Gas Transport Coefficients of Light Hydrocarbons. Halogenated Methane and Ethane as Candidates for New Refrigerants

Abstract

Abstract In previous work, we have correlated the dilute gas transport properties of alternative refrigerant mixtures. The purpose of this theoretical study was to obtain, using two-iterative inversion of the corresponding states of viscosity, effective and isotropic pair potential energies for a group of refrigerants: methane, ethane, propane, butane, R22, R123, R124, R134a, R152a, R32, and R143a. Employing the inverted pair potential energies, the Chapman–Enskog scheme could be used reasonably well to reproduce transport properties, except the thermal conductivity. The thermal conductivity was determined using the Huber scheme, wherein the use of the inverted pair potential energies is discussed at length. In the wide temperature range of 200K<T<1000K, the accuracies of the calculated viscosities, self-diffusion coefficients, and thermal conductivities were 2%, 4%, and 8% (at most 10%), respectively.