Measurements of the vapour-liquid coexistence curve in the critical region and of the critical parameters for several alternative refrigerants

Shigeo Kuwabara, Haruki Sato, Koichi Watanabe

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Abstract

The critical temperatures and densities have been determined by visual observation of the disappearance of the meniscus at the vapour-liquid coexistence for the seven alternative refrigerants; HFC-32, HCFC-123, HFC-125, HFC-134, HFC-134a, HCFC-142b, and HFC-152a. In addition to the original data for HFC-32 and HFC-125 reported in this paper, the data of HCFC-123, HFC-134, HFC-134a, HCFC-142b, and HFC-152a which have already been published in previous papers are also included, but with reassessed values for the critical temperature as a result of converting from the IPTS-68 into the ITS-90. A nondimensionalised correlation for the vapour-liquid coexistence curve of each alternative refrigerant was also developed.

Original languageEnglish
Pages (from-to)35-40
Number of pages6
JournalHigh Temperatures - High Pressures
Volume26
Issue number1
Publication statusPublished - 1994 Dec 1

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ASJC Scopus subject areas

  • Condensed Matter Physics
  • Mechanics of Materials
  • Physical and Theoretical Chemistry

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