R444B
R444B (also known as Soltice L20) is a zeotropic mixture consisting of 48.5 weight% R1234ze(E), 41.5% R32, and 10% R152A. It is considered to be a replacement fluid for R22. It has a molar mass of 72.76 kg/kmol.
Property data are provided using a pseudo-pure generalized equation of state fitted by F-Chart Software using thermodynamic property data generated by REFPROP. The model is applicable for temperatures between 180 K and 430 K with reduced densities up to 3. 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