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Effet de la fibre frittée à haute porosité en surface dans l'amélioration du transfert de chaleur par ébullition sous-refroidie.

Effect of the high porosity sintered fiber on the surface in subcooled boiling heat transfer enhancement.

Numéro : 1193

Auteurs : SANTIAGO-GALICIA E., KUMATORI K., OTOMO Y., ENOKI K.

Résumé

Nowadays new passive methods to enhance the Critical Heat Flux (CHF) have been investigated for several researchers. Experiments using a novel and practical technique called High Porosity Sintered Fiber were conducted, attaching this material on the heating surface under forced convection subcooled conditions. The effects of the porous thickness on the heat flux and flow aspect were analyzed and recorded using a high speed camera. Three different of porous thickness (0.2,0.5, and 1 mm) and one bare surface (0mm) were tested. Experimental results show that using a porous surface can enhance the heat flux in almost 2 times better than the bare surface under de same wall superheat ΔTsat 𝐾 conditions. Besides that, at high thickness porosity, the CHF tends to reduce in comparison with the low thickness porosity. Bubble formation and pressure drop were also compared. The sintered fiber material is copper with a porosity of 86%.

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Effect of the High Porosity Sintered Fiber on the Surface in Subcooled Boiling Heat Transfer Enhancement

Pages : 6

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Détails

  • Titre original : Effect of the high porosity sintered fiber on the surface in subcooled boiling heat transfer enhancement.
  • Identifiant de la fiche : 30027924
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 14th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2020). Proceedings. Kyoto, Japon, December 7-9th 2020.
  • Date d'édition : 07/12/2020
  • DOI : http://dx.doi.org/10.18462/iir.gl.2020.1193

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