Partager

Document IIF

Caractéristiques du transfert de chaleur et de la chute de pression en ébullition libre d'un mélange R-410A/huile à l'intérieur d'un tube droit lisse et horizontal.

Heat transfer and pressure drop characteristics of R-410A/oil mixture flow boiling in a horizontal straight smooth tube.

Auteurs : HU H., DING G. L., WEI W. J., et al.

Résumé

Experimental studies of local heat transfer coefficients and pressure drops of R-410A/oil mixture flow boiling in a horizontal straight smooth tube are performed. The inside and outside diameters of the test tube are 7.0 and 6.34 mm, respectively. Experimental parameters include evaporating temperature of 5°C, mass flux from 200 to 400 kg/(m2.s), heat flux from 7.56 to 15.1 kW/m2, inlet vapour quality from 0.2 to 0.7, nominal inlet oil concentration from 0 to 5%. The flow patterns are observed through the sight glasses at the entrance and exit of the test section, and the effect of oil on flow patterns is discussed. The effects of oil on heat transfer and pressure drop characteristics are analysed. New correlations for predicting local heat transfer coefficients and frictional pressure drops of R-410A/oil mixture flow boiling inside the horizontal straight smooth tube are developed based on the mixture properties and the experimental data. These correlations can agree with the experimental data well.

Documents disponibles

Format PDF

Pages : ICR07-B1-347

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 : Heat transfer and pressure drop characteristics of R-410A/oil mixture flow boiling in a horizontal straight smooth tube.
  • Identifiant de la fiche : 2007-2508
  • Langues : Anglais
  • Source : ICR 2007. Refrigeration Creates the Future. Proceedings of the 22nd IIR International Congress of Refrigeration.
  • Date d'édition : 21/08/2007

Liens


Voir d'autres communications du même compte rendu (839)
Voir le compte rendu de la conférence

Indexation