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Influence de la longueur du jet et de la température ambiante sur la performance d'un système frigorifique à puits de chaleur à collision de jet diphasique.

Effect of jet length and ambient temperature on the performance of a two-phase jet impingement heat sink refrigeration system.

Auteurs : OLIVEIRA P. A. de, BARBOSA J. R. Jr

Type d'article : Article, Article de la RIF

Résumé

The jet impingement heat sink integrated with a compact oil-free R-134a vapor compression refrigeration system introduced in a previous work (Oliveira and Barbosa, 2017) is now further evaluated in terms of the influence of the compressor piston stroke, applied thermal load, orifice-to-heater distance (jet length) and ambient (hot end) temperature. The proposed heat sink is a compact active thermal solution for concentrated heat loads because it integrates the evaporator and the expansion device into a single unit, making use of a single two-phase impinging jet as the cooling mechanism. The present analysis is based on the coefficient of performance and other steady-state heat transfer parameters associated with the impinging jet (heat transfer coefficient and heater surface temperature). A reduction of the jet length promoted a more vigorous splattering of the jet on the heated surface, enhancing the droplet breakup, which in turn reduced significantly the critical heat flux. An increase of the hot reservoir temperature increased the jet impingement heat transfer coefficient.

Documents disponibles

Format PDF

Pages : 331-342

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 : Effect of jet length and ambient temperature on the performance of a two-phase jet impingement heat sink refrigeration system.
  • Identifiant de la fiche : 30021950
  • Langues : Anglais
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 75
  • Date d'édition : 03/2017
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2017.01.001

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