Dynamic Viscosity and Thermal Conductivity Prediction of Refrigerants and Refrigerant Mixtures

Prediction methods to evaluate liquid dynamic viscosity and thermal conductivity along the saturation line are presented in this paper for pure and mixed refrigerants. The thermal conductivity correlation presented here is an extension to the new refrigerants of an equation previously proposed by one of the authors. The viscosity correlation has been improved upon a previous version in order to make it a real predictive method. The accuracy of the two correlations is checked with the most recent experimental data available in literature. The absolute deviations between estimated and experimental data for pure fluids are general! y less than 5% (mean) and 10% (maximum) for the thermal conductivity correlation and are generally less than 6% (mean) and 13% (maximum) for viscosity. Both prediction methods are applied to refrigerant mixtures as well.