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Optimisation of District Energy Distribution and Storage System by CO2 Network

Research Project

Project/Area Number 19K12432
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 64050:Sound material-cycle social systems-related
Research InstitutionWaseda University

Principal Investigator

AMANO Yoshiharu  早稲田大学, 理工学術院, 教授 (60267474)

Co-Investigator(Kenkyū-buntansha) 吉田 彬  早稲田大学, スマート社会技術融合研究機構, 次席研究員 (90707887)
Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Keywords分散ヒートポンプ / CO2 / 最適化 / 再生可能エネルギー / エネルギー貯蔵 / 地域熱供給 / CO2ネットワーク / システム最適化 / ヒートポンプ / 最適設計 / 未利用エネルギー
Outline of Research at the Start

熱と電力双方を面的に最適利用するシステムを提案する.これはCO2を採用することで常温近傍の潜熱輸送を実現し,熱損失を抑える利点をもつ.また,一組の輸送配管で温熱および冷熱双方に対応し,需要の局所的な不均一性の平準化が可能である.システム開発にはCO2給湯機などの開発で培った技術を利用可能である.
同時に,最小限の要素で最適なサイクルを構成する組み合わせ最適化理論を構築することで,地域で利用可能な再生可能エネルギー資源や,未利用熱源を最大限利用した発電・冷凍・冷温熱供給装置からなるシステムを最適化する設計・開発環境を構築し,熱力学的な最適性を担保した地域エネルギー供給システムの設計を可能とする.

Outline of Final Research Achievements

This study shows that a fifth generation district heat supply system, a decentralised heat pump system with CO2 as the heat transport medium, applicable from floor units to buildings and then to the entire region, significantly reduces operational CO2 emissions.
It was found that the connection of hot and cold heat demand areas that occur at the same time in remote locations within a region by means of a heat transport medium makes a significant contribution to operational optimisation by levelling out local heterogeneity and by using the heat transport medium for the storage of surplus energy. Design guidelines were derived to minimise operational CO2 emissions by finding the optimum combination of heat demand characteristics and the maximum utilisation of unused and renewable energy potential.

Academic Significance and Societal Importance of the Research Achievements

熱の面的利用の利点は認知されていたが,日本では特に高効率機器の開発に主眼が置かた.一方,常温近傍での熱利用にはヒートポンプが最適な選択であることは周知の事実であった.しかし.これらをネットワークとして接続することで分散システムを構成し,システム全体の最適化の筋道を明確にした研究はほとんどなかった.また,欧州で研究されていた動力サイクルの理論的最適化手法をヒートポンプサイクルに適用し,吸収式サイクルへと拡張することで,より一般性のある最適な熱力学サイクル群を導出する理論を構築したことは学術的価値が高い.また,地域で入手可能なエネルギー資源を有効に利用することの重要性を説いた点に社会的意義がある.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2021 2020 2019 Other

All Int'l Joint Research (1 results) Journal Article (4 results) (of which Peer Reviewed: 3 results) Presentation (6 results) (of which Int'l Joint Research: 3 results)

  • [Int'l Joint Research] EPFL(スイス)

    • Related Report
      2019 Research-status Report
  • [Journal Article] Temporal-spatial exergy resource characteristics for 5th-generation district heating and cooling system2021

    • Author(s)
      KAJITA Jungo、YOSHIDA Akira、AMANO Yoshiharu
    • Journal Title

      The Proceedings of the National Symposium on Power and Energy Systems

      Volume: 2021.25 Issue: 0 Pages: E231

    • DOI

      10.1299/jsmepes.2021.25.E231

    • NAID

      130008144577

    • ISSN
      2424-2950
    • Related Report
      2021 Annual Research Report
  • [Journal Article] Demonstration of the revised procedure to explore configurations for an arbitrary absorption cycle based on the cycle simplicity index2021

    • Author(s)
      Ito Wataru、Takeshita Keisuke、Amano Yoshiharu
    • Journal Title

      Energy

      Volume: 235 Pages: 121172-121172

    • DOI

      10.1016/j.energy.2021.121172

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Estimation of the utility value of unused heat sources for a CO2 network system in Tokyo2021

    • Author(s)
      Nagano Takahiro、Kajita Jungo、Yoshida Akira、Amano Yoshiharu
    • Journal Title

      Energy

      Volume: 226 Pages: 120302-120302

    • DOI

      10.1016/j.energy.2021.120302

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] Evaluation on CO<sub>2</sub> network for district heating and cooling system2020

    • Author(s)
      NAGANO Takahiro、AMANO Yoshiharu
    • Journal Title

      Transactions of the JSME (in Japanese)

      Volume: 86 Issue: 883 Pages: 19-00365-19-00365

    • DOI

      10.1299/transjsme.19-00365

    • NAID

      130007815911

    • ISSN
      2187-9761
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Evaluation of a CO2 network system for district heating and cooling using energy storage tanks2021

    • Author(s)
      KAJITA Jungo、YOSHIDA Akira、AMANO Yoshiharu
    • Organizer
      International Conference on Power Engineering 2021
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] A study into the feasibility of introducing a CO2 network system for district heating and cooling in Tokyo2020

    • Author(s)
      Nagano Takahiro、Kajita Jungo、Yoshida Akira、Amano Yoshiharu
    • Organizer
      ECOS 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] Demonstration of bottom-up procedure to explore configurations for absorption power cycle2020

    • Author(s)
      Wataru Ito, Keisuke Takeshita, Amano Yoshiharu
    • Organizer
      ECOS 2020
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 需要の冷温熱量比に対するCO2ネットワークシステムの最適な機器構成と動作点の導出2020

    • Author(s)
      永野貴大,梶田純吾,天野嘉春
    • Organizer
      日本機械学会関東支部 第26期総会・講演会
    • Related Report
      2019 Research-status Report
  • [Presentation] CO2を熱輸送媒体とする複合型ビル用熱供給システムの導入効果の検討2020

    • Author(s)
      梶田純吾,永野貴大,吉田彬,天野嘉春
    • Organizer
      関東学生会第59回学生員卒業研究発表講演会論文集
    • Related Report
      2019 Research-status Report
  • [Presentation] CO2を熱輸送媒体とする地域エネルギー供給システムの基礎的検討2019

    • Author(s)
      永野貴大,板東泰彬,天野嘉春
    • Organizer
      第24回動力・エネルギー技術シンポジウム
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2023-01-30  

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