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  • 1
    Electronic Resource
    Electronic Resource
    The thermal conductivity of binary mixtures of liquid R22 with R142b and R152a at low temperatures (1996)
    Springer
    International journal of thermophysics 17 (1996), S. 597-606 
    Details
    ISSN: 1572-9567
    Keywords: binary mixtures ; low temperatures refrigerants ; R22 ; R1426 ; R152a ; thermal conductivity ; transient method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The paper presents the thermal conductivity of mixtures of liquid refrigerants, The group of systems studied consists of two binary mixtures of R22/R142b and R22/R152a. The measurements have been carried out in the temperature range 160–300 K for pressures From 0.2 to 8.0 MPa in a transient coaxial-cylinder instrument. The uncertainty of the thermal conductivity data is estimated to be ±2%. The experimental method and apparatus were validated by using the measurements of refrigerant R22. The results presented have been used to develop a correlation for the description of the thermal conductivity of refrigerants.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441506
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Thermal conductivity of refrigerants R123, R134a, and R125 at low temperatures (1994)
    Springer
    International journal of thermophysics 15 (1994), S. 203-214 
    Details
    ISSN: 1572-9567
    Keywords: chloroffuorocarbons ; fluorocarbons ; isobaric heat capacity ; refrigerants ; R123 ; 11125 ; R134a ; saturated liquid ; thermal conductivity ; transient method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Using a transient coaxial cylinder technique, thermal conductivities were measured for liquid 1,1,1-trifluoro-2,2-dichloroethane (refrigerant R123), 1,1,1,2-tetrafluoroethane (refrigerant R134a). and pentalluoroethane (refrigerant R 125). The uncertainty of the experimental data is estimated to be within 2–3 %. Thermal conductivities of refrigerants were measured at temperatures ranging from −114 to 20°C under pressures up to IOMPa. The apparatus was calibrated with four kinds of liquids and gases. The features of the density dependence of thermal conductivity are indicated. Existing equations for calculating the coefficient are analyzed in cases where development has been sufficient to enable comparisons to be made with experiment. Saturated-liquid thermal conductivities for R134a and R123 are compared with corresponding experimental values.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01441582
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  • 3
    Electronic Resource
    Electronic Resource
    Thermal conductivity of difluoromonochloromethane in the critical region (1991)
    Springer
    International journal of thermophysics 12 (1991), S. 53-65 
    Details
    ISSN: 1572-9567
    Keywords: critical phenomena ; difluoromonochloromethane ; refrigerants ; R22 ; thermal conductivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The thermal conductivity of difluoromonochloromethane (refrigerant R22) has been measured along six near-critical isotherms at reduced temperatures varying from τ=1.005 to τ=1.112 and at pressures ranging from 2.0 to 9.5 MPa. An anomalous enhancement of the thermal conductivity has been observed in the critical region. This anomalous behavior is consistent with theoretical predictions and equations for the thermal conductivity as a function of density and temperature are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00506122
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    Paper (German National Licenses)
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