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R454A (also known as Opteon XL40) is a zeotropic mixture consisting of 35 weight% R32 and 65% R1234yf.  It is considered to be a replacement fluid for R404A. It has a molar mass of 80.47 kg/kmol.  


Thermodynamic data for R454A are provided using a generalized equation of state fitted by F-Chart Software using thermodynamic property data provided by the REFPROP 10 program.   The reference state for enthalpy and entropy is the IIR recommendation in which the specific enthalpy and entropy of saturated liquid are 200 kJ/kg and 1.0 kJ/kg-K, respectively.  The model is applicable for temperatures between 190 K and 410 K with pressures up to 20 MPa.  


Viscosity and thermal conductivity are provided based on data from the manufacturer for temperatures between 230 K and 410 K.



Fluid Property Information