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Document IIF

Viscosité de mélanges de HFC et d'esters de pentaérythritol.

Viscosity for mixtures of HFCs and pentaerythritol esters.

Auteurs : WAHLSTRÖM Å., VAMLING L.

Résumé

Pentaerythritol esters are suggested as likely alternatives for HFC compressor oils in heat pumps and refrigeration plants. The viscosities of mixtures of HFC-134a and HFC-125 in pentaerythritol tetrapentanoate and in pentaerythritol tetra-2-ethylhexanoate have been measured in the normal range of temperature and concentration with uncertainties of less than 4 and 2% respectively. The results are compared with a new simple predictive model. For mixtures of HFC with mass fractions of around 20% the model can predict viscosities with an uncertainty of less than 25% with the accuracy increasing for lower mass fractions.

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    20 €

  • Prix membre*

    Gratuit

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Détails

  • Titre original : Viscosity for mixtures of HFCs and pentaerythritol esters.
  • Identifiant de la fiche : 2000-1178
  • Langues : Anglais
  • Source : 20th International Congress of Refrigeration: Refrigeration into the Third Millennium.
  • Date d'édition : 19/09/1999

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