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Thermal Conductivity of Binary Refrigerant Mixtures of HFC-32/125 and HFC-32/134a in the Liquid Phase

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Abstract

The liquid thermal conductivity of mixtures of HFC-32/125 and HFC-32/134a was measured using the transient hot-wire apparatus in the temperature ranges from 213 to 293 K and from 193 to 313 K, respectively, in the pressure range from 2 to 30 MPa and with HFC-32 mass fractions of 0.249, 0.500, and 0.750 for each system. The uncertainty of the thermal conductivity was estimated to be ±0.7%. For practical applications, the thermal conductivity data for the two mixtures were represented by a polynomial in temperature, pressure, and mass fraction of HFC-32 with a standard deviation of 1.0%.

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Authors and Affiliations

  1. Department of System Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan

    X. Gao, Y. Nagasaka & A. Nagashima

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  1. X. Gao
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  2. Y. Nagasaka
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  3. A. Nagashima
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Gao, X., Nagasaka, Y. & Nagashima, A. Thermal Conductivity of Binary Refrigerant Mixtures of HFC-32/125 and HFC-32/134a in the Liquid Phase. International Journal of Thermophysics 20, 1403–1415 (1999). https://doi.org/10.1023/A:1021432920199

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  • DOI: https://doi.org/10.1023/A:1021432920199

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