VISCOSITY AND THERMAL CONDUCTIVITY OF REFRIGERANTS R125/R134a MIXTURE

Equations describing viscosity and thermal conductivity experimental data of refrigerants R125/R134a mixture are compiled. Coefficients are determined by the least square technique. Equations represent refrigerants mixture viscosity and thermal conductivity dependence from temperature, density and composition. Providing possibility to calculate mixture viscosity at temperature ranging 298…423 К at a pressure up to 6,0 MPa at subcritical and 248…345 К up to 2,8 МPа at supercritical densities. Thermal conductivity is described at temperature ranging 298…423 К up to 6,0 MPa at subcritical and 232…323 К up to 20 МPа at supercritical densities. Standard and maximum deviations of the experimental values from calculated do not exceed 3,1% and 5,3% for viscosity and 2,2% and 5,0% for thermal conductivity.