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Measurements of the surface tension for R-290, R-600a and R-290/R-600a mixture.

Author(s) : TANAKA K., HIGASHI Y.

Type of article: Article, IJR article

Summary

The surface tensions of R-290, R-600a and R-290/R-600a mixture have been measured by the modified differential capillary-rise method. Twenty-two data points for R-290 and 21 data points for R-600a were obtained in the temperature range between 273 and 354 K, and 43 data points for R-290/R-600a mixture on three isotherms of 278, 300 and 320 K were obtained. The experimental uncertainties of temperature and surface tension are estimated to be within 20 mK and 0.2 mN/m, respectively. Surface tension correlations as a function of temperature for pure R-290 and R-600a were formulated in the temperature range between 253 K and critical temperature, and the correlation as a function of the composition for R-290/R-600a mixture was discussed at 278, 300 and 320 K. It is found that the surface tension for R-290/R-600a mixture can be reproduced by the simple mixing rule by mole fraction with the correlations of both pure components.

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Pages: 1368-1373

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Details

  • Original title: Measurements of the surface tension for R-290, R-600a and R-290/R-600a mixture.
  • Record ID : 2008-0059
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 30 - n. 8
  • Publication date: 2007/12

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