Experimental studies on the VLE of R-32/R-125 and verification of experimental setup

Alternative refrigerants for R410A, which is most commonly used in building cooling and heating, are being requested with a global warming potential of 750 or lower and these regulations will continue to be implemented. At the current stage, several candidates are being discussed, but these will not be the final solution. What is certain is the R410A replacement refrigerant will be proposed in the form of mixed refrigerants. To figure out the thermodynamic properties of the mixed refrigerant, VLE data must be obtained first. In this study, we performed VLE experiments on a representative mixed refrigerant (R32-R125) to verify our newly constructed VLE experiment facility, and compared the results with the REFPROP 10 and the results of other researchers. The experiment was conducted at a temperature of 273.15 K to 313.15 K, and the maximum MAPE for pressure was found to be 0.0178 % and the maximum MAE for composition was found to be 0.0029. In the future, the facility will be used to present VLE test data with new mixed refrigerants as candidate replacement refrigerants for R410A.