Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Simulation Analysis on Performance Comparison between R744 and R22 Solar Hybrid Heat Pump

R744와 R22를 적용한 태양열 하이브리드 열펌프의 성능 시뮬레이션 비교 분석

  • Kang, Byun (Dept. of Mechanical Eng., Graduate School, Chosun Universiy) ;
  • Cho, Honghyun (Dept. of Mechanical Eng., Chosun University)
  • 강변 (조선대학교 대학원 기계공학과) ;
  • 조홍현 (조선대학교 기계공학과)
  • Received : 2012.09.13
  • Accepted : 2012.12.12
  • Published : 2013.04.30
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Abstract

Simulation study of a solar hybrid heat pump using R744 and R22 for residential applications was carried out according to heat pump operating temperature, outdoor temperature and solar radiation. As a result, when the heat pump operating temperature increases from $40^{\circ}C$ to $48^{\circ}C$, the COP of a R744 and R22 heat pump system decrease from 2.15 to 1.7 and from 3.09 to 2.69, respectively. Besides, as the outdoor temperature rises from $3^{\circ}C$ to $11^{\circ}C$, the COP of R744 and R22 heat pump system increase from 1.73 to 2.12 and from 2.73 to 3.02. When the solar radiation increases from 10 to 20 $MJ/m^2$, the collector operating time and collector efficiency of R744 heat pump increase 10.3 times and 50.7%, respectively. The performance of R744 solar hybird heat pump is more sensitive to operation condition compared to that of R22. Besides, the solar heating system is more effective to the R744 heat pump system.

Keywords

References

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