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Vapour-liquid equilibrium of ternary mixtures of the refrigerants R125, R143a and R134a.

Author(s) : NAGEL M., BIER K.

Type of article: Article, IJR article

Summary

Apart from ternary mixtures of R32 with R125 and R134a, similar mixtures with R143a instead of R32 are discussed as alternatives to the widely used refrigerants R22 and R502. In this work, the phase equilibrium of such ternary mixtures is described by simple cubic equations of state which are based only on experimental data for the pure substances and for a nearly equimolar mixture of every binary system. In addition to previous experimental investigations the critical properties and the saturation pressure were measured for pure R143a and for nearly equimolar mixtures of the binary systems R143a/R134a and R125/R143a. The temperature ranged from -70 deg C up to the respective critical point. The validity of the resulting equations of state for ternary mixtures of R125, R143a and R134a is confirmed by comparison with experimental results of the vapour-liquid equilibrium for a mixture with about 17 mol% of R125 and R143a, respectively, and about 66 mol% of R134a.

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Pages: 264-271

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Details

  • Original title: Vapour-liquid equilibrium of ternary mixtures of the refrigerants R125, R143a and R134a.
  • Record ID : 1998-0797
  • Languages: English
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 19 - n. 4
  • Publication date: 1996/05

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