R477A
R477A is a zeotropic mixture consisting of 84 weight% propylene and 16% isobutane. It is an A3 refrigerant (flammable). It can be considered as a replacement for R-404A and R-407C. It has a molar mass of 44.02 kg/kmol with a GWP of 1320.
Property data for R477A are provided using a Helmholtz mixture model fitted by F-Chart Software using thermodynamic property data generated by REFPROP. The model is applicable for temperatures between 180 K and 570 K with pressures up to 20 MPa or reduced densities up to 3.0. The reference state is saturated liquid at 0 C for which specific enthalpy and entropy are 200 kJ/kg and 1.0 kJ/kg-K, respectively.
Transport properties are estimated using a corresponding states approach as suggested in:
Klein, S.A., McLinden, M.O., and Laesecke , A., "An improved extended corresponding states method for estimation of viscosity of pure refrigerants and mixtures", Int. J. of Refrigeration, 20, pp. 208-217, 1997
McLinden et al., "An extended corresponding states model for the thermal conductivity of refrigerants and refrigerant mixtures", Int. J. of Refrigeration, 23, pp. 43-63, 2000