Thermodynamic properties of HFC32-HFC134a binary system.


The authors discussed the development of equation of state for a binary mixture refrigerant from the equations of state for both constituent refrigerant. They have developed 18-coefficient modified Benedict-Webb-Rubin equations of state for R134a (1,1,1,2-tetrafluoroethane), R123 (1,1-dichloro-2,2,2-trifluoroethane), and R32 (difluoromethane), respectively. The Van der Waals mixing rule has been applied on the 2nd virial coefficients of the equations of state for R32 and R134a and a linear mixing rule on the other coefficients. The thermodynamic properties of R32-R134a in superheated vapor phase and two phase region at any composition could be calculated from the developed equations. The thermodynamic properties and pressure-enthalpy diagram for a R32-R134 binary system with 30-70% by weight are also included in the paper.


  • Original title: Thermodynamic properties of HFC32-HFC134a binary system.
  • Record ID : 1995-0717
  • Languages: English
  • Source: Proceedings of the 1994 International Refrigeration Conference at Purdue.
  • Publication date: 1994/07/19
  • Document available for consultation in the library of the IIR headquarters only.


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