Precise Measurements of the Vapor-Liquid Equilibria (VLE) of HFC-32/134a Mixtures Using a New Apparatus

S. Shimawaki, K. Fujii, Y. Higashi

研究成果: Contribution to journalArticle査読

18 被引用数 (Scopus)

抄録

A new apparatus for precise measurements of the vapor-liquid equilibria of mixtures by the circulation method has been developed. This apparatus has two special components: a high-stability temperature control system and a helium pressurization system. The temperature in the liquid bath surrounding the sample cell is kept constant within ±0.5 mK. The helium pressurization system increases the pressure of the sampled mixture when measuring the compositions at low temperatures by gas chromatography. With these components, the uncertainty in measuring the vapor-liquid equilibria has been reduced. Using this apparatus, the vapor-liquid equilibria of HFC-32/134a mixtures were measured in a temperature range of 263.15 to 293.15 K. These results are in good agreement with the calculated results from REFPROP (Ver. 6.0.1) with a relative pressure difference of about 2%.

本文言語英語
ページ(範囲)801-808
ページ数8
ジャーナルInternational Journal of Thermophysics
23
3
DOI
出版ステータス出版済み - 5 2002
外部発表はい

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

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