Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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A Study of Load Matching on the Net-Zero Energy House

넷 제로에너지주택의 부하매칭에 관한 연구

  • Kim, Beob-Jeon (Department of Architectural Engineering, Graduate School, Daejeon University) ;
  • Lim, Hee-Won (Department of Architectural Engineering, Graduate School, Daejeon University) ;
  • Kim, Deok-Sung (Solar Tech CO.,LTD) ;
  • Shin, U-Cheul (Department of Architectural Engineering, Daejeon University)
  • 김법전 (대전대학교 대학원 건축공학과) ;
  • 임희원 (대전대학교 대학원 건축공학과) ;
  • 김덕성 (쏠라테크(주)) ;
  • 신우철 (대전대학교 건축공학과)
  • Received : 2018.06.12
  • Accepted : 2018.07.10
  • Published : 2018.08.30
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Abstract

nZEH (net-Zero Energy House) is defined as a self-sufficient energy building where the sum of energy output generated from new & renewable energy system and annual energy consumption is zero. The electricity generated by new & renewable energy system with the form of distributed generation is preferentially supplied to electrical demand, and surplus electricity is transmitted back to grid. Due to the recent expansion of houses with photovoltaic system and the nZEH mandatory by 2025, the rapid increase of distributed generation is expected. Which means, we must prepare for an electricity-power accident and stable electricity supply. Also electricity charges have to be reduce and the grid-connected should be operated efficiently. The introduction of ESS is suggested as a solution, so the analysis of the load matching and grid interaction is required to optimize ESS design. This study analyzed the load matching and grid interaction by expected consumption behavior using actual data measured in one-minute intervals. The experiment was conducted in three nZEH with photovoltaic system, called all-electric houses. LCF (Load Cover Factor), SCF (Supply Cover Factor) and $f_{grid}$ (Grid Interaction Index) were evaluated as an analysis indicator. As a result, LCF, SCF and $f_{grid}$ of A house were 0.25, 0.23 and 0.27 respectively; That of B house were 0.23, 0.23, 0.19, and that of C were 0.20, 0.19, 0.27 respectively.

Keywords

References

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  1. Self-Sufficiency and Energy Savings of Renewable Thermal Energy Systems for an Energy-Sharing Community vol.14, pp.14, 2018, https://doi.org/10.3390/en14144284