A Review on Thermophysical Property Researches for Low-GWP Olefin Refrigerants

Abstract

Among several low-GWP refrigerants, R1234yf, R1234ze(E) ，R1234ze(Z) ，HFO-1243zf，R1224yd(Z) ，R1233zd(E) ，R1336mzz(E) ，R1336mzz(Z) and HFO-1123 were intensively reviewed in the present work. These refrigerants are candidates to be used in more efficient refrigerators, air conditioners, high temperature heatpumps and ORC systems to conserve energy resources. Since large numbers of studies on their thermophysical properties have been conducted for more than ten years, thermodynamic equations of state for them were developed and installed in the latest version of REFPROP（ver. 10.0). In the present work,literature data available at present were discussed by tabulating and compared with those equations of state.