Abstract
Bubble-point pressures and saturated-liquid densities of the binary R-135 (pentafuoroethane) + 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. and density measurements and the composition determination were estimated to be within ±15 mK, ±13 k Pa, ±0.2%, and ±0.1 wt%, respectively. The purities of the samples used throughout the measurements are 99.98 wt% for R-125 and 99.0 mol % for R- 143a. Based on the present data, the thermodynamic behavior of the vapor-liquid equilibria of this binary refrigerant mixture has been evaluated by using the Peng-Robinson equation for the bubble-point pressures, and the modified Hankinson-Brobst-Thomson equation for the saturated-liquid densities. This was done to identify the optimized binary interaction parameters.
Original language | English |
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Pages (from-to) | 801-810 |
Number of pages | 10 |
Journal | International Journal of Thermophysics |
Volume | 16 |
Issue number | 3 |
DOIs | |
Publication status | Published - 1995 May 1 |
Keywords
- alternative refrigerants
- binary mixtures
- bubble-point pressure
- saturated-liquid density
- vapor-liquid equilibria
ASJC Scopus subject areas
- Condensed Matter Physics