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이영수(Y. S. Lee),김종률(J. R. Kim),나호상(H. S. Ra) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
It is required that various kinds of unused energy from urban area and industrial sectors be recovered and re-utilized from the viewpoints of energy saving and environmental conservation. Since most of this heat demand is low temperature below 60℃, the utilization of unused energy is surely one of very effective measures to both environmental preservation and energy conservation. Unused energy is implicated as temperature difference energy available from water-heat sources for heat pump including river, sewage arid sea. The present study has been conducted to develop a heat pump system using fiver as a heat sink.
하천수 열원이용 2단압축 열펌프시스템의 최적 중간압에 대한 실험
김종률(J. R. Kim),이영수(Y. S. Lee),나호상(H. S. Ra) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.11
The inter-stage pressure for two-stage vapor compression cycle is commonly taken as the geometric mean of the refrigerant evaporation and condensation pressure, which is only applicable for a perfect gas with complete inter-cooling between the stages. However, when the flash inter-cooler is incorporated, there is considerable difference between the geometric mean and the optimal pressure value. In this paper, experimental investigation for the optimum performance of HFC-134a multi-stage heat pump system was conducted to suggest optimal inter-stage pressure.