Thermal Conductivity of Mixed Refrigerants R-125/R-134A and R-32/R-125

The results of measurements of the thermal conductivity carried out in a gas phase for six binary mixed refrigerants, consisting of hydrofluorocarbons R-125, R-134a, and R32, are analyzed. For each mixture, an equation is given for calculating its thermal conductivity depending on temperature and pressure. The previously proposed model for predicting the thermal conductivity of vapors of mixed refrigerants in a wide range of state parameters has been refined in application to the R-125/R-134a and R32/R-125 systems.