Experimental surface tensions for HFC-32, HCFC-124, HFC-125, HCFC-141b,HCFC-142b,and HFC-152a |
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| Authors: | M Okada Y Higashi |
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| Affiliation: | (1) Department of Mechanical Engineering, Tsukuba College of Technology, 4-3-15, Amakubo, 3115 Tsukuba, Japan;(2) Department of Mechanical Engineering, Iwaki Meisei University, 5-5-1 Iino, Chuodai, 970 Iwaki, Fukushima, Japan |
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| Abstract: | The surface tension of six alternative refrigerants, i.e., HFC-32 (CH, F, ). HCFC-124 (CHClFCF,), HFC-125 (CHF2CF3). HCFC-14lb ICH,CCI,F). HCFC-142b (CH3CCIF2), and HFC-152a (CH3CHF2), has been measured in the present study. The measurements were conducted under equilibrium conditions between the liquid and its saturated vapor. The differential capillary-rise method (DORM) used two glass capillaries, with inner radii of 0.3034 ± 0.0002 and 0.5717 ±0.0002 mm, respectively. Temperatures in the range from 270 to 340 K were considered. The accuracy of surface tension measurements is estimated to be within ±0.2 mN · m–1. The temperatures are accurate to within ±20 mK. The temperature dependence of the resultant data were successfully represented by van der Waals' correlations to within ±(1.1 mN m–1 for each substance. Available surface tension data are compared with the present data.Paper presented at the Twelfth Symposium on Thermophysical Properties, June 19–24, 1994, Boulder, Colorado, U.S.A. |
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| Keywords: | differential capillary-rise method HFC-32 HCFC-124 HFC-125 HCFC-141b HCFC-1426 HFC-152a refrigerants surface tension |
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