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Vapour-liquid equilibrium study of an absorption working fluid of HFC-134a + DMF.

Author(s) : CUI X., CHEN G., LI C., et al.

Summary

The mixture of 1,1,1,2-tetrafluoroethane (HFC-134a) + N, N-dimethyl formamide (DMF) is considered as a promising new working fluid for absorption refrigeration. In this paper, the solubility of HFC-134a in DMF was measured from T= (283.15 to 363.15) K with a circulation-type equilibrium apparatus. The experimental data were correlated by Peng-Robinson-Stryjek-Vera equation of state using the Wong-Sandler mixing rule and LCVM mixing rule with NRTL model. The overall deviations of the pressure were 1.36 and 1.69% for WS mixing rule and LCVM mixing rule, respectively. The results show that both models have a good agreement with the experimental data. It is shown that the mixture has a large negative deviation from Raoult's law. The vapour liquid equilibrium characteristics of the mixture are expressed in a log p-1/T diagram and pressure-composition diagram for use in the analysis of an absorption refrigeration system.

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Pages: ICR07-B1-129

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Details

  • Original title: Vapour-liquid equilibrium study of an absorption working fluid of HFC-134a + DMF.
  • Record ID : 2008-0168
  • Languages: English
  • Source: ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Publication date: 2007/07/21

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