Experimental Assessment on Performance of a Heat Pump Cycle Using R32/R1234yf and R744/R32/R1234yf

摘要

This study measures the COPs of R744/R32/R1234yf and R32/R1234yf with GWPs of approximately 300 and 200 under two heating modes in experimentally and analytically, where the heat sink water change temperature 10 K and 25 K. In experiment, COP of Ternary 300 and Binary 300 are comparable to that of R410A. In analysis, COP of Ternary 300, Binary 300 and Binary 200 are higher than that of R410A. Even if temperature glide of zeotropic mixture equal to water temperature change in the heat exchanger, irreversible loss in heat exchanger increases because of lower heat transfer performance of heat exchanger. COP of Ternary 300, Binary 300 and Binary 200 are higher than that of R410A in experiment if compressor is improved and the diameter of connecting pipe and heat exchanger is increased.