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  • Articles  (3)
  • vapor pressure  (2)
  • R134a  (1)
  • 1990-1994  (3)
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  • Articles  (3)
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  • 1
    Electronic Resource
    Electronic Resource
    Vapor pressure of difluoromethane (HFC-32) (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 1221-1227 
    Details
    ISSN: 1572-9567
    Keywords: Burnett apparatus ; HFC-32 ; refrigerants ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A slightly modified Burnett apparatus has been used to measure 32 vapor-pressure data for HFC-32 in the temperature range from 273.39 to 347.29 K. The uncertainties of temperature and pressure are estimated to be within ±10 mK and ±500 Pa, respectively. The purity of the sample used in this work is 99.95%. On the basis of our data and of data from the literature, a vapor-pressure equation for HFC-32 is also proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00503684
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Sound velocity and ideal-gas specific heat of gaseous 1,1,1,2-tetrafluoroethane (R134a) (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 1039-1050 
    Details
    ISSN: 1572-9567
    Keywords: acoustic interferometer ; 1,1,1,2 tetraflouroethane ; R134a ; sound velocity ; specific heat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A cylindrical, variable-path acoustic interferometer operating at 156.252kHz is developed for determining ideal-gas specific heats. Results of validation measurements with argon are very satisfactory, with the maximum deviation of the speed of sound equal to 3×10−4. The sound velocity of gaseous R134a has been measured at low temperatures and low pressures. The specific heat was then calculated from the results. The experimental results corrected for various dispersions for the sound velocity of gaseous R134a match well with an earlier publication, with a room mean square deviation of 2.56×10−4. A new relation for the ideal-gas specific heat as a function of temperature for R134a is obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00505674
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Vapor pressure of difluoromethane (HFC-32) (1993)
    Springer
    International journal of thermophysics 14 (1993), S. 1221-1227 
    Details
    ISSN: 1572-9567
    Keywords: Burnett apparatus ; HFC-32 ; refrigerants ; vapor pressure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract A slightly modified Burnett apparatus has been used to measure 32 vapor-pressure data for HFC-32 in the temperature range from 273.39 to 347.29 K. The uncertainties of temperature and pressure are estimated to be within ±10 mK and ±500 Pa, respectively. The purity of the sample used in this work is 99.95%. On the basis of our data and of data from the literature, a vapor-pressure equation for HFC-32 is also proposed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02431286
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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