Thermodynamic property representation for the R-32/125 binary system by a new cubic equation of state

H. L. Zhang, H. Sato, K. Watanabe

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Thermodynamic properties of the R-32/125 binary system are modeled by a new cubic equation of state which was developed and applied to the pure R-32 and R-125 in a previous paper by the present authors. The essential thermodynamic properties such as PVTx properties, vapor-liquid equilibrium, enthalpy, entropy, isobaric specific heat, and speed of sound are well represented by the new model simultaneously for the liquid phase, the gas phase, and the two-phase region of the R-32/125 binary system. The developed model is valid for the entire range of compositions, and a pressure-enthalpy diagram for a R-32/125 mixture with 50 mass% of R-32 is illustrated as an example. The new model was also compared with other reported models in refrigeration cycle calculations.

Original languageEnglish
Pages (from-to)441-451
Number of pages11
JournalInternational Journal of Refrigeration
Issue number6
Publication statusPublished - 1997 Jan 1



  • Alternative refrigerant
  • Cubic equation
  • Mixture model
  • R-32/125
  • Thermodynamic properties

ASJC Scopus subject areas

  • Building and Construction
  • Mechanical Engineering

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