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  • 1,1,1,2-tetrafluoroethane (R134a)  (2)
  • 1, 1-dichloro-2, 2, 2-trifluoroethane  (1)
  • 1
    Electronic Resource
    Electronic Resource
    The vapor pressure of 1,1,1,2-tetrafluoroethane (R134a) and chlorodifluoromethane (R22) (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 837-854 
    Details
    ISSN: 1572-9567
    Keywords: Burnett apparatus ; chlorodifluoromethane (R22) ; ebulliometry ; refrigerants ; 1,1,1,2-tetrafluoroethane (R134a) ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We measured the vapor pressure of chlorodifluoromethane (commonly known as R22) at temperatures between 217.1 and 248.5 K and of 1,1,1,2-tetrafluoroethane (commonly known as R134a) in the temperature range 214.4 to 264.7 K using a comparative ebulliometer. For 1,1,1,2-tetrafluoroethane at pressures between 220.8 and 1017.7kPa (corresponding to temperatures in the range 265.6 to 313.2K), additional measurements were made with a Burnett apparatus. We have combined our results for 1,1,1,2-tetrafluoroethane with those already published from this laboratory at higher pressures to obtain a smoothing equation for the vapor pressure from 215 K to the critical temperature. For chlorodifluoromethane our results have been combined with certain published results to provide an equation for the vapor pressure at temperatures from 217 K to the critical temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503911
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  • 2
    Electronic Resource
    Electronic Resource
    The vapor pressure of 1, 1-dichloro-2, 2, 2-trifluoroethane (R123) (1992)
    Springer
    International journal of thermophysics 13 (1992), S. 999-1009 
    Details
    ISSN: 1572-9567
    Keywords: 1, 1-dichloro-2, 2, 2-trifluoroethane ; ebulliometry ; R123 ; refrigerant ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The vapor pressure of 1, 1-dichloro-2, 2, 2-trifluoroethane (R123) has been measured at temperatures between 256.4 and 453.8 K by ebulliometric and static techniques. These results have been combined to obtain a correlation for the vapor pressure from 256.4 K to the critical temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01141211
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  • 3
    Electronic Resource
    Electronic Resource
    Design of a high-pressure ebulliometer, with vapor-liquid equilibrium results for the systems CHF2 Cl + CF3 CH3 and CF3 CH2 F + CH2F2 (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 873-888 
    Details
    ISSN: 1572-9567
    Keywords: activity coefficients ; chlorodilluoromethane (R22) ; difluoromethane (R32) ; ebulliometry ; phase equilibriun ; refrigerant mixtures ; 1,1,1-trifluoroethane (R143a) ; 1,1,1,2-tetrafluoroethane (R134a)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We describe the design and operation of a new high-pressure metal ebulliometer which can operate at pressures to at least 3 MPa in the range 220–400 K. Infinite-dilution activity coefficients are presented for the system CHF2Cl + CF3-CH, at 275 K and for the system CF3-CH2F + CH2F2, at 260, 230, and 300 K. The Wilson activity coellicient model and a virial coefficient model are applied to these systems, and the phase equilibrium conditions are calculated. The results are shown to agree well with predicted and with published measured values. The excess enthalpy is calculated and compared with results from a Peng Robinson equation of state. Vapor densities on the dew curves are given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01439194
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