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Effet d'une huile PAG sur la tension superficielle du R134a à saturation.

Effect of a PAG oil on the surface tension of R134a at saturation.

Numéro : pap. ID: 218

Auteurs : TAKAISHI Y., SATO T.

Résumé

The surface tension of refrigerant is one of the most important properties that govern the heat transfer in boiling and condensation processes. The present paper reports measurements on how a PAG oil changes the surface tension of R134a. The surface tension of R134a-PAG oil system was measured with the ring method. Measurements were conducted for a temperature of 278.15 K and relatively low oil-concentrations up to 32 mass% while the refrigerant containing the oil was kept at saturated conditions. The overall uncertainty in surface tension was estimated to be less than about ±5%. The present results demonstrate that the PAG oil mixed into R134a once decreases the surface tension by about 10% to that of R134a at lower oil concentrations up to 16% and increases it again at larger oil concentrations.

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Pages : 6 p.

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Détails

  • Titre original : Effect of a PAG oil on the surface tension of R134a at saturation.
  • Identifiant de la fiche : 30002258
  • 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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