Modeling the viscosity of refrigerants with a thermodynamic mode

A viscosity model based on the Heyen equation of state has been applied to refrigerants. Firstly, pure refrigerants are selected and the pure-component coefficients of the model are then fitted. Then binary mixtures are used to fit the binary interaction parameters of the model. The obtained binary interaction parameters and pure-component coefficients are used to predict the viscosity of a ternary mixture. The results prove that deviations are generally low for all analyzed compounds and mixtures. This model does not need the density, which is one of its main advantages.

Keywords:

Refrigerants , Equation of state , Viscosity , Heyen , Mixtures