Bubble-point pressures and liquid densities of mixtures blended with difluoromethane, pentafluoroethane, and 1,1,1-trifluoroethane
Measurements of the bubble-point pressures and the liquid densities of the binary difluoromethane + 1,1,1-trifluoroethane (R-32 + R-143a) and the ternary difluoromethane + pentafluoroethane + 1,1,1-trifluoroethane (R-32 + R-125 + R-143a) refrigerant mixtures at temperatures from 280 to 320 K in 10 K intervals are reported. The experimental apparatus used in the measurement is a magnetic densimeter coupled with a variable volume cell. The estimated uncertainties are {plus{underscore}minus}12 mK in temperature, {plus{underscore}minus}10 kPa in pressure, and {plus{underscore}minus}0.2% in density, whereas the uncertainty in the determined composition of mixture is estimated to be {plus{underscore}minus}0.3 mass %. On the basis of the measured bubble-point pressures, the optimization of the binary interaction parameter of the Peng-Robinson equation, which reproduces the available data within {plus{underscore}minus}1%, is discussed. Empirical correlations for the saturated-liquid and compressed-liquid densities of mixture composed of R-32, R-125, and R-143a with an accuracy within {plus{underscore}minus}0.3% are also developed.
- Research Organization:
- Keio Univ., Yokohama (JP)
- OSTI ID:
- 20003910
- Journal Information:
- Journal of Chemical and Engineering Data, Vol. 44, Issue 6; Other Information: PBD: Nov-Dec 1999; ISSN 0021-9568
- Country of Publication:
- United States
- Language:
- English
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