Summary
Ternary mixtures of R32, R125 and R134a of different compositions are recommended for replacing refrigerants R22 and R502. As a prerequisite for reliably calculating vapour pressure and phase equilibria of ternary mixtures within the relevant range of temperature and composition, VLE data of the three binary systems R32-R134a, R125-R134a and R32-R125 bave been measured from, -70 deg C up to the critical temperature. The real mixing behaviour of these binary systems is described by simple cubic equations of state, based only on precise experimental data of the critical properties and one value of the vapour pressure at T/T(c) about 0.7 for one mixture of nearly equimolar composition, respectively. Besides the properties of the pure substances, these data are sufficient to calculate the saturation pressure as well as the composition of the coexisting phases with rather high accuracy for both the binary and the ternary mixtures. This bas been proved by comparison with experimental data for binary mixtures and for three ternary mixtures of different compositions.
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Details
- Original title: Vapour-liquid equilibrium of ternary mixtures of the refrigerants R32, R125 and R134a.
- Record ID : 1997-1999
- Languages: English
- Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 18 - n. 8
- Publication date: 1995/11
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Indexing
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Themes:
HFCs;
Blends - Keywords: R134a; Liquid-vapour; R32; R125; Ternary mixture; Equation of state; Refrigerant
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Experimental results for the VLE of the ternary...
- Author(s) : KLEEMISS M., BAEHR H. D.
- Date : 1995/08/20
- Languages : English
- Source: For a Better Quality of Life. 19th International Congress of Refrigeration.
- Formats : PDF
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Vapour-liquid equilibrium of R134a, R125 and R3...
- Author(s) : KLEEMISS M., BAEHR H. D.
- Date : 1994/11/16
- Languages : German
- Source: DKV-Tagungsbericht 1994 Bonn.
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Vapour-liquid equilibrium of ternary mixtures f...
- Author(s) : NAGEL M., SCHNEIDER J., BIER K.
- Date : 1994/11/16
- Languages : German
- Source: DKV-Tagungsbericht 1994 Bonn.
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Performance of refrigeration cycle with R32-R13...
- Author(s) : SEKI M., OSAJIMA A., NAKANE Y., et al.
- Date : 1994/07/19
- Languages : English
- Source: Proceedings of the 1994 International Refrigeration Conference at Purdue.
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The use of a modified Huron-Vidal (MHV-2) equat...
- Author(s) : MORRISON J. D., BARLEY M. H., MURPHY F. T., PARKER I. B., WHEELHOUSE F. T.
- Date : 1994/09/21
- Languages : English
- Source: CFCs, the Day After.
- Formats : PDF
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