Measurements of the surface tension for R290, R600a and R290/R600a mixture

Katsuyuki Tanaka, Yukihiro Higashi

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The surface tensions of R290, R600a and R290/R600a mixture have been measured by the modified differential capillary-rise method. Twenty-two data points for R290 and 21 data points for R600a were obtained in the temperature range between 273 K and 354 K, and 43 data points for R290/R600a mixture on three isotherms of 278 K, 300 K 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-1, respectively. Surface tension correlations as a function of temperature for pure R290 and R600a were formulated in the temperature range between 253 K and critical temperature, and the correlation as a function of the composition for R290/R600a mixture was discussed at 278 K, 300 K and 320 K. It is found that the surface tension for R290/R600a mixture can be reproduced by the simple mixing rule by mole fraction with the correlations of both pure components.

Original languageEnglish
Pages (from-to)1368-1373
Number of pages6
JournalInternational Journal of Refrigeration
Volume30
Issue number8
DOIs
Publication statusPublished - Dec 1 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Building and Construction
  • Mechanical Engineering

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