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.
|Number of pages||12|
|Journal||International Journal of Thermophysics|
|Publication status||Published - 1999 Jan 1|
|Event||Proceedings of the 1997 13th Symposium Thermophysical Properties in Honor of Ared Cezairliyan - Boulder, CO, USA|
Duration: 1997 Jun 22 → 1997 Jun 27
ASJC Scopus subject areas
- Condensed Matter Physics