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Energy-Saving and CO 2 -Emissions-Reduction Potential of a Fuel Cell Cogeneration System for Condominiums Based on a Field Survey

Author

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  • Kazui Yoshida

    (Graduate School of Environmental and Information Studies, Tokyo City University, Yokohama 224-8551, Japan
    Tokyu Fudosan R&D Center Inc., Tokyo 150-0043, Japan)

  • Hom B. Rijal

    (Graduate School of Environmental and Information Studies, Tokyo City University, Yokohama 224-8551, Japan)

  • Kazuaki Bohgaki

    (Graduate School of Environmental and Information Studies, Tokyo City University, Yokohama 224-8551, Japan)

  • Ayako Mikami

    (Tokyo Gas Co., Ltd., Tokyo 105-8527, Japan)

  • Hiroto Abe

    (Teamnet Inc., Tokyo 155-0033, Japan)

Abstract

A residential cogeneration system (CGS) is highlighted because of its efficient energy usage on both the supplier and consumer sides. It generates electricity and heat simultaneously; however, there is insufficient information on the efficiency according to the condition of usage. In this study, we analysed the performance data measured by the home energy management system (HEMS) and the lifestyle data of residents in a condominium of 356 flats where fuel cell CGS was installed in each flat. The electricity generated by CGS contributed to an approximately 12% reduction in primary energy consumption and CO 2 emission, and the rate of generation by the CGS in the electric power demand (i.e., contribution rate) was approximately 38%. The electricity generation was mainly affected by the use of electricity up to 4 MWh/household/year. Gas or water use also impacted electric power generation, with water use as the primary factor affecting the contribution rate. Electric power generation changes monthly, mainly based on the water temperature. From these results, we confirmed that a CGS has substantial potential to reduce energy consumption and CO 2 emission in condominiums. Thus, it is recommended for installation of fuel cell CGS in existing and new buildings to contribute to the energy-saving target of the Japanese Government in the residential sector.

Suggested Citation

  • Kazui Yoshida & Hom B. Rijal & Kazuaki Bohgaki & Ayako Mikami & Hiroto Abe, 2021. "Energy-Saving and CO 2 -Emissions-Reduction Potential of a Fuel Cell Cogeneration System for Condominiums Based on a Field Survey," Energies, MDPI, vol. 14(20), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:20:p:6611-:d:655575
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    References listed on IDEAS

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    1. Pellegrino, Sandro & Lanzini, Andrea & Leone, Pierluigi, 2015. "Techno-economic and policy requirements for the market-entry of the fuel cell micro-CHP system in the residential sector," Applied Energy, Elsevier, vol. 143(C), pages 370-382.
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