Geometric volume and new refrigerants—I. Halomethanes

Abstract

Geometric volume has been used for correlating ten molecular and thermodynamic properties of a particular category of halomethane refrigerants. The properties have been selected such that their conformity to certain specified norms qualify a compound as a good refrigerant. Based on the developed correlations, these properties have been predicted for the entire range of halomethanes belonging to the same category. A number of new halomethanes have emerged as potentially capable refrigerants. Existing refrigerants are mostly low geometric volume compounds. However, for some of the properties, namely, critical volume, critical density, density of saturated vapour pressure at boiling point and thermal conductivity, higher geometric volume compounds are as efficient as the lower volume members.