Condensation heat transfer of a heat pump system using the refrigerant mixture R-32/R-134a

A typical heat pump system was constructed and experiments were carried out to analyze the cycle performance and heat transfer characteristics of the system using various refrigerants. This paper includes the results of experiments using a refrigerant mixture of R-32/R 134a, and the results are then compared with those of R-22. The experiments are mainly focused on the condensation heat transfer in the heat pump test rig where water is used as a secondary fluid.