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Prediction of vapour-liquid equilibria of refrigerant mixtures by a cubic group-contribution equation of state.

Author(s) : BAROLO M., BERTUCCO A., SCALABRIN G.

Summary

The paper is a contribution to the development of a model for the prediction of the thermodynamic behaviour of refrigerant mixtures, for which experimental data are not always available. The model is based on a modified Redlich-Kwong-Soave equation of state, with mixing rules as proposed by Huron and Vidal. The calculation of the attractive parameter is based on infinite-dilution activity coefficients at infinite pressure according to Soave et al. The group-contribution of a UNIFAC-like model are regressed from experimental infinite-dilution activity coefficients of binary mixtures containing CFCs, HCFCs, HFCs and FCs. As a result, only pure-component structure, critical constants and vapour pressure are needed to calculate thermodynamic properties of mixtures. The aim of the work is to test the ability of the proposed model on the prediction of the vapor-liquid equilibria of the above mixtures over the full composition range at low and moderate pressure.

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Pages: 501-508

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Details

  • Original title: Prediction of vapour-liquid equilibria of refrigerant mixtures by a cubic group-contribution equation of state.
  • Record ID : 1995-1502
  • Languages: English
  • Source: CFCs, the Day After.
  • Publication date: 1994/09/21
  • Document available for consultation in the library of the IIR headquarters only.

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