Transport Properties of Refrigerants.

Heat Transfer Coefficients and Transport Properties for Alternative Refrigerants

Practical and empirical equations of transport properties have been developed for refrigerant compounds. These equations have been used to develop correlations for experimental heat transfer coefficient (IITC) for both evaporation and condensation in smooth tubes. Model calculations have been compared with recent experimental data, and reasonable agreement has been obtained. INTRODUCTION We hav...

Thermodynamic Properties of Muiticomponent Refrigerants

In recent years, increasing attention has been focused on the use ofhalogenated hydrocarbon mixtures as working fluids in vapor compressionrefrigeration systems, e.g. heat pumps. This paper discusses phase rules,applied to the equilibrium of the vapor and liquid states of such mixtures.Mixtures of ideal behavior, those that obey Raoult's law, and those withdeviations from th...

Thermophysical Properties of Some Selected Alternative Refrigerants

A summary of a thermophysical properties program for six candidate alternative. refrigerants is given. This work has been performed recently at the National Institute of Standards and Technology (U.S.A.), Thermophysics Division, in Gaithersburg, Maryland. Properties measured include gas and liquid·phase PVT, vapo~ pressures, surface tension, index of ~efraction, dielect~ie eons~ant, gas phase s...

Prediction of Thermodynamic Properties of Refrigerants in the Superheated Ragion

This paper demonstrates the capabilities of the PFGC-MES equation of state (EOS) for calculating the thermodynamic properties in the superheated region for pure refrigerants. In addition the ability of this EOS is also tested for predicting the VLE behavior of binary mixtures. For pure compounds several properties in the superheated region are predicted. The calculated results and the experimen...

A new methodology for the determination of transport properties of refrigerants