Evaluation of a CO2 Network System for District Heating and Cooling Using Energy Storage Tanks

Jungo Kajita*, Akira Yoshida, Yoshiharu Amano*

*この研究の対応する著者

研究成果: Paper査読

抄録

District heating and cooling (DHC) systems have attracted interest in reducing CO2 emissions, and a 5th-generation DHC (5GDHC) is being proposed in Europe, which supplies a heat-transport medium at ambient temperature and utilizes various unused heat sources. 5GDHC systems have the characteristics of being nonlinear, bi-directional and decentralized. The CO2 network system has similar concepts in these aspects, but the system adopts CO2 refrigerant as heat-transport medium and uses the latent heat of vaporization of CO2 refrigerant to transport and exchange unused heat to specific areas via decentralized heat pumps (DHPs). Previous studies have confirmed that the CO2 network system can reduce the total annual energy consumption by up to 80% compared to the conventional 1st-generation DHC (1GDHC) system using fossil fuels as heat source in Japan. In this study, evaluation of the CO2 network system, properly storing surplus variable renewable energy (VRE) into storage tanks (STs), is clarified by a flexible grid operation. In addition, it is confirmed that the “zero CO2 emission” can be achieved by the CO2 network with STs in optimal operation. The effectiveness of the CO2 network system with STs is quantified compared to the 1GDHC system.

本文言語English
出版ステータスPublished - 2021
イベントInternational Conference on Power Engineering 2021, ICOPE 2021 - Virtual, Online
継続期間: 2021 10月 172021 10月 21

Conference

ConferenceInternational Conference on Power Engineering 2021, ICOPE 2021
CityVirtual, Online
Period21/10/1721/10/21

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 燃料技術
  • 電子工学および電気工学

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