Journal of the Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회논문집)

Korean Society for Geothermal and Hydrothermal Energy (한국지열·수열에너지학회)
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Heating Performance of Heat Pump System Using Dual Heat Source and Its Operation Characteristics

이중 열원 히트펌프 시스템의 난방 성능과 운전 특성

  • Lim, Hyojae (Geothermal Energy Education Center, Hoseo University) ;
  • Sohn, Byonghu (Korea Institute of Civil Engineering and Building Technology(KICT))
  • 임효재 (호서대학교 지열인력양성센터) ;
  • 손병후 (한국건설기술연구원 녹색건축연구센터)
  • Received : 2021.05.02
  • Accepted : 2021.05.19
  • Published : 2021.06.01
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Abstract

This paper presents the heating performance analysis results of a heat pump system using a dual heat source. In this paper, a dual heat source refers to the ground-coupled heat exchanger using both a surface water heat exchanger (SWHE) and a vertical ground heat exchanger (VGHE). In order to evaluate the system performance, we installed a monitoring system to measure the temperature and power consumption of a heat pump and then collected operation data with 4 different load burdened ratios of the dual heat source heat exchanger. During the whole measurement period, the average heating capacity of a water-to-water heat pump unit was 37.3 kW. In addition, the compressor of the heat pump consumed 9.4 kW of power, while the circulating pump of the dual heat source heat exchanger used 6.7 kW of power. Therefore the average heating coefficient of performance (COP) for the heat pump unit was 4.0, while the entire system including the circulating pump was 2.7. Finally, the parallel use of SWHE and VGHE was beneficial to the system performance; however, further researches are needed to optimize the design data for various load ratios of the dual heat source heat exchanger.

Keywords

Acknowledgement

이번 논문은 과학기술정보통신부의 2020년도 재원으로 한국건설기술연구원 주요사업(20200057)에서 수행한 결과입니다. 아울러 논문의 일부 내용은 산업통상자원부의 재원으로 한국에너지기술평가원의 지원을 받아 수행한 연구(20143030110010) 결과입니다.

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