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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Analysis of Performance Changes in Ground source Heat Pump and Air Source Heat Pump According to Global Warming

지구온난화에 따른 지열히트펌프와 공기열히트펌프의 성능 변화 분석

  • Jin Yeong Seo (Department of Mechanical and Information Engineering, University of Seoul) ;
  • Se Hyeon Ham (Department of Mechanical Engineering, Korea University) ;
  • Dongchan Lee (Department of Mechanical and Information Engineering, University of Seoul)
  • 서진영 (서울시립대학교 기계정보공학과) ;
  • 함세현 (고려대학교 기계공학과) ;
  • 이동찬 (서울시립대학교 기계정보공학과)
  • Received : 2023.08.27
  • Accepted : 2023.11.04
  • Published : 2023.12.01
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Abstract

The air temperature is gradually increasing owing to global warming, especially in summer, therefore, the performance of an air source heat pump (ASHP) is expected to be decreased. Accordingly, the performance gap between the ASHP and ground source heat pump (GSHP) should be increased, however, the quantitative comparison has not been yet investigated. In this study, impact of global warming on the performance of the ASHP and GSHP is investigated based on the climate data for 1930, 1980, and 2030. The coefficient of performance (COP) as well as annual power consumption of the ASHP and GSHP are compared and analyzed. In the case of COP, the COP of GSHP hardly changes over the years owing to the constant ground temperature, while that of ASHP decreases by 3.7% for cooling and increases by 0.71% for heating. In the case of annual power consumption, the cooling and heating power consumption of GSHP increases by 12.69% and decreases by 15.58%, respectively, over the year owing to the changes in heating and cooling loads. As for the ASHP, the cooling and heating power consumption increases by 16.64% and decreases by 17.8%, respectively. For a more accurate comparison, power consumption ratio is introduced and shows that total annual power consumption of the GSHP to ASHP decreased from 68% in 1930 to 65% in 2030. Therefore, as global warming accelerates, the effect of reducing power consumption by using GSHP compared to ASHP is expected to be increasing.

Keywords

Acknowledgement

본 논문은 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임(NRF-2022R1A4A5018891).

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