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Une équation d’état correspondante pour la capacité thermique isochore du liquide comprimé de frigorigènes purs et de leurs mélanges.

A corresponding state equation for compressed liquid isochoric heat capacity of pure and mixture refrigerants.

Auteurs : SHENG B., ZHAO Y., DONG X., YAN H., ZHONG Q., WANG J., SHEN J., GONG M.

Type d'article : Article de la RIF

Résumé

This work proposed a simple corresponding state equation depending on reduced temperature to predict compressed liquid isochoric heat capacity (cv) for HCs, HCFCs, HFCs and HFOs pure and mixtures at 0.3 < Tr < 1 and 0.5 < pr < 10. The generalized constant coefficients A and B were determined by regression of 1738 experimental cv data for 16 refrigerants including HCs, HFCs, HCFCs and HFOs in compressed liquid states (ρ > 2ρc). With known critical parameters, acentric factor and ideal gas isochoric heat capacity, the developed equation can represent the compressed liquid cv well with the average absolute relative deviation (AARD) of 1.82%. Compared with the generalized equation of Zhong et al. (2019a) and the special multiproperty equations in REFPROP 10.0 software, the proposed equation is slightly poor in accuracy, but simpler in form and requires fewer parameters. In addition, liquid cv data of 13 pure and 9 mixtures were used to verify the prediction performance of the developed equation and the applicability to the mixtures. The equation in this work is in good agreement with the experiment cv data of 9 pure and 9 mixtures including HCs, HFCs, HCFCs and HFOs, but the large deviation for 4 substances (N2, CO2, H2O and CH3OH).

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Format PDF

Pages : 20-29

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Détails

  • Titre original : A corresponding state equation for compressed liquid isochoric heat capacity of pure and mixture refrigerants.
  • Identifiant de la fiche : 30028179
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 124
  • Date d'édition : 04/2021
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2020.12.016
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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