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Caractéristiques de la chute de pression lors de l'ébullition en écoulement d'un mélange de R410A-huile dans des petits tubes lisses.

Pressure drop characteristics of R410A-oil mixture flow boiling in small smooth tubes.

Auteurs : GAO Y., DENG B., DING G., et al.

Résumé

This study presents experimental frictional pressure drop for R410A-oil mixture flow boiling in small horizontal smooth tubes with outside diameters of 5.0 and 3.0 mm. Experimental conditions cover nominal concentrations from 0 to 5%. The test results show that the presence of oil enhances two-phase frictional pressure drop about 0-120 and 0-90% at present conditions for 5.0 and 3.0 mm smooth tubes, respectively, and the enhanced effect is more evident at higher vapour qualities where the local oil concentrations are higher. A new correlation to predict the local frictional pressure drop of R410A-oil mixture flow boiling inside conventional size and small smooth tubes is developed based on local properties of refrigerant-oil mixture, and the experimental data of 5.0 and 3.0 mm smooth tubes and that of 7.0 mm smooth tube (Hu et al., 2008) are well correlated with the new correlation.

Documents disponibles

Format PDF

Pages : pp. 75-80

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Pressure drop characteristics of R410A-oil mixture flow boiling in small smooth tubes.
  • Identifiant de la fiche : 2010-0727
  • Langues : Anglais
  • Source : ACRA-2009. The proceedings of the 4th Asian conference on refrigeration and air conditioning: May 20-22, 2009, Taipei, R.O.C.
  • Date d'édition : 20/05/2009

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