### 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 language | English |
---|---|

Pages (from-to) | 911-922 |

Number of pages | 12 |

Journal | International Journal of Thermophysics |

Volume | 20 |

Issue number | 3 |

Publication status | Published - 1999 May |

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### ASJC Scopus subject areas

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

### Cite this

*International Journal of Thermophysics*,

*20*(3), 911-922.

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

Research output: Contribution to journal › Article

*International Journal of Thermophysics*, vol. 20, no. 3, pp. 911-922.

}

TY - JOUR

T1 - Bubble-point pressures and saturated- and compressed-liquid densities of the binary R-125 + R-143a system

AU - Fujimine, T.

AU - Sato, H.

AU - Watanabe, K.

PY - 1999/5

Y1 - 1999/5

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0033131490&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0033131490&partnerID=8YFLogxK

M3 - Article

AN - SCOPUS:0033131490

VL - 20

SP - 911

EP - 922

JO - International Journal of Thermophysics

JF - International Journal of Thermophysics

SN - 0195-928X

IS - 3

ER -