Partager

Ecoulement diphasique dans les microcanaux à flux thermique élevé dans les applications de refroidissement : caractéristiques de la chute de pression. I.

Two-phase flow in high-heat-flux micro-channel heat sink for refrigeration cooling applications. I. Pressure drop characteristics.

Auteurs : LEE J., MUDAWAR I.

Type d'article : Article

Résumé

Two-phase pressure drop was measured across a micro-channel heat sink that served as an evaporator in a refrigeration cycle. Predictions of the homogeneous equilibrium flow model and prior separated flow models and correlations yielded relatively poor predictions of pressure drop. A new correlation scheme is suggested that incorporates the effect of liquid viscosity and surface tension in the separated flow model's two-phase pressure drop multiplier. This scheme shows excellent agreement with the R134a data as well as previous micro-channel water data. An important practical finding from this study is that the throttling valve in a refrigeration cycle offers significant stiffening to the system, suppressing the large pressure oscillations common to micro-channel heat sinks (see also this Bulletin, reference 2005-1731).

Détails

  • Titre original : Two-phase flow in high-heat-flux micro-channel heat sink for refrigeration cooling applications. I. Pressure drop characteristics.
  • Identifiant de la fiche : 2005-1730
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 48 - n. 5
  • Date d'édition : 02/2005

Liens


Voir d'autres articles du même numéro (5)
Voir la source

Indexation