Liquid thermal conductivity of binary mixtures of pentafluoroethane (R125) and 1,1,1,2-tetrafluoroethane (R134a)

Journal Article · Fri Jan 01 00:00:00 EST 1999 · International Journal of Thermophysics

DOI:https://doi.org/10.1023/A:1021469928377· OSTI ID:345197

Jeong, S U; Kim, M S; Ro, S T ^[1]

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1. Seoul National Univ. (Korea, Republic of). Dept. of Mechanical Engineering

Thermal conductivities of zeotropic mixtures of R125 (CF{sub 3}CHF{sub 2}) and R134a (CF{sub 3}CH{sub 2}F) in the liquid phase are reported. Thermal conductivities have been measured by a transient hot-wire method with one bare platinum wire. Measurements have been carried out in the temperature range of 233 to 323 K and in the pressure range of 2 to 20 MPa. The dependence of thermal conductivity on temperature, pressure, and composition of the binary mixture is presented. Measured thermal conductivity data are correlated as a function of temperature, pressure, and overall composition of the mixture. The uncertainty of the measurements was estimated to be better than 2%.

• OSTI ID: 345197
• Report Number(s): CONF-970629-; ISSN 0195-928X; TRN: IM9922%%130
• Journal Information: International Journal of Thermophysics, Vol. 20, Issue 1; Conference: 13. symposium on thermophysical properties, Boulder, CO (United States), 22-27 Jun 1997; Other Information: PBD: Jan 1999
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
THERMAL CONDUCTIVITY
MIXTURES
MATERIAL SUBSTITUTION
REFRIGERANTS
HALOGENATED ALIPHATIC HYDROCARBONS
MEASURING METHODS
TEMPERATURE DEPENDENCE
PRESSURE DEPENDENCE