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Extension de la méthode des courbes implicite pour le calcul rapide des propriétés des frigorigènes dans la région supercritique.

Extension of the implicit curve-fitting method for fast calculation of thermodynamic properties of refrigerants in supercritical region.

Auteurs : ZHAO D., DING G., WU Z.

Type d'article : Article, Article de la RIF

Résumé

The implicit curve-fitting method has been used for fast and stable calculations of thermodynamic properties of subcritical refrigerants, and it has to use the saturated liquid or vapour state as the reference state. In order to extend the application range of this method in supercritical region, an isothermal state in the supercritical region is used as the reference state, and the implicit equations for supercritical refrigerants in this state and out of this state are established, respectively. The new calculation method can be used in the entire supercritical region. With the new method, thermodynamic properties of supercritical CO2 and R410A are predicted and compared with REFPROP 8. It shows that the total mean relative deviations of the fast calculation formulae from REFPROP 8 are less than 1%, while the mean calculation speeds of the fast calculation formulae are more than 100 times faster than those of REFPROP 8.

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Format PDF

Pages : pp. 1615-1625

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Détails

  • Titre original : Extension of the implicit curve-fitting method for fast calculation of thermodynamic properties of refrigerants in supercritical region.
  • Identifiant de la fiche : 2009-1892
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 32 - n. 7
  • Date d'édition : 11/2009

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