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Visualisation de l’ébullition en écoulement du R410A sous des conditions diabatiques à l’intérieur de tubes ronds horizontaux.

Visualization of R410A flow boiling in diabatic conditions inside horizontal round tubes.

Numéro : pap. 2144

Auteurs : YANG C.-M., HRNJAK P.

Résumé

The objective of this paper is to present the mechanism of flow boiling in horizontal smooth and micro-finned tubes through visualization in diabatic conditions. In most of the literature, the flow regime of flow boiling in the micro-finned evaporator tube is visualized by the sight glass at the exit of the test section under adiabatic condition. In order to better understand effect of micro-fins in flow boiling in the visualization test section, a novel technique to visualize flow of evaporation under diabatic condition has been developed and presented. R410A flow boiling experiments are conducted at 10 ?C saturation temperature in both of the smooth and micro-finned tubes with the inner diameter of 6.3 mm. The bubble generation in the liquid refrigerant is presented along with bubble departure diameter, bubble departure frequency, and nucleation sites. In addition, the flow regime of the flow boiling under adiabatic and diabatic conditions is compared.

Documents disponibles

Format PDF

Pages : 10

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 : Visualization of R410A flow boiling in diabatic conditions inside horizontal round tubes.
  • Identifiant de la fiche : 30024415
  • Langues : Anglais
  • Source : 2018 Purdue Conferences. 17th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 09/07/2018

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