A RELATIONSHIP BETWEEN DYNAMIC VISCOSITY AND REDUCED TEMPERATURE OF REFRIGERANT FLUIDS AND THEIR MIXTURES IN THE LIQUID-PHASE

A prediction method relating dynamic viscosity with reduced temperatur e is proposed in this paper for pure and mixed refrigerant fluids in t he liquid state along the saturation line. The validity of the method is checked by comparison with dynamic viscosity data available in lite rature. Comparison results are reported for many halocarbon refrigeran ts and for bis(difluoromethyl)ether (RE134) as well. Some experimental data for azeotropic and non-azeotropic binary mixtures have also been compared with the dynamic viscosity predicted with the present method and a simple mixing rule. The results of the comparisons give average absolute deviations and maximum absolute deviations compatible with e ngineering applications.