Bubble-point pressures and saturated- and compressed-liquid densities of the binary R-125 + R-143a system

T. Fujimine, H. Sato, K. Watanabe

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

Bubble-point pressures and saturated- and compressed-liquid densities of the binary R-125 (pentafluoroethane) + R-143a (1,1,1-trifluoroethane) system have been measured for several compositions at temperatures from 280 to 330 K by means of a magnetic densimeter coupled with a variable-volume cell mounted with a metallic bellows. The experimental uncertainties of the temperature, pressure, density, and composition were estimated to be within ±10 mK, ±12 kPa, ±0.2%, and ±0.2 mass%, respectively. The purities of the samples used throughout the measurements are 99.96 area% for R-125 and 99.94 area% for R-143a. Based on these measurements, the thermodynamic behavior of the vapor-liquid equilibria of this binary refrigerant mixture has been represented using the Peng-Robinson equation for the bubble-point pressures, a correlation for the saturated-liquid densities, and an equation of state for the compressed-liquid densities.

Original languageEnglish
Pages (from-to)911-922
Number of pages12
JournalInternational Journal of Thermophysics
Volume20
Issue number3
Publication statusPublished - 1999 May

Fingerprint

Density of liquids
bubbles
liquids
Bellows
Refrigerants
Chemical analysis
Equations of state
bellows
densimeters
Phase equilibria
refrigerants
liquid-vapor equilibrium
Thermodynamics
Temperature
purity
equations of state
thermodynamics
temperature
cells

ASJC Scopus subject areas

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

Cite this

Bubble-point pressures and saturated- and compressed-liquid densities of the binary R-125 + R-143a system. / Fujimine, T.; Sato, H.; Watanabe, K.

In: International Journal of Thermophysics, Vol. 20, No. 3, 05.1999, p. 911-922.

Research output: Contribution to journalArticle

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