Partager

Structures de méchage doubles pour un transfert de chaleur évaporatif amélioré.

Dual-mode wicking structures for enhanced evaporative heat transfer.

Numéro : pap. 2458

Auteurs : KRISHNAN S., TEGROTENHUIS W.

Résumé

This paper reports on conceptual design and thermo-fluid characteristics of two-phase flow devices enabled by dual-mode wicks. In dual-mode wicking structures, liquid and vapor flow paths are integrated on the same plane and segregated flow of the two-phases is achieved by having networks of pores of multiple length-scales. When a mixture of a gas and a liquid flow through this media and the wick material wets the liquid, then the liquid will preferentially segregate to and flow through the mode with the smaller effective pore size. The gas will flow through the paths with the larger effective pore size. These wicks, further, have advantages in phase change heat exchange where the liquid can fill the entire channel. The interwoven liquid and vapor paths facilitate phase segregation and suppress or delay dry out of heated surfaces. Experimental results are presented showing heat transfer coefficients exceeding 25,000 W/m2K. Other characteristics demonstrated include reduced pressure drop and pressure fluctuations, and lower superheat requirements when compared to empty channels. A theoretical basis for enhanced heat transfer is presented, and merits of employing the technology in energy conversion applications are discussed.

Documents disponibles

Format PDF

Pages : 8 p.

Disponible

  • Prix public

    20 €

  • Prix membre*

    15 €

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Dual-mode wicking structures for enhanced evaporative heat transfer.
  • Identifiant de la fiche : 30006590
  • Langues : Anglais
  • Source : 2012 Purdue Conferences. 14th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Date d'édition : 16/07/2012

Liens


Voir d'autres communications du même compte rendu (195)
Voir le compte rendu de la conférence

Indexation