Contents - Index



R423A is a blend of  R134a and R227ea with mass percentages of  52.5%  and 47.5%, respectively. Properties for this near-azeotropic blend have been fitted to Martin-Hou equation of state (A.I.Ch.E. Journal, 1:142, 1955) as modified for blends by Bivens and Yokozeki (1996 Intl. Conference on Ozone Protection Technologies, Washington, DC) based on data provided in the DuPont ISCEON 9 Series bulletin entitled "Thermodynamic Properties of DuPont ISCEON 39&C (R-423A)".


Blends do not necessarily remain at constant temperature during constant pressure evaporation or condensation.   EES will return the bubble point temperature as the temperature corresponding to saturation at x=0 and the dew point temperature corresponding to saturation at x=1 at a specified pressure.  


Note that the property correlations for this fluid are approximate.  If high accuracy is required, it is recommended that the user refer to the NIST REFPROP program for property data.


Transport data for this fluid are currently not provided.



Fluid Property Information