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Document IIF

Formulation des propriétés thermodynamiques de l'air humide et d'autres mélanges de gaz contenant de l'eau, de 173 à 673 K et à des pressions jusqu'à 5 MPa.

Formulation for thermodynamic properties of moist air and other moisture containing gas mixtures from 173 K to 673 K, at pressures to 5 MPa.

Auteurs : ONISTCHENKO V. P., CHUMAK L. G., DERGACHEVA V. A.

Résumé

Moist air and gas mixtures containing nitrogen, oxygen, argon, carbon dioxide and water vapour are considered as working mediums for the chamber where food raw materials are frozen and stored, for the processes of industrial drying at room and higher temperatures, etc. To solve the problem of composition variation of these mixtures, the authors used virial equation of state. Virial coefficients are calculated for the Lennard-Jones potential with parameters that depend on temperature. Only temperature dependence of the saturated water vapour pressure over pure water and ice and the temperature dependence of the Lennard-Jones parameters were treated semi-empirically. The parameters were determined from experimental data on thermodynamic properties of the components within the limits of both virial equation of state and thermodynamic perturbation theory.

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Détails

  • Titre original : Formulation for thermodynamic properties of moist air and other moisture containing gas mixtures from 173 K to 673 K, at pressures to 5 MPa.
  • Identifiant de la fiche : 2000-1165
  • Langues : Anglais
  • Source : 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Date d'édition : 19/09/1999

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