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Affiliation |
Engineering educational research section Research & Development Center for Sustanable Energy and Environmental Engineering |
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Professor |
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NISHIOKA Kensuke
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Degree 【 display / non-display 】
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Doctor (Engineering) ( 2004.3 Nara Institute of Science and Technology )
Research Areas 【 display / non-display 】
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Manufacturing Technology (Mechanical Engineering, Electrical and Electronic Engineering, Chemical Engineering) / Electric and electronic materials
Papers 【 display / non-display 】
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Analysis for Effects of Temperature Rise of PV Modules upon Driving Distance of Vehicle Integrated Photovoltaic Electric Vehicles Reviewed International coauthorship
Masafumi Yamaguchi, Yasuyuki Ota, Taizo Masuda, Christian Thiel, Anastasios Tsakalidis, Arnulf Jaeger-Waldau, Kenji Araki, Kensuke Nishioka, Tatsuya Takamoto, Takashi Nakado, Kazumi Yamada, Tsutomu Tanimoto, Yosuke Tomita, Yusuke Zushi, Kenichi Okumura, Takashi Mabuchi, Akinori Satou, Kyotaro Nakamura, Ryo Ozaki, Nobuaki Kojima, Yoshio Ohshita
Energy and Power Engineering 16 131 - 150 2024.4
Language：English Publishing type：Research paper (scientific journal)
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Design Optimization of Agri-Photovoltaic Systems in Different Climate Regions† Reviewed
Toyoda T., Yajima D., Araki K., Nishioka K.
IEEJ Transactions on Electrical and Electronic Engineering 19 ( 2 ) 208 - 214 2024.2
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：IEEJ Transactions on Electrical and Electronic Engineering
This paper examines the optimal design for agri-photovoltaic (agri-PV) systems. Agri-PV systems should be evaluated on the total crop yield and power generation, and the balance is essential. Specifically, the amount of solar irradiance reaching the farmland and power generation by PV systems varies by panel separation and tilt angle, affecting crop yield. Quantitative analysis is essential for balancing. This study investigated the balance between the output of Agri-PV installed on farmland and photosynthetic photon flux density (PPFD), a crucial indicator for crop growth, and discussed the optimal solutions for Agri-PV systems installed in various regions. Simulations were conducted for Miyazaki (semi-tropical) and Nagano (inland climate) to understand the changes in different climate regions. Miyazaki has higher PPFD and PV output than Nagano because Miyazaki has more solar irradiance and longer sunshine duration than Nagano. When the normalized panel pitch is small, PPFD changes significantly by the tilt angle. When the normalized panel pitch is large, the profit may be maximized by setting the panel tilt angle to maximize the PV output. © 2023 Institute of Electrical Engineer of Japan and Wiley Periodicals LLC.
DOI： 10.1002/tee.23943
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Shwe Sin P.P., Wai S.H., Ota Y., Nishioka K., Suzuki Y.
International Journal of Hydrogen Energy 53 86 - 92 2024.1
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：International Journal of Hydrogen Energy
Hydrogen production from renewable electricity offers an eco-friendly alternative to fossil fuels. Proton exchange membrane (PEM) electrolysis is a well-known method for this purpose. Studies have primarily focused on reducing costs of noble catalysts, improving efficiency, managing system degradation, and addressing membrane thinning caused by contaminated cations. However, techniques for PEM recovery post-degradation are still under development. This study investigated the effects of cations on PEM cells using artificial soft water, and analyzed two recovery methods to restore cell performance. Our findings indicate a significant rise in cell operating voltage and a decrease hydrogen production over 8 h of operation with soft water. After introducing both recovery methods, the initial operating value was reinstated in both cases. Only nitric acid treatment, however, achieved hydrogen production levels comparable to those of ultrapure water.
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Analysis of Climate Conditions upon Driving Distance of Vehicle Integrated Photovoltaics-Powered Vehicles Reviewed International coauthorship
Yamaguchi M., Nakamura K., Ozaki R., Kojima N., Ohshita Y., Masuda T., Okumura K., Mabuchi T., Satou A., Tanimoto T., Tomita Y., Zushi Y., Nakado T., Yamada K., Thiel C., Tsakalidis A., Jaeger-Waldau A., Takamoto T., Araki K., Ota Y., Nishioka K.
Energy Technology 12 ( 1 ) 2024.1
Authorship：Last author Language：English Publishing type：Research paper (scientific journal) Publisher：Energy Technology
The development of the vehicles powered by photovoltaic (PV) is desirable and very important for reducing CO2 emissions from the transport sector to realize a decarbonized society. Although long-distance driving of vehicle-integrated PV (VIPV)-powered vehicles without electricity charging is expected in sunny regions, driving distance of VIPV-powered vehicles is affected by climate conditions such as solar irradiation and outside temperature, and the power consumption of the air conditioners. In this article, analytical results for system efficiency of VIPV-powered vehicles and the effects of usage of air conditioner are presented by using power losses estimated from the electric mileage by using the driving distance data for Toyota Prius and Nissan Van demonstration cars installed with high-efficiency InGaP/GaAs/InGaAs three-junction solar cell modules with a module efficiency of more than 30%. The potential of VIPV-powered vehicles to be deployed in major cities in Japan and the world is also analyzed. Mild weather cities such as Miyazaki in Japan and Sydney in Australia are thought to have longer driving range even under usage of air conditioners. The other power losses for the VIPV such as temperature rise of VIPV modules and partial shading estimate the previous data and some reference as well as effects of usage of air-conditioners are also discussed in this article.
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Evaluation of thermoelectric conversion efficiency of multinary thermoelectric material Cu2ZnSnS4 by simulation Reviewed
Nagatomo Katsuma, Nagaoka Akira, Nishioka Kensuke
Journal of Ternary and Multinary Compounds 2023 ( 0 ) 13 - 16 2024
Language：Japanese Publishing type：Research paper (conference, symposium, etc.) Publisher：The Japan Society of Applied Physics, Professional Group of Multinary Compounds and Solar Cells
Books 【 display / non-display 】
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水素の製造、輸送・貯蔵技術と材料開発 事例集
西岡賢祐（ Role： Contributor）
㈱技術情報協会 2019.4
Language：Japanese Book type：Scholarly book
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Concentrator Photovoltaic Systems: Introduction, Wiley Encyclopedia of Electrical and Electronics Engineering
Kensuke Nishioka, Yasuyuki Ota（ Role： Joint author）
John Wiley & Sons, Inc. 2017.11
Total pages：12 Responsible for pages：12 Language：English Book type：Dictionary, encyclopedia
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太陽熱発電の最新動向
西岡賢祐 (玉浦裕 監修)（ Role： Joint author）
シーエムシー出版 2014.11
Language：Japanese Book type：Scholarly book
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新太陽エネルギー利用ハンドブック 第Ⅴ編 太陽光発電技術
西岡賢祐（ Role： Joint author）
一般社団法人日本太陽エネルギー学会 2013.12
Language：Japanese Book type：Scholarly book
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高効率太陽電池
山口真史 監修（ Role： Joint author）
NTS出版 2012.5
Language：Japanese Book type：Scholarly book
MISC 【 display / non-display 】
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太陽光由来の貯蔵可能燃料 Invited
西岡賢祐
カーボン・エネルギーコントロール社会協議会 (CanApple): CanAppleニュース ( 230 ) 2022.4
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：一般財団法人光産業技術振興協会
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世界一の効率を達成した太陽光からの水素製造 Invited
西岡 賢祐
経済産業省 九州経済産業局 水素とともに描く地域・企業の未来 事例から紐解く！九州水素ガイドブック ( 49 ) 2022.4
Authorship：Lead author Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (other)
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MBD活用デジタル制御の太陽光発電・水素製造システム Invited
中島 善康、米澤 遊、太田 靖之、西岡 賢祐
エネルギー・資源 43 ( 251 ) 44 - 49 2022.1
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：一般財団法人光産業技術振興協会
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最新の太陽光発電応用技術 Invited Reviewed
西岡賢祐
オプトニューズ テクノロジートレンド 15 ( 3 ) 16 - 20 2020.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (trade magazine, newspaper, online media) Publisher：一般財団法人光産業技術振興協会
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Multivariate Analysis Using R for Various Climatic Effects on the Output Performances of CIGS and Multi-Crystalline Si Photovoltaic Systems Installed in Miyazaki, Japan
Kyaw Myo WIN, Yasuyuki OTA, Kensuke NISHIOKA, Tatsuya SAKODA, Noriyuki HAYASHI
宮崎大学工学部紀要 49 119 - 127 2020.9
Language：Japanese Publishing type：Article, review, commentary, editorial, etc. (bulletin of university, research institution) Publisher：国立大学法人宮崎大学
Presentations 【 display / non-display 】
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High Efficiency (> 40%) InGaAsP Photovoltaic Device for 1.06-µm-range Laser Power Transmission International conference
Yuga Motomura, Takaya Oshimo, Masahiro Koga, Kosuke Watanebe, Shiro Uchida, Kouichi Akahane, Yukiko Suzuki, Natsuha Ochiai, Kazuto Kashiwakura, Youhei Toriumi, Kensuke Nishioka, Masakazu Arai
OPTICS & PHOTONICS International Congress 2024 (Pacifico Yokohama, Kanagawa, Japan) OPTICS & PHOTONICS International Congress 2024
Event date： 2024.4.22 - 2024.4.26
Language：English Presentation type：Oral presentation (general)
Venue：Pacifico Yokohama, Kanagawa, Japan
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Improvement of Power Conversion Efficiency under High Intensity Laser Irradiation Using Thick Gold Plating International conference
Takaya Oshimo, Yuga Motomura, Yukiko Suzuki, Natsuha Ochiai, Kazuto Kashiwakura, Youhei Toriumi, Kensuke Nishioka, Masakazu Arai
OPTICS & PHOTONICS International Congress 2024 (Pacifico Yokohama, Kanagawa, Japan) OPTICS & PHOTONICS International Congress 2024
Event date： 2024.4.22 - 2024.4.26
Language：English Presentation type：Poster presentation
Venue：Pacifico Yokohama, Kanagawa, Japan
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Testing and rating of VIPV: Scientific background International conference
Kenji Araki, Sho Kuranaga, Yasuyuki Ota, Kensuke Nishioka
PV in Motion 2024 (Microcity-EPFL, Neuchâtel, Switzerland) PV in Motion 2024
Event date： 2024.3.6 - 2024.3.8
Language：English Presentation type：Oral presentation (general)
Venue：Microcity-EPFL, Neuchâtel, Switzerland
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Outdoor evaluation of total cross tied (TCT) Si module under driving conditions International conference
Yasuyuki Ota, Keiya Tamada, Kyotaro Nakamura, Masafumi Yamaguchi, Yoshio Ohshita, Kenji Araki, Kensuke Nishioka
PV in Motion 2024 (Microcity-EPFL, Neuchâtel, Switzerland) PV in Motion 2024
Event date： 2024.3.6 - 2024.3.8
Language：English Presentation type：Oral presentation (general)
Venue：Microcity-EPFL, Neuchâtel, Switzerland
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PV on Heavy Duty Vehicles (HDVs) project in Japan International conference
Kenji Araki, Takumi Konuma, Makoto Tanaka, Yasuyuki Ota, Shiro Sakamoto, Kensuke Nishioka
PV in Motion 2024 (Microcity-EPFL, Neuchâtel, Switzerland) PV in Motion 2024
Event date： 2024.3.6 - 2024.3.8
Language：English Presentation type：Poster presentation
Venue：Microcity-EPFL, Neuchâtel, Switzerland
Awards 【 display / non-display 】
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第13回半導体材料・デバイスフォーラム ポスター発表優秀賞
2022.10 第13回半導体材料・デバイスフォーラム 実行委員会 Ag混晶による熱電変換材料(Cu1-xAgx)2ZnSnS4の伝導型制御
岡本 晃一，永岡 章，重枝 佑輔，吉野 賢二，西岡 賢祐
Award type：Award from Japanese society, conference, symposium, etc.
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第13回半導体材料・デバイスフォーラム 口頭発表優秀賞
2022.10 第13回半導体材料・デバイスフォーラム 実行委員会 環境調和型熱電材料Cu2ZnSnS4の結晶粒界導入による熱伝導率の低下
長友 克馬，永岡 章，岡本 晃一，西岡 賢祐
Award type：Award from Japanese society, conference, symposium, etc.
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第12回半導体材料・デバイスフォーラム 口頭発表優秀賞
2021.12 第12回半導体材料・デバイスフォーラム 実行委員会 熱電変換材料(Cu1-xAgx)2ZnSnS4の伝導型制御
岡本 晃一，永岡 章，重枝 佑輔，吉野 賢二，西岡 賢祐
Award type：Award from Japanese society, conference, symposium, etc.
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第4回フロンティア太陽電池セミナー 優秀賞
2019.11 フロンティア太陽電池セミナー実行委員会 多接合太陽電池の出力解析モデルの確立および精度検証
才木 大夢, 西岡 賢祐
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
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2019年度第16回日本熱電学会学術講演会 優秀講演賞
2019.9 一般社団法人日本熱電学会 Se混晶によるCu2ZnSn(SXSe1-X)4単結晶のZT向上
永岡 章, 吉野 賢二, 増田 泰造, Michael Scarpulla, 西岡 賢祐
Award type：Award from Japanese society, conference, symposium, etc. Country：Japan
Grant-in-Aid for Scientific Research 【 display / non-display 】
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固体高分子水電解における不純物起因劣化メカニズムの解明および特性回復手法の確立
Grant number：19K12401 2019 - 2022.03
科学研究費補助金 基盤研究(C)
Authorship：Principal investigator
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高効率太陽電池材料の高倍率集光時におけるキャリアの動的ふるまいの解明
2013.04 - 2018.03
科学研究費補助金 基盤研究(B)
Authorship：Principal investigator
高効率太陽電池材料の高倍率集光時におけるキャリアの動的ふるまいの解明
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直線偏光Nd:YAGレーザーによる微細金属ドットの2次元規則配列加工に関する研究
2006.04 - 2008.03
科学研究費補助金 若手研究(B)
コヒーレントな直線偏光Nd:YAGパルスレーザーを試料に照射することにより溶融金属内に自発的に発生するレーザー誘導周期的エネルギー密度分布を利用し、位置と大きさを制御した規則性配列微細金属ドットの形成に取り組んだ。直線偏光Nd:YAGパルスレーザーをSi酸化膜上に堆積したニッケル薄膜に照射するだけで、位置と大きさを制御した規則性配列微細ニッケルドットを形成することに成功した。
Available Technology 【 display / non-display 】
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太陽光発電由来水素およびメタンの生成
各種太陽光発電システムの高精度発電量予測
地域のエネルギーと農資源を循環する低コストシステムMessage：太陽光発電の新規応用について研究開発を行っています。
メガソーラーの最適設置方法の検討や発電量予測について実績があります。