PREDICTION OF VOLUMETRIC AND THERMODYNAMIC PROPERTIES OF REFRIGERANTS- A SIMPLIFIED PROCEDURE

Prediction of volumetric and thermodynamic data for some refrigerants using their boiling points, and possibly also their critical propertie s as the basic input data, has been attempted using corresponding stat es and some established equations for various properties for a variety of fluids. The properties predicted include vapour pressure, vapour a nd liquid specific volumes, liquid and vapour heat capacities and late nt heat of vaporization. The usefulness of this method has been exempl ified with an analysis of an ideal Rankine refrigeration cycle. The de rived cycle data for this comparative analysis were calculated both fr om predicted thermodynamic data following the procedure evolved in thi s analysis and from published data. The agreement between the two meth ods is within 5% for HFC134a and CFC12.