Thermal Conductivity of Ternary Refrigerant Mixtures of HFC-32/125/134a in the Liquid Phase |
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Authors: | X Gao Y Nagasaka A Nagashima |
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Affiliation: | (1) Department of System Design Engineering, Keio University, 3-14-1 Hiyoshi, Yokohama, 223-8522, Japan |
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Abstract: | The liquid thermal conductivity of two ternary mixtures of HFC-32/125/134a (23.0/25.0/52.0 and 19.0/43.8/37.2 wt%) was measured using a transient hot-wire instrument in the temperature ranges from 193 to 293 K and from 213 to 293 K, respectively, and in the pressure range from 2 to 30 MPa. The thermal conductivity has an estimated uncertainty of ±0.7%. For engineering purposes, the thermal conductivity data were correlated using a polynomial in temperature and pressure for each mixture with a standard deviation of 0.6%. |
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Keywords: | HFC-32/125/134a refrigerant R-407C ternary mixture thermal conductivity transient hot-wire method |
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