Experimental performance of moderate and high temperature heat pump charged with refrigerant mixture BY-3

Abstract

Theoretical and experimental analysis of a new refrigerant mixture BY-3 was conducted based on a singlestage vapor compression refrigeration system. The water-water heat pump system used BY-3 to produce hot water when the low temperature was 20 °C. The following results were obtained: the highest temperature at the condenser outlet reached about 85 °C; when the difference between the water temperatures at the condenser outlet and the evaporator inlet was less than 40 °C, the coefficient of performance (COP) was larger than 4; when the difference reached 55 °C, the COP still kept 3; the discharge temperature of BY-3 was lower than 100 °C, and the refrigerant vapor pressure kept lower than 1.8 MPa. When the water temperature at the condenser outlet reached over 85 °C, nearly a 5 °C superheating temperature was maintained.

Keywords

moderate and high temperature heat pump / refrigerant mixture / single-stage / compression heat pump system / coefficient of performance

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