Calculation of Thermodynamic properties of R236ea, R245ca and R245fa

In this paper, we have used a simple equation of state to predict the volumetric and thermodynamic properties of liquid refrigerants. The thermodynamic properties such as density ρ, isobaric expansion coefficient α, and isothermal compressibility κ, for some refrigerants e.g. R236ea, R245ca, and R245fa, based on GMA EOS have been calculated and a wide comparison with experimental data was made. This article is devoted to the theoretical study of some thermodynamic properties of the liquid refrigerants over the temperature range between 240K and 440K and pressures up to 580 atm to indicate that the GMA EoS has an acceptable performance for property predictions of pure liquid refrigerants. Our calculated results on the density, isobaric expansion coefficient and isothermal compressibility for the liquid refrigerants are in good agreement with the experimental data. The accuracy of the equation of state is determined by a statistical parameter; Absolute Average Deviation ( AAD). The AAD values show that the GMA equation of state can predict the thermodynamic properties of the refrigerants in the range of temperature and pressure with high precision.