Evaluation of the Effect of Combination of a Hybrid Water Heater and a Storage Battery System in Self Consumption of Photovoltaic Power Generation

DOI

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Other Title
  • ハイブリッド給湯機と蓄電池システムによる太陽光発電の自家消費利用の連携効果の検証

Abstract

In order to expand the use of renewable energy, a shift from "selling" to "self-consuming" of surplus electric energy generated by photovoltaic power generation (PV) is necessary. As for the means of the self-consumption, water heater with a hot water tank, which can store energy at relatively low cost as hot water, is attracting attention. Hybrid water heater, that has both an electric heat pump and a gas heat source, stores hot water to a relatively small tank compared to a simple electric heat pump water heater at less electric energy. Since it also has a gas heat source, there is no need to worry about running out of hot water even with a small tank. By combining a hybrid water heater and a storage battery system, an improvement of self power consumption ratio of PV energy is expected compared to the stand-alone usage of a hybrid water heater. This article reports the improvement result in an actual house. The self-consumption of PV energy used at the hybrid water heater was improved by 11.6 % in winter, 23.8 % in mid seasons, and 4.9 % in summer. Then the CO2 emission is reduced by 33 % a year.

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Details 詳細情報について

  • CRID
    1390576194084893568
  • DOI
    10.24778/jjser.44.1_39
  • ISSN
    24330531
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Disallowed

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