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R454C (also known as Opteon XL20) is a zeotropic mixture consisting of 21.5 weight% R32 and 78.5% R1234yf.  It is considered to be a replacement fluid for R404A. It has a molar mass of 90.8 kg/kmol.  


Thermodynamic and transport property data for R454C are provided using a generalized equation of state fitted by F-Chart Software using thermodynamic property data provided by the STIEBEL ELTRON GMBH & Co and REFPROP.   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 200 K and 450 K with pressures up to 50 MPa.  



Fluid Property Information