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Document IIF

L'absorption du CO2 (R744) dans l'huile de lubrification.

Absorption of CO2 (R744) in lubricant oil.

Numéro : pap. ID: 157

Auteurs : MARCELINO NETO M. A., BARBOSA J. R. Jr

Résumé

The purpose of this work is to study the absorption of R744 through the free surface of a stagnant layer of polyol ester lubricant oil in a closed system (PVT cell) via the pressure decay method. The system pressure and local temperatures were recorded as a function of time for temperatures of approximately 25, 40, 55 and 70°C. The mass of R744 that entered the cell was measured at each experimental test. The data were used to validate a transient mass diffusion model that takes into account the departure from the ideal behavior. The model uses the PC-SAFT equation of state of Gross and Sadowski (2001) and incorporates the following effects: (i) gas compressibility in the vapour phase, (ii) liquid phase swelling, (iii) concentration-dependent non-ideal density behaviour, (iv) non-ideal phase equilibrium at the vapor-liquid interface and (v) concentration-dependent mass diffusivity. The absolute average errors of the absolute pressure predictions were lower than 5%.

Documents disponibles

Format PDF

Pages : 8 p.

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 : Absorption of CO2 (R744) in lubricant oil.
  • Identifiant de la fiche : 30001579
  • Langues : Anglais
  • Source : Proceedings of the 23rd IIR International Congress of Refrigeration: Prague, Czech Republic, August 21-26, 2011. Overarching theme: Refrigeration for Sustainable Development.
  • Date d'édition : 21/08/2011

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