ISSN:
1572-9567
Keywords:
halogenated ethane
;
HCFC-123
;
HCFC-141b
;
HFC-134a
;
thermal conductivity
;
transient hot-wire method
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract The gaseous thermal conductivity of three CFC alternatives, HFC-134a (1,1,1,2-tetrafluoroethane), HCFC-123 (1,1-dichloro-2,2,2-trifluoroethane), and HCFC-141b (1,1-dichloro-1-fluoroethane), has been measured in the temperature ranges 273–363 K (HFC-134a) and 313–373 K (HCFC-123, HCFC-141b) at pressures up to saturation. The measurements were performed with a new improved transient hot-wire apparatus. The uncertainty of the experimental data is estimated to be within 1%. The gaseous thermal conductivity obtained in this work together with the liquid thermal-conductivity data from the literature were correlated with temperature and density by an empirical equation based on the excess thermal-conductivity concept. The equation is found to represent the experimental results with average deviations of 2.5 % for HFC-134a, 0.75% for HCFC-123, and 0.55% for HCFC-141b, respectively.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00522663
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