Operation method for self-consumption of surplus power considering thermal comfort in a zero energy house

Yugo Tsuneoka*, Yuka Maruyama, Tianshu Xu, Maho Ichikawa, Junta Fujisawa, Shin Ichi Tanabe, Yasuhiro Hayashi

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Future declines in the selling price of surplus electric power, and the cost of PV systems and storage batteries are expected. Autonomous operations like self-consumption of surplus electric power may, therefore, become cost-effective. In addition, self-consumption may reduce excessive power backflow, which can reduce the power generation efficiency in cities. Both energy savings and improvements to thermal comfort are important to support the spread of zero energy houses (ZEH). This study aims to understand the utility of autonomous operations. Through measurements and simulations, we show that thermal comfort is improved, and peak load reduced by precooling. In addition, we show that using a heat pump water heater during the day is efficient. We proposed different combinations of PV systems and storage capacity for different regions and household composition and confirmed their economic efficiency. Finally, we confirmed the possibility that using surplus electric power can improve quality of life during low load periods.

Original languageEnglish
Title of host publication15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018
PublisherInternational Society of Indoor Air Quality and Climate
ISBN (Electronic)9781713826514
Publication statusPublished - 2018
Event15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018 - Philadelphia, United States
Duration: 2018 Jul 222018 Jul 27

Publication series

Name15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018

Conference

Conference15th Conference of the International Society of Indoor Air Quality and Climate, INDOOR AIR 2018
Country/TerritoryUnited States
CityPhiladelphia
Period18/7/2218/7/27

Keywords

  • Heat pump water heater(EC)
  • PV generation self-consumption
  • Precooling
  • Storage battery(BT)
  • Thermal comfort
  • Zero energy house(ZEH)

ASJC Scopus subject areas

  • Pollution

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