R473A
R473A is a zeotropic mixture consisting of 60 weight% Carbon dioxide, 20% R1132(A), 10% R23 and 10% R125. It is an A1 refrigerant with a low GWP. It is a low temperature refrigerant designed as a replacement for R23 and R508A/B. It has a molar mass of 52.58 kg/kmol
Property data for R473A are provided using a Helmholtz mixture model fitted by F-Chart Software using thermodynamic property data provided by the manufacturer (Koura Klea 473A) and generated by {html=REFPROP. The model is applicable for temperatures between 190K and 600 K with pressures up to 20 MPa. 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