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Transfert de chaleur par ébullition dans des puits thermiques diphasiques à microcanaux. 1ère partie. Etude expérimentale des méthodes de corrélation. 2ème partie. Modèle de l'écoulement diphasique annulaire.

Flow boiling heat transfer in two-phase micro-channel heat sinks. Part I. Experimental investigation and assessment of correlation methods. Part II. Annular two-phase flow model.

Auteurs : QU W., MUDAWAR I.

Type d'article : Article

Résumé

This article concerns measurement and prediction of saturated flow boiling heat transfer in a water-cooled micro-channel heat sink. New experimental results are discussed and provide a new physical insight into the unique nature of flow boiling in narrow rectangular micro-channels. Tests were performed with deionized water over a mass velocity range of 135-402 kg/m2 s, inlet temperatures of 30 and 60 °C, and an outlet pressure of 1.17 bar. Results indicate an abrupt transition to annular flow near the point of zero thermodynamic equilibrium quality, and reveal the dominant heat transfer mechanism is forced convective boiling corresponding to annular flow. Part II of this study will introduce a new annular flow model as an alternative approach to heat transfer coefficient prediction for micro-channels.

Détails

  • Titre original : Flow boiling heat transfer in two-phase micro-channel heat sinks. Part I. Experimental investigation and assessment of correlation methods. Part II. Annular two-phase flow model.
  • Identifiant de la fiche : 2004-1641
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 46 - n. 15
  • Date d'édition : 07/2003

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