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R469A (also known as WT69) is a zeotropic mixture consisting of 35 weight% carbon dioxide, 32.5% R32 and 32.5% R125. It is considered to be a replacement fluid for R23 for low temperature refrigeration down to -70 C. It has a molar mass of 59.145 kg/kmol.
Property data for469A are provided using a generalized equation of state fitted by F-Chart Software using thermodynamic property data from the manufacturer and generated by REFPROP. The model is applicable for temperatures between 180 K and 630 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. Viscosity, thermal conductivity and surface tension data were fit to data obtained from REFPROP.
Fluid Property Information