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R515A (also known as Honeywell Solstice R515A) is an azeotropic mixture consisting of 88 weight% R1234ZE and 12% R227EA that is considered to be a replacement fluid for R134a.  It has a molar mass of 118.73 kg/kmol.  


Property data for R515A are provided using a generalized equation of state fitted by F-Chart Software using thermodynamic property data provided by the Honeywell Genetron Properties program (Ver. 1.4)  ( and REFPROPThe model is applicable for temperatures between 170 K and 420 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 property data are provided using correlations to the data provided in the Honeywell Genetron Properties program. 


Fluid Property Information