• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Optimization of Low Enthalpy Power Generation System Based on Constructal Law

Research Project

Project/Area Number 20K04313
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 19020:Thermal engineering-related
Research InstitutionSaga University

Principal Investigator

YASUNAGA TAKESHI  佐賀大学, 海洋エネルギー研究所, 助教 (50758076)

Co-Investigator(Kenkyū-buntansha) 足立 高弘  秋田大学, 理工学研究科, 教授 (60344769)
松田 吉隆  佐賀大学, 海洋エネルギー研究センター, 准教授 (00578429)
Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2022: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Keywords低エンタルピー / 低温度差発電 / FTT / エクセルギー / コンストラクタル最適化 / 低エンタルピー熱 / 有限時間の熱力学 / コンストラクタル法則 / 低熱源間温度差発電 / 海洋温度差発電 / エントロピー生成最小化 / プレート式熱交換器 / 伝熱面 形状最適化 / 伝熱面形状最適化 / 標準熱効 / エントロピー生成量最小化
Outline of Research at the Start

本研究は、Finite-time Thermodynamicsを基に、低熱源間温度差の発電システム特有の熱機関内・外の不可逆損失を考慮し、新たな熱力学的基礎モデルを構築することを第一の研究目的とする。さらに同モデルを駆使し、物体形状と熱・流動抵抗の原理を示すコンストラクタル法則に基づき、発電システム内の熱源の最適流量制御および熱交換器の伝熱面形状の最適化を目指した基盤を確立することを第二の研究目的とする。本研究は、低熱源間温度差発電システムの新たな基礎理論を確立し、その活用にて発電システムを高効率化かつ最適化を行うことを目指す。

Outline of Final Research Achievements

For the thermal energy such as factory exhaust heat, hot spring water, the ocean thermal energy is not utilized enough until now because the temperature difference between the heat source and the sink is extremely small, and the available flow rate is limited. In this study, we built a finite-time thermodynamics (FTT) model in consideration of the low temperature of heat source, and finiteness of the heat capacity. And the exergy analysis using FTT predicts the net power output from the system, and gives the detail performance of components based on net power output.
Furthermore, the operation control model and the novel performance evaluation index of the plate-type heat exchanger have proposed by extended the FTT model. In addition, the performance evaluation index of the plate-type heat exchanger was applied to the objective function for optimizing the surface geometry of the heat exchanger to be applied in the power generation system.

Academic Significance and Societal Importance of the Research Achievements

本研究は、低位で未利用な熱エネルギーを利活用して発電するシステムの研究である。低位の熱エネルギー利用では、従来の火力発電とは設計条件が大きく異なり、熱機関の出力は、熱交換時の温度ロス(非平衡)、熱機関が利用可能な温度差等のバランスが重要である。本研究は、熱源・冷却側が熱的平衡になる状態を基準とした熱効率やエクセルギーを算出するという、これまでに無い、独創的な考えを導入し、プロセス全体の視点から発電性能だけでなく構成機器個別の性能評価に発展させた。この熱力学モデルの基礎構築は、学術的および工業的に大きな意義が有り、発電装置の性能向上に必要なだけでなく、社会実装に重要な視点となり得ると考える。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (37 results)

All 2023 2022 2021 2020 Other

All Int'l Joint Research (1 results) Journal Article (15 results) (of which Int'l Joint Research: 5 results,  Peer Reviewed: 12 results,  Open Access: 9 results) Presentation (18 results) (of which Int'l Joint Research: 13 results) Remarks (3 results)

  • [Int'l Joint Research] Universiti Technologi Malysia(マレーシア)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Performance Analysis of a 10 MW Ocean Thermal Energy Conversion Plant Using Rankine Cycle in Malaysia2023

    • Author(s)
      Thirugnana Sathiabama T.、Jaafar Abu Bakar、Rajoo Srithar、Azmi Ahmad Aiman、Karthikeyan Hariharan Jai、Yasunaga Takeshi、Nakaoka Tsutomu、Kamyab Hesam、Chelliapan Shreeshivadasan、Ikegami Yasuyuki
    • Journal Title

      Sustainability

      Volume: 15 Issue: 4 Pages: 3777-3777

    • DOI

      10.3390/su15043777

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A Pseudo-measurement Approach to State Estimation for Liquid Level Control of Separator in an OTEC Plant Using Uehara Cycle2022

    • Author(s)
      Ushijima Kotaro、Matsuda Yoshitaka、Sugi Takenao、Goto Satoru、Morisaki Takafumi、Yasunaga Takeshi、Ikegami Yasuyuki
    • Journal Title

      Proceedings of the ISCIE International Symposium on Stochastic Systems Theory and its Applications

      Volume: 2022 Issue: 0 Pages: 129-134

    • DOI

      10.5687/sss.2022.129

    • ISSN
      2188-4730, 2188-4749
    • Year and Date
      2022-03-31
    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] OTEC and Advanced Deep Ocean Water Use for Kumejima: An Introduction2022

    • Author(s)
      Martin Benjamin、Okamura Shin、Yasunaga Takeshi、Ikegami Yasuyuki、Ota Naoki
    • Journal Title

      Proceedings of OCEANS 2022 in Chennai

      Volume: - Pages: 1-5

    • DOI

      10.1109/oceanschennai45887.2022.9775240

    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] Construction of a State Space Model for a Spray Flash Desalination System with Valve Dynamics2022

    • Author(s)
      Yoshitaka Matsuda, Ayato Ehara, Takenao Sugi, Satoru Goto, Takafumi Morisaki, Takeshi Yasunaga, Yasuyuki Ikegami
    • Journal Title

      Proceedings of SICE Annual Conference 2022

      Volume: - Pages: 448-453

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Construction of a State Space Model with Working Fluid Flow Rate Inputs for an OTEC Plant Using Double-stage Rankine Cycle2022

    • Author(s)
      Yoshitaka Matsuda, Daiki Suyama, Takenao Sugi, Satoru Goto, Takafumi Morisaki, Takeshi Yasunaga, Yasuyuki Ikegami
    • Journal Title

      Proceedings of SICE Annual Conference 2022

      Volume: - Pages: 442-447

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Power Generation Control of OTEC Plant Using Hybrid Cycle by Cold Seawater Flow Rate Regulation2022

    • Author(s)
      Yoshitaka Matsuda, Ryo Izutsu, Takenao Sugi, Satoru Goto, Takafumi Morisaki, Takeshi Yasunaga, Yasuyuki Ikegami,
    • Journal Title

      Proceedings of SICE Annual Conference 2022

      Volume: - Pages: 71-74

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed
  • [Journal Article] 熱力学的視点からの海洋温度差発電向け熱交換器の性能評価手法の提案2022

    • Author(s)
      宮﨑 彬,安永 健,Kevin Fontaine,池上 康之
    • Journal Title

      OTEC

      Volume: 26 Pages: 19-24

    • Related Report
      2021 Research-status Report
    • Open Access
  • [Journal Article] 久米島沖における海洋温度差発電と海洋深層水複合利用のための海洋調査2021

    • Author(s)
      浦田和也, 安永健, 池上康之, 小見聡史, 冨賀見清彦, 田中辰彦, 鎌野忠, 石田雅照, 大原順, 西田哲也, 中岡勉
    • Journal Title

      海洋深層水研究

      Volume: 22 Pages: 39-47

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Comprehensive heat exchanger performance evaluation method on ocean thermal energy conversion for maximum net power2021

    • Author(s)
      Takeshi Yasunaga, Akira Miyazaki, Kevin Fontaine, Yasuyuki Ikegami
    • Journal Title

      Proceedings of the 6th International Seminar on ORC Power Systems

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Exergetic Performance Evaluation of Ocean Thermal Energy Conversion System with Crossflow Plate Heat Exchangers2021

    • Author(s)
      Takeshi Yasunaga, Taisei Nakamura, Tomoya Okuno, Yasuyuki Ikegami
    • Journal Title

      Proceedings of the 6th International Seminar on ORC Power Systems

      Volume: -

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Performance Evaluation Concept for Ocean Thermal Energy Conversion toward Standardization and Intelligent Design2021

    • Author(s)
      Yasunaga Takeshi, Fontaine Kevin, Ikegami Yasuyuki
    • Journal Title

      Energies

      Volume: 14 Issue: 8 Pages: 2336-2336

    • DOI

      10.3390/en14082336

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Fundamental characteristics in power generation by heat engines on ocean thermal energy conversion (Construction of finite-time thermodynamic model and effect of heat source flow rate)2020

    • Author(s)
      YASUNAGA Takeshi、IKEGAMI Yasuyuki
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 86 Issue: 886 Pages: 19-00383-19-00383

    • DOI

      10.1299/transjsme.19-00383

    • NAID

      130007864402

    • ISSN
      2187-9761
    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Theoretical model construction for renewable low-grade thermal energy conversion: an insight from finite-time thermodynamics2020

    • Author(s)
      Takeshi Yasunaga, Yasuyuki Ikegami
    • Journal Title

      Proceedings of IIR Rankine Conference 2020

      Volume: N/A Pages: 1185-1185

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Parametric analysis of novel self-water supply ORC power system for hot spring thermal energy conversion2020

    • Author(s)
      Takeshi Yasunaga, Tomoya Okuno, Yasuyuki Ikegami
    • Journal Title

      Proceedings of IIR Rankine Conference 2020

      Volume: N/A Pages: 1184-1184

    • NAID

      130007999776

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Performance evaluation of the ocean thermal energy conversion system using cross-flow plate type heat exchangers2020

    • Author(s)
      Takeshi Yasunaga, Taisei Nakamura, Tomoya Okuno, Yasuyuki Ikegami
    • Journal Title

      OTEC (in Japanese)

      Volume: 25 Pages: 69-74

    • NAID

      40022474321

    • Related Report
      2020 Research-status Report
    • Open Access
  • [Presentation] Construction of a State Space Model for a Spray Flash Desalination System with Valve Dynamics2022

    • Author(s)
      Yoshitaka Matsuda
    • Organizer
      SICE Annual Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Construction of a State Space Model with Working Fluid Flow Rate Inputs for an OTEC Plant Using Double-stage Rankine Cycle2022

    • Author(s)
      Yoshitaka Matsuda
    • Organizer
      SICE Annual Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Power Generation Control of OTEC Plant Using Hybrid Cycle by Cold Seawater Flow Rate Regulation2022

    • Author(s)
      Yoshitaka Matsuda
    • Organizer
      SICE Annual Conference 2022
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A Pseudo-measurement Approach to State Estimation for Liquid Level Control of Separator in an OTEC Plant Using Uehara Cycle2022

    • Author(s)
      Kotaro Ushijima
    • Organizer
      ISCIE International Symposium on Stochastic Systems Theory and its Applications
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] OTEC and Advanced Deep Ocean Water Use for Kumejima: An Introduction2022

    • Author(s)
      Martin Benjamin
    • Organizer
      OCEANS 2022 - Chennai
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] COMPONENTS IN CLOSED CYCLE OTEC SYSTEM: A REVIEW2022

    • Author(s)
      Karthikeyan, H. J.
    • Organizer
      18th International Conference on Clean Energy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] AN ASSESSMENT ON TECHNICAL CHALLENGES OF HEAT EXCHANGER IN HYBRID OTEC2022

    • Author(s)
      Azmi, A. A
    • Organizer
      18th International Conference on Clean Energy
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ハイブリッドサイクルを用いた海洋温度差発電プラントの温海水流量調節による発電量制御2022

    • Author(s)
      井筒遼
    • Organizer
      第66回システム制御情報学会研究発表講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] Comprehensive heat exchanger performance evaluation method on ocean thermal energy conversion for maximum net power2021

    • Author(s)
      Akira Miyazaki
    • Organizer
      The 6th International Seminar on ORC Power Systems
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Exergetic Performance Evaluation of Ocean Thermal Energy Conversion System with Crossflow Plate Heat Exchangers2021

    • Author(s)
      Taisei Nakamura
    • Organizer
      The 6th International Seminar on ORC Power Systems
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] Finite-time Thermodynamics に基づく海洋温度差発電用熱交換器の 性能評価指標の提案2021

    • Author(s)
      宮﨑 彬
    • Organizer
      第 25 回動力・エネルギー技術シンポジウム
    • Related Report
      2021 Research-status Report
  • [Presentation] 画像処理を用いた透明樹脂プレート式蒸発器の可視化による ボイド率測定 低ボイド率域の気泡流動2021

    • Author(s)
      中山 雅士
    • Organizer
      日本機械学会熱工学コンファレンス
    • Related Report
      2021 Research-status Report
  • [Presentation] Thermodynamics for the Standardization of Performance Evaluation on OTEC2021

    • Author(s)
      Takeshi Yasunaga, Yasuyuki Ikegami
    • Organizer
      8th International OTEC Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Simplification of Heat Exchanger Selection for OTEC Using Carnot Cycle Based Maximum Power Output Assessment2021

    • Author(s)
      Fontaine Kevin, Takeshi Yasunaga, Yasuyuki Ikegami
    • Organizer
      8th International OTEC Symposium
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Theoretical model construction for renewable low-grade thermal energy conversion: an insight from finite-time thermodynamics2021

    • Author(s)
      Takeshi Yasunaga, Yasuyuki Ikegami
    • Organizer
      IIR Rankine Conference 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Parametric analysis of novel self-water supply ORC power system for hot spring thermal energy conversion2021

    • Author(s)
      Takeshi Yasunaga, Tomoya Okuno, Yasuyuki Ikegami
    • Organizer
      IIR Rankine Conference 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Parametric Analysis on Novel Self-water Supply ORC Power System for Hot-Spring Thermal Energy Conversion (in Japanese)2020

    • Author(s)
      Tomoya Okuno, Takeshi Yasunaga, Yasuyuki Ikegami
    • Organizer
      Thermal Engineering Conference 2020
    • Related Report
      2020 Research-status Report
  • [Presentation] Fundamental Characteristics of Power Output on Ocean Thermal Energy Conversion System Using Cross-flow Heat Exchangers (in Japanese)2020

    • Author(s)
      Takeshi Yasunaga, Taisei Nakamura, Tomoya Okuno, Yasuyuki Ikegami
    • Organizer
      Thermal Engineering Conference 2020
    • Related Report
      2020 Research-status Report
  • [Remarks] 佐賀大学教員活動データベース

    • URL

      https://research.dl.saga-u.ac.jp/profile/ja.4741da2f3a41f9d759c123490551be02.html

    • Related Report
      2022 Annual Research Report
  • [Remarks] 安永健研究進捗紹介ホームページ

    • URL

      https://takeshi-yasunaga.hp.peraichi.com/research

    • Related Report
      2022 Annual Research Report
  • [Remarks] マレーシアにおける革新的なOTECの開発による低炭素社会のための持続可能なエネルギーシステムの構築

    • URL

      https://www.jst.go.jp/global/kadai/h3003_malaysia.html

    • Related Report
      2020 Research-status Report

URL: 

Published: 2020-04-28   Modified: 2024-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi