Equation of state for hydrofluorocarbon refrigerant mixtures of HFC-125/143a, HFC-125/134a, HFC-134a/143a and HFC-125/134a/143a

J. Li, R. Tillner-Roth, H. Sato, K. Watanabe

Research output: Contribution to journalConference article

9 Citations (Scopus)


Equations of state (EOSs) in the form of dimensionless Helmholtz free energy have been developed for the binary hydrofluorocarbon (HFC) refrigerant mixtures HFC-125/143a, HFC-125/134a, HFC-134a/143a and for the ternary refrigerant mixture HFC-125/134a/143a in the present work. These EOSs are effective in the temperature and pressure ranges where the experimental measurements covered, i.e., 200 K ≤ T ≤ 413 K, P ≤ 35 MPa for HFC-125/143a and HFC-125/134a; 243 K ≤ T ≤ 413 K, P ≤ 17 MPa for HFC-134a/143a and HFC-125/134a/143a. Experimental measurements in both single-phase and two-phase regions are represented by the present EOSs within their estimated uncertainties.

Original languageEnglish
Pages (from-to)225-239
Number of pages15
JournalFluid Phase Equilibria
Issue number2
Publication statusPublished - 1999 Jul 24
EventProceedings of the 1998 5th Asian Thermophysical Properties Conference - Seoul, S Kor
Duration: 1998 Aug 31998 Sep 2



  • Equation of state
  • HFC-125
  • HFC-134a
  • HFC-143a
  • Helmholtz free energy
  • Hydrofluorocarbon
  • Mixture

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

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