Experimental study of thermal conductivity of refrigerant R-409А in vapor phase
O.I. Verba, E.P. Raschektaeva, S.V. Stankus
Kutateladze Institute of Thermophysics SB RAS stankus@itp.nsc.ru
Keywords: thermal conductivity, refrigerant R-409A, vapor phase
Pages: 661-664
Abstract
Thermal conductivity of refrigerant R-409A in vapor phase was studied in the range of temperatures 306-425 K and pressures 0.12−1.33 MPa. Measurements were performed with the stationary method of coaxial cylinders. Uncertainty of experimental data on thermal conductivity was 1.5−2.5 %, and errors of temperature and pressure measurements did not exceed 0.05 K and 4 kPa, respectively. Approximating dependence of thermal conductivity on pressure and temperature was obtained. Thermal conductivity on dew line and in ideal gas state was calculated.
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