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Transfert de chaleur lors de l'ébullition en écoulement saturé du frigorigène R-410A dans un conduit aileté horizontal annulaire.

Saturated flow boiling heat transfer of refrigerant R-410A in a horizontal annular finned duct.

Auteurs : HSIEH Y. Y., LIE Y. M., LIN T. F.

Type d'article : Article

Résumé

An experiment is conducted to investigate the saturated flow boiling heat transfer characteristics of ozone friendly refrigerant R-410A in a horizontal annular finned duct. Meanwhile the associated bubble characteristics in the duct are also inspected from the flow visualization. The experimental data are presented in terms of saturated flow boiling curves, boiling heat transfer coefficients and flow photos. In addition, empirical correlation equations for the saturated flow boiling heat transfer coefficient and mean bubble departure diameter are proposed. The saturated flow boiling curves show that boiling hysteresis is insignificant in the flow and the wall superheat needed for the onset of nucleate boiling is slightly affected by the refrigerant mass flux. Besides, the boiling curves are mainly affected by the imposed heat flux and refrigerant mass flux. Moreover, the measured saturated flow boiling heat transfer coefficient increases with the imposed heat flux and refrigerant mass flux. Furthermore, at a higher refrigerant mass flux the departing bubbles are smaller. [Reprinted with permission from Elsevier. Copyright, 2006].

Détails

  • Titre original : Saturated flow boiling heat transfer of refrigerant R-410A in a horizontal annular finned duct.
  • Identifiant de la fiche : 2007-1945
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 50 - n. 7-8
  • Date d'édition : 04/2007

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