Measurements of PVTx properties of refrigerant mixture HFC-32 + HFC-125 in the gaseous phase

T. Sato, H. Kiyoura, H. Sato, K. Watanabe

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

The experimental 156 PVTx properties of an important binary refrigerant mixture, HFC-32 (difluoromethane) + HFC-125 (pentafluorethane), have been measured for three compositions, i.e., 50, 60, and 80 wt% HFC-32, by a constant-mass-method coupled with expansion procedure in an extensive range of temperatures T from 320 to 440 K, of pressures P from 1.8 to 5.3 MPa, and of densities ρ from 50 to 124 kg·m-3. The experimental uncertainties of the present measurements are estimated to be within ±7 mK in temperature. ±2 kPa in pressure. ±0.2% in density and ±0.02 wt% of HFC-32. The sample purities are 99.998 wt% for HFC-32 and 99.99 wt% for HFC-125. Seventy-eight second and third virial coefficients for temperatures from 320 to 440 K have been determined by the present measurements.

Original languageEnglish
Pages (from-to)43-54
Number of pages12
JournalInternational Journal of Thermophysics
Volume17
Issue number1
Publication statusPublished - 1996

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refrigerants
Refrigerants
virial coefficients
Temperature
temperature
purity
expansion
Chemical analysis
pentafluoroethane

Keywords

  • Alternative refrigerant
  • Binary refrigerant mixtures
  • HFC-32 + HFC-125 system
  • PVTx properties
  • Thermodynamic properties
  • Virial coefficients

ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes
  • Physical and Theoretical Chemistry
  • Computational Mechanics
  • Mechanics of Materials
  • Physics and Astronomy (miscellaneous)

Cite this

Measurements of PVTx properties of refrigerant mixture HFC-32 + HFC-125 in the gaseous phase. / Sato, T.; Kiyoura, H.; Sato, H.; Watanabe, K.

In: International Journal of Thermophysics, Vol. 17, No. 1, 1996, p. 43-54.

Research output: Contribution to journalArticle

Sato, T. ; Kiyoura, H. ; Sato, H. ; Watanabe, K. / Measurements of PVTx properties of refrigerant mixture HFC-32 + HFC-125 in the gaseous phase. In: International Journal of Thermophysics. 1996 ; Vol. 17, No. 1. pp. 43-54.
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