing it under atmospheric pressure conditions, we have studied the effects of fuel parameters on combustor performances and listed the basic data for development applications. In this study, by testing it under pressurized conditions, we have obtained a very significant result through investigating the effect of pressure on combustion characteristics and wish to provide herein a summary of our findings. © 1994 by ASME. x x Study on low NOx combustion in LBG-fueled 1500°C-class gas turbine Peer-reviewed Toshihiko Nakata, Mikio Sato, Toru Ninomiya, Takeharu Hasegawa ASME 1994 International Gas Turbine and Aeroengine Congress and Exposition　3　1-8　1994/06/13 DOI： 10.1115/94-GT-218 　 ISSN：0402-1215 More details Close Developing integrated coal gasification combined cycle systems ensures cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NOx emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in an Integrated Coal Gasification Combined Cycle (IGCC) power generation systems. The coal gasified fuel, which is produced in a coal gasifier of air-blown entrained-flow type has calorific value as low as 1/10 of natural gas. Furthermore the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. This study is performed in a 1500°C-class gas turbine combustor firing low-Btu coal-gasified fuel in IGCC systems. An advanced rich-lean combustor of 150-MW class gas turbine was designed to hold stable combustion burning low-Btu gas and to reduce fuel NOx emission that is produced from the ammonia in the fuel. The main fuel and the combustion air is supplied into fuel-rich combustion chamber with strong swirl flow and make fuel-rich flame to decompose ammonia into intermediate reactants such as NHi and HCN. The secondary air is mixed with primary combustion gas dilatorily to suppress the oxidization of ammonia reactants in fuel-lean combustion chamber and to promote a reducing process to nitrogen. By testing it under atmospheric pressure conditions, the authors have obtained a very significant result through investigating the effect of combustor exit gas temperature on combustion characteristics. Since we have ascertained the excellent performance of the tested combustor through our extensive investigation, we wish to report on the results. Study of Ammonia Removal from Coal Gasified Fuel, Fourth Report: Effect of Combustible Component on Ammonia Decomposition T.Hasegawa, M.Sato, T.Nakata CRIEPI REPORT　EW94001　1-37　1994 Study of Ammonia Removal from Coal Gasified Fuel 4th Report,Effect of Combustible Components on Ammonia Decomposition T. Hasegawa, M. Sato, T. Nakata CRIEPI Research Report　W93007　(W93007)　1-38　1993/12 More details Close With regard to the influence of CO and H2 in the coal gasified fuel on the reaction properties of reduction of NH3 and NO,we defined by the experiments using the tubular flow reactor and numerical analysys based on reaction kinetics.Main results are shown below:(1)NH3 decomposition ratio depends only on the concentration of H2.There is no influence by CO,that is,NH3 decomposition ratio decreases exponentially with increasing the concentration of H2.(2)NO decomposition ratio decreases with increasing the concentration of H2.Considering the above mentioned results,the higher the concentration of H2 is,the more the reduction ratios of NH3 and NO increases.In view of these properties,this method has the advantage of fluidized bed gasified fuel for entrained bed gasified fuel with high concentration of H2. Formation Characteristics of Fuel NOx in the Combustion of Coal Gaseous-Fueled Gas Turbine. Peer-reviewed Toshihiko Nakata, Mikio Sato, Takeharu Hasegawa Transactions of The Japan Society of Mechanical Engineers Series B　59　(564)　2568-2575　1993/08/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.59.2568 　 ISSN：0387-5016 More details Close Coal-gasified fuel contains ammonia in a hot gas cleaning system in integrated coal gasification combined cycle (IGCC) power generation systems. Ammonia is converted to nitrogen oxides in the combustion process of a gas turbine. Research data on the NOx formation mechanism in fuel is insufficient, and there still remains a wide unexplored domain. The present research aims at obtaining more fundamental knowledge by means of elementary reaction kinetics. We have obtained a very significant result by comparing the kinetics calculations with combustion experiments. The result is that fuel NO_x formation characteristics is affected considerably by the conditions of secondary-air mixing and the concentration change of methane in fuel. Study on the mechanism of NOx formation associated with coal gasification fuel combustion in gas turbines and its reduction Peer-reviewed Toshihko Nakata Doctoral dissertation　(乙第6097号)　1-242　1993/06/10 Publisher: Tohoku University Development of 1500 degree-class gas turbinecombustor for IGCC, Part 3, Experimental results from pilot production of 1500 degree-class combustor T. Nakata, T. Hasegawa, T. Ninomiya, M. Sato CRIEPI Research Report　W92041　(W92041)　1-26　1993/06 Development of 1500 degree-class gas turbine combustor for IGCC, Part 2, Evaluation of combustor structure using water model T. Ninomiya, T. Nakata, T. Hasegawa, M. Sato CRIEPI Research Report　W92040　(W92040)　1-20　1993/06 Effect of pressure on combustion characteristics in LBG-fueled 1300°C-class gas turbine International-journal Peer-reviewed Toshihiko Nakata, Mikio Sato, Toru Ninomiya, Toshiyuki Yoshine, Masahiko Yamada ASME 1993 International Gas Turbine and Aeroengine Congress and Exposition　2　(3)　554-558　1993/05/24 Publisher: The American Society of Mechanical Engineers DOI： 10.1115/93-GT-121 　 ISSN：0402-1215 More details Close Developing integrated coal gasification combined cycle systems ensures that Japan will have cost-effective and environmentally sound options for supplying future power generation needs. The reduction of NOx emissions and increasing the inlet temperature of gas turbines are the most significant issues in gas turbine development in IGCC. The coal gasified fuel, which is produced in a coal gasifier of air-blown entrained-flow type has calorific value as low as 1/10 of natural gas. Furthermore the fuel gas contains ammonia when a gas cleaning system is a hottype, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. The study is performed in 1300 °C-class gas turbine combustor firing coal-gasified fuel in IGCC power generation systems. In the previous study° the advanced rich-lean combustor of 150-MW class gas turbine was designed to hold stable combustion burning low-Btu gas fuel and to reduce fuel NOx emission that is produced from the ammonia in the fuel. By testing it under atmospheric pressure conditions, we have studied the effects of fuel parameters on combustor performances and listed the basic data for development applications. In this study, by testing it under pressurized conditions, we have obtained a very significant result through investigating the effect of pressure on combustion characteristics and wish to provide herein a summary of our findings. Reaction Analysis in the Combustion of Coal Gasifi ed Fuel,Third Report:Study on Fuel NOx Reduction in a Gas Turbine Combustor T.Nakata, T.Hasegawa, M.Sato CRIEPI REPORT　EW92005　(W92010)　1-27　1993 Development of 1500 C-Class Gas Turbine Combustor for Use in IGCC, Third Report: Experimental Results from a Pilot Production of a 1500 C-Class Combustor T.Nakata, T.Hasegawa, T.Ninomiya, M.Sato CRIEPI REPORT　EW93003　1-29　1993 Preliminary Combustion Tests of a 1500 C-Class Gas Turbine Combustor for IGCC Peer-reviewed T. Nakata, M. Sato, T. Ninomiya, T. Hasegawa Proceedings of the JSME-ASME International Conference on Power Engineering-93　2　445-450　1993 Reaction analysis in combustion of coal gasfied fuel, Part 3, Fuel NOx reduction in gas turbine combustor T. Nakata, T. Hasegawa, M. Sato CRIEPI Research Report　W92010　1-23　1992/11 Development of a 1300.DEG.C.-Class Gas Turbine Combustor Burning Coal-Derived Low-BTU Gaseous Fuels. 4th Report. Experimental Evaluation of an Advanced Rich-Lean Combustor under High-Pressure Conditions. Peer-reviewed Toshihiko Nakata, Mikio Sato, Toru Ninomiya, Toshiyuki Yoshino, Masahiko Yamada Transactions of The Japan Society of Mechanical Engineers Series B　58　(553)　2890-2897　1992/09/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.58.2890 　 ISSN：0387-5016 More details Close Research and development of an integrated coal gasification combined cycle (IGCC) have made steady progress. Low fuel-NOx combustion technology presents great potential for improving IGCC combustors. The authors have developed an advanced rich-lean combustor designed mainly for achieving low-NO_x combustion and flame stability. Under pressurized conditions, we have success-fully reduced the NO_x emissions (to 60ppm corrected at 16 percent O₂) when ammonia concentration was 1000ppm. We have also optimized many design guidelines by clarifying the effects of pressure on combustor performance. This paper describes in detail the characteristics of the advanced rich-lean combustor for use in IGCC. Design and test of a low-NOx advanced rich-lean combustor for LBG fueled 1300°C-class gas turbine International-journal Peer-reviewed Toshihiko Nakata, Mikio Sato, Toru Ninomiya, Toshiyuki Yoshine, Masahiko Yamada ASME 1992 International Gas Turbine and Aeroengine Congress and Exposition, GT 1992　3　1-8　1992/06/01 Publisher: American Society of Mechanical Engineers DOI： 10.1115/92-GT-234 　 More details Close Research and development of an IGCC (Integrated Coal Gasification Combined Cycle) power generation system is being carried out as one of the advanced coal utilization technology in Japan. The coal gasified fuel, which is produced in a coal gasifier of air-blown entrained-flow type has calorific value as low as 1/10 of LNG. Furthermore, the fuel gas contains ammonia when a gas cleaning system is a hot type, and ammonia will be converted to nitrogen oxides in the combustion process of a gas turbine. The authors have designed and made an 1300°C-class advanced rich-lean combustor mainly designed for achieving low fuel-NOx combustion. By testing it under atmospheric pressure conditions, we have successfully reduced the NOx emissions (to 60 ppm corrected at 16 percent O ) by more than half the level previously achieved when the ammonia concentration was 1000 ppm. Combustion stability was adequate even when the calorific value of the fuel decreased to 2700 kJ/m N. 2 3 Development of 1500 C Class Gas Turbine Combustor for IGCC.1st Report:Design Study and Combustion Test of a Combustor T. Nakata, T. Hasegawa, T. Ninomiya, M. Sato CRIEPI Research Report　W91048　(W91048)　1-21　1992/05 Study of Ammonia Removal in Coal Gasified Fuel 3rd Report,Mechanism of Ammonia Decomposition in Gas Phase Reaction T. Nakata, T. Hasegawa, M. Sato CRIEPI Research Report　W91049　(W91049)　1-18　1992/05 Reaction Analysis of Coal Gaseous Fuel in a Gas Turbine Combustor. Peer-reviewed Toshihiko Nakata, Mikio Sato Journal of the Japan Institute of Energy　71　(1)　34-41　1992/01/20 Publisher: The Japan Institute of Energy DOI： 10.3775/jie.71.34 　 ISSN：0916-8753 More details Close On the emission characteristics of CO and thermal NOx in a gas turbine combustor using coal gaseous fuel, the analysis of the combusition reaction using an kinetics model was conducted. It was revealed that the analyzing results agreed well with the expermental data. In the analyzing method, chemical species of fourteen kinds and elementary reactions equations of twenty-eight types are used for the chemical kinetics in the combustor. An assumption is made that the fuel and air are mixed well instantaneously in each section of the combustor axial direction and a combustion gas temperature is stood for by an adiabatic flame temperature. Decomposition behaviors of the main combustible components (CO, H ) in the combustor and the reaction of thermal NOx formation are revealed through the analyzing method as the follwing. The thermal NOx formation proceeds within 0.1 msec reaction time, it is formed in large quantities in near 1.0 air ratio at which the combustion gas temperature is especially high. The NOx emission concentration of the gas turbine combustor calculated by the analyzing method agreed well with the experimental data. © 1992, The Japan Institute of Energy. All rights reserved. 2 Development of a Gas Turbine Combustor for IGCC, Ninth Report: Experimental Evaluation of an Advanced Rich-Lean Combustor under High Pressurized Condi tions T.Nakata, T.Ninomiya, M.Sato, T.Yoshine, M.Yamada CRIEPI REPORT　EW91012　1-16　1992 Development of a 1500 C-Class Gas Turbine Combusto r for IGCC, First Report:Design Study and Combustio n Test of a Combustor T.Nakata, T.Hasegawa, T.Ninomiya, M.Sato CRIEPI REPORT　EW92001　1-23　1992 Study of Ammonia Removal in Coal Gasified Fuel, Third Report:Mechanism of Ammonia Decomposition in Gas Phase Reaction T.Nakata, T.Hasegawa, M.Sato CRIEPI REPORT　EW92002　1-19　1992 Development of gas-turbine combustor for IGCC, Part 9, Experimental evaluation of advanced combustor under high-pressure conditions T. Nakata, T. Ninomiya, M. Sato, T. Yoshine, M. Yamada CRIEPI Research Report　W91011　(W91011)　1-16　1991/11 Development of a LBG Fueled Low NOx Combustor Peer-reviewed T. Nakata, M. Sato, T. Ninomiya, H.Ishikawa, T. Yoshine, M. Yamada Proceedings of the 1991 Yokohama International Gas Turbine Congress, 91-YOKOHAMA-IGTC-53　3　65-72　1991/10 Experimental Evaluation of a Low-NOx LBG Combustor with Air Bypass System Peer-reviewed S. Mandai, N. Sato, M. Sato, T. Ninomiya, T. Nakata Proceedings of the 1991 Yokohama International Gas Turbine Congress, 91-YOKOHAMA-IGTC-54　3　73-78　1991/10 Development of gas-turbine combustor for coal gasification, Part 8, Characteristics of low-nox combustor using bypass air T. Ninomiya, T. Nakata, M. Sato, S. Mandai, N. Sato CRIEPI Research Report　W91004　(W91004)　1-22　1991/09 Numerical calculation of gas-turbine combustors, Direct simulation of three-dimensional flow in combustor T. Nakata, M. Sato, S. Miura, K. Sato CRIEPI Research Report　W91001　(W91001)　1-31　1991/06 Development of a 1300.DEG.C.-class gas turbine combustor burning coal-derived low BTU gaseous fuels. 3rd Report, Experimental evaluation of an advanced rich-lean combustor. Peer-reviewed Mikio Sato, Toru Ninomiya, Toshihiko Nakata, Hiroshi Ishikawa, Toshiyuki Yoshine, Masahiko Yamada Transactions of The Japan Society of Mechanical Engineers Series B　57　(535)　803-810　1991/03/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.57.803 　 ISSN：0387-5016 More details Close This paper describes the development of a 1300°C class gas turbine combustor burning coal-derived low-Btu gaseous fuels. Coal-derived gaseous fuels contain NH₃ if a gas cleaning system is hot type and NH₃ will be converted to NO_x in the gas turbine combustion process. Combustion tests were conducted by using the newly designed, advanced rich-lean combustor. Combustion stability was excellent for the testing combustor because of a subcombustor, so combustion stability could be obtained even when the calorific value of fuel decreased to about 2 600 KJ/m³N. As for NO_x emission, NH₃ conversion to NO_x was 40% under the full load condition at 1300°C of the combustor exit gas temperature for 1000ppmv of NH₃ concentration and 0.7vol% of CH₄ in the fuel. The effect of CH4 contained in coal gas fuel on NOx formation. Peer-reviewed Kouji Yamauchi, Mikio Sato, Toshihiko Nakata TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series B　57　(535)　811-818　1991/03/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.57.811 　 ISSN：0387-5016 More details Close The main combustible gas components of the coal-derived gas fuel are CO and H2. Moreover, a small amount of NH3 and CH4 will be contained. NH3 contained in coal gas fuel will be converted to NOx in the gas turbine combustion process. This paper describes the study of the influence of the coal gas fuel properties such as CH4 on NOx formation from NH3, using experimental study by a laboratory-scale combustor and study of the reaction kinetics. As a result, a small amount of CH4 in coal gas fuel was found to strongly influence NOx formation from NH3 in coal gas fuel. Numerical Calculation of a Gas Turbine Combustors, First Report: Direct Simulation of Three Dimensional Flow in a Combustor T.Nakata, M.Sato, M.Miura, K.Sato CRIEPI REPORT　EW91007　1-30　1991 Development of a 1300.DEG.C.-class gas turbine combustor burning coal-derived low-BTU gaseous fuels. International-journal Peer-reviewed Mikio Sato, Toshihiko Nakata, Toshiyuki Yoshine, Masahiko Yamada Transactions of The Japan Society of Mechanical Engineers Series B　56　(530)　3147-3154　1990/10/25 Publisher: The Japan Society of Mechanical Engineers DOI： 10.1299/kikaib.56.3147 　 ISSN：0387-5016 More details Close In the coal gasification combined-cycle power generation system, it is necessary to develop a high-temperature gas turbine combustor using coal-derived gaseous fuels, which has high thermal efficiency and low emission of pollutants. Combustion tests were conducted using a full scale combustor for a 150-MW-class gas turbine under atmospheric pressure. Furthermore, high pressure combustion tests were conducted by using a 20-MW-class gas turbine combustor. Main results are as follows : Thermal NO_x emission was very low in a combustion of coal derived low Btu gaseous fuel, and its emission level was 15 ppm under a full load condition at of the combustor exit gas temperature of 1300°C. The tested combustors were not designed for low fuel NO_x combustion. Therefore NO_x emission resulting from l000 ppmv of ammonia accounted for about 95 % of the total NO_x emissions, The ammonia conversion to NO_x decreased slightly with increasing of combustion pressure. NOx Emission characteristics of coal-derived low BTU gas fuel. Peer-reviewed SATO Mikio, NAKATA Toshihiko, YAMAUTI Kouji Journal of the Fuel Society of Japan　69　(10)　952-959　1990/10/20 Publisher: THE JAPAN INSTITUTE OF ENERGY DOI： 10.3775/jie.69.10_952 　 ISSN：0369-3775 More details Close Coal gaseous fuels contain NH₃ which will be converted to NO_x in the gas turbine combustion process, if gas cleaning system is a hot type. Main com-bustible gas components of the coal gaseous fuel are CO and H₂, moreover a small amount of CH4 will be contained. Hydrocarbon such as CH₄ has the effect on NO_x formation from fuel nitrogen such as NH₃.
In this study, combustion tests were conducted by using a laboratory scale com-bustor for the study of the influence of the coal gaseous fuel properties on NO_x emis-sion characteristics.
Main results are as follows;
(1) NH₃ conversion to NO_x increases with increasing CH₄ concentration in coal gaseous low BTU fuel.
(2) If coal gaseous fuel containes CH₄, there will be some specific equivalence ratio in the primary combustion zone for the minimum NH3 conversion to NO_x.
(3) Its specific equivalence ratio in the primary combustion zone increases with de-creasing CH₄ concentration in coal gaseous fuel. Development of lbtu-fired gas-turbine combustor of advanced combustor, Part 7 Experimental evaluation T. Nakata, T. Ninomiya, M. Sato, H. Ishikawa, T. Yoshine, M. Yamada, E. Hisa CRIEPI Research Report　W90011　(W90011)　1-26　1990/10 More details Close LOW NOX FUEL TECHNOLOGY IS ONE OF THE MOST IMPORTANT SUBJECTS IN DEVELOPING A GAS-TURBINE COMBUSTOR FIRED ON LOW-BTU FUEL DERIVED FROM GASIFIED COAL. WE DESIGNED AN ADVENCED COMBUSTOR COMPOSED OF THREE SEPARETE PARTS AND OBTAINED SATISFACTORY RESULTS. THE FUEL AMMONIA CONTENT WAS REDUCED TO NITROGEN IN THE MAIN COMBUSTION CHAMBER UNDER FUEL-RICH CONDITIONS. THIS REPORT SUMMARIZES THE EXPERIMENTALDATA FOR THE 150-MW,1300DEGREE (1573K) CGT-5001 GAS-TURBINE COMBUSTOR. Development of gas-turbine combustor for coal gasification part 6, Low-NOx combustion technology for combustor using bypass air T. Ninomiya, T. Nakata, M. Sato, S. Mandai, N. Sato CRIEPI Research Report　W90005　(W90005)　1-19　1990/08 Experimental evaluation of a low NOx LBG combustor using bypass air International-journal Peer-reviewed Toshihiko Nakata, Mikio Sato, Toru Ninomiya, Toshio Abe, Shiigemi Mandai, Nobuo Sato American Society of Mechanical Engineers (Paper)　3　1-19　1990/06/11 Publisher: American Society of Mechanical Engineers (ASME) DOI： 10.1115/90-GT-380 　 ISSN：0402-1215 More details Close A 150-MW, 1300°C (1573 K) class gas turbine combustor firing coal-gasified fuel has been designed. Main purpose of this paper is to estimate CO and NOx emissions, and to discuss the low NOx combustion technology burning such a low-BTU gas. The full-scale, atmospheric-pressure combustion tests were conducted over a wide range of conditions using bypass air. The role of air bypass valve is important for low NOx combustion, and to give stable combustion at lower load conditions. Ammonia conversion to NOx is minimized with a optimum air ratio in primary combustion zone. Coal gaseous fueled, low fuel-NOx gas turbine combustor International-journal Peer-reviewed M. Sato, T. Ninomiya, T. Nakata, T. Yoshine, M. Yamada, S. Hisa American Society of Mechanical Engineers (Paper)　3　1-6　1990/06/11 Publisher: American Society of Mechanical Engineers (ASME) DOI： 10.1115/90-GT-381 　 ISSN：0402-1215 More details Close In Japan a development program on the coal gasification combined cycle power generation system was started in 1985 by the national government and Japanese electric companies. In this program, the plan is to develop the 1300 °C class gas turbines. However, in the case a hot type fuel gas cleaning system, the coal gas fuel to be supplied to gas turbines will contain ammonia. The authors showed that the rich-lean combustion method is effective to decrease fuel-NOx. In the rich-lean combustion method, the fuel-NOx decreases as the primary zone becomes richer. Flameholding becomes very difficult in the rich primary zone. For this reason this combustor was designed to have a flameholder with a pilot flame. Combustion tests were conducted by using a full scale combustor used in 150 MW gas turbine at the atmospheric pressure condition. Reaction analysis of combustion for coal-derived gaseous fuel, Part 2 Fuel NOx formation K. Yamauchi, M. Sato, T. Nakata CRIEPI Research Report　W89026　(W89026)　1-24　1990/02 Development of a Gas Turbine Combustor for Coal Gasification,Fifth Report:Evaluation of a Rich-Lea n Combustor with Pilot Flame T.Ninomiya, M.Sato, T.Nakata, K.Yamauchi, M.Fukazawa, T.Abe,H.Ishikawa, T.Yoshine, M.Yamada, S.Hisa, H. Hasegawa CRIEPI REPORT　EW89010　1-34　1990 Study on Low-Calorific Gas Combustion,Fifth Report :Effects of Methane on Combustion Characteristics K.Yamauchi, M.Sato, T.Nakata CRIEPI REPORT　EW89012　1-29　1990 Development of a Gas Turbine Combustor for Coal Gasification,Sixth Report:Low NOx Combustion Technology for a Combustor Using Bypass Air T.Ninomiya, T.Nakata, M.Sato, S.Mandai, N.Sato CRIEPI REPORT　EW90005　1-19　1990 Development of a Gas Turbine Combustor Fired on Low-BTU Gases,Seventh Report:Experimental Evaluation of an Advanced Combustor T.Nakata, T.Ninomiya, M.Sato, H.Ishikawa, T.Yoshine, M.Yamada, S.Hisa CRIEPI REPORT　EW90009　1-25　1990 Development of gas turbine combustor using coal derived gaseous fuel, Part 5, Eevaluation of rich- lean combustor with pilot flume T. Ninomiya, M. Sato, T. Nakata, K. Yamauchi, M. Fukazawa, T. Abe, H. Ishikawa, T. Yoshine, M. Yamada, E. Hisa, H. Hasegawa CRIEPI Research Report　W89017　(W89017)　1-35　1989/11 IGCC Combustor Tests for a 150 MW Gas Turbine Invited Peer-reviewed M. Sato, T. Abe, T, Ninomiya, T. Nakata Modern Power Systems　9　(11)　81-87　1989/11 Development of LBG combustor, Part 3, Experimental evaluation of LBG combustor using bypass air T. Nakata, M. Sato, T. Ninomiya, K. Yamauchi, M. Fukawaza, H, Ishikawa, Y. Mandai, N. Sato, K. Mikata CRIEPI Research Report　W89010　(W89010)　1-33　1989/10 More details Close A 150-MW,1300 DEGREE (1573K)-CLASS GAS-TURBINE COMBUSTOR FIRED BY GASIFIED-COAL FUEL HAS BEEN DESIGNED. THE MAIN PURPOSE OF THE PRESENT PAPER IS TO ESTIMATE THE CO AND NOX EMISSIONS,AND TO DISCUSS LOW-NOX COMBUSTION TECHNOLOGY USING A LOW-BTU GAS. FULL-SCALE,ATMOSPHERIC-PRESSURE COMBUSTION TESTS WERE CONDUCTED OVER A WIDE RANGE OF CONDITIONS USING BYPASS AIR. THE RESULTS ARE SUMMARIZED AS FOLLOWS: (1)THE DESIGNED COMBUSTOR HAS AN EXCELLENT EFFICIENCY OF 99.6% EVEN WHEN THE CALORIFIC VALUE OF THE FUEL DROPS TO 650 KCAL/CUBE MN. (2)CO AND NOX EMISSIONS CAN BE ESTIMATED FROM THE AIR RATIO IN THE PRIMARY COMBUSTION ZONE. (3)THE ROLE OF THE AIR BYPASS VALVE IS IMPORTANT FOR LOW-NOX COMBUSTION AND TO GIVE STABLE COMBUSTION AT LOWER LOAD CONDITIONS. (4)AMMONIA CONVERSION TO NOX IS MINIMIZED WITH AN OPTIMUM AIR RATIO IN THE PRIMARY COMBUSTION ZONE. Developement of low-NOx gas-turbine combustor burning coal-derived low-btu gaseous fuels M. Sato, T. Ninomiya, T. Nakata, T. Abe, H. Ishikawa, T. Yoshine, M. Yamada, E. Hisa CRIEPI Research Report　W89014　(W89014)　1-22　1989/10 Combustion Characteristics of Coal Derived Gaseous Fuel Peer-reviewed T. Nakata, M. Sato, T. Ninomiya Proceedings of 1989 International Conference on Coal Science　1　277-280　1989/10 Development of a low-NOx LBG combustor for coal gasification combined cycle power generation systems International-journal Peer-reviewed Mikio Sato, Toshio Abe, Toru Ninomiya, Toshihiko Nakata, Toshiyuki Yoshine, Hiroshi Hasegawa American Society of Mechanical Engineers (Paper)　4　1-19　1989/06/04 Publisher: American Society of Mechanical Engineers (ASME) DOI： 10.1115/89-GT-104 　 ISSN：0402-1215 More details Close From the view point of future coal utilization technology for the thermal power generation systems, the coal gasification combined cycle system has drawn special interest recently. In the coal gasification combined cycle power generation system, it is necessary to developed a high temperature gas turbine combustor using a low-BTU gas (LBG) which has high thermal efficiency and low emissions. In Japan a development program of the coal gasification combined cycle power generation system has started in 1985 by the national government and Japanese electric companies. In this program, 1300°C class gas turbines will be developed. If the fuel gas cleaning system is a hot type, the coal gaseous fuel to be supplied to gas turbines will contain ammonia. Ammonia will be converted to nitric oxides in the combustion process in gas turbines. Therefore, low fuel-NOx combustion technology will be one of the most important research subjects. This paper describes low fuel-NOx combustion technology for 1300°C class gas turbine combustors using coal gaseous low-BTU fuel as well as combustion characteristics and carbon monoxide emission characteristics. Study on low-calorific gas combustion, Part 5. Effect of methane on combustion characteristics- K. Yamauchi, M. Sato, T. Nakata CRIEPI Research Report　W88028　(W88028)　1-28　1989/05 Analysis of Coal Gasified Fuel Combustion Reaction, First Report: Thermal NOx Emission Characteristics T.Nakata, M.Sato CRIEPI REPORT　EW89008　1-12　1989 Study on removal of ammonia in coal derived gaseous fuel, Part 1, Ammonia decomposition mechanism by oxygen M. Sato, K. Yamauchi, T. Nakata CRIEPI Research Report　W88006　(W88006)　1-27　1989/01 Study on removal of ammonia in coal derived gaseous fuel, Part 2, Effect of nitric oxide for ammonia removal- K. Yamauchi, M. Sato, T. Nakata CRIEPI Research Report　W88013　(W88013)　1-24　1988/10 Analysis of gaseous coal fuel combustion reaction, Thermal NOx emission characteristics T. Nakata, M. Sato, K. Yamauchi CRIEPI Research Report　W88008　(W88008)　1-25　1988/09 More details Close THE PURPOSE OF THIS PAPER IS TO DEVELOP A NUMERICAL CALCULATION METHOD FOR A GAS-TURBINE COMBUSTOR USING GASEOUS COAL FUEL. WE DEVELOPED AN ELEMENTARY MODEL TO DESCRIBE THE CHEMICAL KINETICS,AND PREDICT TERMAL NITROGEN-OXIDE FORMATION AND CARBON-MONOXIDE DECOMPOSITION IN THE COMBUSTOR BY NUMERICALLY SOLVING THE TIME-DEPONDENT CONSERVATION EQUATIONS FOR THE CHEMICAL SPECIES. AS A RESULT,THE COMPUTATION FITS VARIOUS EXPERIMENTAL DATA AND WE HAVE MADE CONSIDERABLE PROGRESS IN DEVELOPING AN ACCURATE CHEMICAL KINETICS SCHEME FOR USE IN DESIGNING GAS-TURBINE COMBUSTORS Development of low-btu gas-turbine combustorfor coal gasification comfined cycle power generation system, Part1 Evaluation of prot type combustor M. Sato, T. Abe, T. Nakata, M. Fukazawa, T. HIsamatsu, E. Hisa, T. Yoshine, M. Yamada CRIEPI Research Report　W87035　(W87035)　1-51　1988/09 Study of low-calorific gas combustion (Part4), Combustion stability and NOx emission characteristics in premixed combustion T. Nakata, M. Sato, K. Yamauchi CRIEPI Research Report　W87030　1-25　1988/04 More details Close THIS REPORT DESCRIBES THE FUNDAMENTAL CHARACTERISTICS OF PREMIXED COMBUSTION AND ITS APPLICATION TO A GAS-TURBINE COMBUSTOR. WE SHOW THAT A PREMIXED COMBUSTION METHOD IS EFFECTIVE FOR LOW-NOX EMISSION AND STABLE COMBUSTION WHEN IT IS USED WITH TWO-STAGE COMBUSTION. Methods for Predicting NOx Emissions in Coal Combustion and Unburned Carbon in Fly Ash T.Nakata, M.Sato, H.Makino, T.Ninomiya CRIEPI REPORT　EW87003　(W87009)　1-30　1988 Gas turbine research facility for coal gasification combined cycle power generation system, Outline of research facility M. Sato, T. Ninomiya, T. Hisamatsu, T. Abe, T. Sema, T. Hamamatsu, T. Tanaka, H. Ishikawa CRIEPI Research Report　W87019　(W87019)　1-41　1987/12 Effects of coal properties on NOx and unburned carbon emission characteristics T. Nakata, M. Sato, H. Makino, T. Ninomiya CRIEPI Research Report　W87009　1-31　1987/11 More details Close THIS STUDY DESCRIBES THE EFFECTS OF COAL PROPERTIES ON NOX AND UNBURNED CARBON EMISSION CHARACTERISTICS IN PULVERIZED COAL COMBUSTION. TYPICAL TWENTY-EIGHT COALS ARE TESTED AND NEW PREDICTION METHODS OF NOX AND UNBURNED CARBON EMISSIONS ARE DEVELOPED AS FOLLOWS. (1)NOX EMISSIONS ARE PREDICTED BY A FUNCTION OF COAL PREPERTIES SUCH AS FUEL RATIO AND FUEL NITROGEN CONTENTS. (2)UNBURNED CARBON CONCENTRATIONS ARE PREDICTED BY A FUNCTION OF COAL PROPERTIES SUCH AS FUEL RATIO AND ASH CONTENTS. THESE FUNCTIONS WILL BE PRESENTED. Laser diagnostics applied to advanced comobusion systems T. Nakata, M. Sato, K, Kazuo CRIEPI Research Report　W86035　(W86035)　1-42　1987/06 More details Close THIS PAPER REVIEWS RELATIVELY RECENT MEASUREMENTS AND THE CONSEQUENT UNDERSRANDINGS ON THE FUNDAMENTAL PROCESSES OFCOMBUSTION. NUMEROUS STUDIES HAVE BEEN MADE FROM THEORETICAL OR EXPERIMENTAL POINT OF VIEW WHICH CONTRIBUTE TO THE BETTER UNDERSTANDING OF THE PROCESSES IN FLAMES AND TO THE POTENTIAL OF IMPROVING PRACTICAL COMBUSTOR S PERFORMANCES SUCH AS HIGHER EFFICIENCY AND LOWER EMISSIONS. TIMEAND SPACE RESOLVED MEASUREMENTS USING LASER TECHNIQUES TOGETHER WITH THE CONVENTIONAL TECHNIQUES HAVE BEEN PROVIDING VALUABLE DATA AND ENHANCING THE BETTER UNDERSTANDING. COMBUSTION DIAGNOSTICS ENCOMPASSED IN THIS REVIEW INCLUDE LASER RAMAN SCATTERING,LASER-INDUCED FLUORECENCE,CONHERENT ANTI-STOKES SPECTROSCOPY AND LASER DOPPLER VELOCIMETRY. Effects of Two Stage Combustion to Emission Characteristics of NOx and Unburned Carbon in Fly Ash T. Ninomiya, M. Sato, H. Makino, T. Nakata CRIEPI Research Report　W86028　(W86028)　1-45　1987/06 Study on low carolific gas combustion (Part 3), NOx emission characteristics in two stage combustion M. Sato, T. Nakata, T. Ninomiya CRIEPI Research Report　W86034　1-37　1987/05 Emission Characteristics of NOx and Unburned Carbon with Pulverized Coal Fired NR Burner T. Nakata, H. Makino, T. Ninomiya, M. Sato CRIEPI Research Report　W86012　1-27　1986/11 A Study on Low Gas Combustion - Blowout Limits ofFlames and Flue Gas Prapeties- T. Ninomiya, T. Nakata CRIEPI Research Report　285068　(285068)　1-37　1986/08 Study on low carolific gas combution (part 1), A preliminary study on flame stability and temperature M. Sato, T. Sema, T. Ninomiya, T. Nakata CRIEPI Research Report　285041　(285041)　1-28　1986/06 Emission characteristics of NOx and unburnedcarbon in fly ash in case of blended pulverized coal combustion M. Sato, H. Makino, T. Ninomiya, T. Nakata CRIEPI Research Report　285032　1-44　1986/01 Show all ︎Show first 5 Misc. 256 On assuming the office of Branch Director Invited Toshihiko Nakata JSME Tohoku Branch NEWS LETTER　27　1-1　2024/06/05 Publisher: JSME Tohoku Branch Wind toward a carbon-neutral society Invited Toshihiko Nakata TAKAOKA TOKO REVIEW　10　1-1　2023/09 Publisher: TAKAOKA TOKO Co. Ltd. 地域エネルギー需給データベースを用いるカーボンニュートラル社会の地域デザイン 中田俊彦 実践教育ジャーナル　2023 ISSN：0912-9111 Selection of onshore and offshore wind power generation models and estimation of power generation potential considering regional wind speed distribution 松岡太一, REMI Delage, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　41st　2022 ISSN：1881-9907 Technology development and social implementation for the realization of a sustainable society Invited 武美 近久 Journal of the Society of Mechanical Engineers　124　(1233)　16-17　2021/08/05 Publisher: Japan Society of Mechanical Engineers DOI： 10.1299/jsmemag.124.1233_16 　 eISSN：2424-2675 To advanced integrated design and analysis of sustainable regional energy systems Invited Toshihiko Nakata Enermix　100　(3)　254-262　2021/05/20 Publisher: Japan Institute of Energy DOI： 10.20550/jieenermix.100.3_254 　 ISSN：2432-3586 More details Close This concept defines a wide-area regional energy system including regional cooperation, and proposes a system design method for &＃34;whole&＃34; optimization that promotes the utilization of renewable energy, drastic reduction of CO2 emissions, and regional economic circulation over a wide area. Through the analysis of factual data and the formulation of guidelines necessary for regional energy system design, we will contribute to the transformation to a decarbonized society and the improvement of resilience of regional energy supply and demand. Energy mapping Invited Toshihiko Nakata Enermix　100　(3)　243-243　2021/05/20 Publisher: Japan Institute of Energy O-01 Cross-border analysis of woody biomass resource considering the harvesting systems 千田遥斗, 根本和宣, 中田俊彦 バイオマス科学会議発表論文集(Web)　16　2021 ISSN：2423-8341 全国の各市区町村における木質バイオマス利用可能量の推計 千田遥斗, 中村直人, 根本和宣, 中田俊彦 日本森林学会大会学術講演集　132nd　2021 ISSN：2187-6576 Estimation of Woody Biomass Potential by Municipality considering sustainability 根本和宜, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　40th　2021 ISSN：1881-9907 Manual for the Papers Presented at Annual Meeting 小坂健太, 根本和宜, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　40th　2021 ISSN：1881-9907 Estimation of V2G Installation Potential Using Mobile Phone Location Data 天野哲, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　40th　2021 ISSN：1881-9907 Estimation of Regional Heat and Electricity Demand and Creation of a National Database 楠本祥喜, DELAGE Remi, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　40th　2021 ISSN：1881-9907 Optimal design of interregional power interchange network considering renewable energy based on Multi-Agent Simulation 末松天地, DELAGE Remi, 根本和宜, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　40th　2021 ISSN：1881-9907 Social implementation as a new paradigm Invited Toshihiko Nakata 42　1-1　2020/11/14 Publisher: Japan Society of Mechanical Engineers セクターカップリングを考慮した脱炭素型エネルギーシステムの最適設計及び性能評価 長野尚也, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　36th　2020 ISSN：1883-4736 市区町村の地域特性を考慮した広域エネルギーシステムの統合設計 小野寺弘晃, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　36th　2020 ISSN：1883-4736 福島県奥会津地域における分散型木質エネルギー利用のサプライチェーン設計 根本和宜, 中村省吾, 森保文, 大場真, 中田俊彦 日本森林学会大会学術講演集　131st　2020 ISSN：2187-6576 セクターカップリングを考慮した余剰電力を活用する地域熱供給システムの設計 尾崎竣也, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　36th　2020 ISSN：1883-4736 Japan‘s future Invited NAKATA Toshihiko Yamaoka Ikueikai　(55)　46-47　2019/12 Nakata Laboratory, Tohoku University Invited NAKATA Toshihiko District Cooling & Heating　122　40-46　2019/03 Publisher: Japan District Heating & Cooling Association 熱導管ネットワークの拡張を考慮した地域熱供給システムの性能解析 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　35th　2019 ISSN：1883-4736 地域資源・エネルギー需給の分析に基づく脱炭素社会に向けたエネルギーシステムの最適設計 角田友明, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　35th　2019 ISSN：1883-4736 交通手段選択の分析に基づく,持続可能な社会に向けた地域内旅客運輸システムのエネルギー消費の構造分析 村形夏生, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　35th　2019 ISSN：1883-4736 セクターカップリングを考慮した脱炭素型地域エネルギーシステムの設計 長野尚也, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　35th　2019 ISSN：1883-4736 部分均衡エネルギー・経済モデルによる2050年脱炭素社会に向けた持続可能エネルギーシステムの統合デザイン~運輸部門における電動化,バイオ燃料導入によるCO₂削減効果の分析~ 高橋遼, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　35th　2019 ISSN：1883-4736 4-3 Analysis of regional biomass energy system considering heat, power and CHP 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　14　2019 ISSN：2423-8341 P-02 Design of a sustainable forestry policy model for the Oku Aizu in Fukushima Prefecture 佐藤高士, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　14　2019 ISSN：2423-8341 P-44 Integrated design and analysis for supply chain of Empty Fruit Bunch pellet 横井佑香, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　14　2019 ISSN：2423-8341 エネルギー需給特性を考慮した市区町村のクラスター分析 小野寺弘晃, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　38th　2019 ISSN：1881-9907 東北地域におけるセクターカップリングを考慮した地域エネルギーシステムの設計 長野尚也, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　38th　2019 ISSN：1881-9907 O-09 Technological and Economic Assessment of Woody Biomass Production Cost 海邉健二, 大友順一郎, 中田俊彦 バイオマス科学会議発表論文集(Web)　15　2019 ISSN：2423-8341 P-37 Design and Analysis of Residential Heat Supply System using Forest Resources in Mountainous Areas 根本和宜, 中田俊彦 バイオマス科学会議発表論文集(Web)　15　2019 ISSN：2423-8341 P-01 Development of wood harvesting system model considering a spatial information of forest resources 千田遥斗, 根本和宜, 中田俊彦 バイオマス科学会議発表論文集(Web)　15　2019 ISSN：2423-8341 森林空間情報に基づく林業機械の最適運用計画と生産性評価 佐藤高士, 古林敬顕, 中田俊彦 日本森林学会大会学術講演集　130th　2019 ISSN：2187-6576 Selection requirements for woody biomass utilization technology in local area of Japan 根本和宜, 中村省吾, 森保文, 大場真, 中田俊彦 技術と社会の関連を巡って:過去から未来を訪ねる講演論文集(CD-ROM)　2019　2019 Design of regional heat supply system based on spatial information analysis of energy supply and demand 尾崎竣也, 中田俊彦 技術と社会の関連を巡って:過去から未来を訪ねる講演論文集(CD-ROM)　2019　2019 持続可能な超スマート社会を実現するエネルギーサービスデータベースの構築戦略(第1回)街づくりエネルギーマネジメント推進協議会【座談会】 Invited 高口 洋人, 中丸 正, 江村 勝治, 倉田 昌典, 瀬戸 寿一, 田中 謙司, 中澤 仁, 中田 俊彦, 中村 良道, 西野 文人, 野原 文男, 平野 聡, 古谷 雅年, 樋渡 元子, 小林 秀行 スマートグリッド : 技術雑誌 = Smart grid : technical journal　8　(4)　49-54　2018/10 Publisher: 大河出版 ISSN：2185-9604 P-02 Assessing Food and Energy Nexus Based on their Material and Energy Flows Analysis 川島彩貴, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　13　2018 ISSN：2423-8341 O-19 Design of the regional biomass energy system based on the effective utilization rate of resource 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　13　2018 ISSN：2423-8341 P-01 Integrated Design of Woody Biomass Harvesting System Based on a Spatial Information Analysis 岡野航介, 古林敬顕, 中田俊彦, 大場真 バイオマス科学会議発表論文集(Web)　13　2018 ISSN：2423-8341 P-09 Integrated design and analysis for global supply chain of Empty Fruit Bunch 横井佑香, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　13　2018 ISSN：2423-8341 P-03 Integrated design of wastewater heat energy utilization system for decarbonization at urban and regional level 角田友明, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　13　2018 ISSN：2423-8341 欧州型地域熱供給の特性と日本への導入ポテンシャル評価 藤井伸, 古林顕敬, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　34th　2018 ISSN：1883-4736 導管熱密度を考慮した地域熱供給システムの設計 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　34th　2018 ISSN：1883-4736 世界と日本のフロー分析に基づく食料・エネルギーネクサス 川島彩貴, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　34th　2018 ISSN：1883-4736 持続可能な自動車製造業に向けた工場近隣ゾーンの再生可能エネルギー利用システム設計 北村駿太郎, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　34th　2018 ISSN：1883-4736 シェアードカー移行に伴う地域エネルギーシステムの構造変化 村形夏生, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　34th　2018 ISSN：1883-4736 Design of Sustainable EFB Utilization System Considering International Transportation 古林敬顕, 赤尾貢佑, 中田俊彦, 河西英一 Journal of the Japan Institute of Energy (Web)　97　(10)　2018 ISSN：1882-6121 Analysis for energy supply-demand structure and system performance of smart community 長野尚也, 古林敬顕, 中田俊彦 日本地域学会年次大会学術発表論文集(Web)　55th　2018 158 Spatial distribution analysis of local energy demand-supply and design of energy system in Fukushima 清野若菜, 古林敬顕, 中田俊彦 日本機械学会東北支部総会・講演会講演論文集(Web)　2018.53　2018 ISSN：2424-2713 Integrated design of sustainable energy system for decarbonized society in 2050 高橋遼, 古林敬顕, 中田俊彦 技術と社会の関連を巡って:過去から未来を訪ねる講演論文集(CD-ROM)　2018　2018 We have a piano on engineering campus! T. Nakata Aoba Kougyou-kai News　53　5-5　2017/04 Publisher: 東北大学工学部 俯瞰ワークショップ報告書 未来のエネルギー社会のビジョン検討 T. Nakata Center for Research and Development Strategy, Japan Society and Technology Agency　CRDS-FY2016　(WR-09)　27-29　2017/03 Publisher: Japan Society and Technology Agency More details Close ISBN 978-4-88890-535-0 Design for a glocal energy system Nakata, T Architectural Design Report　20　(2)　1-4　2017/02 Publisher: パナソニック株式会社エコソリューションズ社 Research committee of Low carbon energy system design Nakata, T Newsletter, JSME POWER & ENERGY SYSTEMS　(54)　16-16　2017/01/15 Publisher: JSME More details Close ISSN 2188-9120 家庭部門におけるエネルギーフローの作成とエネルギー消費特性の評価 川島彩貴, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　33rd　2017 ISSN：1883-4736 資源と需要の空間情報分布に基づく地域エネルギーシステムの準最適設計 井上憲輝, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　33rd　2017 ISSN：1883-4736 エネルギー需要の空間分布に基づく地域エネルギーシステムの設計 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　33rd　2017 ISSN：1883-4736 資源とエネルギーのネクサスを考慮した自動車リサイクルの性能評価 佐藤フェルナンド賢太, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　33rd　2017 ISSN：1883-4736 Wood Flow Chart for Japan: Material and Energy Utilization 古林敬顕, 住友雄太, 中田俊彦 Journal of the Japan Institute of Energy (Web)　96　(7)　2017 ISSN：1882-6121 P-08 Optimal design of woody biomass supply chains using a spatial analysis of woody materials 佐竹宏貴, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　12　2017 ISSN：2423-8341 O-07 Improvement of the Bioethanol Process 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　12　2017 ISSN：2423-8341 P-04 Evaluation of mechanized wood harvesting system using spatial information 岡野航介, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　12　2017 ISSN：2423-8341 Assessing food and energy supply nexus based on their material and energy flows analysis 川島彩貴, 古林敬顕, 中田俊彦 日本地域学会年次大会学術発表論文集(Web)　54th　2017 Design of energy system in vehicle assembly plants for decarbonizing society 北村駿太郎, 古林敬顕, 中田俊彦 日本機械学会東北支部総会・講演会講演論文集(Web)　2017.52　2017 ISSN：2424-2713 Integrated Design for Sustainable Energy Systems 中田俊彦 日本エネルギー学会大会講演要旨集(Web)　26　2017 ISSN：2423-8325 機械系同窓会（20周年記念）総会を開催 T. Nakata 青葉工業会ニュース　52　5-5　2016/04 Publisher: 青葉工業会 第28回 福島後の未来をつくる Invited Nakata, T Economist Weekly　94　(11)　70-71　2016/03/15 Publisher: Mainichi Shimbun Publishing Inc. ISSN：0013-0621 「新しい東北」の現在地点 産業復興 T. Nakata New Tohoku Mode Case Book　2　28-31　2016/03 Publisher: Reconstruction Agency of Japan 石炭混焼発電を考慮した木質バイオマス供給システムの設計 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　32nd　2016 ISSN：1883-4736 エネルギーレジリエンスの定量的な評価手法の構築 蔡亮成, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　32nd　2016 ISSN：1883-4736 地域内経済および資源循環を考慮したエネルギーシステムの試設計 菊池美南, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　32nd　2016 ISSN：1883-4736 エネルギー需給分布図の作成と地域エネルギー需給構成の比較研究 瀧田祐樹, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　32nd　2016 ISSN：1883-4736 資源と需要の空間情報分布に基づく地域エネルギーシステムの設計 井上憲輝, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　32nd　2016 ISSN：1883-4736 P-60 Design for a wood-fuel supply system with storage processes 佐竹宏貴, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集(Web)　11　2016 ISSN：2423-8341 10. Power & Energy SYstems Division as a Technology Roadmap toward 2030 T. Nakata Journal of the Japan Society of Mechanical Engineers　119　(1170)　307-307　2016 Publisher: Japan Society of Mechanical Engineers DOI： 10.1299/jsmemag.119.1170_307 　 ISSN：0021-4728 いま大学で（進路支援の現場から） 中田俊彦 東北大学機械系同窓会誌　(19)　74-76　2015/09/30 Publisher: 東北大学機械系同窓会 Renewable Energy Project Nakata, T Miyako City Newsletter　(238)　16-16　2015/07/15 Publisher: Miyako City 化石燃料代替を目的とした木質バイオマス利活用システムの評価 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 混合整数計画法に基づく輸送手段および前処理施設配置の最適化と木質バイオマス利活用システムへの応用 佐藤雄治, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 再生可能エネルギーのポテンシャルを考慮したエネルギーフローの作成 瀧田祐樹, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 燃料製造と需要家の価格感応性を考慮した旅客部門における燃料電池自動車の導入可能性評価 内田皓久, 古林敬顕, 中田俊彦, 松本満 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 多目的解析手法を応用したエネルギーセキュリティの定量評価 蔡亮成, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 多様な資源及び技術を考慮したバイオマス利活用システムのエネルギー評価指標の構築 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　10th　2015 熱需給の空間分布を考慮した地域エネルギーシステムの最適設計 住友雄太, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 水素の製造から消費までを考慮したマテリアルフローの作成 勝又遼太, 古林敬顕, 中田俊彦, 松本満 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　31st　2015 ISSN：1883-4736 成長特性を考慮した藻類バイオ燃料の導入可能性評価 矢田健人, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　10th　2015 林分収穫モデルに基づく木質バイオマス利用の持続可能評価 門間千宙, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　10th　2015 地域内の経済および資源の循環を考慮したエネルギーシステムの試設計 菊池美南, 古林敬顕, 中田俊彦 環境システム研究論文発表会講演集　43rd　2015 ISSN：1345-9589 洋上風力発電導入に伴う地域産業への経済波及効果の分析 菊池美南, 中田俊彦, 古林敬顕 日本機械学会動力・エネルギー技術シンポジウム講演論文集　20th　2015 岩手県沿岸部の震災復興におけるバイオマス発電の経済波及効果 國光洋二, 中田俊彦, 吉見勝治 農業農村工学会大会講演会講演要旨集(CD-ROM)　2015　2015 地域社会をデザインするには T. Nakata Journal of JCMA　66　(10)　3-3　2014/10/25 Publisher: Japan Construction Machinery and Construction Association F083001 エネルギーを社会システムとして捉えるアプローチ手法([F08300]動力エネルギーシステム部門企画,低炭素社会をめざすエネルギーシステムデザイン) 中田 俊彦 年次大会 : Mechanical Engineering Congress, Japan　2014　&＃34;F083001-1&＃34;-&＃34;F083001-2&＃34;　2014/09/07 Publisher: 一般社団法人日本機械学会 家庭部門の熱及び電力需要を考慮したバイオマス利活用システムの設計 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　9th　2014 空間情報に基づく持続可能な木質バイオマスエネルギー利用システムの設計 森上慶太, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　9th　2014 熱需要の空間情報を考慮した弘前地域の地域熱供給システムの設計 恩田英, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　30th　2014 ISSN：1883-4736 CO₂フリー水素と燃料電池自動車を考慮した道路輸送部門の低炭素シナリオのデザイン 古林敬顕, 中田俊彦, 松本満 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　30th　2014 ISSN：1883-4736 燃料電池自動車の導入による化石燃料輸入額の抑制効果 松本満, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　30th　2014 ISSN：1883-4736 熱需要の空間分布を考慮した地域熱供給システムの熱力学的指標に基づく性能評価 會川翔, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　30th　2014 ISSN：1883-4736 自律・分散型エネルギー社会の地域デザイン 中田俊彦 電気学会全国大会講演論文集(CD-ROM)　2014　2014 木質バイオマス熱分解ガスの燃焼における火炎近傍の中間生成物がNO_x生成に及ぼす影響 向井大介, 松本順文, 白石裕司, 中田谷直広, 中塚記章, 林潤, 赤松史光, 古林通孝, 安田俊彦 日本機械学会関西支部定時総会講演会講演論文集　89th　2014 内生的技術進歩と外生的コスト変動を考慮した燃料電池自動車の導入可能性評価 内田皓久, 古林敬顕, 中田俊彦, 松本満 日本機械学会動力・エネルギー技術シンポジウム講演論文集　19th　2014 New Year&＃39;s Round-table Discussion : Research and Education for the Interdisciplinary Field including Energy and Economy Invited K. Ban, K. Ueda, T. Nakata, T. Tezuka Energy and Resources　35　(1)　3-12　2014/01 Publisher: Japan Society of Energy and Resources ISSN：0285-0494 F081001 エネルギーシステムデザインの考え方とアプローチ手法(【F08100】低炭素社会をめざすエネルギーシステムデザイン,動力エネルギーシステム部門企画,先端技術フォーラム) 中田 俊彦 年次大会 : Mechanical Engineering Congress, Japan　2013　&＃34;F081001-1&＃34;-&＃34;F081001-2&＃34;　2013/09/08 Publisher: 一般社団法人日本機械学会 習熟効果およびエネルギー効率の自律的改善に誘発される技術変遷の影響分析 臼井岳文, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　29th　2013 ISSN：1883-4736 地域熱供給システムと個別暖房・給湯方式の性能評価 井上清文, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　29th　2013 ISSN：1883-4736 エクセルギー指標に基づく地域エネルギーシステムの性能評価 會川翔, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　29th　2013 ISSN：1883-4736 資源の変遷と技術習熟を考慮した中長期エネルギーシステムの設計 瀧田祐樹, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　29th　2013 ISSN：1883-4736 持続可能なエネルギー社会(自律・分散型エネルギー社会)の地域デザイン 中田俊彦 センサ・マイクロマシンと応用システムシンポジウム(CD-ROM)　30th　2013 F082001 ポスト震災の地域エネルギーシステムの近況 中田 俊彦 年次大会 : Mechanical Engineering Congress, Japan　2012　&＃34;F082001-1&＃34;-&＃34;F082001-2&＃34;　2012/09/09 Publisher: 一般社団法人日本機械学会 2011年国際ガスタービン会議大阪大会 武石 賢一郎, 藤岡 照高, 岡井 敬一, 長谷川 武治, 野崎 理, 渡辺 紀徳, 辻本 良信, 山本 誠, 中田 俊彦, 今成 邦之, 牧野 敦, 太田 有, 柴田 貴範, 伊藤 栄作, 船崎 健一, 赤松 史光, 金子 成彦, 壹岐 典彦, 田沼 唯士, 齊藤 英治, 吉岡 洋明, 玉木 秀明, 茨水 誠一, 幸田 栄一, 谷村 和彦, 古川 洋之, 西岡 卓宏, 正田 淳一郎, 木下 康裕 日本ガスタービン学会誌　40　(2)　114-133　2012/03/20 Publisher: 日本ガスタービン学会 ISSN：0387-4168 アジア地域における国際輸送を考慮したオイルパーム残渣利活用システムの設計および導入可能性評価 赤尾貢佑, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　7th　2012 研究開発による技術習熟を考慮した太陽光発電コストおよび普及量の予測 速水新之介, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　28th　2012 ISSN：1883-4736 次世代自動車及びバイオ燃料の導入影響分析 高橋和也, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　28th　2012 ISSN：1883-4736 廃水処理に対するCDMを考慮したバイオガス利活用システムの導入影響評価 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　28th　2012 ISSN：1883-4736 地域スマートエネルギーシステムの設計 中田俊彦 電気学会電子・情報・システム部門大会講演論文集(CD-ROM)　2012　2012 経済・社会的側面を考慮した自動車用バイオフュエルのサプライチェーンの最適設計 依田和大, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　8th　2012 地理情報を用いた木質バイオマスのエネルギー利用システムの設計 森上慶太, 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　8th　2012 電池太陽光発電技術を中心とする低炭素型エネルギー需給システム技術調査報告 山口容平, 中田俊彦 電気学会全国大会講演論文集　2012　(3)　2012 資源と技術の多様性を考慮したバイオマスエネルギーシステムの設計 古林敬顕, 中田俊彦 日本機械学会東北支部総会・講演会講演論文集　47th　2012 資源の多様性と技術習熟を考慮した低炭素エネルギーシステムの設計 瀧田祐樹, 古林敬顕, 中田俊彦 日本機械学会環境工学総合シンポジウム講演論文集　22nd　2012 ISSN：2424-2969 東北地方の地域特性を考慮した地域熱拡給システムの設計 井上清文, 古林敬顕, 中田俊彦 日本機械学会環境工学総合シンポジウム講演論文集　22nd　2012 ISSN：2424-2969 石炭火力発電所混焼を想定した木質バイオマス供給システムの設計 森上慶太, 古林敬顕, 中田俊彦 日本機械学会環境工学総合シンポジウム講演論文集　22nd　2012 ISSN：2424-2969 技術の多様性を考慮した木質バイオマス利活用システムの設計 古林敬顕, 中田俊彦 日本機械学会環境工学総合シンポジウム講演論文集　22nd　2012 ISSN：2424-2969 東北地方の木質バイオマスポテンシャル評価 小野貴弘, 古林敬顕, 中田俊彦 日本機械学会環境工学総合シンポジウム講演論文集　22nd　2012 ISSN：2424-2969 DESIGN OF INTEGRATED ENERGY SYSTEM FOR MORE SUSTAINABLE COMMUNITY Sanaei Sayyed Mohammad, Nakata Toshihiko Symposium on Environmental Engineering　22　389-392　2012 Publisher: The Japan Society of Mechanical Engineers More details Close The goal of this research is to show the synergetic benefits obtainable by integrating energy sectors of society. The usual structure of community energy systems is such that various sectors of the society receive their required energy from mainly centralized facilities (e.g.centralized power plant). There is no interaction between different sectors of society. The goal of this research IS pursued by using a novel methodology R)r designing optimum integrated energy system in which symbiotic cooperation between various energy sectors has been defined. As a result, community&＃39;s energy demands are met more sustainably. Some of the relative merits of the proposed design compering to present situation are: 37% increase in energy efficiency, 86.5% reduction in net costs, and 17% decrease in amount of CO_2 production per capita. 第39回日本ガスタービン学会定期講演会先端技術フォーラム「低炭素社会に向けたエネルギーシステムのデザイン」報告 中田 俊彦 日本ガスタービン学会誌　39　(6)　450-450　2011/11/20 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0387-4168 「低炭素社会に向けたエネルギーシステムのデザイン」報告 Nakata, T Journal of the Gas Turbine Society of Japan　39　(6)　72　2011/11/20 Publisher: Gas Turbine Society of Japan バイオガス回収利用システムの設計とCDMに基づく性能評価 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　6th　2011 エクセルギー指標を考慮した家庭部門のエネルギーシステム設計 渡部泰輔, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　27th　2011 ISSN：1883-4736 環境影響を考慮した航空輸送システムに関する研究 渡辺祥伍, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　27th　2011 ISSN：1883-4736 Development of an Energy Economic Model with Endogenous Technical Progress and Feasibility Study of CCS Systems 楠朋也, 古林敬顕, 中田俊彦 日本機械学会論文集 B編(Web)　77　(780)　2011 ISSN：1884-8346 低炭素社会をめざすエネルギーシステムデザイン 中田俊彦 日本機械学会年次大会講演論文集(CD-ROM)　2011　2011 ISSN：2424-2667 国際輸送を考慮したEFB利活用システムの設計 赤尾貢佑, 古林敬顕, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　27th　2011 ISSN：1883-4736 スマートエネルギーシステムの地域デザイン 中田俊彦 ひろば　391　1-39　2010/08/20 Publisher: 東北原子力懇談会 Development Trend of Energy Technologies and Systems for Low-carbon Society in Japan 加藤丈佳, 島津聖, 森俊介, 今中健雄, 手塚哲央, 岡本覚, 杉原英治, 福田正樹, 横山良平, 涌井徹也, 浅野浩志, 下田吉之, 中田俊彦, 原亮一, 藤井康正, 古林敬顕 電気学会技術報告　(1187)　80P　2010/04/20 ISSN：0919-9195 エネルギー経済モデルによるエネルギーシステムの最適設計 中田 俊彦, 楠 朋也 GTSJガスタービンセミナー資料集　38　89-96　2010/01/21 Publisher: 公益社団法人日本ガスタービン学会 ISSN：1341-8491 わが国製造業のエネルギー消費構造の分析 野田冬彦, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　26th　2010 ISSN：1883-4736 一般廃棄物を利用した地域熱供給システム設計に関する研究 RODIONOV Mikhail, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　26th　2010 ISSN：1883-4736 地域特性を考慮した微細藻類バイオマスエネルギーシステムの導入可能性評価 大下紘史, 中田俊彦 バイオマス科学会議発表論文集　5th　2010 木質系バイオマスを利活用した地域熱供給システムの設計 古林敬顕, 中田俊彦 バイオマス科学会議発表論文集　5th　2010 先進諸国のエネルギーセキュリティーの定量評価 鈴木敬宏, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　26th　2010 ISSN：1883-4736 需要部門のエネルギー機器効率向上による南アフリカ共和国のCO₂排出量削減効果 松本重太, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　26th　2010 ISSN：1883-4736 インベントリ分析による下水汚泥エネルギー利用システムの性能評価と感度解析 木室洋介, 中田俊彦 バイオマス科学会議発表論文集　5th　2010 エネルギー回収を考慮したロシアの一般廃棄物処理システムの最適設計と性能評価 RODIONOV Mikhail, 中田俊彦, 古林敬顕 日本機械学会環境工学総合シンポジウム講演論文集　20th　2010 ISSN：2424-2969 Designing an energy system for a low-carbon society 中田俊彦 電気学会電力系統技術研究会資料　PSE-10　(201.203-209)　2010 エネルギー経済モデルによるエネルギーシステムの最適設計 中田俊彦, 楠朋也 ガスタービンセミナー資料集　38th　2010 ISSN：2433-5959 私のこだわりの一品 中田俊彦 あおば萌ゆ　11　1-1　2009/10/01 Publisher: 東北大学工学部 ロシアにおける最適な一般廃棄物処理システム設計に関する研究 RODIONOV Mikhail, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　25th　2009 ISSN：1883-4736 技術習熟を考慮したCO₂回収貯留技術の導入可能性評価 楠朋也, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　25th　2009 ISSN：1883-4736 インベントリ分析による下水汚泥エネルギー利用システムの性能評価 木室洋介, 中田俊彦 下水道研究発表会講演集　46th　2009 エネルギーシステムから未来社会を設計する 中田俊彦 翠嵐　(23)　15-18　2009/01 Publisher: 青葉工学振興会 Multi-objective evaluation of energy systems for rural electrification in developing countries SILVA Diego, NAKATA Toshihiko 24　51-54　2008/01/30 開発途上国のバイオマス資源を利用したエネルギーアクセス向上に関する研究 下平慧, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　24th　2008 ISSN：1883-4736 熱貯蔵を考慮した地域熱供給システムの設計に関する研究 藤田原野, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　24th　2008 ISSN：1883-4736 産業部門におけるエネルギー監査プログラムの比較評価 野田冬彦, 中田俊彦 日本エネルギー学会大会講演要旨集　17th　2008 発電に伴う排出ガス等外部費用の内生化に関する研究 山火弘毅, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集(CD-ROM)　24th　2008 ISSN：1883-4736 家庭用途エネルギー消費の現状と給湯システムの比較 馬場敏大, 中田俊彦 日本エネルギー学会大会講演要旨集　17th　2008 バイオマスのエネルギー利用システムとその性能評価 山元一史, 中田俊彦 電気学会電子・情報・システム部門大会講演論文集(CD-ROM)　2008　2008 バイオマス燃料を導入する運輸部門エネルギーシステムの統合評価 出口裕一郎, 中田俊彦 バイオマス科学会議発表論文集　3rd　2008 下水汚泥バイオマスのエネルギー利用システムの性能評価 木室洋介, 中田俊彦 日本エネルギー学会大会講演要旨集　17th　2008 Design of sustainable energy system considering regional disparity in developing countries SHIMODAIRA Kei, NAKATA Toshihiko 26　283-286　2007/06/13 ISSN：1881-9915 Evaluation of renewable energy technologies for rural isolated areas of Colombia SILVA Diego, NAKATA Toshihiko 23　423-426　2007/01/25 廃棄物をエネルギー源とする地域熱供給システムの最適設計 玉澤昇, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　23rd　2007 発展途上国の貧困削減に向けたエネルギーシステムの最適設計に関する研究 下平慧, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　23rd　2007 燃焼に伴う排出ガス等外部費用の内生化に関する研究 山火弘毅, 中田俊彦 燃焼シンポジウム講演論文集　45th　2007 家畜排せつ物の分布を考慮したメタン発酵プラントの最適配置と利活用方策の検討 伊藤吉紀, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　23rd　2007 バイオマスエネルギーの導入に伴う経済波及効果の評価 伊藤吉紀, 中田俊彦 バイオマス科学会議発表論文集　2nd　2007 木質等バイオマスのエネルギー変換技術のエクセルギー解析 塔ケ崎哲也, 中田俊彦 バイオマス科学会議発表論文集　2nd　2007 発展途上国の地域格差を考慮したエネルギーシステムの最適設計に関する研究 下平慧, 中田俊彦 エネルギー・資源学会研究発表会講演論文集(CD-ROM)　26th　2007 ISSN：1881-9907 副生水素を供給源とする分散型水素エネルギーシステムの設計 鈴木寛征, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　23rd　2007 エネルギー利用技術のテクノロジー・アセスメントに関する研究 太田小百合, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　23rd　2007 地域循環型エネルギーシステムの提案 森岡泰樹, 中田俊彦 電気学会全国大会講演論文集　2007　(3)　2007 応用一般均衡モデルによるクリーンコール技術の経済性評価 山火弘毅, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　23rd　2007 B143 Exergetic analysis of woody biomass utilization Togasaki Tetsuya, Nakata Toshihiko Procee[d]ings of Thermal Engineering Conference　2006　63-64　2006/11/23 Publisher: The Japan Society of Mechanical Engineers More details Close This study shows an exergetic analysis based on both enthalpy and exergy flow, aiming at the efficient use of biomass energy. Several technologies for heat and power derived from woody biomass can be assessed by means of exergy efficiency, which indicates work potential of energy amount. It also makes clear the lost opportunities to do work in the energy conversion process and offers plenty of room for improvement. The results show significant difference between thermal and exergy efficiencies. The largest exergy loss in biomass power plant is found at the boiler, however the largest enthalpy loss takes place in the steam turbine. E124 Study on economic aspects and introduction of clean coal technologies with CCS Yoshizaki Haruki, Nakata Toshihiko Procee[d]ings of Thermal Engineering Conference　2006　163-164　2006/11/23 Publisher: The Japan Society of Mechanical Engineers More details Close Coal has some advantages such that coal has the largest reserves among any other fossil fuels, and there is regional uniform distribution of production countries. On the other hand, there are some disadvantages such that the carbon content of coal is larger than that of any other fossil fuels. Technology to use coal for clean and efficiency is demanded. And technical development to contribute to CO_2 reduction is necessary. In this study, the most suitable CCS (Carbon Capture and Storage) system consisting of CO_2 collection, transportation, storages are designed. And introduction and economic aspects of CCT with CCS in electricity sector are investigated. Energy and society T. Nakata Manabino Mori　36　6　2006/06/30 地域特性を考慮した自動車用エネルギー作物利活用システムの設計 大山尚宏, 中田俊彦 日本エネルギー学会大会講演要旨集　15th　2006 Design of distributed hydrogen energy system using by-product hydrogen 鈴木寛征, 中田俊彦 日本機械学会熱工学コンファレンス講演論文集　2006　2006 地域特性および経済性を考慮したバイオマス利活用システムの設計 森岡泰樹, 中田俊彦 日本エネルギー学会大会講演要旨集　15th　2006 水素エネルギー貯蔵を考慮した地域総合エネルギーシステムの設計および導入促進策の検討 多田学, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　22nd　2006 カントリーリスクとエネルギー源分散を考慮したエネルギーセキュリティーの定量化と統合評価 広瀬健太郎, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　22nd　2006 内生的技術進歩モデルの開発とクリーンコール技術の経済性評価への適用 佐藤健実, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　22nd　2006 岩手県家庭部門におけるCHP導入に伴うCO₂抑制効果および経済性の検討 芦名秀一, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　22nd　2006 廃プラスチック利活用のための地域循環システムの最適設計 玉沢昇, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　22nd　2006 開発途上国農村部における電化とその社会・経済的影響の解析 金川誠, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　22nd　2006 Design of integrated renewable energy system Peer-reviewed 中田俊彦 Energy　38　(10)　80-83　2005/10 Publisher: The Nihon Kogyo Shimbun ISSN：0285-5437 Written Options of Third Parties Toshihiko Nakata Environmental Acotion Report　2005　44　2005/08 Publisher: Tohoku Electric Power Co. Feasibility study of integrated renewable energy systems with hydrogen energy storage TADA Manabu, NAKATA Toshihiko Proceedings of the Annual Meeting of Japan Society of Energy and Resources　24　65-68　2005/06/09 Publisher: エネルギー・資源学会 ISSN：1881-9907 廃棄物処理システムの最適化・経済性評価 T. Nakata OHM　92　(2)　1-27　2005/02/12 Publisher: Ohmsha 産業部門エネルギー管理手法の日米比較 野田冬彦, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 発展途上国農村部におけるエネルギー・アクセス向上のためのエネルギー・システムの設計 金川誠, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 環境効率に基づく環境経営度の評価と課題 猪刈正利, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 再生可能エネルギー利用技術の習熟曲線 風力発電建設費のケーススタディ 佐藤健実, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 水素エネルギー貯蔵を考慮した地域総合エネルギーシステムの設計 多田学, 中田俊彦 エネルギー・資源学会研究発表会講演論文集　24th　2005 ISSN：1880-1099 地域再生可能エネルギーシステムの最適設計と広域バイオマス利活用 伊藤吉紀, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 タイのエネルギー部門におけるDSMによるCO₂削減効果の検討 RATANANAKORN M, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 ”Mechanical engineering yearly book”. 8. Thermodynamics. 小沢守, 馬場哲也, 吉田英生, 石塚勝, 長谷川達也, 中田俊彦, 佐藤幹夫 日本機械学会誌　108　(1041)　2005 ISSN：0021-4728 地域エネルギー・経済モデルを用いた岩手県におけるDSMの経済性評価 芦名秀一, 中田俊彦, 松本文雄, 菅原龍江, 菊池伸雄, 大村博之 エネルギーシステム・経済・環境コンファレンス講演論文集　21st　2005 バイオマスを考慮した地域総合エネルギーシステム 中田俊彦 電気学会電子・情報・システム部門大会講演論文集(CD-ROM)　2005　2005 機械工学年鑑 T. Nakata Journal of the Japan Society of Mechanical Engineers　108　(1041)　630-631　2005 Publisher: Japan Society of Mechanical Engineers DOI： 10.1299/jsmemag.108.1041_630_2 　 ISSN：0021-4728 The study of CO_2 emission control policy and its economic impact : Case study in Thailand using energy-economic model MATCHANTIKA Ratananakorn, NAKATA Toshihiko 20　13-16　2004/01/29 中国のCO₂排出量削減に向けたエネルギー・経済モデルによる分析 塔ケ崎哲也, 芦名秀一, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 循環型社会の形成に向けたバイオマス資源の地域エネルギー利用戦略 久保一雄, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 地域自然エネルギーシステムの導入による経済波及効果の試算 伊藤吉紀, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 地域エネルギー・経済モデルを用いた岩手県における環境税導入の影響評価 芦名秀一, 中田俊彦, 松本文雄, 菅原龍江, 菊池伸雄, 千葉紀穂, 鳥羽良明 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 エネルギー需要特性を考慮した自然エネルギーシステムの公共施設への導入 多田学, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 木質バイオマスエネルギー利用の経済性および導入促進政策の検討 八木賢治郎, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 廃棄物処理の最適システム設計と経済性評価 浦辺理郎, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 クリーンコール技術導入の経済性評価と導入推進オプションの検討 佐藤健実, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　20th　2004 非線形エネルギー経済モデルによる小型原子炉・自然エネルギー連系システムの設計研究 中田俊彦, ラモント アラン, シントン ジョナサン 日本原子力研究所JAERI-Conf　2004 Lounge T. Nakata Energy and Resources　24　(3)　101-101　2003/05/05 Publisher: Japan Society of Energy and Resources 小型原子力発電所の導入可能性のシミュレーションモデルによる解析 芦名秀一, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　19th　2003 韓国のエネルギー需要とCO₂削減のための政策オプション 金川誠, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　19th　2003 地域エネルギー・経済モデルの開発と岩手県環境政策オプションの検討 芦名秀一, 中田俊彦, 酒井晃二, 菅原龍江, 菊地伸雄, 千葉紀穂, 鳥羽良明 エネルギーシステム・経済・環境コンファレンス講演論文集　19th　2003 クリーンコール技術の導入についての経済性評価と推進オプションの検討 衣笠良, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　19th　2003 循環型社会の実現に向けた廃棄物のエネルギー利用及び経済性の検討 浦辺理郎, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　19th　2003 燃料電池自動車導入に伴う運輸部門エネルギーシステムへの影響 衣笠良, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　18th　2002 水素利用カーボンレス・エネルギーシステムの統合評価 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　18th　2002 地域需要を考慮した最適電源計画モデルに関する研究 芦名秀一, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　18th　2002 米国ローレンス・リバモア国立研究所に仲間入りして T. Nakata JITA News　(386)　10-13　2001/12/01 Publisher: Japan Industrial Technology Association Assessing the carbon tax by introducing the effects of technology innovation in energy-economy model. 池田征寛, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　17th　2001 Sensitive analysis of energy-economy model introducing discontinuity. 芦名秀一, 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　17th　2001 機上にて T. Nakata 会誌　36　72-73　2001/01/01 Publisher: 山岡育英会 Effect of nuclear power plant phase-out on carbon dioxide emission reduction. 中田俊彦, 渡辺裕 エネルギーシステム・経済・環境コンファレンス講演論文集　16th　2000 遠くて近い国 T. Nakata 会誌　35　58-59　2000/01/01 Publisher: 山岡育英会 Reduction effect of carbon dioxide discharge by carbon tax and the energy tax. 中田俊彦 エネルギーシステム・経済・環境コンファレンス講演論文集　15th　1999 英語で損をしないために T. Nakata 会誌　33　45-46　1998/01/01 Publisher: 山岡育英会 Next generation-Global ecology life cycle modeling T. Nakata The Murata Science Foundation, Annual Report　11　336-337　1997/01/01 Publisher: The Murata Science Foundation 親子三代、学究の道へ T. Nakata CRIEPIA　262　22-22　1995/10 Publisher: Central Research Institute of Electric Power Indystry 石炭ガス化低カロリー燃料用1500℃級ガスタービン燃焼機の研究開発 T. Nakata 調査研究分科会成果報告書　P-SC214　115-121　1995/10 Publisher: 日本機械学会 途上国が日本に期待するもの T. Nakata 地球環境研究センターニュース　6　(7)　8-9　1995/10/01 Publisher: National Insitute for Environmental Studies ガスタービン燃焼器のフュエルNOx生成特性とその低減 T. Nakata Journal of the Combustion Society of Japan　97　(97)　11-23　1994/07 Publisher: Combustion Society of Japan ISSN：0286-6501 Development of 1500°C class gas turbine combustor for coal gasification.2 Trial manufacture of 1500°C class combustor and performance evaluation thereof. 二宮徹, 佐藤幹夫, 長谷川武治, 中田俊彦 ガスタービン定期講演会講演論文集　22nd　(22)　63-70　1994/05/10 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 ガスタービン技術 Toshihiko Nakata Denchuken Review　30　32-34　1994/04 Publisher: Central Research Institute of Electric Power Indystry Research on the decomposition of ammonia in coal gasification fuel gas.2.Effect of a combustible component in the fuel on ammonia decomposition. 長谷川武治, 佐藤幹夫, 中田俊彦 燃焼シンポジウム講演論文集　32nd　1994 A-9 石炭ガス化用1500℃級ガスタービン燃焼器の開発 : 水流モデル可視化手法による燃焼器構造の検討(燃焼III) 二宮 徹, 中田 俊彦, 長谷川 武治, 佐藤 幹夫 ガスタービン秋季講演会講演論文集　1993　(5)　61-68　1993/09/27 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1968 NO_x generation character of medium calorie fuel by coal gasification. 中田俊彦, 佐藤幹夫, 長谷川武治 燃焼シンポジウム講演論文集　31st　1993 Application of Reaction Kinetics to Gas Turbine Combustor. 中田俊彦, 佐藤幹夫, 長谷川武治 日本機械学会計算力学講演会講演論文集　6th　1993 ISSN：1348-026X Research on the decomposition of ammonia in coal gasification fuel. 中田俊彦, 佐藤幹夫, 長谷川武治 燃焼シンポジウム講演論文集　30th　1992 B-6 石炭ガス化用ガスタービン燃焼器の高圧燃焼器特性 中田 俊彦, 佐藤 幹夫, 二宮 徹, 芳根 俊行, 山田 正彦 ガスタービン定期講演会講演論文集　(19)　129-136　1991/05/20 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 Numerical simulation of the flow of a gas turbine combustor for coal gas. 中田俊彦, 佐藤幹夫, 三浦正一, 佐藤衣代 燃焼シンポジウム講演論文集　29th　1991 B-8 石炭ガス化用ガスタービン燃焼器の開発(第2報) : 空気制御型燃焼器による低NO_x燃焼技術 二宮 徹, 中田 俊彦, 佐藤 幹夫, 万代 重実, 佐藤 亘男 ガスタービン秋季講演会講演論文集　(2)　159-166　1990/10/20 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1968 B-1 石炭ガス化燃料の燃焼反応解析 : 第2報 フュエルNO_x生成機構の検討 山内 浩二, 佐藤 幹夫, 中田 俊彦 ガスタービン定期講演会講演論文集　(18)　95-102　1990/05/10 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 A-1 石炭ガス化用ガスタービン燃焼器の開発 : 空気制御型燃焼器の基本特性 中田 俊彦, 佐藤 幹夫, 二宮 徹, 萬代 重実, 佐藤 亘男 ガスタービン秋季講演会講演論文集　1-8　1989/10/05 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1968 B-8 石炭ガス化燃料組成がNO_x排出特性に及ぼす影響 佐藤 幹夫, 山内 浩二, 中田 俊彦, 阿部 俊夫, 芳根 俊行, 山田 正彦, 檜佐 彰一, 長谷川 宏 ガスタービン定期講演会講演論文集　(17)　151-158　1989/05/10 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 B-7 石炭ガス化燃料の燃焼反応解析 : 第1報 サーマルNO_x排出特性 中田 俊彦, 佐藤 幹夫, 山内 浩二 ガスタービン定期講演会講演論文集　(17)　143-150　1989/05/10 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 Burning characteristics of coal gasification fuel.The effect of methane concentration on NO_x discharge characteristics. 山内浩二, 佐藤幹夫, 中田俊彦 燃焼シンポジウム講演論文集　27th　1989 Basic combustion characteristics of low-calorie fuel obtained by coal gasification. 中田俊彦, 佐藤幹夫, 山内浩二 ガスタービン定期講演会講演論文集　16th　(16)　1-7　1988/05/09 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 Research on the low NOx combustion method for gas turbine combustors used in coal gasification. 1. Characteristics of the basic type combustor. 佐藤幹夫, 阿部俊夫, 二宮徹, 中田俊彦, 芳根俊行, 山田正彦, 桧佐彰一, 長谷川宏 ガスタービン定期講演会講演論文集　16th　(16)　9-16　1988/05/09 Publisher: 公益社団法人日本ガスタービン学会 ISSN：0919-1941 Reaction analysis of ammonia decomposition in coal gasification fuel. 2. Additive effects of nitrogen oxides. 山内浩二, 佐藤幹夫, 中田俊彦 燃焼シンポジウム講演論文集　26th　1988 Reaction analysis of ammonia decomposition in coal gasification fuel. 1. Ammonia decomposition by oxygen. 佐藤幹夫, 中田俊彦, 山内浩二 燃焼シンポジウム講演論文集　26th　1988 Study on low carolific gas combustion. (Part 4). 中田俊彦, 佐藤幹夫, 山内浩二 電力中央研究所横須賀研究所報告　(W87030)　1988 Emission characteristics of NO_x and combustibles in ash accompanying pulverized coal combustion. 2. Emission characteristics in mixed coal combustion. 佐藤幹夫, 牧野尚夫, 中田俊彦, 二宮徹 燃焼シンポジウム講演論文集　25th　1987 Emission characteristics of NO_x and combustibles in ash accompanying pulverized coal combustion. 1. Influence of coal properties. 中田俊彦, 佐藤幹夫, 牧野尚夫, 二宮徹 燃焼シンポジウム講演論文集　25th　1987 Show all ︎Show first 5 Books and Other Publications 21 Advances in Steam Turbines for Modern Power Plants, 2nd Edition Tadashi Tanuma, Toshihiko Nakata Elsevier　2022/07/29 DOI： 10.1016/C2020-0-01671-3 　 ISBN: 9780128243596 More details Close The steam turbine has been a key component in electrical power generation since the 19th century, as one of the distinctive outcomes of the industrial revolution. In this chapter, we will show the method of cost evaluations and how they change with time. As well as depreciation accounting, diversification of society’s needs leads to better innovation and raises the level of technology. The concept of technological learning is explained to find out how much costs decline with the popularization of technologies. Some generating technologies use similar components and these components learn at the same rate as these units are built. Technological progress mainly depends on three learning sources: learning-by-doing, research and development activity, and knowledge spillover. Sustainable Energy Systems: Efficiency and Optimization Alan Brent, Toshihiko Nakata MDPI　2022/02 ISBN: 9783036515861 More details Close New, alternative energy technologies are rapidly becoming affordable, and it is expected that these will be immensely disruptive to our traditional mode of centralised energy generation, transmission, and distribution. Additionally, the severe climate (and other) impacts of many traditional energy generation and utilisation techniques are widely accepted. As stated in the World Energy Outlook of the International Energy Agency (IEA), “the global energy scene is in a state of flux, thrown off balance by falling costs for a range of technologies, led by wind and solar. . . ”. Furthermore, the IEA states that it “. . . expects renewable electricity generation to increase by a further two-fifths by 2021. However, renewable heat and transport are lagging behind, despite good potential. . . ”. For these changes or transitions to be just and sustainable, systemic analyses are required, with an emphasis on optimizing the energy sector to be better integrated with the other sectors of the economy, thereby ensuring the efficiency of future energy value chains. Such systemic analyses utilise concepts, methods and tools such as system dynamics, urban metabolism, industrial ecology, and life cycle analyses, to inform policy- and decision-making. This book is a collection of papers from a Special Issue in the journal Energies, with contributions from researchers across the globe. The book provides insights to scholars on how the concepts, methods and tools of systemic analyses have been utilised in various contexts—from the household and community level, to industrial and utility-scale levels—to enable a transition to sustainable energy systems, with an emphasis on the efficiency and optimisation of future energy value chains. Hybrid Technologies for Power Generation Toshihiko Nakata Elsevier　2021/11/26 ISBN: 9780128237939 More details Close Hybrid Technologies for Power Generation addresses the topics related to hybrid technologies by coupling conventional thermal engines with novel technologies, including fuel cells, batteries, thermal storage and electrolysis, and reporting on the most recent advances concerning transport and stationary applications. Potential operating schemes of hybrid power generation systems are covered, highlighting possible combinations of technology and guideline selection according to the energy demands of end-users. Going beyond state-of-the-art technological developments for processes, devices and systems, this book discusses the environmental impact and existing hurdles of moving from a single device to new approaches for efficient energy generation, transfer, conversion, high-density storage and consumption. Energy Use Efficiency Fernando Enzo Kenta Sato, Toshihiko Nakata MDPI　2021/05 ISBN: 9783036503547 More details Close This is a reprint of articles from the Special Issue published online in the open access journal Energies (ISSN 1996-1073) (available at: https://www.mdpi.com/journal/energies/special issues/Energy Use Efficiency). EcoDesign and Sustainability I Fernando Enzo Kenta Sato, Toshihiko Nakata Springer　2020/11 DOI： 10.1007/978-981-15-6779-7_22 　 ISBN: 9789811567780 More details Close The aim of this study is to propose a dynamic model for forecasting the changes in the number of batteries recovered from end of life electric vehicles considering different power trains. To achieve a sustainable society, the dependency of the energy on fossil fuels must be overcome. One of the first steps to manage this objective is through the reduction of its direct consumption by the wide-scale adoption of EV (HV/PHV/BEV/FCV). Low cost and stable production of lithium ion batteries (LiB) are expected to be a key element for the electrification of the transportation. For this reason, an efficient cascade use of electric vehicle batteries (EVB) to minimize its raw material supply risk, disposal risk, environmental impact and material cost/consumption in its production process become essential. Additionally, by the promotion of a closed loop life cycle, cost reduction in the end of life batteries treatments can be also expected. However, to grab this opportunity and create a sustainable market, balance between the demand and recoverability of LiB must be clarified to propose reliable second life projects. This study proposes a method based on system dynamics modeling for forecasting the vehicle fleet, sales and end of life vehicles by power train considering data of scrapping rates of vehicles by year of use. Moreover, the supply potential of scrapped batteries from a reverse logistic scheme is analyzed. Here, the Japanese vehicle market is considered as a case study and a timeframe of 2018 to 2050 forecasted. Results indicate that the amount of scrapped EVB will increase 45 times from 2020 to 2050. Moreover, a complete closed loop of them can be expected around 2050 only if the exportation of used electric vehicles is hardly diminished. Advances in Steam Turbines for Modern Power Plants T. Tanuma, Ed, T. Nakata Elsevier/ Woodhead Publishing　2017/01 ISBN: 9780081003145 More details Close pp. 93-106 Rebirth or Extinction?: Post-quake Recovery Process at a Crossroad K. Hasegawa, T. Hobo, H. Ozaki, K. Seki, T. Katayama, H. Obitani, N. Ishida, M. Nakagawam, T. Tachibana, Toshihiko Nakata, T. Honma, Y. Itakura, K. Tsuchida University of Tokyo Press　2016/06 ISBN: 9784130561105 More details Close Five years have passed since the Great East Japan Earthquake. Communities in the affected areas are facing a crisis, and &＃34;delays&＃34; in reconstruction are becoming apparent. How can local communities be revitalized? This report clarifies the issues surrounding reconstruction and proposes bottom-up policies in which local residents play a leading role. Technology Assessment Report 2023 Toshihiko Nakata MA Research Institute Inc.　2013/02 ISBN: 9784902975727 Nuclear Energy Development in Asia Toshihiko Nakata Macmillan Publishers Limited　2011/02/15 ISBN: 9780230240247 More details Close Edited by Yi-chong Xu Poverty Alleviation: 21st Century Issues and Challenges Makoto Kanagawa, Toshihiko Nakata Nova Science Publishers　2008/07/30 ISBN: 9781604560343 エネルギーの貯蔵・輸送 T. Nakata, G. Fujita NTS Books　2008/06/05 ISBN: 9784860431570 Recent Developments in Biogas Technology T. Nakata, Y. Itoh CMC Publishing CO.,LTD.　2008/06 ISBN: 9784781300290 Ohm Headline Review 2006 Toshihiko Nakata Ohmsha　2006/05/19 ISBN: 9784274500886 A window to America: Academic skils for American studies Toshihiko Nakata Hobundo　2003/01/23 ISBN: 4832301179 Asian Economic and Political Issues, 5 Toshihiko Nakata NOVA Science Publishers　2002/10 ISBN: 1590333020 Energy Research at the Cutting Edge Toshihiko Nakata NOVA Science Publishers　2002/10 ISBN: 1590334809 Competition in electricity markets, Energy market reform Toshihiko Nakata 2002/09 ISBN: 4906445144 Should we risk it? Toshihiko Nakata Springer Verlag Tokyo　2001/12/04 ISBN: 4431709363 CO2削減に向けた次世代エネルギー技術ハンドブック Toshihiko Nakata Realize Science and Engineering　2001/05/31 ISBN: 4898080308 The limits to certainty Ken Sasaki, Kiyoshi Shibata, Toshihiko Nakata JUSE Press　2000/05/01 ISBN: 4817191058 Faktor Vier Ken Sasaki, Toshihiko Nakata The Energy Conservation Center, Japan　1998/05 ISBN: 4879731846 Show all Show first 5 Presentations 425 Hard-to-abate sector decarbonization transitions based on Japan Energy Database Invited Toshihiko Nakata The 174th Annual Meeting of the Japan Institute of Metals and Materials　2024/03/13 Distribution characteristics of woody biomass potential by municipality based on bottom-up estimation Ryoga Ono, Remi Delage, Toshihiko Nakata The 135th Annual Meeting of the Japan Forest Society　2024/03/10 More details Close In this study, bottom-up estimation was conducted for each municipality using the product-up method based on the wood biomass potential of each sub-group and forest group from the forest GIS. In order to take forest growth into account, four growth curves were curve-fitted for each tree species, and the curve with the highest coefficient of determination was selected for the estimation method. The input data used were forest GIS data for national forests from the National Land Survey Data and forest GIS data for private forests from prefectural forest registers and forest planning maps. These forest GIS were combined to create a dataset. Missing data in the combined data set was supplemented with forest area data and administrative district data from the National Land Survey Data. Only planted forests were targeted, excluding restricted forests. The number of thinning was fixed at two times, and the harvesting period was assumed to be the year of the maximum desired land value, 60 years, and 80 years, based on the Faustmann equation. The results of these estimations were used to perform a hierarchical clustering analysis of the municipalities in which the target forests were located, using the percentage of tree species as a characteristic quantity. In addition, spatial characteristics were analyzed using the Moran I statistic, a spatial autocorrelation measure, with wood biomass potential per unit forest area as the characteristic quantity. This allowed us to investigate the distribution characteristics of woody biomass potential by municipality. Analysis of Regional Demand Response by Data Center International-coauthorship Hiroki Naoi, Remi Delage, Toshihiko Nakata General Conference, The Institute of Electronics, Information and Communication Engineers (IEICE)　2024/03/07 Spatio-temporal charging demand analysis of electric vehicles using mobile location data International-coauthorship Takanori Aiko, Remi Delage, Toshihiko Nakata General Conference, The Institute of Electronics, Information and Communication Engineers (IEICE)　2024/03/07 Using temporal aggregation to reduce computational needs of near-optimal feasible space of renewable energy system models International-coauthorship Eva Simarik, Rémi Delage, Toshihiko Nakata The 40th Conference on Energy Systems, Economics, and the Environment　2024/01/31 Design of an Integrated Energy System in Palestine International-coauthorship Mahdi Abuhomos, Rémi Delage, Toshihiko Nakata The 40th Conference on Energy Systems, Economics, and the Environment　2024/01/31 Resilience oriented optimization framework for solar district heating systems International-coauthorship Thomas Boutron, Rémi Delage, Toshihiko Nakata The 40th Conference on Energy Systems, Economics, and the Environment　2024/01/31 Analysis of Data Center Demand Response with Load Shifting in Space and Time Hiroki Naoi, Delage Remi, Toshihiko Nakata The 40th Conference on Energy Systems, Economics, and the Environment　2024/01/31 Design and analysis of decarbonized energy system integrated 1,741 municipalities Hiroaki Onodera, Delage Remi, Toshihiko Nakata The 40th Conference on Energy Systems, Economics, and the Environment　2024/01/30 Theory and practice of energy design to drive decarbonization Toshihiko Nakata Iwate Prefectural Assembly Special Committee for Investigating Decarbonized Society　2024/01/11 Sustainable Local Energy: Toward an Integrated System Design and Analysis Invited Toshihiko Nakata Fourth Carbon Neutral Information Report Meeting　2023/12/21 Theory and practice of energy design to drive decarbonization Invited Toshihiko Nakata The 9th Green Seeds Workshop　2023/12/08 Development of a method for estimating woody biomass potential by multiplying considering long-term forest growth Ryoga Ono, Remi Delage, Toshihiko Nakata 19th Biomass Science Conference　2023/12/07 How to create a carbon neutral society using local renewable energy Invited Toshihiko Nakata The 6th Gathering of the Future Environment　2023/11/25 More details Close Purpose of the meeting: In November 2020, Kiryu City made a declaration of &＃34;Kiryu, the City of Slow Zoom&＃34;, aiming to create an environmentally friendly city through the use of &＃34;slow mobility&＃34; and a lifestyle that encourages a &＃34;slow life&＃34;. The Kiryu City Environmentally Advanced City Future Vision Promotion Council has been discussing ways to promote regional development based on this declaration. In this meeting, we would like to introduce our activities for this year and discuss how to proceed in the future. Theory and practice of energy design to drive decarbonization: The Mission of Regional Energy Companies Learning from the European Stadtwerke Invited Toshihiko Nakata Nakadomari Town Renewable Energy Adoption Strategy Development Committee for Realization of Decarbonization　2023/11/01 Enriching Lives by Going Carbon Neutral Invited Toshihiko Nakata Carbon Neutral Expo in Kooriyama　2023/10/22 Theory and practice of energy design to drive decarbonization International-presentation Invited Toshihiko Nakata 4DH Forum International Symposium　2023/10/20 More details Close The shift to 100% renewable energy is beginning to progress in regions amid the global decarbonization movement. European countries such as Denmark were among the first to introduce smart energy systems such as decentralized district heat supply for smart energy use in their regions, and were among the first to make the energy transition to 100% renewable energy. At this international symposium, we will hear from Professor Henrik Lund, a leading international expert on the specifics of Europe&＃39;s advanced 4th generation district heat supply and smart energy systems, and share information on the frontlines of decarbonization of district energy in the world, as well as on local decarbonization efforts in Japan. The session will also include information sharing and discussion on the frontlines of regional energy decarbonization in the world and efforts to decarbonize regions in Japan. Theory and practice of energy design to drive decarbonization Invited Toshihiko Nakata Corporate Seminars　2023/09/28 Theory and Transition Strategies for Energy System Design to Drive Decarbonization Invited Toshihiko Nakata Corporate Seminar　2023/09/21 Driving Decarbonization Theory and Practice of Energy Design Invited Toshihiko Nakata Matsumotaira Zero Carbon Consortium 7th Regular Forum　2023/09/19 Creating a carbon-neutral society based on a regional energy supply and demand database Invited Toshihiko Nakata Iwaizumi Town Hall Social gathering　2023/09/08 Theory and Transition Strategies for Energy System Design to Drive Decarbonization Toshihiko Nakata Corporate Seminar　2023/09/05 How to create a carbon-neutral society based on a regional energy supply and demand database Invited Toshihiko Nakata The 21st Social Implementation Cooperative Research Meeting, Gunma University　2023/08/28 Regional design of carbon neutral society using Japan Energy Database Invited Toshihiko Nakata Practical Education Research and Presentation Meeting 2023 Miyagi　2023/08/19 Decarbonized Future Achieved by Renewable Energy and Community Implementation Invited Toshihiko Nakata Japan Finance Corporation Training　2023/07/21 Community Energy System Design Invited Toshihiko Nakata Aoba Industrial Association Miyagi Branch General Meeting　2023/06/03 Energy Model for a Carbon-Neutral Society International-presentation Invited Toshihko Nakata Automotive Engineering Exposition 2023　2023/05/25 Sustainable Strategies for Energy Systems Using Japan Energy Database Invited Toshihiko Nakata The Latest Technological Trends in Living and Manufacturing for the Formation of Sustainable Communities　2023/05/12 Strategic design of energy systems based on Japan Energy Database Invited Toshihiko Nakata Special Program for the Annual General Meeting of Members in FY2022 (100th) How far can Japan go in energy self-sufficiency?　2023/04/20 Design and decarbonization of local energy systems Invited Toshihiko Nakata 4DH Forum 6th Online Seminar　2023/03/27 Decarbonized Future and Local Community Innovation Created by Digital Information Infrastructure Invited Toshihiko Nakata ECHONET Symposium 2023　2023/03/22 More details Close Visualization of regional energy supply and demand data as energy flow. - Quantitative evaluation of regional energy systems based on integrated indicators such as energy self-sufficiency, CO2 emissions, and energy economic income and expenditure. Community and Carbon Neutral Invited Toshihiko Nakata Tohoku Economic Federation　2023/03/20 Goals of manufacturing companies with carbon neutrality as a tailwind Invited Toshihiko Nakata Miyagi Industrial Association Workshop　2023/03/07 Carbon neutral strategies for energy systems through data centers and P2P trading Invited Toshihiko Nakata JST OPERA &＃34;The 2nd Public Symposium&＃34;　2023/02/24 Carbon neutral strategy for energy systems based on Japan Energy Database Invited Toshihiko Nakata Japan Petroleum Institute, New Energy Division Lecture Meeting　2023/02/21 Planning for a decarbonization strategy based on the Japan Energy Database Invited Toshihiko Nakata The 1st Zero Carbon Study Session of the Saku Regional Union&＃39;s Environment Subcommittee　2023/02/16 Selection of power curves for onshore and offshore wind power generation models considering wind speed distribution across Japan International-coauthorship Taichi Matsuoka, Remi Delage, Toshihiko Nakata The 39th Conference on Energy Systems, Economics, and the Environment　2023/01/26 An Analysis of the Effects in Allocation and Load Shifting of Data Centers in Japanese Power System International-coauthorship Hiroki Naoi, Hiroaki Onodera, Kazuyoshi Nemoto, Remi Delage, Toshihiko Nakata The 39th Conference on Energy Systems, Economics, and the Environment　2023/01/26 An Analysis of the Effects of P2P Transaction Frequency at Electricity Trade amongst Residential Households International-coauthorship Yudai Morita, Remi Delage, Toshihiko Nakata The 39th Conference on Energy Systems, Economics, and the Environment　2023/01/26 Development of a Machine Learning Method for Estimating Electricity Demand by Municipality International-coauthorship Yoshiki Kusumoto, Remi Delage, Toshihiko Nakata The 39th Conference on Energy Systems, Economics, and the Environment　2023/01/26 Nonlinear optimization of combined heat and power systems in district heating networks in northern Japan International-coauthorship Delubac Régis, Toshihiko Nakata The 39th Conference on Energy Systems, Economics, and the Environment　2023/01/26 More details Close To accelerate the transition toward zero net carbon emissions, developing the technologies which are already mature enough to be integrated technologically and economically in existing system is essential. Most of the recent studies are focusing on large scale energy systems which require lot of assumptions to be studied (Linear Approach). This paper presents the economical optimization of combined thermal and electrical supply of a city in Hokkaido through utilization of district heating network. A nonlinear approach is used to consider phenomena’s such as combustion efficiencies or effect of scale. Different technologies of combined heat and power are modelled with different properties and fuels such as gas, household wastes and biomass. Other electrical sources are considered as solar, wind or hydraulic power. The optimization objective function is to minimize costs by considering the current costs of energies. With each boiler modelled and sized, optimization results show the interest to use renewable energies especially biomass power, which is widely available in northern Japan, to at the same time reduce the costs and increase the use of renewable energies. Zero carbon design using Japan energy database Invited T. Nakata The 11th meeting of the Energy Research Division of the Operations Research Society of Japan　2023/01/20 A decarbonized future achieved by renewable energy and its implementation in local communities Invited Toshihiko Nakata Green Seeds Research Group　2023/01/19 Exploring Challenges and Future Directions for Biomass Industrial Heat Use Toward Carbon Zero in 2050 International-presentation Invited Toshihiko Nakata International Symposium on Biomass Industrial Heat　2023/01/13 More details Close While 55% of Japan&＃39;s heat demand is for medium- to high-temperature heat for industrial use, the renewable energy sources that can supply medium- to high-temperature heat are currently almost exclusively biomass, and it is considered important to direct the limited biomass fuels toward industrial heat in order to decarbonize the country in the future. Under the theme of &＃34;Exploring Challenges and Future Directions for Biomass Industrial Heat Utilization Toward Carbon Zero in 2050,&＃34; the conference aims to provide an opportunity to accelerate future efforts by inviting overseas guests to gather and discuss the knowledge of those involved. Carbon neutral strategy based on regional energy supply and demand database Invited Toshihiko Nakata Tohoku University Energy Symposium　2022/12/05 More details Close Reducing carbon dioxide emissions, the cause of global warming, is an urgent priority. While it is important for local communities to play a leading role in promoting decarbonization, at the same time, the construction of sustainable energy systems that are adapted to local needs can lead to the creation of prosperous and disaster-resistant local communities. Tohoku University has established the Center of Excellence for Interdisciplinary Research to promote various energy-related research and their social implementation. This year&＃39;s symposium will focus on the theme of the Ministry of the Environment&＃39;s initiative to create leading decarbonized regions and will introduce the outline of the leading regions that have already been adopted and their future visions, as well as the latest energy system research at the university and decarbonization plans promoted by electric power companies. Analysis of heat supply potential of woody biomass by region in consideration of business feasibility Takumi Suzuki, Kazuyoshi Nemoto, Toshihiko Nakata 18th Biomass Science Conference　2022/11/30 More details Close With the recent rise in fossil fuel prices due to the increase in global energy consumption and the international situation such as wars, expectations for renewable energy in Japan have been increasing. In particular, the utilization of biomass resources, which, unlike other renewable energies, can be used in a variety of ways, including combustion and gasification, and can be easily stored, is expected to play an important role in achieving carbon neutrality by 2050. The 18th Biomass Science Conference will be held on November 30 and December 1, 2022, as a hybrid online/on-site conference with interactive live-streaming from Maebashi City. Analysis of local energy supply and demand for woody biomass in Japanese municipalities International-presentation Kazuyoshi Nemoto, Toshihiko Nakata 69th Annual North American Meetings of the Regional Science Association International　2022/11/10 How to use the Japan Energy Database Invited Toshihiko Nakata Utilization of &＃34;Japan Energy Database&＃34; for each of the 1,741 municipalities in Japan　2022/11/01 More details Close The significance, background, composition, and utilization of regional energy supply and demand databases will be explained using online screens. Participants will learn about domestic and international energy databases and the characteristics of regional energy supply and demand through examples of each. The course provides basic skills for developing strategies to meet new societal needs, such as strengthening regional energy security and developing decarbonization plans, while deepening understanding of the scientific evidence that is important for using the database. Creating a carbon neutral strategy with a regional energy supply and demand database! International-presentation Invited Toshihiko Nakata CEATEC 2022　2022/10/18 More details Close The following are concrete steps to create a carbon-neutral plan for your community or business. First, draw an energy flow diagram of the current situation, followed by a carbon flow diagram. This will allow you to visualize the current energy supply and demand, as well as identify impediments to carbon neutrality. Second, use the simulator function to simulate the introduction of various technological elements on the screen so that you can feel the effects of their introduction ahead of time. You will realize that carbon neutrality is surprisingly complex and its achievement is not easy. Please use this program to help you develop a practical and rational carbon neutrality plan, graduating from the conventional awareness and education campaigns that have been the mainstay of environmental action. Regional decarbonization through sector coupling Invited Toshihiko Nakata 4DH Forum 5th Online Seminar　2022/10/13 Goals of manufacturing companies with carbon neutrality as a tailwind Invited Toshihiko Nakata Cutting-Edge Seminars　2022/10/03 Cluster analysis of Japanese households based on energy consumption mix International-presentation International-coauthorship Rémi Delage, Toshihiko Nakata 8th International Conference On Smart Energy Systems　2022/09/13 Renewable Energy Systems Considering Profitability of PtG and PtL - a Case Study of Japan International-presentation International-coauthorship Hiroaki Onodera, Rémi Delage, Toshihiko Nakata 8Th International Conference On Smart Energy Systems　2022/09/14 Design of a regional energy system based mainly on green power Invited Toshihiko Nakata JSME 2022 Annual Conference Cross-Cutting Theme　2022/09/12 SIP Regional Energy System Design Study and Development of Regional Energy Supply and Demand Database Invited Toshihiko Nakata 100th Anniversary Lecture of the Japan Institute of Energy　2022/09/08 Tohoku will lead Japan in the future! How to Utilize Local Resources in the Carbon Neutral Era Invited Toshihiko Nakata JCI Tohoku District Council Tohoku Youth Forum　2022/09/04 A simplified simulation of decentralized energy systems evolution Remi Delage, Toshihiko Nakata 41st Annual Meeting of the Japan Society of Energy and Resources　2022/08/09 Selection of onshore and offshore wind power generation models and estimation of power generation potential considering regional wind speed distribution Taichi Matsuoka, Remi Delage, Toshihiko Nakata 41st Annual Meeting of the Japan Society of Energy and Resources　2022/08/09 Development of a Machine Learning Method for Estimating Electricity Demand by Municipality Yoshiki Kusumoto, Remi delage, Toshihiko Nakata 41st Annual Meeting of the Japan Society of Energy and Resources　2022/08/09 Development of an estimation method for forest biomass potential using forest registration data by municipality Takumasa Susuki, Kazuyoshi Nemoto, Toshihiko Nakata The 31st Annual Meeting of the Japan Institute of Energy　2022/08/05 The Role of Subsidies for Carbon- Neutral Energy Systems with Sector Coupling - A Case Study of Japan International-presentation International-coauthorship Hiroaki Onodera, Rémi Delage, Kazuyoshi Nemoto, Toshihiko Nakata 43rd IAEE International Conference　2022/08/03 A Toy Model for Decentralized Energy Systems Evolution International-presentation International-coauthorship Rémi Delage, Toshihiko Nakata 43rd IAEE International Conference　2022/08/03 Carbon Neutral Society and Cars Invited Toshihiko Nakata Society of Automotive Engineers of Japan, Forum 2022　2022/07/13 More details Close This forum will consider the creation of new value and changes in technological performance in the life cycle (manufacturing, driving, and disposal) of vehicles (automobiles) from a carbon-neutral perspective. Assuming the transition to a sustainable society led by carbon neutrality, the focus will be on collaborative models that link next-generation automobiles and recycling in the new normal society. For example, industry-to-car recycling of used apparel into soundproofing material for automobiles, the establishment of networks among different industries that have been disconnected in the past, the emergence of recycling businesses where manufacturers and consumers collaborate, and the role of system integrators (SIers) in promoting such businesses will be discussed by the experts in the panel discussion. The experts will discuss the topics and panel discussion will follow. SIP Regional Energy System Design Study and Database Development Invited Toshihiko Nakata SBE Research Subcommittee of the Architectural Society of Japan　2022/06/15 Planning Methodology for Regional Decarbonization Invited Toshihiko Nakata 4DH Forum 4th Online Seminar　2022/03/22 Guidelines for regional energy system design International-presentation Invited Toshihiko Nakata The Institute of Electrical Engineers of Japan (IEEJ)　2022/03/21 How to Create a Carbon Neutral Society International-presentation Invited Toshihiko Nakata ENEX 2022　2022/01/26 More details Close The global trend toward carbon neutrality and sustainability is growing. The long-term downward trend in energy consumption will lead to a reduction in greenhouse gas emissions, and this is a good opportunity to shift from securing energy supply to focusing on quality. However, Japan&＃39;s dependence on fossil fuels remains high, and we are still searching for solutions. This lecture aims to begin with an understanding of Japan&＃39;s current situation and to provide an entry point for the design theory of a carbon-neutral society. Carbon Neutral Society and Cars Invited Toshihiko Nakata Technology Exhibition for &＃34;From Cars to Mobility&＃34;　2022/02/18 More details Close As the function of the car changes, the performance index of the car changes. The boundary of time expands from the time of driving to the entire life cycle, and the boundary of space goes back to the power generation equipment. We will consider the paradigm shift in the value of cars. Carbon Neutrality and New Lifestyles Invited Toshihiko Nakata Fukushima Citizen&＃39;s Life Exhibition 2021　2022/02/11 Nonlinear, multiscale temporal analysis of regional electricity demand International-coauthorship Remi Delage, Toshihiko Nakata The 38th Conference on Energy Systems, Economics, and the Environment　2022/01/26 Estimation and evaluation of the spatial-temporal potential ofphotovoltaic power generation Takanori Ahiko, Taichi Matsuoka, Remi Delage, Toshhiko Nakata The 38th Conference on Energy Systems, Economics, and the Environment　2022/01/26 More details Close In order to construct an energy system for a decarbonized society, it is necessary to clarify the characteristics of renewable energies such as temporal variation and spatial heterogeneity. Currently, most of the studies on estimating the potential of photovoltaic power generation in Japan are based on annual averages of solar radiation and temperature, or are limited to certain regions. These studies lack temporal and spatial accuracy, and therefore cannot fully grasp the characteristics of renewable energy. Japan has declared its intention to achieve a decarbonized society by 2050. Therefore, research with high temporal and spatial accuracy is expected to contribute to the realization of such a society. In this study, we propose a method for estimating the potential of photovoltaic power generation considering temporal changes and spatial distribution for the entire country of Japan, taking into account the effects of the zenith angle and azimuth angle of the sun at each time and location, based on 1km mesh forecast data of solar radiation every 30 minutes. Spatio-temporal Analysis of V2G Installation Potential using Mobile location Data Tetsushi Amano, Delage Remi, Toshihiko Nakata The 38th Conference on Energy Systems, Economics, and the Environment　2022/01/25 More details Close This study estimates V2G installation potential, assuming a shift to EVs for private passenger cars. The target regions of this study are a rural area (Iwate Prefecture) where people mainly travel by private car, an urban area (Kanagawa Prefecture) where public transportation is well developed, and regional city (Hiroshima Prefecture) where there is a mixture of rural area and urban areas. In order to clarify the differences in V2G installation potential between regions, we use mobile location data, which provides more accurate information on travel demand than existing surveys such as PT surveys. First, we use mobile location information to estimate the total distance traveled by cars and the number of cars. Next, under the assumption that all vehicles will be replaced by electric vehicles and V2G will be conducted, we estimate the capacity of batteries that can be used for V2G by estimating the number of vehicles traveling, which is estimated using mobile location information, and the number of parked vehicles using car ownership statistics. Finally, we will attempt to use clustering to estimate regional attributes for more accurate estimation of V2G installation potential. Keywords􀀃: Vehicle-to-Grid, Mobile location data, Travel demand, Vehicle Transportation Energy Demand Estimation Using Mobile Location Data MItsuyo Haseyama, Setsushi Amano, Remi Delage, Toshihiko Nakata The 38th Conference on Energy Systems, Economics, and the Environment　2022/01/25 More details Close Nowadays, Japan still occupies the 5th place of the carbon dioxide emissions in the world. Among the emissions, about 40% of the emission is from energy conversion sector and about 20% of the emission is from transportation sector. Therefore, power generation from renewable energy and decarbonation of the transportation sector will be important. In this study, we aim to analysis the demand of travelling cars in order to estimate the energy demand of the transportation sector (mainly vehicles) throughout Japan from the perspective of the temporal and spatial axes. Using the population information obtained from cell phones located in each base station in different areas or GPS, we analysis the flow trend of population, find how to estimate the demand of travelling cars from the demand of floating population. We focus on three areas (Iwate Prefecture, Yokohama City and Hiroshima Prefecture) of Japan and try to analysis the demand of travelling cars of the whole country by floating population of these areas. Design of interregional power network considering local renewable energy based on multi-agent simulation Tenchi Suematsu, Relage Remi, Toshihiko Nakata The 38th Conference on Energy Systems, Economics, and the Environment　2022/01/25 More details Close In this study, we constructed an agent model by simulating a power system in Japan considering an autonomous decentralized system with a simple graph structure. In this model, The Gale-Shapley algorithm was applied to the agent matching method and electricity demand and supply data for 47 prefectures in 2019 was used. Then, we evaluated the effect of equalization of supply and demand between regions, analyzed the power flow between regions, and displayed effective network structure considering the spatiotemporal dispersion of renewable energy potential. When agents are isolated from each other, the power shortage time of agents in the Tokyo metropolitan area and Osaka exceed half of the analysis target period (8760 hours). In contrast, with interregional power interchange, most of the power shortage hours can be almost eliminated in all prefectures, reducing 2169 hours to 25 hours per agent. The simulation result shows that there are regional differences in the destination and amount of flow in interconnection, and that geographical arrangement of supply and demand areas has a great influence on power interchanging behavior of agents. Energy System Optimization for Investigating Feasibility of Sector-coupling Hiroaki Onodera, Kazuyoshi Nemoto, Remi Delage, Toshihiko Nakata The 38th Conference on Energy Systems, Economics, and the Environment　2022/01/25 More details Close Energy system models with higher spatio-temporal resolution are effective for designing highly renewable energy systems and for the development of energy policies. Existing energy system models pursue macro-optimality based on system cost minimization. However, the profitability of business sector is neglected. In other words, from the perspective of business feasibility, they could be infeasible. In this study, we focus on P2G/P2L as balancing technology, and design and analyze the energy system with and without considering its profitability. First, a break-even analysis is conducted, and it is verified that the break-even can be achieved at the reference cost in 2030. Next, we developed an energy system model with profitability constraints considering the capacity factor’s lower bound. At this time, a method to express the profitability constraint as a capacity factor lower bound constraint was proposed. Finally, future energy systems with and without profitability constraints were designed. It was found that the system cost increased by 5% in the case with the profitability constraint compared to the case without profitability constraint. The energy system designed without the P2G/P2L profitability constraint was not feasible because the hydrogen production could not achieve break-even. These results indicate the importance of profitability constraints in energy system models. Keywords: Energy system model, Feasibility study, Sector-coupling, P2G, P2L Challenges in Regional Energy System Design Invited Toshihiko Nakara echno Arena Forum &＃34;Energy Value Chain and Social Mechanism　2022/01/24 More details Close Energy is the basis on which society and life are built. Since the early modern era, as the use of fossil fuels has progressed and the electric power grid has been developed, the geographical limitations of energy sources have been less of a concern, but recent energy-related issues, such as the call for carbon neutrality, show that this has been a peculiarity limited to the last two centuries. However, recent energy-related issues, such as the call for carbon neutrality, reveal that this has been a unique phenomenon limited to the last two centuries. In the end, it is hard to say whether the future of energy will develop into a more global network or return to the original local production for local consumption. In this forum, we would like to take a bird&＃39;s eye view of the issues and problems related to energy from the perspective of integrating society and technology, using the relationship between energy and society as a starting point, together with the participants. Designing Regional Energy Systems Invited Toshihiko Nakata Fukushima Innovation Coast Initiative Symposium　2021/12/11 How to Design a Carbon Neutral Society Invited Toshihiko Nakata CEATEC 2021　2021/10/19 Optimal design of interregional power interchange network considering renewable energy based on Multi-Agent Simulation Tenchi Suematsu, Remi Delage, Kazuyoshi Nemoto, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/03 More details Close There are few studies on the bottom-up design of grid interconnection for wide-area operation of the grid to cope with the output fluctuation and unevenness of the potential of variable renewable energy. The purpose of this study is to design an electric power network that takes into account the output fluctuations of solar and wind power, and to design an electric power interconnection network among 10 regions in Japan that reflects the supply and demand of renewable energy on an hourly basis based on multi-agent simulation. Estimation of Woody Biomass Potential by Municipality considering sustainability Kazuyoshi Nemoto, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/03 More details Close In order to promote the introduction of renewable energies in the region for the construction of a decarbonized society, it is important to understand the amount of woody biomass that exists and the amount that can be used. However, the amount of woody biomass available for use by region has not been estimated for the whole country. In this study, we estimated the amount of woody biomass available and the amount of woody biomass that can be used in municipalities across Japan by using the proportional distribution method by tree species based on the statistical data of prefectures, and compared the amount of woody biomass available by changing the conditions of forest road networks. Estimating electricity demand profiles from smart meter meshed data using independent component analysis International-coauthorship Delage Remi, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/03 More details Close Detailed energy demand data allows for more accurate and complex energy systems design including concepts such as districtheating or peer to peer energy sharing, but the availability of smart meters data faces privacy problems. While individual smart metersdata can be exploited with machine learning algorithms such as clustering, geographically aggregated data makes difficult thepartitioning of energy demand profiles. The present study suggests the use of independent component analysis to extract demandprofiles from smart meters meshed data. Based on data from Yokohama city in Japan, we try to identify the optimal number of demandpatterns to look for, interpret them, and analyze their geographical repartition. Scenario of Transition to a Decarbonized Manufacturing Industry Utilizing Renewable Energy Kenta Kosaka, Kazuyoshi Nemoto, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/03 More details Close In this study, we design an energy system that simultaneously considers energy and non-energy use in the steel, chemical, and ceramic industries for a decarbonized society. We analyze the hourly balance of energy supply and demand, and estimate energy consumption based on the demand and operating rates of products in each industry. We propose a decarbonized manufacturing industry that minimizes CO₂ emissions using a linear programming model based on the time variability of renewable energy considering regional characteristics. Estimatio of Regional heat and Electricity Demand and Creation of a National Database Yoshiki Kusumoto, Delge Remi, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/03 More details Close The purpose of this project is to estimate the heat and electricity demand by region and time throughout Japan, and to create a database. The heat demand of the region was estimated by multiplying the total floor area by building use on the detailed map by the unit of intensity, and then estimating the heat demand in 250m mesh units. The electricity demand of the region was calculated by dividing the hourly demand of 10 major electric power companies by the population ratio. The results were used to create a prototype national database of the regional characteristics of consumers, which is important for designing a carbon-neutral energy system. Potential mapping of onshore/offshore wind and solar PV considering time variability Taichi Matsuoka, Delage Remi, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/03 More details Close In order to construct an energy system for a decarbonized society, it is necessary to take into account the spatial unevenness and temporal variability of wind and solar resources. The current renewable energy potential data (REPOS) is limited to annual average data for both wind and solar power, and does not represent temporal variability. In this study, we use hourly meteorological forecast data on a 5 km mesh to generate potential maps of onshore and offshore wind and solar power in Japan, taking into account spatial maldistribution and temporal variability. Estyimation of V2G Installation Potential Using Mobile Phone Location Data Tetsushi Amano, Toshihiko Nakata The 40th Annual Meeting of the Japan Society of Energy and Resources　2021/08/02 More details Close In this study, we estimate the decarbonization effect of the energy system associated with the introduction of V2G in anticipation of the transition to EVs. The analysis will be conducted in a mountainous area (Iwate Prefecture) where people mainly travel by private car, and in an urban area (Yokohama City) where public transportation is well developed. The current vehicle travel routes are estimated using location data obtained from cell phones, and the decarbonization effects associated with the shift to EVs and the potential for V2G introduction are clarified. Creating value in automobile recycling based on the &＃34;SDGs: Responsibility to Create, Responsibility to Acquire Invited Toshihiko Nakata The Society of Automotive Engineers of Japan, Forum　2021/07/08 More details Close We will consider the creation of new values and changes in the technical performance requirements for automobile recycling from the perspective of Goal 12 of the Sustainable Development Goals (SDGs), &＃34;Responsibility to Create Responsibility to Acquire. For example, from old apparel to automobile soundproofing. For example, industry to car recycling, which is the reuse of old apparel into soundproofing materials for automobiles, the establishment of networks between different industries that have been disconnected in the past, the rise of recycling businesses in which manufacturers and consumers work together, and the role of system integrators (SIers) in encouraging this. These topics will be discussed through expert presentations and panel discussions. Designing Local Energy Systems for a Decarbonized Society Invited Toshihiko Nakata Kick-off Event for the New Environmental Basic Plan and the Action Plan for Realizing a Decarbonized Society　2021/06/29 More details Close The purpose of this event is to effectively and impressively inform citizens, businesses, etc. about the direction and ideas of the new environmental policies in the &＃34;Fukushima City Basic Environmental Plan&＃34; and &＃34;Fukushima City Action Plan for Realizing a Decarbonized Society&＃34; formulated in February 2021. 4DH Forum International Online Seminar International-presentation Invited Toshihiko Nakata 4DH Forum International Online Seminar #3　2021/06/24 More details Close The 4DH (4th Generation District Heat Supply) Forum has been holding online seminars on domestic and international efforts and prospects on the theme of next-generation district heat supply and smart energy systems to promote decarbonization of the heat sector and the shift to renewable energy. In this seminar, we will introduce the latest case study in Denmark in conjunction with the release of the Japanese translation of the &＃34;White Paper on District Heat Supply 2020&＃34; (State of Green), which introduces the forefront of district energy supply in Denmark and other countries in Europe that are making cutting-edge efforts toward decarbonization. Spatiotemporal wind energy potential estimation and analysis in Japan International-presentation International-coauthorship Taichi Matsuoka, Tetsushi Amano, Remi Delage, Toshihiko Nakata EGU General Assembly 2021,　2021/04/30 More details Close For an efficient integration of wind and solar resources toward sustainable energy systems, it is crucial to consider their fluctuations in space and time. Current spatial wind potential estimations in Japan are limited to the annual average of wind speed. In this study, we evaluate the spatial and temporal evolution of both onshore and offshore wind energy potential in Japan based on 5 km mesh and 1-hour sampling weather forecast data. We then demonstrate the benefits of cross-border sharing on the power output stability and identify important sites having high average potential and low average correlation with other sites for the temporal smoothing of power output. Guidelines for Community Energy System Design in the Zero Carbon Era Invited Toshihiko Nakata Energy Human Resources Upgrading Seminar　2021/02/09 Estimating Passenger Vehicle Energy Consumption by Region Using Multiple Regression Analysis Tenchi Suematsu, Remi Delage, Kazuyoshi Nemoto, Toshihiko Nakata The 37th Conference on Energy Systems, Economics, and the Environment　2021/01/27 Cluster analysis of Japan households’ energy consumption per resource Remi Delage, Toshihiko Nakata The 37th Conference on Energy Systems, Economics, and the Environment　2021/01/27 Design of District Heating System Considering Power-to-Heat Shunya Ozaki, Toshihiko Nakata, Remi Delage, Kazuyoshi Nemoto The 37th Conference on Energy Systems, Economics, and the Environment　2021/01/26 Model analysis of wide-area utilization of woody biomass resources considering the working system of wood production Haruto Chida, Kazuyoshi Nemoto, Toshihiko Nakata 16th Biomass Science Conference　2021/01/20 Smart city from energy and environment perspectives Invited Toshihiko Nakata 2021/01/14 Energy system integration design having miximum renewable resources by cross border analysis Invited Toshihiko Nakata Renewable Energy 2020　2020/12/07 Design for a sustainable city from energy perspectives Invited Toshihiko Nakata 2020/11/26 4th Generation District Heat Supply and Smart Energy Invited Toshihiko Nakata 4DH Forum 2nd Online Seminar　2020/09/28 Energy System Design for a Decarbonized Society Invited Toshihiko Nakata 4DH Forum 1st Online Seminar　2020/07/10 Comparison of Carbon Emissions Utilizing Different Residential Heating Systems in Mountainous Areas International-presentation Kazuyoshi Nemoto, Toshihiko Nakata, Shogo Nakamura, Yasufumi Mori, Makoto Ooba e-EUBCE 2020 - 28th European Biomass Conference and Exhibition　2020/07/06 Analysis of the Productivity of Woody Biomass Supply Chain for Gentle and Steep Slopes International-presentation Haruto Chida, Kazuyoshi Nemoto, Toshihiko Nakata, Shogo Nakamura, Makoto.Ooba e-EUBCE 2020 - 28th European Biomass Conference and Exhibition　2020/07/08 Machine learning for modeling energy systems complexity International-presentation International-coauthorship Remi Delage, Toshihiko Nakata 33rd International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems　2020/06/29 More details Close In the context of rising concerns on climate change, e orts are made to improve our energy systems with the target of a carbon-neutral society by 2050. Energy systems are complex systems yet most modeling approaches do not consider their core aspects described by complexity science so far. These aspects can be grouped into Adaptation, Nonlinearity, Self-organization, and Network, which are interrelated and without which one cannot explain energy systems complex dynamics. The present study suggests the use of machine learning models to capture energy systems complexity. Some studies have already implemented machine learning for cluster analysis or forecasting purposes, but the potential of such techniques is still far from being fully exploited. We remind some understanding of complex systems then explain how machine learning models can complement or surpass current models as well as their limitations. Concrete examples are given for real applications. Design of distributed woody biomass energy system in a mountainous area of Japan, world sustainable energy days, 2020 Kazuyoshi Nemoto,, Toshihiko Nakata., Shogo Nakamura,, Yasuhumi Mori., Makoto Oba, World Sustainabnle Energy Days, European Pellet Conference 2020　2020/03/04 Visualization of energy flows in rural areas Invited Toshihiko Nakata 2020/02/04 Integrated design of cross-border energy systems that considering region specific resources and demand Hiroaki Onodera, Toshihiko Nakata The 36th Conference on Energy Systems, Economics, and the Environment　2020/01/29 More details Close The purpose of this research is clarify the role of each municipality for the sustainable and decarbonized society and provide the evidence for policy makers who tackles making effective energy policy that focused on the region. As a background, Japanese municipalities has been required to make regional energy plan but over the 70% municipalities has not done the drawing up. We refer the governmental survey and presume the course of this problem is the individual region doesn’t have enough renewable energy resources or energy demand of financial capability. As a solution for the problem, we propose generating cross-border area that some regions shares these resources and demand each other and improve their energy self- sufficiency. For solving the problem, we developed spatial clustering method that applied cluster analysis algorithm to the graph partitioning. As a result of some case study, cross-border area shows higher performance nearly prefecture than individual cities in energy self-sufficiency perspective. Designed Asahikawa cross-border has energy circular structure that Asahikawa city as a central large demand region obtains energy resources from neighbors including Horokanai town. Energy self- sufficiency of the area is 143%. Optimal Design and Evaluation of Decarbonized Energy Systems Considering Sector Coupling Naoya Nagao, Toshihiko Nakata The 36th Conference on Energy Systems, Economics, and the Environment　2020/01/29 More details Close This research aims to analyze the introduction impact of sector coupling toward decarbonized energy system in Tohoku area, Japan. First, we have developed optimization model to design sector-coupled energy system. Then, several scenarios regarding energy consumption in demand have been input and their performances have been evaluated. As a result, TPES decrease in all scenarios, but the annual system costs increase from 80% to 140% compared to the current level. Half of this costs are accounted for by power generation, which exceeds the current system cost. Since vehicle-to-grid and power-to-heat contribute to improving capacity factor of the electrolyzer in addition to the balancing electrical grid, the introduction of vehicle-to-grid and district heating lead to the reduction of annual system costs. Furthermore, reinforcement of transmission lines reduces annual system costs, but the effect is weaker as more sectors are coupled. In sector-coupled energy systems, it is difficult to optimize without cooperation of various players, so the design of market mechanisms is important for social implementation. Design of District Heating System Using Excess Electricity Considering Sector Coupling Shunya Ozaki, Toshihiko Nakata The 36th Conference on Energy Systems, Economics, and the Environment　2020/01/29 More details Close While district heating systems (DHS) are widely introduced in Europe, heating systems in Japan are still mostly individual. DHS allow to utilize excess heat. The purpose of this study is to design and evaluate potential DHS using excess heat and power generated by renewable energy in Izumi Park Town. First, heat demand in residential and commercial sectors is estimated from public data, and a heat demand map is created using GIS. Next, a heat pipeline is designed based on the map, and the system is evaluated in terms of energy and environment, considering the case of utilizing excess heat or the use of power generated by renewable energy. As a result, it was found that the designed DHS using excess heat achieves an energy efficiency of 93%, and allow to reduce CO2 emissions by 75% from the current level. Moreover, by using power generated by renewable energy, the energy efficiency was improved to 92.7% and CO2 emissions from heat supply were reduced to zero. It was also found that it satisfies European design standards for heat density and linear heat density. From this result, it was found that DHS can greatly contribute to decarbonization by using exhaust heat and surplus power. Autoencoder for the Analysis of Energy Systems Data Remi Delage, Toshihiko Nakata The 36th Conference on Energy Systems, Economics, and the Environment　2020/01/28 More details Close In the context of raising concerns on climate change and global warming, efforts are made to improve our energy systems by reducing carbon emissions and energy consumptions while integrating new cleaner technologies. For efficient action taking toward a carbon-less society, we first need a proper understanding of these systems, which is a difficult task because of their high complexity and many actors. The present study focuses on evaluating the potential of machine learning models, specifically autoencoders, for providing a simplified, denoised representation of energy systems data by extracting their most important features. Design and Analysis of Residential Heat Supply System using Forest Resources in Mountainous Areas Kazuyoshi NEMOTO, Toshihiko NAKATA Proceedings of the Conference on 15th Biomass Science　2019/12/12 More details Close In considering climate change mitigation measures, it is important to consider woody biomass such as forest resources sustainably. This study aims to evaluate woody biomass for heating consumption of households considering the amounts of available woody biomass in the Okuaizu region of Fukushima Prefecture. GHG emissions of households heating systems such as kerosene stove, air conditioner with high or low energy efficiency, heating systems that use woody biomass resource are evaluated and compared. Technological and Economic Assessment of Woody Biomass Production Cost NAKATA Toshihiko roceedings of the Conference on 15th Biomass Science　2019/12/12 More details Close Energy conversion technology of woody biomass (WB) has attracted attention because of carbon neutral energy. On the other hand, the energy use of WB is not advanced sufficiently since WB power generation costs are higher than grid power generation costs. One of the reasons for high cost of WB power generation are that the WB fuel costs account for more than 50% of the total power generation costs, which is essential to reduce WB production costs in order to expand the use of WB. Costs, life cycle assessment, and technological performance and improvement of WB use have been discussed previously. However, those studies tend to be limited to present technologies and specific areas. Moreover, they have not discussed the impacts of technological improvements and/or introduced technologies to the WB power generation costs. In this study, we focus on the WB production cost, and clarify the correlation of each factor between processes and the impact of each element improvement on power generation costs. We design a WB production process, calculate its cost by a detailed bottom-up approach, and propose technological scenarios to show innovation pathways to utilize WB effectively. We find that it is important to improve the chipping cost and the labor efficiency of timbering, and thus it is suggested that the WB power generation cost can achieve 25 JPY/kWh which is a target cost in this study. Development of wood harvesting system model considering a spatial information of forest resources Haruto CHIDA, Kazuyoshi NEMOTO, Toshihiko NAKATA Proceedings of the Conference on 15th Biomass Science　2019/12/12 More details Close The purpose of this study is to develop wood harvesting system model considering spatial information of forest resources. The forest data include forest area, tree volume, slope, hauling distance, etc. We set six cases considering full-tree, tree-length and cut-to-length logging with either gentle slope or steep slope. The performance of the systems are evaluated by thier productivity, energy consumption, CO2 emission. As a result of a case study in Mishima town, Fukushima for six cases, the averaged system productivity is 3.1-8.8m3/hour. The averaged energy consumption and CO2 emission are 80.6-268.1MJ/m3 and 5.6-18.5kg-CO2/m3, respectively. This study can provide some beneficial information for decision making in forestry. Machine learning for the analysis of energy systems Rémi DELAGE, Toshihiko NAKATA JSME Technology and Socoiety Division　2019/11/30 Design of regional heat supply system based on spatial information analysis of energy supply and demand Shunya OZAKI, Toshihiko NAKATA JSME Techhnology and Society Division　2019/11/30 Selection requirements for woody biomass utilization technology in local area of Japan Kazuyoshi NEMOTO, Shogo NAKAMURA, Yasuhumi MORI, Makoto OOBA, Toshihiko NAKATA JSME Technology and Society Division　2019/11/30 Introducing sector coupling to utilize renewable resources for regional decarbonization in Japan International-presentation Naoya Nagano, Toshihiko Nakata 5th International Conference on Smart Energy Systems　2019/09/11 Potential of Smart Cities in the Affected Areas from an Environmental and Energy Perspective Invited Toshihiko Nakata 29th Forum　2019/09/02 A cluster analysis of the regions that considering energy supply and demand Hiroaki Onodera, Toshihiko Nakata The 38th Annual Meeting of Japan Society of Energy and Resources　2019/08/05 Design of Regional Energy System Considering Sector Coupling in Tohoku Area Naoya Nagano, Toshihiko Nakata The 38th Annual Meeting of Japan Society of Energy and Resources　2019/08/05 Analysis and integrated design for supply chain of Empty Fruti Bunch (EFB) pellet International-presentation Yuka Yokoi, Takaaki Furubayashi, Toshihiko Nakata, Hidekazu Kasai EUBCE2019　2019/05/30 More details Close This study aims to design and analyze green supply chain of the Empty Fruit Bunch (EFB) as biomass fuel in South-East Asia, Malaysia, based on logistics modeling delivered from Malaysia to Japan. Design for green supply chain consists of two approaches. The first one is to model an efficient logistics network, and this approach includes solving both facility location problem and vehicle routing problem. The second approach is an analysis and assessment of sustainability into the whole supply chain of EFB considering energy consumption, CO2 emission and costs, etc. Area of case study is focused on Malay Peninsula. Integrated design and analysis for sustainable energy system Invited NAKATA Toshihiko The Heat Transfer Society of Japan　2019/05/11 Optimum operation and priductivity assessment of harvesting mechanization for sustaionable forest utilization SATO Takashi, FURUBAYASHI Takaaki, NAKATA Toshihiko 130th Annual JFS Meeting　2019/03/22 Integrated design of sustainable energy system for decarbonized society in 2050 based on a partial equilibrium energy - economic model Ryo Takahashi, Takaaki Furubayashi, Toshihiko Nakata Proceedings of the 35th Conference on Energy, Economy, and Environment　2019/01/29 Design of decarbonized local energy systems considering sector coupling Naoya Nagano, Takaaki Furubayashi, Toshihiko Nakata The 35th Conference on Energy Systems, Economics, and the Environment　2019/01/29 Structural analysis of energy consumption of regional passenger transportation systems for a sustainable society based on analysis of transportation choices Natsuo Murakata, Takaaki Furubayashi, Toshihiko Nakata Design of decarbonized local energy systems considering sector coupling　2019/01/29 Optimal design of energy systems for a decarbonized society based on analysis of local resource and energy supply and demand Tomoaki Kakuta, Takaaki Furubayashi, Toshihiko Nakata Structural analysis of energy consumption of regional passenger transportation systems for a sustainable society based on analysis of transportation choices.　2019/01/29 Performance Analysis of District Heat Supply System Considering Expansion of Heat Pipeline Network Takaaki Furubayashi, Toshihiko Nakata Optimal design of energy systems for a decarbonized society based on analysis of local resource and energy supply and demand　2019/01/29 Integrated design and analysis for supply chain of Empty Fruit Bunch pellet Yuka YOKOI, Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the Conference on 14th Biomass Science　2019/01/16 More details Close The purpose of this study is to design a sustainable supply chain for EFB (Empty Fruit Bunch) pellet. Biomass supply chain consists of resource, conversion, demand and logistics. Though logistics is important, this field is mainly studied in operations research (OR). To make a sustainable biomass supply chain realize, logistics modeling method is applied. There are two main stages in this study. The first is logistics modeling and the second is evaluation of sustainability. In the first stage, facility location problem (FLP) and vehicle routing problem (VRP) are solved, and also storage capacity is managed. In the second stage, sustainability of designed model is evaluated. As a case study in Malaysia, logistics was optimised and eveluated sustainability. The number of vehicles and total transport distance respectively became 6 vehicles/day and 115 km/day less by additionally considering VRP to FLP. The reduction of energy consumption, CO2 emission and cost became 3 GJ/day, 0.2 t-CO2/day and 20 USD/day. Design of a sustainable forestry policy model for the Oku Aizu in Fukushima Prefecture Takashi SATO, Takaaki HURUBAYASHI, Toshihiko NAKATA Proceedings of the Conference on 14th Biomass Science　2019/01/16 More details Close In this study, we aim to design sustainable forestry policy models focusing on forest resource data and forestry machine operation. For analysis, we use spatial information analysis and design optimal forestry machine placement. Analysis was carried out for the west area of Mishima Town, as a Case Study, in the Oku Aizu area in Fukushima Prefecture. As a result of evaluating the labor productivity of the forest with a slope of 20°or more, the average labor productivity was 10.16 [m3/man-day]. It is considered to be able to contribute to forest roads and planning of forest maintenance. Analysis of regional biomass energy system considering heat, power and CHP Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the Conference on 14th Biomass Science　2019/01/16 More details Close This study aims to analyze the regional biomass energy system. Three systems that the woody biomass distributed in the target region is utilized to heat, power, or combined heat and power (CHP) are compared based on the fossil fuel substitution rate. The heat produced from the biomass resource by heat only boiler (HOB) or CHP is distributed in the district heating system (DHS). In this study, the district heating network is designed using Prim’s method based on the linear heat density [GJ/m]. As a case study, the target area is Koriyama city. 968 buildings are selected as district heating demand based on the drawn heat density map. The designed district heating network length is 21.2 km, and the linear heat density is 10.4 GJ/m. The fossil fuel substitution rates are 0.86 for HOB, 0.61 for power, and 1.03 for CHP. Integrated design of sustainable energy system for decarbonized society in 2050 TAKAHASHI Ryo, FURUBAYASHI Takaaki, NAKATA Toshihiko The Proceedings of the Tecnology and Society Conference, JSME　2018/12/01 More details Close This research aims to predict the transition of energy system leading to a decarbonized society in 2050 by analyzing the impact of changes in resource prices and demand on Japanese energy systems. Using partial equilibrium energy - economic model, energy process constituting the market economy of Japan was modeled and evaluated about primary energy supply amount, supply price, CO2 emission etc. As a result, energy use efficiency in Japan&＃39;s energy system in 2050 improved by about 22.5% from 30.9% in 2015 to 53.4%, and the cost required for fossil fuel was reduced by about 85.7%. Design and analysis of district heating system utilizing excess heat in Japan International-presentation Shin Fujii, Takaaki Furubayashi, Toshihiko Nakata 4th International Conference on Smart Energy Systems And 4th Generation District Heating　2018/11/18 Analysis for energy supply-demand structure and system performance of smart community N. Nagano, T. Furubayashi, T. Nakata The 55th Annual Meeting of the Japan Section of the RSAI　2018/10/08 Future perspectives of regional development International-presentation Invited Toshihiko Nakata International Workshop: Future perspectives of bioenergy development in Asia　2018/09/07 More details Close On September 5-7 2018, IEA Bioenergy organized a workshop in cooperation with NEDO / METI with support from the REI in Japan on potential technical and organizational improvements to biomass supply chains, including pre-treatment technologies, bio-refineries, logistics/trade, final conversion/end-use and overarching topics such as sustainability assurance frameworks and policy support options. During six sessions, this workshop on the one hand provided such technical information to Asian member countries, but also information on the activities of IEA Bioenergy to support the decision making process for membership. Spatial distribution analysis of local energy demand-supply and design of energy system in Fukushima Wakana SEINO, Takaaki FURUBAYASHI, Toshihiko NAKATA The Proceedings of Conference of Tohoku Branch, The Japan Society of Mechanical Engineers　2018/03/15 Design of district heat supply system considering conduit heat density Takaaki Furubayashi, Toshihiko Nakata 34th Conference on Energy, Economy, and Environment　2018/01/25 More details Close (プロシーディング) 第34回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2018. Characteristics of European District Heat Supply and Evaluation of its Potential for Introduction in Japan Shin Fujii, Takaaki Furubayashi, Toshihiko Nakata 34th Conference on Energy, Economy, and Environment　2018/01/25 More details Close (プロシーディング) 第34回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2018. Structural changes in the local energy system associated with the shared car transition Natsuo, Murakata, Takaaki Furubayashi, Toshihiko Nakata 34th Conference on Energy, Economy, and Environment　2018/01/25 More details Close (プロシーディング) 第34回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2018. Food and energy nexus based on global and Japanese flow analysis Saki Kawashima, Takaaki Furubayashi, Toshihiko Nakata 34th Conference on Energy, Economy, and Environment　2018/01/25 More details Close (プロシーディング) 第34回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2018. Design of a system to use renewable energy in a zone near the plant for sustainable automotive manufacturing Shuntaro Kitamura, Takaaki Furubayashi, Toshihiko Nakata 34th Conference on Energy, Economy, and Environment　2018/01/25 More details Close (プロシーディング) 第34回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2018. Overview of bioenergy in Japan’s energy system International-presentation T. Nakata Biomass workshop　2018/01/22 Energy Data Map and Regional Design Toshihiko Nakata Strategies for building an energy service database to realize a sustainable, ultra-smart society　2018/01/19 Sustainable biomass energy business solutions Toshihiko Nakata 13th Biomass Science Conference　2018/01/17 Design of the regional biomass energy system based on the effective utilization rate of resource Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the 13th Conference on Biomass Science　2018/01/17 More details Close This study aims to design the regional biomass energy system considering effective utilization rate of resource and fossil fuel reduction rate. First of all, energy density maps in Koriyama city are drawn, and the demand buildings are selected from higher heat density area. As heat demands, the fuel consumption of space heating and hot water are estimated. The district heating network is designed instead of traditional individual heating system, and the total heat pipe length is 1,787 m. Woody biomass are collected from Koriyama city, and average transportation distance is 23 km. As results, the chip boiler has the largest fossil fuel reduction rate 0.85, and the gasification CHP has the smallest CO2 reduction cost 38,000 JPY/t-CO2. Integrated Design of Woody Biomass Harvesting System Based on a Spatial Information Analysis Kosuke OKANO, Takaaki FURUBAYASHI, Toshihiko NAKATA, Makoto Ooba Proceedings of the 13th Conference on Biomass Science　2018/01/17 More details Close The purpose of the study is to design woody biomass harvesting system with high productivity to utilize efficiently forest resources. The system is designed based on a spatial analysis of forest volume, forest slope, forest age, and forwarding distance. The performance of the designed systems is evaluated by labor productivity, energy consumption, and CO2 emissions. The labor productivity of the systems is ranged in 4 - 44 m3/man-day (average, 19 m3/man-day), the averaged energy consumption and CO2 emission are 130MJ/m3 and 9 kg-CO2/m3, respectively. The results of this analysis can provide helpful information to the design of woody biomass supply chain. Assessing Food and Energy Nexus Based on their Material and Energy Flows Analysis Saki KAWASHIMA, Takaaki FURUBAYASHI, Toshihiko Nakata Proceedings of the 13th Conference on Biomass Science　2018/01/17 More details Close The purpose of this study is to show evidences for designing a sustainable supply-demand system of both food and energy. Analytical method includes designing an integrated flow diagram of food and energy. This shows series of flows from food production to consumption and the energy consumed in the process of food chain. In this study, biofuel production is 1.4×10-2 EJ, which accounts for 0.08% of Japan&＃39;s total primary energy supply (TPES) 18.5 EJ. TPES in the food chain is 1.84 EJ, which reaches 10% of Japan’s TPES. It’s important to understand the mutual relationship of all related resources, in order to deal with multiple problems at the same time like increasing biofuel production and stabilizing food and energy prices. Integrated design of wastewater heat energy utilization system for decarbonization at urban and regional level Tomoaki KAKUTA, Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the Conference on 13th Biomass Science　2018/01/17 More details Close In this study, we have designed a wastewater heat energy utilization system by spatial analysis of both wastewater heat utilization potential and heat demand using GIS. The system consists of a heat exchanger, a heat pump, and a heat consumer. The potential is estimated by multiplying wastewater flow rate to specific heat and temperature difference. Heat demand is estimated by multiplying unit of heat demand to total floor area or number of households. As a result of case study in Hirosaki city, Aomori prefecture, wastewater heat utilization potential of 0.17 PJ/year corresponds to 0.7 % of primary energy supply in the city. In addition, it is found that introducing medical facilities into the system as a heat resources, the primary energy supply and the CO2 emission can be reduced by 38 % and 50 %, respectively. Integrated design and analysis for global supply chain of Empty Fruit Bunch Yuka YOKOI, Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the 13th Conference on Biomass Science　2018/01/17 More details Close The purpose of this study is to analysis and design for a global supply chain of EFB (Empty Fruit Bunch) consists of palm oil mills, pelletizers and ports. The process is to collect EFB around mills, transport to pelletizers, pelletize, transport to ports and export. Energy consumption, carbon emission and total cost are evaluated at each process and integrated for Inventory Analysis. Energy production by substituting biomass energy from fossil fuel is also analyzed. As a result of a case study in Malaysia and Japan for three cases, total energy surplus becomes 6.43 – 6.84 GJ per unit ton of EFB, CO2 emission becomes 0.203 – 0.208 t-CO2, and total cost reaches 6.65×104 - 6.71×104 USD, respectively. Spatial and temporal analysis of renewable resources for sustainable energy systems in rural India using GIS Ankit Yadav,, Takaaki Furubayashi, Toshihiko Nakata 5th Asian Conference on Biomass Science　2018/01/16 Integrated design of sustainable energy systems Toshihiko Nakata, Takaaki Furubayashi Joint Workshop on Electrical Systems/Smart Facilities　2017/11/10 Integration of local actions into national development towards achieving SDGs in Asia and the role of science and technology: Development and application of models and monitoring technologies to evaluate transition to the SDGs International-presentation 6th Annual Meeting of the LoCARNet　2017/11/01 Integrated design of sustainable energy systems Toshihiko Nakata The Japan Society of Mechanical Engineers Tohoku Branch Special Lecture Meeting　2017/10/21 More details Close 持続可能なエネルギーシステム利用に関する第2回特別講演会 Optimization of the Vehicle Life Cycle Considering the End of Life Phase Fernando Enzo Kenta Sato, Takaaki Furubayashi, Toshihiko Nakata Society of Automotive Engineers of Japan, 2017 Fall Meeting Academic Conference　2017/10/11 Assessing Food and Energy Nexus Based on their Material and Energy Flows Analysis Saki KAWASHIMA, Takaaki FURUBAYASHI, Toshihiko NAKATA The 54th Annual Meeting of the Japan Section of the RSAI　2017/10/06 Integrated Design for Sustainable Energy Systems International-presentation International Conference on Materials and Systems for Sustainability 2017 (ICMaSS2017　2017/09/29 Design of district heating system based on linear heat density in Japan International-presentation Takaaki Furubayashi, Toshihiko Nakata International Conference on Materials and Systems for Sustainability 2017 (ICMaSS2017　2017/09/29 Assessing the real impact of the ELV to the entire vehicle life cycle, a material reusing and recycling approach International-presentation Fernando Enzo Kenta Sato, Takaaki Furubayashi, Toshihiko Nakata International Conference on Materials and Systems for Sustainability 2017 (ICMaSS2017　2017/09/29 Optimal Design of Woody Biomass Harvesting System Based on a Spatial Information Analysis of Forest Resources International-presentation Kosuke Okano, Takaaki Furubayashi, Toshihiko Nakata International Conference on Materials and Systems for Sustainability 2017 (ICMaSS2017　2017/09/29 Analyzing Food and Energy Nexus Based on Supply Resources, Material Flows, and Prices International-presentation Saki Kawashima, Takaaki Furubayashi, Toshihiko Nakata International Conference on Materials and Systems for Sustainability 2017 (ICMaSS2017　2017/09/29 Integrated Design for Sustainable Energy Systems Toshihiko Nakata roceedings of the 26th Annual Conference of The Japan Institute of Energy　2017/08/01 More details Close UN Sustainable Development Goals set 17 goals to transform our world which include ‘affordable clean energy’ in No.7 and ‘sustainable cities and communities’ in No. 11 to be achieved in 15 years. Paris agreement set by UN-FCCC implies zero carbon emissions toward the year 2050. Conventional energy system requires drastic and consistent changes based on an ideal design which satisfies multiple demands in future. The point of design inspires stakeholders to integrate physical, economic, and social dimensions to lead optimized energy configuration with less carbon emissions as well as reasonable costs. A practical approach of integrated design for sustainable energy systems is proposed to aid long term transition toward the Goals based on geographical/dynamic analysis. Estimating the Real Value of the End of Life Vehicle through an Material-Energy-CO2 Nexus Approach Fernando Enzo Kenta Sato, Takaaki Furubayashi, Toshihiko Nakata Academic Lecture at the Automobile Technology Society&＃39;s 2017 Spring Conference　2017/05/24 Design of energy system in vehicle assembly plants for decarbonizing society Shuntaro KITAMURA, Takaaki FURUBAYASHI, Toshihiko NAKATA The Proceedings of 52th Conference of Tohoku Branch　2017/03/14 More details Close 講演番号 209 予稿集 p. 215-216 家庭部門におけるエネルギーフローの作成とエネルギー消費特性の評価 川島彩貴, 古林敬顕, 中田俊彦 第33回エネルギーシステム・環境・経済コンファレンス　2017/02/02 More details Close (プロシーディング) 第33回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2017. 資源とエネルギーのネクサスを考慮した自動車リサイクルの性能評価 佐藤フェルナンド賢太, 古林敬顕, 中田俊彦 第33回エネルギーシステム・環境・経済コンファレンス　2017/02/02 More details Close (プロシーディング) 第33回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2017. エネルギー需要の空間分布に基づく地域エネルギーシステムの設計 古林敬顕, 中田俊彦 第33回エネルギーシステム・環境・経済コンファレンス　2017/02/02 More details Close (プロシーディング) 第33回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2017. 資源と需要の空間情報分布に基づく地域エネルギーシステムの準最適設計 井上憲輝, 古林敬顕, 中田俊彦 第33回エネルギーシステム・環境・経済コンファレンス　2017/02/02 More details Close (プロシーディング) 第33回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2017. Improvement of the Bioethanol Process Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the 12th Conference on Biomass Science　2017/01/18 More details Close This study aims to design the wood energy system based on the local energy demand distribution. For zero CO₂ emission, not only wood biomass but also other renewable energy such as solar and wind are considered. The monthly and daily energy demands of residential and commercial sectors are evaluated using an annual demand. The renewable energy potential is also evaluated using the local characteristics. As results in Fukushima prefecture, the electricity demand 33.3 PJ and the heat demand 38.5 PJ are obtained. Further, the wood biomass potential 33.8 PJ is also obtained. The wood biomass is utilized to the heat supply because the electricity demand is mainly covered by the solar and wind energy. Evaluation of mechanized wood harvesting system using spatial information Kosuke OKANO, Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the 12th Conference on Biomass Science　2017/01/18 More details Close The purpose of this study is to evaluate a mechanized wood harvesting system. The system consists of felling, skidding, processing and forwarding. In gentle slope areas, the system is designed by using vehicle-based forestry machines (Feller buncher, Skidder, Processor and Forwarder). We define the scale of land as 250-m mesh (6.25 ha) and locate forestry road networks and timber yards. As a result of using two feller bunchers, two skidders, two processors and two forwarders, it became clear that the productivity is about 28 m³/man-day. Based on this result, energy consumption, CO₂ emissions and total cost will be clarified. Optimal design of woody biomass supply chains using a spatial analysis of woody materials Hiroki SATAKE, Takaaki FURUBAYASHI, Toshihiko NAKATA Proceedings of the 12th Conference on Biomass Science　2017/01/18 More details Close In this study, we design a sustainable logistics system of forest biomass considering forest biomass supply chain linking from forests to power plants. The system consists of four depots, forests, natural drying sites, pellet plant and power plants, linked by truck transport. We calculate transportation amounts and storage on a day-to-day basis for a year with the linear programming using spatial information of amounts of available forest biomass, demands of power plants, and locations of depots. From this analysis, we reveal robust transportation network, supply cost, inventory turnover rate, lead time, energy consumption and CO₂ emission of the system. Using five indexes, energy consumption, CO₂ emission, cost, inventory turnover rate, and transport efficiency, we evaluate the performance of the system. Designing sustaianble energy cities Invited Toshihiko Nakata The 49th JAIF Annual Conference　2016/04/13 More details Close Sustainable energy communities aim at the rational use of energy with renewable energy sources. Valur of energy for human life changed drastically after the Great East Earthquake in 2011. Energy sata based on spatial information as well as time horizon for designing a high-value added community forms a key role in the 21 st century. The topic includes data driven innovation in energy industries and thier possible impacts on various region of Japan. Analysis of the Economic Impacts Caused by the Introduction of First-generation Liquid Bioethanol in Japan Using an Inter-regional CGE Model Héctor Villatoro, 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. 空間情報を考慮したカーボンフリー水素のポテンシャル推計および経済性評価 勝又遼太, 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. 石炭混焼発電を考慮した木質バイオマス供給システムの設計 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. エネルギーレジリエンスの定量的な評価手法の構築 蔡亮成, 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. 地域内経済および資源循環を考慮したエネルギーシステムの試設計 菊池美南, 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. エネルギー需給分布図の作成と地域エネルギー需給構成の比較研究 瀧田祐樹, 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. 資源と需要の空間情報分布に基づく地域エネルギーシステムの設計 井上憲輝, 古林敬顕, 中田俊彦 第32回エネルギーシステム・環境・経済コンファレンス　2016/02/02 More details Close (プロシーディング) 第32回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2016. 木質バイオマスの貯蔵工程を追加した木質燃料供給システムの設計 佐竹宏貴, 古林敬顕, 中田俊彦 第11回バイオマス科学会議　2016/01/20 More details Close (プロシーディング) 第11回バイオマス科学会議講演論文集 日本エネルギー学会 2016. 木材フローを考慮した木質バイオマスのポテンシャル評価 古林敬顕, 中田俊彦 第11回バイオマス科学会議　2016/01/20 More details Close (プロシーディング) 第11回バイオマス科学会議講演論文集 日本エネルギー学会 2016. Energy Strategy: Role of Gas Turbines in the Future Energy Network International-presentation Toshihiko Nakata International Gas Turbine Congress 2015 Tokyo　2015/11/15 スマートコミュニティを支えるIoT Toshihiko Nakata スマートコミュニティワールド　2015/11/12 PRELIMINARY DESIGN OF OPTIMAL ENERGY SYSTEM IN LOCAL AREA CONSIDERING ECONOMIC AND RESOURCE CIRCULATION Minami Kikuchi, Takaaki Furubayashi, Toshihiko Nakata JSCE 43th conference on environent and systems　2015/10/17 Economic ripple effect to local industries caused by introducing offshore wind power Minami KIKUCHI, Toshihiko NAKATA, Takaaki FURUBAYASHI The Proceedings of the 20th National Symposium on Power and Energy Systems　2015/06/18 More details Close This paper shows the economic impact of introducing offshore wind power by I-O analysis. It is important to build consensus between wind power operator and fishery industries because fishery has an important role for local industries. Therefore, this paper shows the economic impact caused from withdrawal of fishery and installation offish-farming. The target area of this research is focused on Japan, Ibaraki prefecture and Iwate prefecture. The final demand occurring from the whole project is assumed and the regional final demand is calculated. The economic ripple effect to other industries is evaluated using I-O table. The results shows that the construction and operation of offshore wind farm produces a lot of economic effect, and the withdrawal of fishery cause the economic loss in local area. In order to introduce more renewable energy, cooperative systems with other industries must be designed. Comparison Analysis Between Rice and Cassava for Bioethanol Production in Japan Considering Land Use Efficiency International-presentation M. Cuberos Balda, T. Furubayashi, T. Nakata The Asian Conference on Sustainability, Energy and the Environment 2015　2015/06/12 More details Close http://issuu.com/iafor/docs/acss-acsee-2015 A Multi-objective Analysis for a Quantitative Evaluation of National Energy Security International-presentation R. Sai, T. Furubayashi, T. Nakata 38th IAEE International Conference　2015/05/25 エネルギーシステムから見た自動車プラスチックリサイクルの役割 Toshihiko Nakata 自動車技術会2015春季大会フォーラム　2015/05/20 More details Close 自動車プラスチックリサイクルの役割 一般均衡理論を応用した地域の土地計画のためのバイオ燃料製造と食料生産のトレードオフの分析 Héctor Villatoro, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 化石燃料代替を目的とした木質バイオマス利活用システムの評価 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 混合整数計画法に基づく輸送手段および前処理施設配置の最適化と木質バイオマス利活用システムへの応用 佐藤雄治, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 多目的解析手法を応用したエネルギーセキュリティの定量評価 蔡亮成, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 燃料製造と需要家の価格感応性を考慮した旅客部門における燃料電池自動車の導入可能性評価 内田皓久, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 再生可能エネルギーのポテンシャルを考慮したエネルギーフローの作成 瀧田祐樹, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 土地利用を考慮した持続可能な農場デザインに関する研究 Marisabel Cuberos Balda, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 寒冷地における第４世代地域熱供給システムの設計 Ivar Baldvinsson, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 熱需給の空間分布を考慮した地域エネルギーシステムの最適設計 住友雄太, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 水素の製造から消費までを考慮したマテリアルフローの作成 勝又遼太, 古林敬顕, 中田俊彦 第31回エネルギーシステム・環境・経済コンファレンス　2015/01/27 More details Close (プロシーディング) 第31回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2015. 多様な資源及び技術を考慮したバイオマス利活用システムのエネ ルギー評価指標の構築 古林敬顕, 中田俊彦 第10回バイオマス科学会議　2015/01/14 More details Close (プロシーディング) 第10回バイオマス科学会議講演論文集 日本エネルギー学会 2015. 成長特性を考慮した藻類バイオ燃料の導入可能性評価 矢田健人, 古林敬顕, 中田俊彦 第10回バイオマス科学会議　2015/01/14 More details Close (プロシーディング) 第10回バイオマス科学会議講演論文集 日本エネルギー学会 2015. 林分収穫モデルに基づく木質バイオマス利用の持続可能性評価 門間千宙, 古林敬顕, 中田俊彦 第10回バイオマス科学会議　2015/01/14 More details Close (プロシーディング) 第10回バイオマス科学会議講演論文集 日本エネルギー学会 2015. 熱需要とバイオマス資源の空間分布を考慮したバイオガス熱電併 給システムの最適設計 住友雄太, 古林敬顕, 中田俊彦 第10回バイオマス科学会議　2015/01/14 More details Close (プロシーディング) 第10回バイオマス科学会議講演論文集 日本エネルギー学会 2015. 混合整数計画法を用いた持続可能な木質バイオマスのサプライ チェーンの設計 佐藤雄治, 古林敬顕, 中田俊彦 第10回バイオマス科学会議　2015/01/14 More details Close (プロシーディング) 第10回バイオマス科学会議講演論文集 日本エネルギー学会 2015. エネルギーを社会システムとして捉えるアプローチ手法 Toshihiko Nakata 日本機械学会年次大会　2014/09/07 内生的技術進歩と外生的コスト変動を考慮した燃料電池自動車の導入可能性評価 Matohisa Uchida, Furubayashi Takaaki, Mitsuru Matsumoto, Toshihiko Nakata 日本機械学会第19回動力・エネルギー技術シンポジウム　2014/06/26 自律・分散型エネルギー社会の地域デザイン Toshihiko Nakata 電気学会全国大会　2014/03/18 地域特性を考慮した再生可能エネルギー利活用システム Toshihiko Nakata 地球環境技術推進懇談会 循環・代謝型社会システム研究会　2014/02/24 More details Close 大阪科学技術センター Low energy heating system design for a community Ivar Baldvinsson, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. Integrating WTE technologies to an electerical system as a mechanism for achieving low-carbon growth in developing countries Marisabel Cuberos Balda, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. 熱需要の空間情報を考慮した弘前地域の地域熱供給システムの設計 恩田英, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. 再生可能エネルギーを活用するホンジュラス家庭部門電化と技術選択 Hector Villatoro, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. 燃料電池自動車の導入による化石燃料輸入額の抑制効果 松本満, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. CO2フリー水素と燃料電池自動車を考慮した道路輸送部門の低炭素シナリオのデザイン 古林敬顕, 中田俊彦, 松本満 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. Thermodynaics and economic analysis of solar energy utilization for water desalination & electricity generation, in middle east region Issa Zaiter, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. Learning-by-doingを考慮したハイブリッド動学的一般均衡モデルの開発とその応用 臼井岳文, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. 熱需要の空間分布を考慮した地域熱供給システムの熱力学的指標に基づく性能評価 會川翔, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. バイオマス資源とエネルギー需要分布を考慮した中山間地域熱供給システムの設計 住友雄太, 古林敬顕, 中田俊彦 第30回エネルギーシステム・環境・経済コンファレンス　2014/01/23 More details Close (プロシーディング) 第30回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2014. Design of sustainable woody biomass energy system using Geographical Information Keita Morigami, Takaaki Furubayashi, Toshihiko Nakata 9th Conference on Biomass Science　2014/01/15 More details Close The purpose of the research is to design a woody biomass energy system for rural area, and to evaluate the system considering the three dimensions of energy, economic, and environmental impact. The study targets sustainable forest resources and energy demand of residential sector. The system contains of harvest of biomass, harvested wood transportation, preprocess of woody biomass, woody biomass fuels transportation, and energy demand. The results show that energy potential is 670 TJ/yr and energy demand is 250 TJ/yr at Mogami town. So it is necessary to adjust supply to demand by designing a system. 家庭部門の熱及び電力需要を考慮したバイオマス利活用システムの設計 Takaaki Furubayashi, Toshihiko Nakata 9th conference on Biomass Science　2014/01/15 More details Close This study aims to design a biomass utilization system considering residential energy demand. Biomass utilization system consists of 5 processes such as Resource, Preprocessing, Energy conversion, Energy consumption, and Waste treatment. In each process without Energy consumption, energy balance, CO2 emission, and cost are evaluated. On the other hand, Energy consumption process plays a role of constraint. Especially, not only energy quantity but also energy quality is important for heat demand. In this study, biomass utilization system is modeled quantitatively and qualitatively. 東北被災地域の復興と再生可能エネルギー Toshihiko Nakata JEC検討委員会第16回全体会合　2013/11/29 持続可能なエネルギー社会(自律・分散型エネルギー社会)の 地域デザイン Toshihiko Nakata 電気学会第30回「センサ・マイクロマシンと応用システム」シンポ ジウム　2013/11/05 英国におけるPublic EngagementとResearch Impactの目指すもの International-presentation Toshihiko Nakata, l 日英対話シリーズ「日英における大学改革とイノベーション」　2013/10/09 自律・分散型エネルギー社会の地域デザイン Toshihiko Nakata 東北地方将来エネルギーフォーラム　2013/10/06 持続可能なエネルギー社会（自律・分散型社会）をつくる Toshihiko Nakata 土木学会第21回地球環境シンポジウム　2013/09/17 エネルギーシステムデザインの考え方とアプローチ手法 Toshihiko Nakata 日本機械学会年次大会　2013/09/08 木質バイオマスのエネルギー利用は化石燃料の代替にどこまで貢献できるか Toshihiko Nakata 日本木材学会　2013/03/28 技術習熟を考慮した水素製造コストの変遷 古林敬顕, 中田俊彦, 松本満 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. エネルギー指標に基づく地域エネルギーシステムの性能評価 會川翔, 古林敬顕, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. 地域熱供給システムと個別暖房・給湯方式の性能評価 井上清文, 古林敬顕, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. 習熟効果およびエネルギー効率の自律的改善に誘発される技術変遷の影響分析 臼井岳文, 古林敬顕, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. 資源の変遷と技術習熟を考慮した中長期エネルギーシステムの設計 瀧田祐樹, 古林敬顕, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. Modeling Advanced Vehicle Development in Developing Countries: Fuel Cell Hybrid Electric and Lightwieght Vehicles in Colombia Juan Carlos Gonzalez Palencia, 古林敬顕, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. Design of a Small Scale CSP bases Cogeneration Cycle Sayed Mohammad Sanaei, 古林敬顕, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. 再生可能エネルギー独立分散システムの熱電変換素子利用 伊藤成香, 矢野歳和, 新野正之, 中田俊彦 第29回エネルギーシステム・環境・経済コンファレンス　2013/01/29 More details Close (プロシーディング) 第29回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2013. 資源と技術の多様性を考慮したバイオマス利活用システムの 設計 Takaaki Furubayashi, Toshihiko Nakata 8th Conference on Biomass Science　2013/01/09 More details Close (プロシーディング) 第8回バイオマス科学会議講演論文集 日本エネルギー学会 2013. 経済・社会的側面を考慮した自動車用バイオフュエルのサ プライチェーンの最適設計 Kazuhiro Yoda, Takaaki Furubayashi, Toshihiko Nakata 8th Conference on Biomass Science　2013/01/09 More details Close (プロシーディング) 第8回バイオマス科学会議講演論文集 日本エネルギー学会 2013. 地理情報を用いた木質バイオマスのエネルギー利用システムの設計 Keita MOrigami, Takaaki Furubayashi, Toshihiko Nakata 8th Conference on Biomass Science　2013/01/09 More details Close (プロシーディング) 第8回バイオマス科学会議講演論文集 日本エネルギー学会 2013. ポスト震災の地域エネルギーシステムの近況 Toshihiko Nakata 日本機械学会年次大会　2012/09/10 地域スマートエネルギーシステムの設計 Toshihiko Nakata 電気学会 電子・情報・システム部門大会　2012/09/05 技術の多様性を考慮した木質バイオマス利活用システムの設計 Takaaki Furubayashi, Toshihiko Nakata 第22回環境工学総合シンポジウム2012　2012/07/04 東北地方の木質バイオマスポテンシャル評価 Takahiro Ono, Takaaki Furubayashi, Toshihiko Nakata 第22回環境工学総合シンポジウム2012　2012/07/04 石炭火力発電所混焼を想定した木質バイオマス供給システムの設計 Keita Morigami, Takaaki Furubayashi, Toshihiko Nakata 第22回環境工学総合シンポジウム2012　2012/07/04 資源の多様性と技術習熟を考慮した低炭素エネルギーシステムの設計 Yuki Takita, Takaaki DFurubayashi, Toshihiko Nakata 第22回環境工学総合シンポジウム2012　2012/07/04 東北地方の地域特性を考慮した地域熱供給システムの設計 Kiyofumi Inoue, Takaaki Furubayashi, Toshihiko Nakata 第22回環境工学総合シンポジウム2012　2012/07/04 持続可能な地域社会に向けた統合エネルギーシステムの設計 Sanaei Sayyed Mohammad, Takaaki Furubayashi, Toshihiko Nakata 第22回環境工学総合シンポジウム2012　2012/07/04 低炭素型エネルギーシステムのデザイン Toshihiko Nakata 電気学会全国大会　2012/03/21 研究開発による技術習熟を考慮した太陽光発電コストおよび普及量の予測 Shinnosuke Hayamizu, Takaaki Furubayashi, Toshihiko Nakata 第28回エネルギーシステム・環境・経済コンファレンス　2012/01/30 More details Close (プロシーディング) 第28回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2012. 排水処理に対するCDMを考慮したバイオガス利活用システムの導入影響評価 Takaaki Furubayashi, Toshihiko Nakata 第28回エネルギーシステム・環境・経済コンファレンス　2012/01/30 More details Close (プロシーディング) 第28回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2012. 次世代自動車及びバイオ燃料の導入影響分析 Kazuya Takahashi, Takaaki Furubayashi, Toshihiko Nakata 第28回エネルギーシステム・環境・経済コンファレンス　2012/01/30 More details Close (プロシーディング) 第28回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2012. 複数の資源と技術を考慮したバイオマス利活用システムの設計 Takaaki Furubayashi, Toshihiko Nakata 7th Conference on BIomass Science　2012/01/18 More details Close (プロシーディング) 第7回バイオマス科学会議講演論文集 日本エネルギー学会 2012. アジア地域における国際輸送を考慮したオイルパーム残渣利活用システムの設計および導入可能性評価 Kosuke Akao, Takaaki Furubayashi, Toshihiko Nakata 7th Biomass on BIomass Science　2012/01/18 More details Close (プロシーディング) 第7回バイオマス科学会議講演論文集 日本エネルギー学会 2012. 社会セキュリティと低炭素を両立するエネルギーシステムの地域デザイン Toshihiko Nakata 未来エネルギーシステムに関する対話シンポジウム　2011/12/10 リスク解析学入門 Toshihiko Nakata 第48回環境工学研究フォーラム　2011/11/26 CO2 reduction in power plants International-presentation Invited Toshihiko Nakata International Gas Turbine Congress 2011 Osaka　2011/11/16 低炭素社会をめざすエネルギーシステムデザイン Toshihiko Nakata 日本機械学会2011年度年次大会　2011/09/11 研究開発による技術習熟が再生可能エネルギーの普及に及ぼす影響 Toshihiko Nakat 国際エネルギー経済学会年次大会報告会　2011/07/29 低炭素社会に向けたエネルギーシステムのデザイン Invited Toshihiko Nakata 日本ガスタービン学会定期講演会　2011/07/06 Design for smart energy systems securing resilience in community Toshihiko Nakata 起業家とイノベーターのためのセミナー　2011/06/17 先進的エネルギーシステムのデザイン Invited Toshihiko Nakata 日本航空宇宙学会第42期年会講演会　2011/04/14 Design of an energy system based on renewable energy for rural electrification in developing countries H. Akyaa-Bonsu, Toshihiko Nakata 第27回エネルギーシステム・環境・経済コンファレンス　2011/01/25 More details Close (プロシーディング) 第27回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2011. 国際輸送を考慮したEFB利活用システムの設計 Takaaki Furubayashi, Kosuke Akao, Toshihiko Nakata 第27回エネルギーシステム・環境・経済コンファレンス　2011/01/25 More details Close (プロシーディング) 第27回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2011. エクセルギ−指標を考慮した家庭部門のエネルギーシステム設計 Taisuke Watanabe, Takaaki Furubayashi, Toshihiko Nakata 第27回エネルギーシステム・環境・経済コンファレンス　2011/01/25 More details Close (プロシーディング) 第27回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2011. 環境影響を考慮した航空輸送システムに関する研究 Shogo Watanabe, Furubayashi Takaaki, Toshihiko Nakata 第27回エネルギーシステム・環境・経済コンファレンス　2011/01/25 More details Close (プロシーディング) 第27回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2011. バイオガス回収利用システムの設計とCDMに基づく性能評価 Takaaki Furubayashi, Toshihiko Nakata 6th Confence on BIomass Science　2011/01/12 More details Close (プロシーディング) 第6回バイオマス科学会議講演論文集 日本エネルギー学会 2011. 先進的エネルギーシステムのデザイン Invited Toshihiko Nakata 東北電力関係会社技術開発報告会　2010/12/07 先進的エネルギーシステムのデザイン Toshihiko Nakata 日本機械学会特別講演会　2010/11/24 Design of a smart energy system for low carbon society International-presentation T. Furubayashi, Toshihiko Nakata International Symposium on Low Carbon & Renewable Energy Technology　2010/11/15 低炭素社会に向けたエネルギーシステムの設計 Toshihiko Nakata 電気学会研究会　2010/11/09 地域に根差した低炭素エネルギーのかたち：スマートエネルギーシステム構想 Toshihiko Nakata 第2回ナノテク・低炭素化材料技術シンポジウム　2010/09/02 需要部門のエネルギー機器効率向上に伴う南アフリカ共和国のCO2排出量削減効果 Juta Matsumoto, Toshihiko Nakata 第26回エネルギーシステム・環境・経済コンファレンス　2010/01/26 More details Close (プロシーディング) 第26回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2010. 一般廃棄物を利用した地域熱供給システム設計に関する研究 Rodionov Mikhail, Toshihiko Nakata 第26回エネルギーシステム・環境・経済コンファレンス　2010/01/26 More details Close (プロシーディング) 第26回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2010. 我が国製造業のエネルギー消費構造の分析 Fuyuhiko Noda, Toshihiko Nakata 第26回エネルギーシステム・環境・経済コンファレンス　2010/01/26 More details Close (プロシーディング) 第26回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2010. 先進諸国のエネルギーセキュリティの定量評価 Takahiro Suzuki, Toshihiko Nakata 第26回エネルギーシステム・環境・経済コンファレンス　2010/01/26 More details Close (プロシーディング) 第26回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2010. Multi-objective optimization of biomass-based energy system for rural electrification in developing countries Diego Silva, Toshihiko Nakata 第26回エネルギーシステム・環境・経済コンファレンス　2010/01/26 More details Close (プロシーディング) 第26回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2010. エネルギー経済モデルによるエネルギーシステムの最適設計 Invited Toshihiko Nakata 第38回ガスタービンセミナー　2010/01/21 More details Close セミナー講師及びパネルディスカッション座長 地域特性を考慮した微細藻類バイオマスエネルギーシステムの導入可能性評価 Koji Oshita, Toshihiko Nakata 5th Conference on Biomass Science　2010/01/20 More details Close (プロシーディング) 第5回バイオマス科学会議講演論文集 日本エネルギー学会 2010. インベントリ分析による下水汚泥エネルギー利用システムの性能評価と感度分析 Yosuke Kimuro, Toshihiko Nakata 5th Conference on BIomass Science　2010/01/20 More details Close (プロシーディング) 第5回バイオマス科学会議講演論文集 日本エネルギー学会 2010. 木質系バイオマスを利用した地域熱供給システムの設計 Takaaki Furubayashi, Toshihiko Nakata 5th Conference on BIomass Science　2010/01/20 More details Close (プロシーディング) 第5回バイオマス科学会議講演論文集 日本エネルギー学会 2010. 東南アジアおよび東アジア地域におけるバイオエタノールの国際貿易モデルの構築 Kei Takahashi, Toshihiko Nakata 5th Conference on Biomass Science　2010/01/20 More details Close (プロシーディング) 第5回バイオマス科学会議講演論文集 日本エネルギー学会 2010. A bottom up energy system model analysis of CHP technology diffusion considering technology transfer to developing countries Camilo Hyoma Araya, Toshihiko Nakata The 36th Conference on Energy, Economy, and Environment　2009/01/29 More details Close (プロシーディング) 第25回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2009. ロシアにおける最適な一般廃棄物処理システム設計に関する研究 Rodionov Mikhail, Toshihiko Nakata 25th Conference on Energy, Economy, and Environment　2009/01/29 More details Close (プロシーディング) 第25回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2009. 技術習熟を考慮したCO2回収貯留技術の導入可能性評価 Tomoya Kusunoki, Toshihiko Nakata 25th Conference on Energy, Economy, and Environment　2009/01/29 More details Close (プロシーディング) 第25回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2009. Construction of a model for rural energy systems towards a low carbon society in developing countries Diego Silva, Toshihiko Nakata 25th Conference on Energy, Economy, and Environment　2009/01/29 More details Close (プロシーディング) 第25回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2009. 東北地方の木質系・農業残渣系バイオマス資源を活用した石炭火力混省システムの設計 Hitoshi Yamamoto, Toshihiko Nakata 4th Conference on Biomass Science　2009/01/13 More details Close (プロシーディング) 第4回バイオマス科学会議講演論文集 日本エネルギー学会 2009. The energy system analysis and forecasts of the Republic of South AFrica International-presentation Invited Juta Matsumoto, Toshihiko Nakata Industrial and commercial use of energy　2008/05/26 Multi-objective evaluation of energy systems for rural electrification in developing countries Diego Silva, Toshihiko Nakata 24th Conference on Energy, Economy, and Environment　2008/01/30 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2008. 熱貯蔵を考慮した地域熱供給システムの設計に関する研究 Genya Fujita, Toshihiko nakata 24th Conference on Energy, Economy, and Environment　2008/01/30 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2008. 発電に伴う排出ガス等外部費用の内生化に関する研究 Hiroki Yamabi, Toshihiko Nakata 24th Conference on Energy, Economy, and Environment　2008/01/30 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2008. 開発途上国のバイオマス資源を利用したエネルギーアクセス向上に関する研究 Satoshi Shimodaira, Toshihiko Nakata 24th Conference on Energy, Economy, and Environment　2008/01/30 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2008. バイオマス燃料を導入する運輸部門エネルギーシステムの統合評価 Yuichiro Deguchi, Toshihiko Nakata 3rd Conference on BIomass Science　2008/01/15 More details Close (プロシーディング) 第3回バイオマス科学会議講演論文集 日本エネルギー学会 2008. 燃焼に伴う排出ガス等外部費用の内生化に関する研究 Hiroki Yamabi, Toshihiko Nakata 45th Symposioum on Combustion　2007/12/05 More details Close (プロシーディング) 第45回燃焼シンポジウム講演論文集 日本燃焼学会 2007. バイオマス燃料を導入する運輸部門エネルギーシステムの統合評価 Yuichiro Deguchi, Toshihiko Nakata 45th Symposium on Combustion　2007/12/05 More details Close (プロシーディング) 第45回燃焼シンポジウム講演論文集 日本燃焼学会 2007. Study on promoting market penetration of IGCC and its environment impact in China&＃39;s electricity sector by considering external cost Wang, Hao, Nakata, Toshihiko 45th Symposium on Combustion　2007/12/05 More details Close (プロシーディング) 第45回燃焼シンポジウム講演論文集 日本燃焼学会 2007. 発展途上国内の地域格差を考慮したエネルギーシステムの最適設計 下平慧, 中田俊彦 第26回エネルギー・資源学会研究発表会　2007/06/13 地域循環型エネルギーシステムの提案 Yasuki Morioka, Toshihiko Nakata 平成19年電気学会全国大会シンポジウム　2007/03/15 応用均衡一般モデルによるクリーンコール技術の経済性評価 Hiroki Yamabi, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. CCSを考慮したクリーンコール技術の導入可能性と経済性評価 Haruki Yoshizaki, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. Evaluation of renewable energy technologies for rural isolated areas of Colombia Diego Silva, Toshihiko Nakata 23ed Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. エネルギー利用技術のテクノロジー・アセスメントに関する研究 Sayuri Ota, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. 家畜排せつ物の分布を考慮したメタン発酵プラントの最適配置と利活用方策の検討 Yoshinori Ito, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. 副生水素を供給源とする分散型水素エネルギーシステムの設計 Hiroyuki Suzuki, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. 廃棄物をエネルギー源とする地域熱供給システムの最適設計 Noboru Tamazawa, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. 発展途上国の貧困削減に向けたエネルギーシステムの最適設計に関する研究 Satoshi Shimodaira, Toshihiko Nakata 23rd Conference on Energy, Economy, and Environment　2007/01/26 More details Close (プロシーディング) 第23回エネルギーシステム・環境・経済コンファレンス講演論文集、エネルギー・資源学会 2007. 木質等バイオマスのエネルギー変換技術のエクセルギー解析 Tetsuya Togasaki, Toshihiko Nakata 2nd Conference on Biomass Science　2007/01/16 More details Close (プロシーディング) 第2回バイオマス科学会議講演論文集 日本エネルギー学会 2007. バイオマスエネルギーの導入に伴う経済波及効果の評価 Yoshinori Ito, Toshihiko Nakata 2nd Conference on Biomass Science　2007/01/16 More details Close (プロシーディング) 第2回バイオマス科学会議講演論文集 日本エネルギー学会 2007. 技術特性および経済性を考慮した地域バイオマス総合利活用システムの最適設計 Yasuki Morioka, Toshihiko Nakata 2nd Conference on Biomass Science　2007/01/16 More details Close (プロシーディング) 第2回バイオマス科学会議講演論文集 日本エネルギー学会 2007. 遊休農地を活用したバイオマス液体燃料梨活用システムの経済性評価 Naohiro Oyama, Toshihiko Nakata 2nd Conference on Biomass Science　2007/01/16 More details Close (プロシーディング) 第2回バイオマス科学会議講演論文集 日本エネルギー学会 2007. 木質バイオマス利用技術のエクセルギー解析 Tetsuya Togasaki, Toshihiko Nakata 日本機械学会熱工学コンファレンス　2006/11/24 More details Close (プロシーディング) 日本機械学会熱工学コンファレンス2006講演論文集. CCSを考慮したクリーンコール技術の導入可能性と経済性評価 Haruki Yoshizaki, Toshihiko Nakata 日本機械学会熱工学コンファレンス　2006/11/24 More details Close (プロシーディング) 日本機械学会熱工学コンファレンス2006講演論文集. 副生水素を供給源とする分散型水素エネルギーシステムの設計 Hiroyuki Suzuki, Toshihiko Nakata 日本機械学会熱工学コンファレンス　2006/11/24 More details Close (プロシーディング) 日本機械学会熱工学コンファレンス2006講演論文集. バイオマスのエネルギー利用の現状と課題 Invited Hiroyuki Suzuki, Toshihiko Nakata 日本鉄鋼協会第152回秋季講演大会　2006/09/16 地域特性および経済性を考慮したバイオマス利活用システムの設計 Yasuki Morioka, Toshihiko Nakata 第15回日本エネルギー学会大会　2006/08/03 More details Close (プロシーディング) 第15回日本エネルギー学会大会講演要旨集 日本エネルギー学会 2006. 地域特性を考慮した自動車用エネルギー作物利活用システムの設計 Naohiro Oyama, Toshihiko Nakata 第15回日本エネルギー学会大会　2006/08/03 More details Close (プロシーディング) 第15回日本エネルギー学会大会講演要旨集 日本エネルギー学会 2006. ＣＨＰ（熱電併給）システムの家庭部門への導入と二酸化炭素削減効果 Toshihiko Nakata 日本エネルギー経済研究所　2006/07/13 バイオマスエネルギーを巡る現状と課題 Invited Toshihiko Nakata 東北地域バイオマス利活用推進連絡会議　2006/05/30 岩手県家庭部門におけるCHP導入に伴うCO2抑制効果および経済性の検討 Shuichi Ashina, Toshihiko Nakata 22nd Conference on Energy, Economy, and Environment　2006/01/26 More details Close (プロシーディング) 第22回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2006. 開発途上国農村部における電化とその社会・経済的影響の解析 Makoto Kanagawa, Toshihiko Nakata 22nd Conference on Energy, Economy, and Environment　2006/01/26 More details Close (プロシーディング) 第22回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2006. 内生的技術進歩モデルの開発とクリーンコール技術の経済性評価への適用 Takemi Sato, Toshihiko Nakata 22nd Conference on Energy, Economy, and Environment　2006/01/26 More details Close (プロシーディング) 第22回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2006. 廃プラスチック利活用のための地域循環システムの最適設計 Noboru Tamazawa, Toshihiko Nakata 22nd Conference on Energy, Economy, and Environment　2006/01/26 More details Close (プロシーディング) 第22回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2006. カントリーリスクとエネルギー源分散を考慮したエネルギーセキュリティーの定量化と統合評価 Kentaro Hirose, Toshihiko Nakata 22nd Conference on Energy, Economy, and Environment　2006/01/26 More details Close (プロシーディング) 第22回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2006. エネルギー貯蔵を考慮した地域総合エネルギーシステムの設計および導入促進策の検討 Manabu Tada, Toshihiko Nakata 22nd Conference on Energy, Economy, and Environment　2006/01/26 More details Close (プロシーディング) 第22回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2006. 岩手県盛岡広域生活圏を対象とした再生可能エネルギーシステムの最適設計およびバイオマス利活用方策の検討 Yoshinori Ito, Toshihiko Nakata 1st Conference on Biomass Science　2006/01/17 More details Close (プロシーディング) 第1回バイオマス科学会議講演論文集 日本エネルギー学会 2006. 資源分布を考慮した木質バイオマス発電の経済性評価 Kenjiro Yagi, Toshihiko Nakata 1st Conference on Biomass Science　2006/01/17 More details Close (プロシーディング) 第1回バイオマス科学会議講演論文集 日本エネルギー学会 2006. エネルギー作物の運輸部門への適用とその経済性評価 Naohiro Oyama, Todhihiko Nakata 1st Conference on Biomass Science　2006/01/17 More details Close (プロシーディング) 第1回バイオマス科学会議講演論文集 日本エネルギー学会 2006. エネルギー・マスフローを考慮した畜産廃棄物利活用システムの設計 Hideaki Kasai, Toshihiko Nakata 1st Conference on Biomass Science　2006/01/17 More details Close (プロシーディング) 第1回バイオマス科学会議講演論文集 日本エネルギー学会 2006. 地域特性を考慮したバイオマスエネルギー利活用システムのビジネスモデル Soichi Sato, Toshihiko Nakata 1st Conference on BIomass Science　2006/01/17 More details Close (プロシーディング) 第1回バイオマス科学会議講演論文集 日本エネルギー学会 2006. 地域特性を考慮したバイオマス利用システムの構築 Invited Kazuo Kubo, Toshihiko Nakata 第14回日本エネルギー学会大会　2005/08/04 Renewable energy policy in Japan: A simulation with a computable general equilibrium model International-presentation Takemi Sato, Toshihiko Nakata International Energy Workshop 2005　2005/07/05 Optimum design and economic effects of renewable energy system for effective utilization of animal manure and wood biomass in rural areas in Japan International-presentation Yoshinori Ito, Toshihiko Nakata International Energy Workshop 2005　2005/07/05 Analysis of the energy access improvement and its socio-economic impacts in rural areas of developing countries International-presentation Makoto Kanagawa, Toshihiko Nakata International Energy Workshop 2005　2005/07/05 Strategy for reducing CO2 emissions in the residential sector in Japan: case study on energy saving measures in the residential sector in Iwate Prefecture International-presentation Shuichi Ashina, Toshihiko Nakata International Energy Workshop 2005　2005/07/05 Penetration of renewable energy in rural areas in Japan International-presentation Toshihiko Nakata ETSAP semi-annual Workshop　2005/07/04 水素貯蔵を考慮した地域総合エネルギーシステムの設計 Manabu Tada, Toshihiko Nakata 第24回エネルギー・資源学会研究発表会　2005/06/09 Learning curve of wind power generation in Japan International-presentation Takemi Sato, Toshihiko Nakata 28th Annual IAEE International Conference　2005/06/03 More details Close Estimating technological progress of emerging technologies such as renewable energy technologies is essential for designing sustainable energy systems and drawing energy policies. Learning curve is a quantitative estimating method for describing the cost decline rate of technologies caused by technological progress and learning. The purpose of this study is to estimate learning curve and learning rate (LR) of capital cost in wind power generation in Japan. As a result, 11% of learning rate was obtained from the analysis using capital cost data, though it included some uncertainty caused by the lack of cost data. Moreover, the difference in correlation was analyzed when classified by the capacity or the country of wind turbine manufacturers. The LR obtained in the study was higher than the one in Germany and Denmark. The reasons behind cost reduction were discussed in the latter section. みやぎの環境を考える会 Invited Toshihiko Nakata 宮城県環境基本計画公聴イベント　2005/03/17 Environmental management and greening of industry from the perspective of energy economics and environmental impacts Invited Toshihiko Nakata 2005/03/08 みやぎの環境を考える会 Invited Toshihiko Nakata 宮城県環境基本計画公聴イベント　2005/02/23 地球環境から見た環境問題への取り組み Invited Toshihiko Nakata 中小企業連携組織支援事業研究会　2005/02/10 再生可能エネルギー利用技術の習熟曲線 Takemi Sato, Toshihiko Nakata 21th Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 163-166. 地域再生可能エネルギーシステムの最適設計と広域バイオマス利活用 Yoshinori Ito, Toshihiko Nakata 21nd Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 191-194. 地域エネルギー・経済モデルを用いた岩手県におけるＤＳＭの経済性 Shuichi Ashina, Toshihiko Nakata 21st Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 207-210. 環境効率に基づく環境経営度の評価と課題 Masatoshi Ikari, Toshihiko Nakata 21st Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 365-368. タイのエネルギー部門におけるＤＳＭによるＣＯ２削減効果の検討 Matchantika Ratananakorn, Toshihiko Nakata 21st Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 517-520. 発展途上国農村部におけるエネルギー・アクセス向上のためのエネルギー・システム設計 Makoto Kanagawa, Toshihiko Nakata 21st Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 633-636. 産業部門エネルギー管理手法の日米比較 Fuyuhiko Noda, Toshihiko Nakata 21st Conference on Energy, Economy, and Environment　2005/01/26 More details Close (プロシーディング) 第21回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2005, 637-640. 地域エネルギーシステムを創る Invited Toshihiko Nakata 環境ビジネス人材育成セミナー　2004/12/02 Economic and environmental analysis of biomass energy system for rural areas in Japan International-presentation Yoshinori Itoh, Toshihiko Nakata International Workshop on Innovative Anaerobic Technology　2004/12/02 みやぎの環境を考える Invited Toshihiko Nakata 公聴イベント 環境地域懇談会　2004/11/28 地域のエネルギーシステムを創る Invited Toshihiko Nakata 地位活性化支援調査事業講演会　2004/10/20 バイオマス資源を活用した地域エネルギーシステムの設計 Invited Toshihiko Nakata 資源・素材2004　2004/09/14 地域のエネルギーシステムを創る Invited Toshihiko Nakata 第13回ＩＮＳ公開講演会　2004/08/28 Biomass based energy system for a rural area in Japan International-presentation Toshihiko Nakata International Energy Workshop 2004　2004/06/22 環境ビジネスプログラム Invited Toshihiko Nakata 東北地域ＭＯＴ（Management of Technology）「技術経営」シンポジウム　2004/02/07 エネルギー利用からみる脱温暖化と経済性 Invited Toshihiko Nakata 宮城県主催 環境問題に関する講演会　2004/01/30 木質バイオマスエネルギー利用の経済性および導入促進政策の検討 Kenjiro Yagi, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 199-202 循環型社会の形成に向けたバイオマス資源の地域エネルギー利用戦略 Kazuo Kubo, Toshihiko Nakata&＃39; 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 211-214 廃棄物処理の最適システム設計と経済性評価 Michiro Urabe, Toshihiko Nakta 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 231-234 地域自然エネルギーシステムの導入による経済波及効果 Yoshinori Ito, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 313-316 中国のCO2排出量削減に向けたエネルギー・経済モデルによる分析 Tetsuya Togasaki, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 403-406 エネルギー需要特性を考慮した自然エネルギーシステムの公共施設への導入 Manabu Tada, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 423-426 経済発展と両立したCO2排出量抑制政策の検討 Matchantika Ratananakorn, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 13-16 クリーンコール技術導入の経済性評価と導入推進オプションの検討 Takemi Sato, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 351-354 地域エネルギー経済モデルを用いた岩手県における環境税導入の影響評価 Shuichi Ashina, Toshihiko Nakata 20th Conference on Energy, Economy, and Environment　2004/01/29 More details Close (プロシーディング) 第20回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2004, 317-320 エネルギー経済学分野における研究動向 Invited Toshihiko Nakata 環境科学研究科研究企画委員会　2003/12/26 地域エネルギー・経済モデルの開発と岩手県への適用 Invited Toshihiko Nakata 岩手県地球温暖化対策セミナー　2003/12/17 組合せの妙： 風と太陽 Invited Toshihiko Nakata 自然エネルギーフォーラム　2003/11/21 Design for renewable energy systems International-presentation Toshihiko Nakata Developing Energy Technology Portfolios to Mitigate Climate Change　2003/08/26 Design for renewable energy systems International-presentation Toshihiko Nakata Special seminar at PNL　2003/08/25 エネルギー経済工学の展開から考える Toshihiko Nakata 学際科学国際高等教育センター研究会　2003/07/25 エネルギー経済工学って何だろう？ Toshihiko Nakata 持続可能社会セミナー　2003/07/18 小型原子炉の最適配置に関する研究 Invited Toshihiko Nakata 日本エネルギー経済研究所　2003/07/07 非線形エネルギー経済モデルによる小型原子炉・自然エネルギー連系システムの設計研究 Toshihiko Nakata 日本原子力研究所　2003/07/01 Evaluation of sustainable energy system International-presentation Invited Toshihiko Nakata The Ist International Symposium on Sustainable Energy System　2003/03/13 小型原子力発電所の導入可能性のシミュレーションモデルによる解析 Shuichi Ashina, Toshihiko Nakata 19th Conference on Energy, Economy, and Environment　2003/01/30 More details Close (プロシーディング) 第19回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2003, 35-40 地域エネルギー・経済モデルの開発と岩手県環境政策オプションの検討 Shuichi Ashina, Toshihiko Nakata 19th Conference on Energy, Economy, and Environment　2003/01/30 More details Close (プロシーディング) 第19回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2003, 93-96 クリーンコール技術の導入についての経済性評価と推進オプションの検討 Ryo Kinugasa, Toshihiko Nakata 19th Conference on Energy, Economy, and Environment　2003/01/30 More details Close (プロシーディング) 第19回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2003, 245-250 循環型社会実現に向けた廃棄物のエネルギー利用及び経済性の検討 Michiro Urabe, Toshihiko Nakata 19th Conference on Energy, Economy, and Environment　2003/01/30 More details Close (プロシーディング) 第19回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2003, 343-348 韓国のエネルギー需要とCO2削減のための政策オプション Makoto Kanagawa, Toshihiko Nakata 19th Conference on Energy, Economy, and Environment　2003/01/30 More details Close (プロシーディング) 第19回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2003, 405-410 総合自然エネルギーシステムの統合評価 Kazuo Kubo, Toshihiko Nakata 19th Conference on Energy, Economy, and Environment　2003/01/30 More details Close (プロシーディング) 第19回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2003, 663-668 Assessment of operational characteristics of small-sized nuclear power in Japan International-presentation Invited Toshihiko Nakata Seventh Nuclear Energy Symposium　2002/08/26 欧州のエネルギー事情について Invited Toshihiko Nakata 東北経済連合会環境エネルギーミッション調査研修会　2002/08/22 総合自然エネルギーシステムの設計 Invited Toshihiko Nakata The Institute of Energy Economics, Japan　2002/07/26 次世代地球系の環境ライフサイクルモデリング Invited Toshihiko Nakata I-RIEP Researchg Seminar　2002/03/06 Global ecology life cycle modeling International-presentation Invited Toshihiko Nakata The Technology and Estimating System for Decrease of Global Warming Gas　2002/02/18 More details Close (プロシーディング) Reduction technology of global warming gases and its evaluation systems Yonsei University 2002 1 12 燃料電池自動車導入に伴う運輸部門エネルギーシステムへの影響 Ryo Kinugawa, Toshihiko Nakata 18th Conference on Energy, Economy, and Environment　2002/01/24 More details Close (プロシーディング) 第18回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2002 77 82 地域需要を考慮した最適電源計画モデルに関する研究 Shuichi Ashina, Toshihiko Nakata 18th Conference on Energy, Economy, and Environment　2002/01/24 More details Close (プロシーディング) 第18回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2002 405 410 水素利用カーボンレス・エネルギーシステムの統合評価 Toshihiko Nakata 18th Conference on Energy, Economy, and Environment　2002/01/24 More details Close (プロシーディング) 第18回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2002 639 644 Role of nuclear power: Hydrogen-based, carbonless energy systems International-presentation Invited Toshihiko Nakata The Sixth Nuclear Energy Symposium　2001/07/16 エネルギー経済モデルの感度解析に関する研究 Invited Toshihiko Nakata&＃39; The Japan Institute of Energy Economics, Japan　2001/07/06 エネルギー・経済モデルに基づく技術評価とエネルギー戦略 Invited Toshihiko Nakata 京都大学第13回エネルギー社会システム計画研究談話会　2001/02/02 ハイブリッド自動車導入による二酸化炭素排出量の削減効果 Ryo Kinugasa, Toshihiko Nakata 17th Conference on Energy, Economy, and Environment　2001/01/25 More details Close (プロシーディング) 第１７回エネルギーシステム・経済・環境コンファレンス講演論文集 エネルギー・資源学会 2001 611 616 不連続性の導入によるエネルギー・経済モデルの感度解析 Shuichi Ashina, Toshihiko Nakata 17th Conference on Energy, Economy, and Environment　2001/01/25 More details Close (プロシーディング) 第１７回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2001 405 410 新技術の影響を取り入れたエネルギー経済モデルによる炭素税の評価 Toshihiko Nakata 17th Conference on Energy, Economy, and Environment　2001/01/25 More details Close (プロシーディング) 第１７回エネルギーシステム・環境・経済コンファレンス講演論文集 エネルギー・資源学会 2001 641 646 Cleaner Vehicles for Reducing CO2 Emissions from Transportation in Japan International-presentation Toshihiko Nakata Externalities in the Urban Transport　2000/10/26 Comparison of Carbon Emissions Utilizing Different Residential Heating Systems in Mountainous Areas International-presentation Kazuyoshi Nemoto, Toshihiko Nakata, Shogo Nakamura, Yasuhumi mori, Makoto Ooba e-EUBCE 2020 - 28th European Biomass Conference and Exhibition　2000/07/08 Energy and Economic Model International-presentation Invited Toshihiko Nakata Seoul National Univfersity, Special Seminar　2000/06/07 Hybrid vehicles in Japan and its impact on energy systems International-presentation Invited Toshihiko Nakata UC Berkeley, RAEL seminar　2000/04/19 The Role of Nuclear Power in the Area of Climate Change International-presentation Invited Toshihiko Nakata International Symposium on Energy Future in the Asia/Pacific Region　2000/03/27 二酸化炭素排出量に及ぼす原子力フェイズアウトの影響 Toshihiko Nakata 16th Conference on Energy, Economy, and Environment　2000/01/27 More details Close (プロシーディング) 第１６回エネルギーシステム・経済・環境コンファレンス講演論文集 エネルギー・資源学会 2000 357 362 Analysis of the Impacts of Alternative Technologies on Energy-Environment Systems International-presentation Invited Toshihiko Nakata POSTECH Environmental Seminar　2000/01/18 Energy Models and Its Application on Clean Coal Technologies International-presentation Invited Toshihiko Nakata Chonbuk National University, Special Seminar　1999/11/21 Analysis of the Impacts of Alternative Technologies on Energy Systems in Japan International-presentation Invited Toshihiko Nakatal Graduate School of Economics, Yonsei University, Special Seminar　1999/09/22 代替技術が日本のエネルギーシステムに及ぼす影響解析 Invited Toshihiko Nakata The Institute of Energy Economics, Japan　1999/09/17 Analysis of Energy Systems for the Reduction of CO2 Emission in Japan International-presentation Invited Toshihiko Nakata International Symposium on Energy Future in the Asia/Pacific Region　1999/03/15 炭素税及びエネルギー税による二酸化炭素排出量の削減効果 Toshihiko Nakata 15th Conference on Energy, Economy, and Environment　1999/01/28 More details Close (プロシーディング) 第１５回エネルギーシステム・経済・環境コンファレンス講演論文集 エネルギー資源学会 1999 1 6 Impacts of CO2 Constraints on Energy Systems in Japan International-presentation Toshihiko Nakata 19th Annual North American Conference of the USAEE/IAEE　1998/10/18 More details Close (プロシーディング) 1998 1 10 The effect of new technologies on environmental emissions in the US-scale energy systems International-presentation Toshihiko Nakata Gordon Research Conference　1998/06/07 To Promote Cultural Awareness and an Appreciation for Our Asian Heritage International-presentation Invited Toshihiko Nakata LLNL, Asian Pacific American Council (APAC)　1998/05/27 Idea, Background and Status of Sustainability R&D Activities at Tohoku University International-presentation Invited Toshihiko Nakata LLNL EMATT Technical Meeting　1997/03/11 Reaction Kinetics of Fuel NOx Formation for Gas Turbine Conditions International-presentation Toshihiko Nakata ASME/JSME Thermal Engineering Joint Conference　1995/03/19 More details Close (プロシーディング) Proceeding of the JSME/ASME Thermal EngineeringJoint Conference 1995 ASME 1995 227 234 石炭ガス化ガス燃料中のアンモニアの分解に関する研究(第2報 燃料中の可燃性成分がアンモニア分解特性に及ぼす影響) 長谷川 武治, 佐藤 幹夫, 中田 俊彦 第32回燃焼シンポジウム　1994/11/21 More details Close 石炭ガス化複合発電方式では，燃料中のNH3を事前に乾式で除去することが可能となれば，石炭ガス化燃料を用いるガスタービン燃焼器の開発が容易となる．本研究は，石炭ガス化燃料中のNH3の分解に及ぼす反応温度の影響や，反応後のNH3とNOの濃度の和を最小とする添加NOとO2の最適濃度，さらに燃料中のCOとH2がNH3の分解特性に及ぼす影響について，管型気相反応器を用いた実験と素反応モデルによる反応動力学解析から検討したものである． ガスタービン燃焼器のフュエルNOx生成特性とその低減 Invited Toshihiko Nakata&＃39; 日本燃焼学会講演討論会「環境にやさしい燃焼技術」　1993/12/07 石炭ガス化中カロリー燃料のNOx生成特性 中田 俊彦, 佐藤 幹夫, 長谷川 武治 第31回燃焼シンポジウム　1993/11/22 More details Close 著者らは，これまでに石炭ガス化低カロリー燃料燃焼に伴い生成するNOxの生成機構の解明と，ガスタービン低NOx燃焼器の開発を進めてきた．本研究では，石炭ガス化中カロリー燃料用の低NOx燃焼器の開発を目的として，小型拡散バーナを用いてサーマルNOｘおよびフュエルNOxの生成特性，さらに二段燃焼法などによりNOx低減効果について検討した． Preliminary Combustion Tests of a 1500 C-Class Gas Turbine Combustor for IGCC International-presentation Toshihiko Nakata JSME-ASME International Conference on PowerEngineering-93　1993/09/12 More details Close (プロシーディング) Proceedings of JSME-ASME International Conferenceon Power Engineering-93 ASME, JSME 1993 445 450 石炭ガス化燃料中のアンモニアの分解に関する研究 中田 俊彦, 佐藤 幹夫, 長谷川 武治 第30回燃焼シンポジウム　1992/12/07 More details Close 著者らは，燃料中のNH3を分解，除去する方法を検討し，反応動力学の計算から，微量のNOとO2が共存し約1000℃の高温条件であればNH3が分解する結果を得た．本研究では，燃料中のCOやH2がNH3の分解に及ぼす影響を明らかにするために，可燃成分の総量を一定とし組成の異なる3種の燃料ガスを用いて基礎的実験を行った．さらに，実験と同一条件で反応動力学計算を行い，NH3分解の反応機構を考察した． 石炭ガス用ガスタービン燃焼器の流れの数値シミュレーション 中田 俊彦, 佐藤 幹夫, 三浦 正一, 佐藤 衣代 第29回燃焼シンポジウム　1991/12/09 More details Close ガスタービン燃焼器内の現象は, 旋回と循環流を伴う三次元の乱流と, 素反応レベルの化学反応が複雑に組み合わされている. 乱流モデルや反応モデルを数値シュミレーションに導入すれば, コンピュータの負荷を軽減し, 比較的容易に結果か得られる. しかし, これらのモデルの使用は, 流れや反応現象に対しての大幅な仮定を意味し, 実現象の把握がそれだけ不十分になる可能性もある. 境界条件, 計算領域の形状との適合性なども問題である. 著者らは, 乱流についてはN-S（Navier-Stokes）方程式を直接的に計算する方法を, 化学反応については分子レベルの素反応を考慮した方法について, それぞれ検討を進めてきた. Yokohama International Congress Hall International-presentation Toshihiko Nakata 1991 Yokohama International Gas Turbine Congress　1991/10/27 More details Close (プロシーディング) Proceedings of the 1991 Yokohama International Gas Turbine Congress 1991 Development of a LBG Fueled Low NOx Combustor International-presentation Toshihiko Nakata 1991 Yokohama International Gas Turbine Congress　1991/10/27 More details Close (プロシーディング) Proceedings of the 1991 Yokohama International Gas Turbine Congress 1991 65 72 石炭ガス化燃料の燃焼特性（NOx排出特性に及ぼすメタン濃度の影響） 山内 浩二, 佐藤 幹夫, 中田 俊彦 第27回燃焼シンポジウム　1989/12/04 More details Close 次世代の火力発電システムとして，高効率で環境保全性に優れた石炭ガス化複合発電の開発が進められている．石炭ガス化燃料はフュエルNOxの生成源を有しているため，燃焼器開発には，石炭ガス化燃料の燃焼諸特性を把握する必要がある．本研究は実際のガス化燃料により近いガス組成の燃焼特性を把握するために，燃料中に含まれるメタン濃度の影響をラボスケールの燃焼試験設備を用いて詳細に検討した． Combustion Characteristics of Coal Derived Gaseous Fuel International-presentation Toshihiko Nakata International Conference on Coal Science　1989/10/23 More details Close (プロシーディング) Proceedings of 1989 International Conference on COAL SCIENCE NEDO 1989 277 280 Development of a Low-NOx LBG Combustor for Coal Gasification Combined Cycle Power Generation Systems International-presentation Toshihiko Nakata International Gas Turbine and Aeroengine Congress and Exposition　1989/06/04 More details Close (プロシーディング) ASME Paper 89-GT-104 ASME 1989 1 8 石炭ガス化燃料中のアンモニアの分解反応解析(第2報 窒素酸化物添加の影響) 山内 浩二, 佐藤 幹夫, 中田 俊彦 第26回燃焼シンポジウム　1988/11/28 More details Close 本研究では前報に引き続いて石炭ガス化燃料中のNH3を微量O2により除去する方法に関して，窒素酸化物添加の影響について検討を行った． 石炭ガス化燃料中のアンモニアの分解反応解析(第1報 酸素によるアンモニアの分解反応) 佐藤 幹夫, 中田 俊彦, 山内 浩二 第26回燃焼シンポジウム　1988/11/28 More details Close 本研究は，石炭ガス化燃料の高温域に微量の酸素を注入することによりアンモニアを分解させる方法について素反応式を用いた反応解析により検討を行ったものである． 微粉炭燃焼に伴うNOx，灰中未燃分の排出特性（第2報 混炭燃焼時の排出成分） 佐藤 幹夫, 牧野 尚夫, 中田 俊彦, 二宮 徹 第25回燃焼シンポジウム　1987/11/02 More details Close 本研究は，微粉炭燃焼量100kg/hの単一バーナの石炭燃焼試験炉を用いて，各種石炭の燃焼試験をおこない，主にNOx排出特性と灰中未燃分排出特性について混炭時の石炭性状との関係を示したものである． 微粉炭燃焼に伴うNOx，灰中未燃分の排出特性（第1報 石炭性状の及ぼす影響） 中田 俊彦, 佐藤 幹夫, 牧野 尚夫, 二宮 徹 第25回燃焼シンポジウム　1987/11/02 More details Close 本研究は，我国で使用されている発電用石炭のうち主要な28炭種の燃焼試験を実施し，石炭性状からNox排出濃度および灰中未燃分濃度を予測する手法について検討したものである． 回転体への凝縮熱伝達 中田俊彦, 熊谷哲, 武山斌郎 第22回伝熱シンポジウム　1985/05/20 Guideline for regional energy sytem design Invited Toshihiko Nakata Smart Grid Lab.　2021/02/22 持続可能性を考慮した市区町村別木質バイオマスポテンシャルの推計 根本 和宜,中田 俊彦 Show all Show first 5 Industrial Property Rights 5 自然エネルギー・地中熱併用システムおよびその運転方法 高杉真司, 池内研, 佐藤敬二, 桑野恭, 新妻弘明, 新堀雄一, 中田俊彦 Property Type: Patent ガスタービン燃焼器 3342920 Property Type: Patent ガスタービン燃焼装置 2873638 Property Type: Patent ガスタービン燃焼器 Property Type: Patent ガスタービン燃焼器 2755603 Property Type: Patent Research Projects 21 Creating a decarbonized community in a widely merged town Toshihiko Nakata Offer Organization: Ministry of the Environment, Government of Japan System: Region with a high decarbonization rate and a high probability of extinction Category: Aiming to expand the virtuous circle of the economy within the region, starting with Miyako City&＃39;s version of the Stadtberke. Institution: Tohoku University 2022/11 - 2031/03 More details Close In the &＃34;central city area&＃34; and the &＃34;Taro area&＃34; that was redeveloped as a result of the earthquake reconstruction, solar power generation and storage batteries will be installed in residences to the maximum extent, and solar power generation on idle land in the Taro area will be used as nighttime interconnected solar power generation. The introduction of domestic medium-size wind power generation will also help to maximize the use of renewable energy and achieve decarbonization. In addition, the Miyako City version of the Stadtberke framework will be used to create a virtuous cycle of local economy through local production for local consumption of energy, and the proceeds will be used to maintain public transportation systems, etc. Exploring the feasibility of &＃39;servitization of technology&＃39; taking into account internal carbon pricing. Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (C) Institution: Tohoku University 2022/04/01 - 2026/03/31 Consortium for Co-creation of Electric Power and Telecommunications Convergence Networks Competitive Toshihiko Nakata Offer Organization: Japan Science and Technology Agency System: Program on Open Innovation Platform with Enterprises, Research Institute and Academia Category: Creation of infrastructure technology for converged power and telecommunications networks to realize the overall optimization of autonomous, decentralized, and cooperative DC microgrids Institution: Tohoku University 2021/11 - 2025/03 More details Close Create a smart city/compact city urban OS that can respond quickly and flexibly to changes in industrial structure, such as the streamlining and upgrading of functions and services in cities and regions in the Society 5.0 era, as well as digital transformation and subscriptions. In addition, in order to realize economical mass deployment of renewable energy, research and development will be conducted on a power and ICT network convergence infrastructure with scalability and resilience, optimized in terms of &＃34;power supply to ICT systems&＃34; and &＃34;power flexibility between DC microgrids utilizing ICT&＃34; by linking ICT and power networks. Research and development of a network convergence infrastructure for power and information communications with scalability and resilience. Energy systems of an Internet of Energy (IoE) society Competitive Toshihiko Nakata Offer Organization: Cabinet Office of Japan, System: Cross-ministerial Strategic Innovation Promotion Program Category: Analysis of sectoral coupling of electricity, heat, and transportation and design of a cross border zone Institution: Tohoku University 2020/09 - 2023/03 More details Close In this study, we will define a wide-area energy system that includes regional cooperation, and examine a system design method that optimizes the &＃34;whole&＃34; system, which promotes the utilization of renewable energy, drastic reduction of CO2 emissions, and regional economic circulation in a wide area. Through the analysis of factual data and the formulation of guidelines necessary for regional energy system design, we will contribute to the transition to a decarbonized society and the improvement of the resilience of regional energy supply and demand. Research on the planning of a regional recycling symbiosis zone utilizing regional resources and interregional cooperation and the integrated evaluation of its social and economic effects Competitive Toshihiko Nakata Offer Organization: Ministry of the Environment, System: Environment Research and Technology Development Fund (ERDF) Category: Development of a Method for Analyzing the Distribution of Regional Resources and Interregional Cooperation Considering the Changes in Land Use Institution: Tohoku University 2020/04 - 2023/03 More details Close In order to make a regional recycling symbiosis zone sustainable in the long term, it is essential to consider future changes in population distribution and urban area in the evaluation of regional resources and planning stage of the system. In this study, we first evaluate the future changes in land use, taking into account population decline, and then clarify the spatial distribution and total amount of population and service demand in the region. Then, taking these factors into account, we quantitatively evaluate 2) the quality and quantity of local energy resources, such as renewable energy and energy use of waste, and stock-type local resources, such as forest resources, construction and demolition materials, and civil engineering infrastructure, including their spatial distribution. Based on these results, we will consider and propose 3) systems and measures to circulate and utilize local resources within the region and 4) how to link regions with different quality and quantity of local resources to establish inter-regional circulation, taking into account the perspectives of resource transportation and fund circulation. In addition, we will combine the results of these studies into a regional AIM, and utilize the results of previous studies, the Ministry of the Environment&＃39;s projects, innovative environmental innovation strategies, and the Regional Economic Analysis System (RESAS), etc. 5) An integrated &＃34;Design and Evaluation of Regional Circulation Symbiosis Blocs&＃34; to evaluate the social and economic effects of planning and implementing regional circulation symbiosis blocs that utilize regional resources and interregional cooperation. The results will be presented in academic journals and at international conferences to enhance their academic quality. The effectiveness of the method will be verified and improved by discussing the results with local governments that have already established cooperative research systems. We will also discuss the results with local governments that have already established cooperative research systems to verify and improve the effectiveness of the methods. Through this series of research, we will also derive implications for the creation of a regional recycling symbiosis zone in Japan as a whole. Commissioned work for a study of information utilization and provision measures related to renewable energy introduction potential Competitive Toshihiko Nakata Offer Organization: Ministry of the Environment, System: Commissioned work for a study of information utilization and provision measures related to renewable energy introduction potential Category: Enhancement and elaboration of renewable energy potential Institution: Tohoku University 2021/04 - 2022/03 More details Close (1) Elaboration of information on installation potential (2) Estimation of new potential information using actual data of past renewable energy resources Demonstration of a method for strengthening locally-produced and locally-consumed energy systems through inter-regional cooperation and mutual complementation Competitive Toshihiko Nakata Offer Organization: Ministry of the Environment, System: Technology Development and Demonstration Project for Enhancing CO2 Emission Reduction Measures Institution: Tohoku University 2020/04 - 2022/03 More details Close There is a need to realize a decarbonized society and a high level of resilience against disasters, but there are many issues to be solved for both of them, such as independence and economic efficiency. In this project, we aim to establish a system that enables wide-area cooperation and mutual complementation of locally produced energy (renewable energy) and regulated power sources (private power generation facilities, etc.) and a highly resilient micro-grid system, as well as a platform system that enables various industries and participants to track renewable energy and renewable energy value. In addition, we will build a platform system that enables various industries and participants to track renewable energy and renewable energy value, thereby lowering the hurdle for expanding the use of renewable energy and contributing to CO2 reduction. Design of CO2 free hydrogen supply system achieving both low carbon and resilience Furubayashi Takaaki Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (C) Institution: Tohoku University 2017/04/01 - 2020/03/31 More details Close This study aims to design a regional energy system considering CO2 free hydrogen. The target area is regional municipals in Tohoku region. First of all, the renewable energy potential such as solar PV and wind power was analyzed using geographical information system. The CO2 free potential was estimated from renewable energy potentials and electricity demand in target area. The energy efficiency, CO2 reduction, and cost to utilize hydrogen into electricity generation, heat production, or transportation fuel are analyzed. Finally, the regional energy system, which renewable energy in target area and CO2 free hydrogen meet energy demand, was designed. Accuracy and limits of seasonal prediction of global food prices using crop, energy and economic models based on seasonal climate forecast data Kunimitsu Yoji Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (B) Institution: National Agriculture and Food Research Organization 2016/07/19 - 2020/03/31 More details Close Agricultural meteorological disasters due to droughts and heat waves accelerated by future climate change may soar food prices and induce global political and economic turmoil. This study developed the economic model linked with crop and energy models to predict crop yields as well as food prices in each country all over the world. By using this method, the prediction accuracy of food price changes based on the results of seasonal forecasts at 3 or 6 months ahead by the global climate model was quantified, and limits of the food price prediction were evaluated. As a result, food price changes in countries around the world 3 to 6 months ahead can be predicted with an accuracy of about 20%. Although the accuracy decreases as the period increases, the accuracy decrease due to the 3 month extension is less than 10%. The accuracy can be further improved by considering the oil price changes. Based on these results, this study proposed some implications for agricultural and economic policies. Development of Analytical Models for Low Carbon Re-development Planning coupling with Resources and Energy Use, and their Application to Municipalities Competitive Toshihiko Nakata Offer Organization: Ministry of the Environment, System: Environment Research and Technology Development Fund Category: Development and demonstration of a design method for regional centers for sustainable resource and energy use Institution: Tohoku University 2017/04 - 2020/03 More details Close In this study, we developed a design method for regional centers as a design tool to realize a low-carbon regional energy system using renewable energy. First, we estimated the energy demand and renewable energy installation potential of the target region based on statistical data and geographic information. Next, we developed a regional energy and economic model that takes into account the market equilibrium of renewable energy resources inside and outside the region, and predicted the transition of energy supply structure in the region by dynamic simulation. As a result, it was clarified that it is desirable from the viewpoint of economic rationality to introduce energy resources from inside and outside the region in an appropriate ratio, and it was suggested that it is important to consider resources from inside and outside the region from a bird&＃39;s eye view when designing a regional energy system. In addition, we analyzed the energy supply and demand characteristics of 1,741 cities, wards, towns, and villages in Japan, and designed a trial wide-area zone for integrating renewable energy among the regions. As a result of analyzing the energy system of the designed wide-area region, it was confirmed that a wide-area region could be formed nationwide, mainly in the Tohoku region. In addition, it was found that the formation of a wide-area zone can be expected to have a certain effect in solving regional energy policy issues such as inconsistency in energy supply and demand and lack of financial resources. Optimum design for a smart energy system considering energy resources and technology learning Nakata Toshihiko Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (B) Institution: Tohoku University 2013/04/01 - 2017/03/31 More details Close The regional energy systems have been designed in this study. First, the energy consumption and supply on a prefectural scale are analyzed and visualize. The regional energy demand distribution is compared with the potential of renewable energy. This study indicates that development of local energy systems, especially local heat supply system, is important to introduce local renewable energy, and introduction of renewable energy leads to more balanced regional energy demand-supply distribution. Second, the frameworks that evaluate energy security and energy resilience quantitatively to design a sustainable energy system are established. Further, a two- factor learning curve is employed, and the impact of the learning effect on the dynamic diffusion of major renewable technologies is quantified. Finally, the optimum regional energy system for low carbon and higher resilience is designed. The designed systems are suggested to the municipal government as smart energy plan. Demonstration of an advanced system for halving CO2 emission intensity of coal-fired power plants by high ratio co-firing of biomass Competitive Toshihiko Nakata Offer Organization: Ministry of the Environment, System: Technology development and demonstration project for enhanced CO₂ emission reduction measures Institution: Tohoku University 2013/04 - 2016/03 More details Close With the ultimate goal of establishing a total energy system that efficiently and economically utilizes unused wood in Japan for power generation projects that can be expected to generate large amounts of demand on a stable basis over the long term, a demonstration test was conducted using commercial power plant equipment to demonstrate the high ratio of co-firing from forests in a wide area to power plants. The results of this demonstration will promote the introduction of biomass into many 500 MW class coal-fired power generation facilities in Japan, and at the same time, encourage forestry related parties to actively produce lumber for the total system flow of biomass co-firing and the scope of each issue. Design principle of a smary community for local revitalization and its implementation NAKATA Toshihiko, FURUBAYASHI Takaaki Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Challenging Exploratory Research Institution: Tohoku University 2013/04/01 - 2015/03/31 More details Close The purpose of this study is to design the smart community system based on energy flow and energy map in Tohoku area that was damaged by the Great East Japan Earthquake. Energy flow shows the quantities of primary energy supply of each fuel, energy conversion efficiencies of each technology, and energy consumptions of each sector. Energy map consists of the layers such as resource distribution, road network, and demand distribution. As case studies, the district heating systems (DHS) using local resources in Mogami town, Miyako city, Ofunato city, and Hirosaki city are designed based on the energy map of heat demand. The heat transportation network and the plant location are optimized with cost minimization by solving mixed integer linear programming. As a result, DHS is installed in central area of each city even if the heat density is less than 4.2TJ/ha that is conventional baseline of DHS in Japan. Obtained results are cited in the reports of smart community framework in each city. Feasibility study on synergy technology of biomass supply networks in east Asia NAKATA Toshihiko, FURUBAYASHI Takaaki, KUNIMITSU Yoji Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (B) Institution: Tohoku University 2011/04/01 - 2015/03/31 More details Close This study has evaluated the potentials of biomass resources and technologies, and economic ripple effect by using biomass energy in the East Asia. Potential of biomass resources such as rice, cassava, maize, sorghum, sugar beet, sugar cane, sweet potatoes, and wheat are evaluated by using the geographical information system (GIS) and FAO database. The database of conversion technologies considering the learning effect is developed. As a case study, the economic ripple effect of bio-ethanol production is evaluated by using inter-regional Input-Output table of 9 countries of ASEAN estimated from the GTAP-7 (Global Trade Analysis Project, ver. 7). Two cases are considered. One is that the bio-ethanol needed to E10 in each countries is produced in their own countries. Another is that the bio-ethanol production location is optimized with CO2 emission minimization, and the international transportation is considered. Development of High Ratio Biomass Co-firing Technology for Halving CO2 Emissions Intensity of Coal Fired Power Plants Competitive Toshihiko Nakata Offer Organization: Ministry of the Environment, System: Global Warming Countermeasures Technology Development Project Institution: Tohoku University 2011/04 - 2013/03 More details Close To develop a boiler system that can burn high ratio of bios based on pulverized coal-fired boiler, which is the most efficient commercial system at present for solid fuel utilization. Development of systems approach methodology for optimized design of biomass energy system NAKATA Toshihiko Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (C) Institution: Tohoku University 2009 - 2011 More details Close In this study, the methodology to evaluate the energy balance, economic impact, and environmental impact of biomass energy system is developed. The biomass energy system, which consists of resource node, transportation node, fuel production node, and energy conversion node, considering local characteristics is designed. As results of this study, the improvement of energy conversion efficiency and the rate of material recycle, the economic ripple effects in the local area, and the forwarding the low carbon society are expected 知財創出人材の実践的養成 Competitive 中田俊彦 Offer Organization: 文部科学省 System: 科学技術振興調整費 Category: 新興分野人材育成 Institution: 東北大学 2003/04 - 2008/03 More details Close 知的財産の創造から活用までの活動を活性化する視点から、日本では「知的財産関連専門人材の養成」が急務となっている。このようなニーズの認識に基づき、大学院工学研究科技術社会システム専攻（MOST）が母体となって設置された本人材養成ユニットは、東北大学の強みである実用化指向の研究現場と市場との近接性をフルに活用し、知的財産の創造を、その活用までも視野に入れた上で実践していく「知的創出人材の実践的養成」を目標とする。 Design of integrated renewable energy system for rural area to promote biomass utilization NAKATA Toshihiko Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (C) Institution: Tohoku University 2005 - 2007 More details Close The research studies the following subjects: 1. Biomass resources and available conversion technologies in the target area, 2. Development of an energy-economic model considering the economics and operations of rural energy system, 3. Design of integrated energy systems for rural area by the analysis of climate conditions, demand changes deriving energy-economic model, 4. Building the way of designing energy systems for the use of biomass resources as a fuel in rural area. 5. Clarify the target of biomass conversion technologies for practical use of biomass resources. First we have developed the application of GIS database for use in bio-fuel based transportation systems. The amount of bio crops in different area is qualified, including soil condition, the type of agricultural crops, and local climate conditions. Then, an energy market where electricity and heat are supplied and distributed based on the market equilibrium is designed. Different conversion technologies are introduced according to market competitiveness such as capital costs and O&M costs. The study also considers the scale of economy leading an cost reduction, transportation costs from biomass farms to conversion plants, revenues by selling electricity from biomass power to utilities. The cost minimum configuration of the energy system is finally derived through the research. The important finding is an integrated approach for biomass utilization, because the single approach does not work well having different dimensions. Biomass itself has several dimensions such as carbon neutral emissions, internalization of externality of wastes, and market competitiveness. The study has shown the idea of integrating different dimensions in order to integrate the rural energy system using biomass as a fuel. Establishment of design methodology of integrated renewable energy systems and its demonstrative test. NIITSUMA Hiroaki, ASANUMA Hiroshi, NAKATA Toshihiko, NIIBORI Yuichi, TSUCHIYA Noriyoshi Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (A) Institution: Tohoku University 2003 - 2005 More details Close This research was carried out to establish a design methodology of integrated renewable energy systems and to demonstrate/evaluate its performance throughout experimental study. Major results from this project are as follows : 1. Medeling (1), We have coded integrated RE systems which include Geo-HP, PV, wind turbine and made it possible to evaluate its transient performance and cost/environmental effect. 2. Evaluation of response of the Geo-HP system (1), The performance of Geo-HP system with water storage was evaluated by a simulation code. (2), The flow of water and heat in the permeable formation was modeled by means of FEM. 3. Investigation of the model (1), Optimum system and its performance was evaluated to some model field in Tohoku area. (2), Predictive model using previous information on demand/supply. 4. Data collection and simulation at model fields. (1), Three model fields were selected in Tohoku area and renewable energy systems were designed to each site. (2), Historical change of the energy systems were made at a village. (3), FS on introduction of the RE systems to a new campus of Tohoku University was made. 5. Demonstrative study (1), A model system of PV, wind turbine and Geo-HP was build in Tohoku University and its performance and operating style was experimentally investigated. (2), A system with a micro-hydro and Geo-HP at Higashi-Hachimantai field was designed and its performance was evaluated by simulation. Design and optimization of integrated renewable energy systems NAKATA Toshihiko Offer Organization: Japan Society for the Promotion of Science System: Grants-in-Aid for Scientific Research Category: Grant-in-Aid for Scientific Research (C) Institution: Tohoku University 2002 - 2003 More details Close Based on the two years research commencing 2002, we have designed distributed renewable energy system for rural town in Japan. Following results are obtained. 1.Defined energy component for the energy systems. Biomass resources are included for designing the combined heat and power system. Solar PV and wind power are also included for the system. 2.Designed energy system for both lower costs and stable operation. Two energy systems are designed. One is electricity supply system for Kuzumaki town in Iwate prefecture, and the other is combined heat and power system at a cattle ranch. From the analysis, the price of inverse onerous contract for cow manure has strong affect for introducing biomass derived energy for the system. 3.Discussion for environmental impacts Carbon emission are reduced to half level compared to conventional energy systems. Total costs for capital, operational and maintenance shows equivalent to the current system. 開発途上国への石炭新利用技術導入の技術マーケットモデリング 中田 俊彦 Offer Organization: 日本学術振興会 System: 科学研究費助成事業 Category: 奨励研究(A) Institution: 東北大学 1998 - 1999 More details Close 二酸化炭素(CO_2)排出量増加に伴う地球環境問題と、原子力プラントに付随するリスクをどのように勘案するかは未だ不明確である。さらに、近年の電気事業の自由化に伴って、発電コスト等の経済性を一層重視する傾向が強まってきた。市場競争力と地球環境の両方に適うエネルギー技術・政策が、国家のエネルギーセキュリティにとってきわめて重要になっている。本研究では、エネルギー・経済モデルを用いて原子力発電のフェイズアウト(段階的廃止)を想定した解析を行い、わが国のエネルギーシステムに及ぼす影響を検討した。 その結果、原子力フェイズアウトによる主な影響は、発電部門における石炭とガスの消費であることが明らかになった。原子力発電は廃止されるに伴って、石炭とガスを燃料とする発電が増加し、結果としてCO_2排出量も増大する。解析に基づいて下記の結論が得られた。 ・ 原子力フェイズアウトとは、原子力エネルギーから石炭やガスなどの化石燃料への移行を促し、結果として発電部門からのCO_2排出量を増加させる。 ・ CO_2排出量を削減するためには、炭素含有量の低い燃料への移行とエネルギー消費量の減少が必要となる。再生可能エネルギーのような新たなエネルギー変換技術の到来は、エネルギー消費量の削減に効果が期待できる。 ・ 各ケースを比較して、需要サイドヘの費用負担は概ね同等であった。CO_2排出量の減少にはエネルギー消費量の低下が伴い、高効率機器への転換が進んだことも一因となっている。 Show all Show first 5 Teaching Experience 16 Regional future studies　Tohoku Institute of Technology Undergraduate (liberal arts) Carbon Neutral Applications　Tohoku University Postgraduate Carbon Neutral Fundamentals　Tohoku University Postgraduate Introduction to Managements Science and Technology　Tohoku University Undergraduate (specialized) Decarbonized society from energy perspectives　The Open University of Japan Undergraduate (specialized) Advanced Mechanical Engineering　Nihon University Experiment on mechanical engineering 2　Tohoku University Heat Transfer　Tohoku University Undergraduate (specialized) Advanced Energy Systems and Society　Tohoku University Energy Systems and Society　Tohoku University Designing sustainable energy and society　The Open University of Japan Introduction to technology Management　Tohoku University Systems engineering　Tohoku University Risk Analysis　Meiji University Postgraduate Introduction to technology Policy　Tohoku University heat Transfer　National Institute of Technology,Sendai College Show all Show first 5 Social Activities 101 RENKEI Programme Summer School 2014/09/07 - 2014/09/14 More details Close British Council が主催する日英各6大学間のRENKEIプログラムひとつとして、サマースクールを主催した。テーマは、英国Southamption大学と Energy Supply within Traditional and Environmentally Conscious Growth Models（従来型と環境配慮型の成長モデルから考えるエネルギー供給とは）である。 新エネルギー・産業技術総合開発機構「国際共同研究調査事業」調査員 2003/04 - 2004/03 More details Close エネルギー経済モデルの高性能化 カリフォルニア大学主催アジア太平洋原子力エネルギー研究会メンバー 1998/11 - 2002/03 More details Close 原子力エネルギーのアジア地区への導入促進 宮城県教育庁女性指導者養成研修事業（環境分野）講師 2002/01 - 2002/02 More details Close 環境に関わる女性指導者の養成 新エネルギー・産業技術総合開発機構「国際共同研究調査事業」調査員 2000/10 - 2001/03 More details Close エネルギーシステム設計の数理モデルについて、海外の動向を調査する。 韓国外務省委託「新エネルギー技術の開発途上国への技術移転方策研究会」メンバー 1999/07 - 2001/01 More details Close 開発途上国へのグリーン技術の移転について、論述する。 豊田理化学研究所研究嘱託 1994/04 - 1996/03 More details Close エネルギーシステムのデザインについて、研究調査を進める。 電力中央研究所有識者会議「トリレンマとパラダイム転換」委員 1992/12 - 1993/08 More details Close 環境調和型の経済成長のあり方に関する勉強会 DIYで快適な暮らし エネルギーを賢く使おう せんだい環境学習館たまきさんサロン講座 2019/04/20 - More details Close 家庭内のエネルギーを賢く使う工夫や、夏は涼しく冬は暖かい快適な生活を送るためのDIY活用術を学びます。 平成29年度環境カウンセラー研修講師 2017/12/01 - More details Close 国連SDGsからエネルギーを考える 第一回宮城県地球温暖化防止活動推進員研修 2017/10/14 - More details Close 持続可能なエネルギー社会を作る 弘前型スマートシティ推進協議会 2017/09/20 - More details Close 講演「持続可能なエネルギーシステムの統合デザイン」 電源地域振興センター研修 2017/08/29 - More details Close 講師として、福島12市町村職員を対象として「復興まちづくりと地域エネルギーシステム」について講義した。 仙台市せんだい豊齢学園 2017/08/28 - More details Close 講師として、「資源の重要性と再生可能エネルギーの可能性と課題」について授業した。 東北都市環境問題対策協議会講師 2016/11/11 - More details Close エネルギーを地域から変えるスマートコミュニティのデザイン 仙台商工会議所工業部会講演会 2016/10/27 - More details Close エネルギーから地域を変えるスマートコミュニティのデザイン トップマネジメントのためのみちのくEMS規格改定セミナー 2016/10/12 - More details Close エネルギーマネジメントから新たな価値を引き出す技 日本技術士会東北支部技術情報部会研修会 2016/09/02 - More details Close エネルギーから地域を変えるスマートコミュニティのデザイン 東北ニュービジネス協議会福島支部第40回会員交流会 2016/07/28 - More details Close 講演：エネルギーから地域を変えるスマートコミュニティのデザイン 東北エネルギー懇談会 2016/07/19 - More details Close 釜石市の商工会会員を対象として、「スマートエネルギーシステムの地域デザイン」につして講義した。 第49回原産年次大会 2016/04/13 - More details Close この国の未来とエネルギー問題、パネリスト 森・川・海の再生可能エネルギープロジェクト推進セミナー 2016/02/23 - More details Close 地域に展開するエネルギービジネスと共有価値 みやぎ工業会第54回新春産学官交流大会 2016/01/22 - More details Close 地域に展開するエネルギービジネスと共有価値 平成28年東北データベースソサエティ新春講演会 2016/01/15 - More details Close 地域エネルギーシステムをつくる、水素社会の前に必要なことは 青森県三八地域県民局事業分散型エネルギーフォーラム 2015/12/10 - More details Close 地域に存在するバイオマス資源の最大利用 仙台市せんだい豊齢学園 2015/12/07 - More details Close 講師として、「資源の重要性と再生可能エネルギーの可能性と課題」について授業した。 水素エネルギーの利活用に関する勉強会 2015/08/18 - More details Close 水素エネルギーの概要を、山形県管児湯エネルギー部環境規企画課の依頼に応じて講演した。会場は、山形県庁講堂。 みやぎ工業会第21回MIA倶楽部 2015/07/21 - More details Close 東北に水素社会を創るために スマートコミュニティ実現支援フォーラム in 仙台 ～東北の未来に向けたまちづくり～ 2015/03/17 - More details Close 基調講演 「東北地域にスマートコミュニティをつくる」 ～地域熱需要の分散を考慮したエネルギーシステムのデザイン～ 地球温暖化対策を考えるシンポジウム in 山形・最上町 2015/03/14 - More details Close 講演「地域のエネルギーシステムをつくる」 環境と地域の持ち味から 「気仙の明日」を考えるシンポジウム 2015/03/01 - More details Close 海と山と人をつなぐ地域再生可能エネルギーシステム・大船渡プロジェクト 気仙両市で、復興推進委メンバーが視察 事業展開の歩み確認 2014/10/13 - More details Close 復興庁の復興推進委員会（委員長・伊藤元重東京大学大学院経済学研究科、経済学部教授）による視察は１日、気仙両市で行われた。東日本大震災を乗り越え、新たな事業展開に取り組む民間企業などを回り、復興への歩みや課題に理解を深めた。同委員会は15人で構成。同日の視察には岩渕明委員（岩手大学工学部教授）、中田俊彦委員（東北大学大学院工学研究科教授）、松原隆一郎委員（東京大学大学院総合文化研究科教授）が参加した。 都市プログラム・環境創成プログラム合同セミナー 2014/02/28 - More details Close 自律・分散型エネルギーシステムの地域デザイン 地球温暖化防止活動推進員研修セミナー 2014/02/26 - More details Close エネルギー自立・分散型社会に向けて 循環・代謝型社会システム研究会 2014/02/24 - More details Close 地域特性を考慮した再生可能エネルギー利活用システム 青空カフェ 2014/02/08 - More details Close エネルギーの現状とこれからの再生可能エネルギーについて 宮古市公開シンポジウム 2014/02/02 - More details Close 森・川・海の再生可能エネルギーシンポジウム 仙台市立榴岡小学校区社会学級 2014/01/30 - More details Close 仙台市環境出前講座、低炭素社会って何だろう！これからの暮らしとエネルギー 弘前型スマートアカデミー 2013/11/26 - More details Close スマートシティについての授業。 仙台市立北中山小学校区社会学級 2013/10/23 - More details Close 仙台市環境出前講座、低炭素社会って何だろう！これからの暮らしとエネルギー 地域での地球温暖化防止活動基盤形成事業第2回地域センター従事者研修基調講演 2013/10/23 - More details Close 地域実践活動研修 東北地方将来エネルギーフォーラム2013 2013/10/06 - More details Close 第二部調査研究報告「自律・分散型エネルギー社会の地域デザイン」と第三部パネル討論 東北活性化研究センター ユニバーサイエンス 2013/08/06 - More details Close 酒田南高校での授業 みやぎ生協学習講演会 2013/06/24 - More details Close くらしの中のエネルギーを考えよう 日経スマートシティシンポジウム 2013/03/08 - More details Close スマートシティ創造で実現する都市・地域の活性化と被災地復興「東北地方の復興とスマートシティ実現」 日経スマートシティシンポジウム 2012/12/15 - More details Close スマートシティ創造で実現する都市・地域の活性化と被災地復興「東北地方の復興とスマートシティ実現」 SR基礎ゼミ 2012/11/13 - More details Close 仙台二華高にて、１年生「総合的な学習の時間」としで実施した「ＳＲ基礎ゼミ（サイエンティフィックリサーチの授業を担当し、低炭素社会に関する指導を行った。 東北地方将来エネルギーフォーラム2012 2012/10/27 - More details Close 調査研究報告「「海外も含めたエネルギーシステムの動向」 仙台市社会学級研究会、青葉区 2012/10/03 - More details Close 仙台市環境出前講座、低炭素社会って何だろう！これからの暮らしとエネルギー 学習講演会 2012/09/26 - More details Close 市民向き講演会、大河原駅前コミセン 学習講演会 2012/09/04 - More details Close 市民向き講演会、大崎市民会館 仙台スマート勉強会 2012/08/23 - More details Close 地域スマートエネルギーシステム設計 東北活性化研究センター ユニバーサイエンス 2012/08/22 - More details Close 岩手県立葛巻高校での授業 学習講演会 2012/08/08 - More details Close 市民向き講演会、エルパーク仙台 東北エネルギー懇談会 2012/07/24 - More details Close 再生可能エネルギー 宮城県立泉館山高校出張講義 2012/04/27 - More details Close 二年生を対象として、授業を行った。 仙台第二高等学校一日大学 2011/12/08 - More details Close 一年先生を対象として、授業を行った。 宮古地区エネルギー懇談会記念講演 2011/11/23 - More details Close エネルギーシステムの地域デザイン 多摩高校キャリア講演会 2010/10/21 - More details Close 地域に根差した低炭素社会のかたち 高崎高校出前講義 2010/10/15 - More details Close 地域に根差した低炭素社会のかたち 再生エネルギー、事業化後押し／専門家会議を設置／東北経産局 2010/07/28 - More details Close 東北経済産業局は、バイオマス（生物資源）などの再生可能エネルギーを活用した電気・熱供給や燃料製造の事業化を促そうと、専門家でつくるアドバイザリーボードを設置し２６日、仙台市で第１回会合を開いた。東北の市町村が策定した新エネルギービジョンの進行状況を調査し、事業実現に向けた方策を検討する。 ボードは委員長の中田俊彦東北大大学院教授ら学識者や金融関係者ら５人で構成し、３年計画で活動する。新エネビジョンを策定している東北の約９０の市町村にアンケートを行うなどして、事業化の可能性がある案件を抽出。国の資金活用や広域連携など、事業化に向けてどんな方法がいいのかを検討し、提言する。 東北で環境ビジネスにかかわる約１０００の企業や研究機関などを対象に、ニーズや技術シーズ（種）に関するアンケートも実施。ニーズとシーズのマッチングの可能性を探る。 秋田地区エネルギー懇談会記念講演 2010/06/02 - More details Close スマートエネルギーシステムの地域デザイン 宮城県立泉高校進路講演会 2010/05/27 - More details Close エネルギーと社会 COP15参加報告会・国際交渉シンポジウム 2010/03/08 - More details Close COP15に参加した専門家による参加報告と問題提議 仙台第二高等学校一日大学 2009/12/03 - More details Close 一年先生を対象として、授業を行った。 白石エネルギーを共に考える会 2009/10/27 - More details Close 低炭素社会に向けた暮らしのかたち 新エネルギーのビジョンを検討／登米市策定委初会合 2009/08/01 - More details Close 地球温暖化対策として環境に配慮した新エネルギーを導入しようと、登米市の市地域新エネルギービジョン策定委員会の初会合が７月２９日、市南方庁舎で開かれた。市は、策定委の検討結果を踏まえ、どの新エネルギーを市内に導入すべきかを示すビジョンを年度内に策定する。 委員として学識経験者ら９人が出席した。委員長に東北大大学院文学研究科の長谷川公一教授、副委員長に東北大大学院工学研究科の中田俊彦教授を選んだ。策定委は今後、太陽光や風力、水力、バイオマスなど二酸化炭素の排出量を抑えられる発電方法のうち、どのエネルギーの導入が市にふさわしいかを議論する。 市は今月、市民５００人を対象に自然エネルギーをめぐるアンケートを実施する。 市は３月、市内の二酸化炭素排出量の削減目標を定めた「市地球温暖化対策地域推進計画」を作り、さまざまな排出削減策を検討している。 杜の都まちづくり広場2009ワークショップ 2009/02/25 - More details Close 仙台における再生エネルギー利用の可能性 機械系オープン講義、横手清陵学院高校 2009/02/24 - More details Close 2050年のエネルギー社会を創る NHKスペシャル 2008/12 - More details Close NHKスペシャルにて企画中の、南アフリカのエネルギー・資源問題番組の企画、取材に協力を求められたので、それに応じた。 環境講演会2008 2008/11/02 - More details Close みんなで広げよう！ グリーンエネルギーの輪 温暖化防止と新エネルギー 尾鮫小学校 2008/10/29 - More details Close 青森県六ヶ所村尾鮫小学校6年生 日本技術士会東北支部技術情報部会研修会 2008/03/07 - More details Close エネルギーから見た地域バイオマス利用の今後の展望 東京ガス技術研究所技術講演会 2008/02/26 - More details Close バイオマス利用技術の最新状況 機械系オープン講義、横手清陵学院高校 2008/02/22 - More details Close 2050年のエネルギー社会を創る 環境月間記念講演会 2007/06/26 - More details Close 東北電力女川原子力発電所にて、「エネルギーと環境」について講演。 Our life and the global environment Eco life talk 2007/06/10 - More details Close 暮らしの中の環境を考えるをテーマにした市民向け啓発事業に、学識経験者として話題提供 宮城・大和町のエコファクトリー計画／環境保全協定締結／企業など 2006/10/31 - More details Close 大和町が仙台北部中核工業団地に計画している環境リサイクル産業団地「エコファクトリー」で、進出企業３社の稼働状況などを監視する運営評議会（委員長・中田俊彦東北大教授）と町、進出企業の３者は３０日までに環境保全協定を結んだ。 協定は騒音や振動について、県公害防止条例よりも厳しい規制値を適用する。各工場の雨水ますから定期的に取水し、カドミウムなど有害物質の値を分析して公表。廃棄物処理法の水質基準より厳しい規制値を用いて監視するという。 町は協定締結に先立ち、計画に反対する地元住民の理解を得ようと説明会を開き、住民側の要望を協定に取り入れるなどしたが、反対意見は根強く、住民側の理解は得られなかった。工場は１１月から順次稼働する。 宮城・大和町のエコファクトリー計画／環境保全協定締結へ／町など３者間 高い安全性アピール 2006/08/25 - More details Close 大和町が仙台北部中核工業団地に計画している環境リサイクル産業団地「エコファクトリー」について、進出する産廃中間処理会社３社の稼働状況などを監視する運営評議会（委員長・中田俊彦東北大教授）は２４日、大和町の吉岡コミュニティセンターで会合を開き、町と評議会、進出企業の３者で近く環境保全協定を結ぶことを決めた。 米沢興譲館高校、大学講座講師 2006/06/23 - More details Close 高校生を対象として模擬授業を行う。 東北農政局地域バイオマス利活用推進連絡会議 2006/05/30 - More details Close 招待講演「バイオマスエネルギーを巡る現状と課題」 NHK環境フォーラム in 遠野 2006/03/21 - More details Close パネルディスカッション 仙台市建設事業者のための環境セミナー 2006/01/19 - More details Close 環境に関する講演やみちのくEMSの概要を紹介することにより，事業者の経営における環境配慮活動を促進するとともに，こうした活動を促進するツールとしてのみちのくEMSの普及を図る。 エネルギー・資源学会東北地区特別講演会 2005/11/08 - More details Close 企画、総合司会及び進行 大和町環境シンポジューム「循環型まちづくりへの提言」 2005/09/13 - More details Close 循環型まちづくりへの提言と題して、コーディネータ。 What is the Environment in our life? Eco life talk 2005/06/18 - More details Close 暮らしの中の環境を考えるをテーマにした市民向け啓発事業に、学識経験者として話題提供 NPO法人東北環境会議所循環型社会形成特別講演会 2005/05/20 - More details Close 循環型社会形成のためのバイオマス利活用方策の話題提供 宮城県公聴イベント「県環境基本計画策定」古川 2005/03/17 - More details Close 環境地域懇話会 みやぎの環境を考える 宮城県公聴イベント「県環境基本計画策定」仙台 2005/02/23 - More details Close 現役大学生によるみやぎの環境を考える会 福島県中小企業団体連合会会津アピオ美化啓発セミナー「環境問題への企業の取り組みを考える」 2005/02/10 - More details Close 環境問題への企業の取り組みの実践事例とコンセプトを紹介。 環境ビジネススクール「地域における環境ビジネスの構築」 2005/01/24 - More details Close 地域における環境ビジネスの構築についての話題提供 Energy-Economic Modeling and the Environment 2005/01/12 - More details Close Elsevier Ltd. And Tohoku University, Japan (Toshihiko Nakata, „ENERGY-ECONOMIC MODELS AND THE ENVIRONMENT,‰ March 8, 2004) published this report as a review of the various issues associated with the energy-economic model and its application to national energy policies, renewable energy systems, and the global environment. According to Nakata, „In finding suitable energy-economic models for specific purposes, it is important to apply an adequate tool to consider geographical regions in focus, time horizon, energy classification, and economic parameters; only then we can access the required data for running the model and its availability.‰ The paper details several available energy economic models, applications to local and national energy systems, and climate policy assessment. 経済産業省環境ビジネス人材セミナー「地域エネルギーシステムを創る」 2004/12/02 - More details Close 地域エネルギーシステムを通した循環型社会形成の方策提案 宮城県公聴イベント「県環境基本計画策定」白石 2004/11/28 - More details Close 環境地域懇話会 みやぎの環境を考える 六ヶ所地域活性化支援調査事業講演会「地域のエネルギーシステムを創る」 2004/10/20 - More details Close 地域のエネルギーシステムについての提案と実践方策の話題提供 第13回INS公開講演会 2004/08/28 - More details Close 地域のエネルギーシステムを創る 仙台市環境シンポジウム「環境マネジメントの新潮流」 2004/05/28 - More details Close 環境マネジメントの新潮流についての話題提供とディスカッション 廃プラスチック利用による地域興し研究会 2004/04/19 - More details Close エネルギー経済モデル 経済産業省東北地域MOTシンポジウム「環境ビジネスプログラム」 2004/02/07 - More details Close 環境ビジネスプログラムの研究成果発表とディスカッション 東北経済連合会環境エネルギー調査ミッション参加者研修会 2002/07/25 - More details Close 環境エネルギー調査ミッション参加者のための事前研修会 京都大学エネルギー社会システム計画研究談話会「エネルギー経済モデルから見る電力自由化とエネルギー戦略」 2001/02/02 - More details Close エネルギー経済モデルから見る電力自由化とエネルギー戦略についての話題提供 Show all Show first 5 Media Coverage 54 Cultivate human resources who see decarbonization in the energy system and are trained not only in the left brain but also in the right brain. Coalition of Universities and Other Institutions Contributing to Achieving Carbon Neutrality　Regional Zero Carbon Working Group　Interview Series 2023/12/19 Type: Internet The Future of Miyako City Myself Miyako City　Public Relations Miyako　Toward the Realization of a Decarbonized Society 2023/01 Type: Promotional material Professor Toshihiko Nakata (Department of Managemenst Science and Technology) attends the awarding ceremony for the &＃34;Ministry of the Environment&＃39;s Leading Decarbonization Regions&＃34; selection. Tohoku University　Website　Graduate School of Engineering News 2022/12/23 Type: Internet More details Close The project &＃34;Creating a decarbonized region in a widely merged city: Aiming to expand the virtuous circle of the local economy starting with Miyako City&＃39;s version of Stadtberke&＃34; in which Professor Toshihiko Nakata (Department of Technology and Social Systems) participates, was selected as the 2nd decarbonized leading region by the Ministry of Environment, and a certificate award ceremony was held on December 20, 2022. The certificate award ceremony was held on December 20, 2022. The ceremony was held in the presence of Akihiro Nishimura, Minister of the Environment, and Miki Yamada, Vice Minister of the Ministry of the Environment, and certificates were awarded to the selected local governments. Tohoku University will analyze the decarbonization effects of the introduction of renewable energy based on energy supply and demand data, rooted in its experience with the Smart Community Project after the earthquake, and will participate in the creation of a mechanism to encourage citizens to change their behavior. Tohoku Energy Now (Middle): Wind Power Plans Underway in Akita and Aomori Nihon Keizai Shimbun, Inc.　Nihon Keizai Shimbun 2022/12/15 Type: Newspaper, magazine More details Close Of the top 10 prefectures in Japan in terms of wind power generation by prefecture, Tohoku accounts for four of them. As more and more projects are being planned across the country and facilities are becoming larger and larger, Professor Toshihiko Nakata of Tohoku University&＃39;s Graduate School of Regional Energy Systems says, &＃34;It is necessary for local residents to improve their knowledge when negotiating with companies outside the Tohoku region that are planning to build wind turbines. Careful consensus-building required, challenges in environmental assessment, wind power generation plans being withdrawn one after another. Fukushima Minpo News　Fukushima Minpo Co. Ltd.　Front page 2022/09/24 Type: Newspaper, magazine Exploring the Utilization of Tohoku&＃39;s Resources KAHOKU SHIMPO PUBLISHING CO.　KAHOKU SHIMPO 2022/09/06 Type: Newspaper, magazine Unique decarbonization analysis tool released The Japan Electric Association　The Denki Shinbun 2022/08/24 Type: Newspaper, magazine More details Close Research Group of Professor Nakata, Graduate School of Tohoku University Visualization of supply-demand structure from numerical statistics Only two months from the announcement of the &＃34;wind power generation project&＃34; to the withdrawal of the project, in response to strong opposition from residents and the government. Sendai Television Incorporated　News 2022/08/17 Type: TV or radio program More details Close Under the current assessment system, the project owner has to draw up a certain amount of plans before they can be submitted. Residents have the impression that there is no point in saying anything. If they change the plan, they may be confronted with the possibility that it was a lousy plan. I think it is essential to set up a forum where people can discuss in advance what kind of project would allow for a soft landing and what kind of advantages it would have. Professor Nakata believes that this case is a manifestation of the problems with Japan&＃39;s environmental assessment process. Carbon neutrality and new lifestyles Fukushima City Consumer Group Conference　Life News Fukushima 2022/05/26 Type: Promotional material Social Innovation & Inclusion Myself FM Sendai　Datafm SDGs Special Week Day4　Morning Brush 2022/04/21 Type: TV or radio program More details Close This presentation will introduce &＃34;Social Innovation & Inclusion,&＃34; one of the three pillars of Tohoku University&＃39;s Green Future Creation Organization. The Reality of Decarbonization The Japan Electric Association　The Denki Shinbun　Front page 2022/01/19 Type: Newspaper, magazine The Reality of Decarbonization Myself Japan Electric Association　The Denki Shimbun　Front page 2022/01/13 Type: Newspaper, magazine Fukushima Innovation Coast Initiative Symposium&＃34; was held. Fukushima Prefecture　Fukushima Revitalization Station 2021/12/13 Type: Internet More details Close On Saturday, December 11, 2021, the 6th Fukushima Innovation Coast Initiative Symposium was held at Linkuru Okuma, an exchange facility in Okuma Town. On Saturday, December 11, 2021, the &＃34;6th Fukushima Innovation Coast Initiative Symposium&＃34; was held at &＃34;Linkuru Okuma&＃34;, an exchange facility in Okuma Town. It has been almost 11 years since the Great East Japan Earthquake and the nuclear disaster. The mission of the Fukushima Innovation Coast Initiative is to restore the lost industries in the Hamadori area. In this symposium, we will discuss The theme of the symposium was &＃34;Sustainable Challenges through the INNOVATION Initiative: Towards a Green Society. In this symposium, under the theme of &＃34;Towards a Green Society,&＃34; we disseminated information on our efforts and achievements in developing a new industrial infrastructure and discussed the future progress of the initiative together with everyone. Symposium in Okuma Town, Fukushima, to Present Research Results to Promote Inove Initiative FUKUSHIMA-MINPO CO., LTD.　FUKUSHIMA-MINPO 2021/12/12 Type: Newspaper, magazine More details Close On March 11, a symposium to promote the Fukushima International Research and Industrial City (Innovation Coast) concept was held at Linkuru Okuma in Okuma Town, Fukushima Prefecture. The symposium was hosted by the Fukushima Innovation Coast Initiative Promotion Organization. The symposium was hosted by the Fukushima Innovation Coast Initiative Promotion Organization. The event was sponsored by the Fukushima Innovation Coast Initiative Promotion Organization and co-sponsored by the prefectural government, the Reconstruction Agency, and the Ministry of Economy, Trade & Industry. Professor Toshihiko Nakata of Tohoku University&＃39;s Graduate School of Engineering, Department of Management Science and Technology delivered a keynote speech on the theme of &＃34;Designing Local Energy Systems. Professor Nakata talked about the advanced efforts being made in Hamadori to introduce renewable energy and how they should be developed in the future. Keynote Speeches and Panel Discussions in Fukushima City to Promote a Decarbonized Society FUKUSHIMA MINYU SHIMBUN　FUKUSHIMA MINYU SHIMBUN 2021/06/30 Type: Newspaper, magazine More details Close The event was attended by about 100 people, including citizens and businesses. Professor Toshihiko Nakata of Tohoku University&＃39;s Graduate School of Engineering gave a keynote speech, pointing out that the introduction of renewable energy such as wind power is necessary to realize the decarbonized society set forth by the government and the city. He went on to say that it is important to find ways to develop energy businesses while taking into account the characteristics of the prefecture. Zero CO2 Emissions by 2040: Okuma Town&＃39;s &＃34;Zero Carbon Vision&＃34; Formulated KAHOKU SHIMPO PUBLISHING CO.　Kahoku Shimpo 2021/02/22 Type: Newspaper, magazine Okuma Town to achieve zero carbon dioxide by 2040 Fukushima Broadcasting Co.,Ltd.　News 2021/02/19 Type: TV or radio program More details Close The town of Okuma has formulated a vision for realizing its &＃34;Zero Carbon Declaration,&＃34; which aims to achieve virtually zero carbon dioxide emissions, and announced it on April 18. On the 18th, Toshihiko Nakata, a professor at Tohoku University&＃39;s Faculty of Engineering, and Jun Yoshida, mayor of the town, who were involved in the formulation of the vision, held a press conference at the town hall. The town, which was evacuated due to the accident at the Fukushima Daiichi Nuclear Power Plant of the Tokyo Electric Power Company, expressed its determination to become a sustainable town that does not depend on nuclear power plants or fossil energy. Okuma town Carbon zero vision toward 2050 Fukushima Minpo Co.　Fukushima Minpo 2021/02/19 Type: Newspaper, magazine 福島市にごみ減量化など答申 福島民友新聞社　福島民友 2020/11 Type: Newspaper, magazine 環境、脱炭素で答申、福島市の審議会 福島民報社　福島民報 2020/11 Type: Newspaper, magazine Government committee visits Sendai Airport, Higashi Matsushima, etc. for infrastructure reconstruction KAHOKU SHIMPO PUBLISHING CO.　KAHOKU SHIMPO PUBLISHING CO. 2017/09/29 Type: Newspaper, magazine More details Close Government committee visits Sendai Airport, Higashi Matsushima, etc. for infrastructure reconstruction Aomori Prefecture&＃39;s Energy Industry Strategy: Full of Dreams, But Questions Abound KAHOKU SHIMPO PUBLISHING CO.　KAHOKU SHIMPO 2016/07/15 Type: Newspaper, magazine More details Close Toshihiko Nakata, a professor at Tohoku University&＃39;s graduate school, said, &＃34;Employment in related businesses is a desperate idea. We should think from the demand side. Smart Energy and Community Development The NIKKAN KENSETSU-KOGYO SHIMBUN,LTD.　The Daily Engineering & Construction News 2016/06/13 Type: Newspaper, magazine More details Close A management engineering perspective on smart energy systems. Effective use of waste heat to reduce power generation costs. Creating a system that is viable as a business. Annual Meeting of Japan Atomic Energy Industries Concludes - Experts Discuss New Value of Nuclear Energy Japan Electric Association Newspaper Department　The Denki Shimbun 2016/04/14 Type: Newspaper, magazine More details Close The 49th Annual Meeting of the Japan Atomic Energy Industries Association (JAIA) closed on March 13. On the same day, Masahiro Sakane, Senior Advisor of Komatsu Ltd. delivered a keynote speech on the theme of &＃34;Energy Policy and Global Warming Issues in this Country. Nobuo Tanaka, chairman of the Sasakawa Peace Foundation, Keigo Akimoto, chief researcher and leader of the Systems Research Group at the Research Institute of Innovative Technology for the Earth (RITE), and Toshihiko Nakata, professor at Tohoku University&＃39;s graduate school, led a panel discussion on the theme of &＃34;The future of this country and energy issues. Liberalization of Electricity: The Future of Competition in Tohoku / (2) Collapse of Monopoly KAHOKU SHIMPO PUBLISHING CO.　KAHOKU SHIMPO 2016/03/24 Type: Newspaper, magazine More details Close Toshihiko Nakata, a professor of energy economics at Tohoku University&＃39;s Graduate School of Engineering, said, &＃34;Liberalization is a chance for the private sector to spread its wings, but it also calls into question why we have to run nuclear power plants. Post-Fukushima Future THE MAINICHI NEWSPAPERS　Mainichi Shimbun Weekly Economist 2016/03/15 Type: Newspaper, magazine More details Close Japan is throwing away 25 trillion yen of heat. Learn from Europe for a system that fits your region. Close-up: Community and energy, distributed energy systems that utilize heat, and unique models that match regional characteristics. Gas Energy News Co.　Gas Energy News 2015/12/07 Type: Newspaper, magazine 次世代技術 一堂に／仙台／再生エネなど展示／再生可能エネルギーや情報通信など次世代の技術を紹介する「スマートコミュニティ東北」 河北新報社　河北新報 2015/11/13 Type: Newspaper, magazine More details Close 研究者らの講演もあり、東北大大学院工学研究科の中田俊彦教授がＩｏＴを使った東北のエネルギーシステムについて「東京中心ではなく、地域の実情に根差したシステムでなければ成功しない」と強調した。 水素エネルギーって何？ ＮＨＫテレビ 2015/08/18 Type: TV or radio program More details Close 環境に優しい次世代のエネルギーとして注目を集めている「水素エネルギー」の普及につなげようと、企業の担当者などを集めた勉強会が県庁で開かれました。 この勉強会は「水素エネルギー」について理解を深めてもらおうと県が初めて開いたもので電力やガス、それに自動車関連企業の担当者ら１４０人あまりが参加しました。 「水素エネルギー」をめぐっては国が去年６月、二酸化炭素を排出しない燃料電池車の普及などを盛り込んだロードマップを策定していますが、県内ではまだ水素エネルギーを活用した事業はありません。 勉強会では東北大学大学院の中田俊彦 教授が、水素エネルギーの導入について、「人口密度の高い都会と比べると、東北地方はエネルギーの需要が低い傾向にあり、国のやり方をまねするだけでは、採算がとれない」と指摘しました。 そのうえで中田教授は、最上町で木質バイオマスエネルギーを活用している事例をあげて「水素エネルギーをいき 東北でスマコミ実現 日刊工業新聞 2015/03/18 Type: Newspaper, magazine More details Close 基調講演「東北地域にスマートコミュニティをつくる」の紹介 温暖化対策、地方から提言を 最上でシンポ、再生エネの可能性考える 山形新聞 2015/03/15 Type: Newspaper, magazine More details Close 東北大大学院の中田俊彦教授が基調講演。 エネルギーの使い方を考える ＮＨＫテレビ 2014/02/08 Type: TV or radio program More details Close 震災を機にエネルギーの使い方について考えようという講演会が、８日、気仙沼市で開かれました。講演会は、気仙沼市の集会所で開かれ、地域の住民などおよそ６０人が集まりました。講演会では東北大学大学院の中田俊彦教授が、震災が起きた時に電気やガス、ガソリンなどのエネルギーの供給が制限を受けた経験を踏まえ、これからの暮らしの中でエネルギーをどう使っていくべきなのか説明しました。海外の事例として、オーストリアでは日本よりも森林面積が少ないにもかかわらず、木材を利用したエネルギーが効率的に使われていることなどを紹介しました。講演会に参加した気仙沼市の２０代の女性は「どのエネルギーを使うかということについては考えたことがなかったので、すごく参考になりました」と話していました。講演をした中田俊彦教授は「これからは１０年とか３０年といった長期的な視点でエネルギーの使い方を考えて、地域作りを進めていくことが大切で エネ自給実現へ市民と機運醸成 岩手日報 2014/02/03 Type: Newspaper, magazine More details Close 宮古市スマートコミュニティ推進協議会（会長、中田俊彦）が主催する再生可能エネルギーシンポジウムが開催された。 仙台放送スーパーニュース 仙台放送 2013/11/01 Type: TV or radio program More details Close 暖房時の室温20℃設定で心地よく過ごすことのできるライフスタイル「WARM BIZ（ウォームビズ）の紹介番組に、中田が録画にて出演して、その効果を解説しました。 小水力を活用し、再生エネルギー推進へ／宮古市、協議会設立 河北新報　河北新報社 2013/07/24 Type: Newspaper, magazine More details Close 設立総会には、宮古市、ＮＴＴデータ、日本国土開発や地元企業など２２団体の関係者が出席。会長に、東北大大学院工学研究科の中田俊彦教授を選んだ。山本正徳市長は「地元の産業振興、雇用拡大につながる」と期待した。 東日本大震災／太陽光生かしたまちづくり始動／宮城・山元町 河北新報社　河北新報 2012/06/22 Type: Newspaper, magazine More details Close 再生可能エネルギーを活用したまちづくりを目指す宮城県山元町の「コンパクトシティー型スマートコミュニティー事業」が２１日、本格的に始動した。キックオフ会議（座長・中田俊彦東北大大学院教授）が町中央公民館で開かれ、太陽光発電装置の導入などを柱とする事業概要を委員に説明した。 委員は学識経験者や町関係機関代表ら７人で構成。事業者の町とＮＴＴ東日本などを含め３０人が会議に出席した。 宮古市：再生エネ産官学連携 事業化に向け検討会設立 毎日新聞 2012/05/19 Type: Newspaper, magazine More details Close 検討会には市やエヌ・ティ・ティ・データ、帝人、日本国土開発などの企業、東北大の１６団体が参加。太陽光をはじめ林野資源を活用したバイオマス発電、小水力発電などの可能性を調査する。東日本大震災で東北電力からの電気供給がたたれた苦い経験から災害に備えた独自のエネルギー確保の狙いもある。 自然のチカラを探る!みちのくエネルギーWatching ミヤギテレビ 2011/12/17 Type: TV or radio program More details Close 東北にゆかりのあるタレント、ダニエル・カールと佐藤唯さんが、東北でも意外なところで利用されている&＃34;再生可能エネルギー&＃34;をご紹介!そして、エネルギーのスペシャリスト・東北大学教授の中田俊彦先生が、今後、東北にはどんなエネルギーが必要なのか? また、再生可能エネルギーのポイントを教えて頂きます。 お話はなんと、東北を飛び越えて日本のエネルギーの未来まで!? news every ミヤギテレビ 2011/12/15 Type: TV or radio program 再生エネルギー、事業化後押し／専門家会議を設置／東北経産局 河北新報社　河北新報 2010/07/28 Type: Newspaper, magazine More details Close ボードは委員長の中田俊彦東北大大学院教授ら学識者や金融関係者ら５人で構成し、３年計画で活動する。新エネビジョンを策定している東北の約９０の市町村にアンケートを行うなどして、事業化の可能性がある案件を抽出。国の資金活用や広域連携など、事業化に向けてどんな方法がいいのかを検討し、提言する。 新エネルギーのビジョンを検討／登米市策定委初会合 河北新報社　河北新報 2009/08/01 Type: Newspaper, magazine More details Close 委員として学識経験者ら９人が出席した。委員長に東北大大学院文学研究科の長谷川公一教授、副委員長に東北大大学院工学研究科の中田俊彦教授を選んだ。策定委は今後、太陽光や風力、水力、バイオマスなど二酸化炭素の排出量を抑えられる発電方法のうち、どのエネルギーの導入が市にふさわしいかを議論する。 東北大生が模擬授業 東奥日報 2008/10/30 Type: Newspaper, magazine More details Close 東北大学工学研究科の学生らが、六ヶ所村の尾鮫小学校を訪れ、自然エネルギーをテーマに模擬授業した。 貧困・紛争の解決策探る／東北大と国連大セミナー 2008/04/17 Type: Newspaper, magazine More details Close 研究成果の紹介で、エネルギー問題に取り組む東北大大学院工学研究科の中田俊彦教授は「エネルギーの安定供給があるかないかで、住民の教育や所得に影響が出る。発展途上国の人が、まきなど原始的燃料を使わなくても済む方法を考える必要がある」と強調した。 Study in the effective use of energy in the offing Human Sciences Research Council, South Africa 2007/04 Type: Newspaper, magazine More details Close 本学アフリカプログラムによる共同研究開始の紹介記事。 宮城・大和町のエコファクトリー計画／環境保全協定締結／企業など 河北新報社　河北新報 2006/10/31 Type: Newspaper, magazine More details Close 大和町が仙台北部中核工業団地に計画している環境リサイクル産業団地「エコファクトリー」で、進出企業３社の稼働状況などを監視する運営評議会（委員長・中田俊彦東北大教授）と町、進出企業の３者は３０日までに環境保全協定を結んだ。 宮城・大和町のエコファクトリー計画／環境保全協定締結へ／町など３者間高い安全性アピール 河北新報社　河北新報 2006/08/25 Type: Newspaper, magazine More details Close 大和町が仙台北部中核工業団地に計画している環境リサイクル産業団地「エコファクトリー」について、進出する産廃中間処理会社３社の稼働状況などを監視する運営評議会（委員長・中田俊彦東北大教授）は２４日、大和町の吉岡コミュニティセンターで会合を開き、町と評議会、進出企業の３者で近く環境保全協定を結ぶことを決めた。 Eco-life from the community - Environmental Forum IN Tono NHK　NHK Saturday Forum　June 10, 2006 (Tue) 11:30 pm 〜〜 June 11, 2006 (Sun) 00:40 AM 2006/06/10 Type: TV or radio program More details Close Environmental issues have been said to be a drag on industry. However, with the Kyoto Protocol now in effect, there is an urgent need to create an environmentally friendly society. Examples from various parts of Tohoku will be shown and discussed. Professor of Tohoku University Graduate School ... Toshihiko Nakata, Singer/Essayist ... Agnes Chan, Representative of NPO Mori to Kaze no Gakko ... Nobuo Yoshinari, Mayor of Tono ... Toshiaki Honda Moderator] Science Journalist...Goro Koide -Recorded at Aeria Tono Exchange Center, Tono City, Iwate Prefecture NHKニュース NHK 2006/05/26 Type: TV or radio program More details Close バイオマス利活用推進会議での講演の模様が、ニュース番組にて取り上げられた。 東北電力環境行動レポート 東北電力 2005/08 Type: Newspaper, magazine More details Close 社外有識者による第三者意見書 CO2の削減を／仙台国際センターでＥＣＯライフトーク 河北新報社　河北新報 2005/06/19 Type: Newspaper, magazine More details Close トークセッションでは、歌手ＥＰＯさんと東北大大学院工学研究科助教授の中田俊彦さん、宮城大特任助教授のアン・マクドナルドさんがパネリストを務め、地球温暖化の原因とされる二酸化炭素（ＣＯ２）の排出量を減らすためのアイデアなどを紹介。マクドナルドさんは「生産地から食卓までの距離が近い食料を消費することは、二酸化炭素排出量の削減につながる」と地産地消を勧めた。 ヘッドラインレビュー「環境・安全」 技術総合誌ＯＨＭ 2005/02/05 Type: Newspaper, magazine More details Close 雑誌ＯＨＭのヘッドラインレビューに、環境・安全分野の研究内容として、紹介された。 Energy for the future UC Berkeley Groks 2003/12/25 Type: TV or radio program More details Close カリフォルニア大学バークレー校のインタビュー形式のラジオ放送番組に出演して、科学者として将来のエネルギー利用についての見識を発表。 With Sun on Roof, More Yen in the Pocket The New York Times　The New York Times　The New York Times 2003/07/29 Type: Newspaper, magazine More details Close &＃39;&＃39;Japan&＃39;s energy policy is now at a turning point,&＃39;&＃39; said Toshihiko Nakata, a professor of science and technology management at Tohoku University. &＃39;&＃39;If there are no subsidies, consumers won&＃39;t buy solar panels. And as the government deregulates the utilities, electricity prices will come down, so it will take longer for consumers to recoup the cost of installing the panels.&＃39;&＃39; 都市環境の向上へ、重要度増すエネルギー対策 日刊建設工業新聞 2003/06/26 Type: Newspaper, magazine Show all Show first 5 Academic Activities 15 Co-Guest Editor of Special Issue &＃34;Sustainable Energy Systems: Efficiency and Optimization&＃34; 2020/04/01 - Present Activity type: Scientific advice/Review Fellow 2020/02 - Present Activity type: Academic society, research group, etc. Guest Editor of Special Issue Guest Editor of Special Issue &＃34;Offshore Wind Energy Technology and System Integration&＃34; 2019/04/01 - Present Activity type: Scientific advice/Review Section Board Member of Energies 2019/04/01 - Present Activity type: Scientific advice/Review Editorial Board Member, Clean Technologies and Environmental Policy 2016/04 - Present More details Close Focusing on Technology Research, Innovation, Demonstration, Insights and Policy Issues for Sustainable Technologies Member, Planning committee 2012/07 - Present Activity type: Academic society, research group, etc. Advisory Board Member of Challenges 2000/06/01 - Present Activity type: Scientific advice/Review C8 Energy Efficiency 3 2022/08/02 - 2022/08/02 Activity type: Competition, symposium, etc. Chair, Recycle Technology Committee 2018/04 - 2022/03 Activity type: Academic society, research group, etc. Technology development and social implementation toward sustainable society 2021/09/07 - 2021/09/07 Activity type: Competition, symposium, etc. The 40th Annual Meeting of the Japan Society of Energy and Resources 2021/08/02 - 2021/08/03 Activity type: Academic society, research group, etc. Director, Technology and Society Division 2020/04 - 2021/03 Activity type: Academic society, research group, etc. Chair, Biomass directory 2019/04 - 2021/03 Activity type: Academic society, research group, etc. Energy and air pollution Fukushima University 2019/09/27 - 2019/09/29 Activity type: Competition, symposium, etc. A-TS 08-09 Study Group on Energy System Design for a Low Carbon Society Tokyo 2010/04/01 - 2016/03/31 Activity type: Academic society, research group, etc. More details Close The objective of this project is to design a new energy system and social system that integrates electric energy, thermal energy, and transportation energy with the aim of building a low-carbon society. Through a survey of trends in various energy resource utilization technologies, including fossil fuels, and an understanding of various energy technologies, ranging from large-scale intensive to decentralized, we will identify energy systems that optimally combine technological elements and desirable implementation measures. Show all Show first 5 Other 30 How to Deign a Carbon-Neutral Society More details Close Tohoku University Open Campus Open Class 宮古市スマートコミュニティ策定促進事業 More details Close 地域分散型のエネルギーシステムのデザイン スマート林業におけるマテリアル及びエネルギーフローのデザイン More details Close プラチナ構想ネットワーク開催のスマート林業WGでの検討をふまえて、実相フィールドにおける現状及び将来のマテリアル（木材）及びエネルギーフローを構築する。 再生可能水素製造設備の将来コスト予測と社会便益の評価：概念設計 More details Close CO2を排出しない水素製造の将来コスト低減を予測し、燃料電池技術普及シナリオ作成に活用する。 バイオマス発電を中心とした炭素循環モデルの解析技術の構築に関する研究 More details Close バイオマス利活用システムの性能を、経済性、環境保全、エネルギーバランスの諸要因から評価する手法を構築する。 温室効果ガス削減に向けた大型火力発電所へのバイオマス導入可能性調査 More details Close 本研究では、大型火力発電設備へのバイオマス導入の可能性を明らかにするために、原料調達から前処理、輸送、加工等を経て燃焼、廃棄物最終処分までのトータルプロセスを対象として、各プロセス要素（集配、粉砕、乾燥、炭化、造粒、運送、温湿管理、余熱、燃焼、灰処理等）に分割する。各種支配要因（利用効率、熱効率、運送費、運転費、排出権取引価格、設備費等）を抽出し、技術的側面（エネルギー効率等）および経済的側面（費用等）からシステム性能を評価するとともに、予想される課題を抽出する。 微細藻類バイオマスエネルギーシステムの導入可能性評価 More details Close 微細藻類バイオマスエネルギーシステムの導入可能性評価 ロードヒーティングの伝熱特性計算 More details Close ロードヒーティングの伝熱特性計算 下水汚泥処理・エネルギー利用方法の環境性評価 More details Close 下水汚泥処理・エネルギー利用方法の環境性評価 バイオエタノールの最適生産・利用に向けた東アジア地域諸国の政策連携スキームの提案 More details Close バイオエタノールの最適生産・利用に向けた東アジア地域諸国の政策連携スキームの提案 東北エリアにおけるバイオマス利用可能量調査並びに石炭火力混焼ケーススタディ More details Close バイオマスの利活用実態を調査して、石炭混焼した場合の経済性、環境性、エネルギー効率性、RPSなど、多面的かつ現実に即した評価手法を研究する。 宮古島バイオマス再利用システムの評価手法の開発 More details Close バイオマス利活用最適設計ツールであるＯＭＵＮＩＢＵＳを用い、宮古島全体のバイオマスの最適な利活用システムの解析と分析を行い、様々なシナリオでの最適なシステム構成を模索し、基礎データを作成する。 Study tour for Master course students Study tour for Master course students Study tour for Master course students 廃プラスチック利用のための地域循環システムの最適設計 More details Close 廃プラスチックを地域内にて循環、利活用できるシステムを設計する。 実践的環境・省エネルギーＭＯＴプログラム設計 More details Close 技術経営の人材育成プログラムを開発する。 International Gas Turbine Conference Exhibition 環境ビジネススタディツアー 環境ビジネス・プログラム More details Close 環境経営の理念と実践手法の構築を目的とする。 分散型新エネルギーシステムの経済性評価 More details Close 風力、太陽光、バイオマス等を統合した分散型新エネルギーシステムの実用に向けて、エネルギーシステムの経済性を統合的に評価する手法を調査する。 Most study tour 2002 非線形エネルギー経済モデルによる小型原子炉・自然エネルギー連系システムの設計研究 More details Close 非線形エネルギー経済モデルを開発して、小型原子炉と自然エネルギーを連携した新しいシステム設計に応用する。 Models for the implecation of CO2 reduction More details Close 岩手県環境保健研究センターと共同で、二酸化炭素削減対策のためのエネルギー環境政策を、モデル解析を応用して策定する。 水素利用カーボンレス・エネルギーシステムの統合評価 More details Close 水素エネルギーを基盤とした、カーボンレス・エネルギーシステムを設計しその性能を統合評価する。米国ローレンス・リバモア国立研究所との共同研究。 Design for hydrogen-based, carbon-less energy systems More details Close 米国ローレンス・リバモア国立研究所と共同で、水素利用のためのエネルギーシステムを設計する。 二酸化炭素削減のための政策オプションの検討と日韓エネルギー技術協力 More details Close 日本と韓国とが共同で二酸化炭素を削減するためのエネルギー環境政策を検討し、両国のエネルギー技術協力の可能性を明らかにする。 Development of an energy-economic model More details Close エネルギーフロー、カーボンフロー、キャッシュフローの解析を目的として、エネルギー経済モデルを開発する。 JICA, Environmental Impact Assessment More details Close October 11 to October 13. Pre-training in Tokyo. October 15 to October 29. On-site training in Indonesia. FASID Research Fellow Trainee More details Close Attended Environmental Impact Assessment training in Hawaii, U.S.A. from February 19 (Sun.) to March 5 (Sun.). Show all Show first 5