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Document IIF

Nouvelle équation d'état du troisième degré pour les calculs en froid.

A new three-parameter cubic equation of state for refrigeration engineering calculations.

Auteurs : ZHANG H. L., SATO H., WATANABE K.

Type d'article : Article, Article de la RIF

Résumé

A new three-parameter cubic equation of state is proposed in which the repulsion pressure term of the semiempirical van der Waals equation has been modified based on the hard-sphere potential and a functional form similar to Redlich-Kwong attraction term is adopted for the attraction term. All three parameters are treated as functions of temperature. For the purpose of examining the applicability of the new equation, it was applied to describe the thermodynamic properties of difluoromethane (R32) and pentafluoroethane (R125). It has been found that the essential thermodynamic properties are represented by the new equation as accurately as a conventional far-complicated modified Benedict-Webb-Rubin equation in the working range of refrigeration equipment. The new cubic equation was also compared with the Peng-Robinson equation and the Carnahan-Starling-de Santis equation.

Documents disponibles

Format PDF

Pages : 421-440

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : A new three-parameter cubic equation of state for refrigeration engineering calculations.
  • Identifiant de la fiche : 1998-1538
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 20 - n. 6
  • Date d'édition : 09/1997

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