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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Theoretical Study on the Performance in a Solar-Geothermal Hybrid R22 Heat Pump During Winter Season according to Heat Source Temperature

열원의 온도변화에 따른 겨울철 태양열-지열 하이브리드 R22 열펌프의 성능에 관한 해석적 연구

  • Kang, Byun (Graduate of Mechanical Engineering, Chosun University) ;
  • Cho, Honghyun (Department of Mechanical Engineering, Chosun University)
  • 강변 (조선대학교 기계공학과) ;
  • 조홍현 (조선대학교 기계공학과)
  • Received : 2012.10.12
  • Accepted : 2012.11.16
  • Published : 2012.12.01
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Abstract

The Solar and geothermal energy have many advantage like low cost, non-toxic, and unlimited. But those the have very low energy efficiency. In this study, the theoretical study of performance in a sola-geothermal hybrid heat pump with operating conditions has carried out. As a result, as the solar radiation increases from 1 $MJ/m^2$ to 20 $MJ/m^2$, the heat pump operating time decreases by 19.5% from 18 times to 14.5 times and the heat pump heat decreases by 23%. Besides, the heating COP increases by 21.4% when the evaporator inlet temperature increases from $11^{\circ}C$ to $19^{\circ}C$. By adapting the geothermal system into a solar hybrid R22 heat pump, the system performance and reliability increases significantly for variable operating conditions during winter season.

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