Prediction of the Thermal Conductivity of Pure Refrigerants Through an Extended Corresponding States Model

An accurate evaluation of the thennophysical properties of refiigerants over wide ranges of pressure and temperature is necessary to predict the performance of possible alternatives to fully halogenated chlorofluorocarbons in refrigeration and heat pumping applications. The transport properties have, in fact, a very important part in the refrigeration plant heat exchangers design. An Extended Corresponding States (ECS) model for the prediction of the thennodynamic properties of pure and mixed hydrocarbons was presented and more recently an implementation of ECS was proposed for the prediction of the transport properties of halocarbon refrigerants, integrating in it the former ECS thermodynamic model. In the meantime the data availability ofboth thermodynamic and transport properties of the alternative fluorocarbons has greatly increased. A parallel validation of the two integrated model is here developed for five HCF fluids. Considering the predictive nature of the model and the scattering of the experimental data, the mean accuracy is good and satisfactory for the technical application requirements.