Thermodynamic properties of refrigerants from SM sound velocity-based equation of state

The present work aims to predict thermodynamic properties of several refrigerants using the Song and Mason (SM) equation of state (EOS). The calculations of thermodynamic properties including enthalpy, entropy, internal energy, isobaric and isochoric heat capacities, and speed of sound of these fluids have been carried out along saturation curve and in the gas phase region. The accuracy of calculated saturated density of studied refrigerant fluids was of the order of ±3%. Generally, our calculations led to the overall average absolute deviation (AAD in %) of calculated internal energy, enthalpy, entropy, isobaric and isochoric heat capacities, and speed of sound equal to 0.62%, 0.58%, 0.53%, 1.4%, 1.06% and 0.48%, respectively. Also, our calculations on the enthalpy, entropy, isobaric and isochoric heat capacities, and speed of sound at compressed states led to the AADs equal to 1.00%, 0.53%, 1.42%, 1.62% and 0.55%, respectively.