Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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A Study of Performance Characteristics on Hybrid Heat Pump System with Solar Energy as Heat Source

태양열이용 하이브리드 열펌프시스템의 성능특성에 관한 연구

  • Park, Youn-Cheol (Faculty of Mechanical Energy and System Engineering, Cheju National University) ;
  • Kim, Ji-Young (Department of Mechanical Engineering, Graduate School, Cheju National University) ;
  • Ko, Gwan-Soo (Department of Mechanical Engineering, Graduate School, Cheju National University)
  • 박윤철 (제주대학교 기계에너지시스템공학부) ;
  • 김지영 (제주대학교 대학원 기계공학과) ;
  • 고광수 (제주대학교 대학원 기계공학과)
  • Published : 2007.03.30
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Abstract

Interests on renewable energy are increased due to oil price and environmental problems aroused from the fossil energy usage. In this study, performances of a solar assisted hybrid heat pump system are analyzed by experimental method. The developed system could runs at two types of operating mode. When the storage temperature is higher than the set temperature, the stored hot water in storage tank is supplied to the load directly. On the other hand, when the storage temperature lower than the set temperature, the water inside of the storage tank is used as heat source of the heat pump. In this study, the system control temperature for the alternation of the operating mode is set to $40^{\circ}C$ of the storage tank outlet. As results, it is founded that the COP of the developed heat pump system shows between 3.0 and 3.5. It is resonable performance for the heating system with a renewable energy as secondary heat source. The solar collect used in this study could supplies heat to the storage tank at over 400 W/m2 solar intensity. If the irradiation is lower than the 400 W/m2, the circulation pump stored and it could not supply heat to the storage tank. It is found that the difference temperature between the outlet of the storage tank and collector is $3^{\circ}C$. Even though, the extended study should be conducted to get a optimum performance of the developed system with various operating condition and control strategies.

Keywords

References

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