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Modélisation de la viscosité des mélanges frigorigène/lubrifiant.

Viscosity modeling of refrigerant/lubricant mixtures.

Auteurs : MICHELS H. H., SIENEL T. H.

Résumé

Viscosity is the most important factor to consider in choosing a lubricant; a small quantity of refrigerant dissolved in a lubricant can cause a significant reduction in mixture viscosity. In contrast to gas phase mixtures, the theory for predicting the viscosity of liquid mixtures is not well developed. Several liquid mixture models have been proposed that partially account for both molecular size and differences in the Gibbs energy of activation between like and unlike molecular interactions. Most of these models have been implemented, in a practical sense, to include only binary interactions. They are also often unreliable in either the refrigerant rich or lubricant rich mixtures regions. To correct for these deficiencies, a new model, similar to the Wohl n-suffix expansion for non-ideal liquid mixtures has been developed. Comparisons of this new model with several other viscosity models for mixtures, such as those proposed by Kendall, Grunberg-Nissan, and Yokozeki, have been made.

Détails

  • Titre original : Viscosity modeling of refrigerant/lubricant mixtures.
  • Identifiant de la fiche : 1998-3355
  • Langues : Anglais
  • Source : International Conference on Ozone Protection Technologies. Conference proceedings.
  • Date d'édition : 12/11/1997
  • Document disponible en consultation à la bibliothèque du siège de l'IIF uniquement.

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