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Utilisation d'une structure nano- et microporeuse pour l'amélioration de l'ébullition dans un échangeur de chaleur à plaques.

Use of a novel nano- and micro-porous structure for enhanced boiling in a plate heat exchanger.

Auteurs : FURBERG R., LI S., PALM B., et al.

Résumé

This research is an experimental study of the performance of a standard plate heat exchanger evaporator with a novel nano- and micro-porous copper structure, used to enhance the boiling heat transfer mechanism in the refrigerant channel. The enhancement structure had a porosity of 95%, a pore density of 75 pores/mm2 and a thickness of about 250 micrometers. Flow boiling tests were conducted at heat fluxes ranging between 4.5 and 17 kW/m2 with R-134a as refrigerant. Based on water-to-water experiments to determine the water side heat transfer coefficient, the plate heat exchanger with the enhancement structure displayed up to 10 times improved heat transfer coefficient in the refrigerant channel. The overall performance of the heat exchanger was improved by over 100%. This significant boiling enhancement is in agreement with previous pool boiling experiments and confirms that the enhancement structure may be used to enhance the performance of plate heat exchangers.

Détails

  • Titre original : Use of a novel nano- and micro-porous structure for enhanced boiling in a plate heat exchanger.
  • Identifiant de la fiche : 2009-0559
  • Langues : Anglais
  • Source : 9th IEA Heat Pump Conference 2008: advances and prospects in technology, applications and markets. Conference proceedings [CD-ROM + abstracts].
  • Date d'édition : 20/05/2008

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