A PREDICTION METHOD FOR THERMAL-CONDUCTIVITY OF ALTERNATIVE REFRIGERANTS IN THE LIQUID-PHASE

A prediction method for the thermal conductivity of halocarbon refrige rants in the saturated liquid stale in the reduced temperature range 0 .3 to well above 0.9 is presented in this paper. The aim of the method is to present a very simple calculation of the transport property use ful for engineering purposes. The method determines thermal conductivi ty as a sole function of the reduced temperature and requires the know ledge of a parameter dependent upon easily available physical constant s characteristic of each compound. The method is validated against exp erimental data available in the literature, giving average absolute de viations which are usually less than 5%, with maximum absolute deviati ons generally less than 10%. An extension of the method to estimate th ermal conductivity of binary mixtures is also presented, along with a comparison with the few experimental data available in the literature.