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Optimisation d'un échangeur de chaleur à deux courants coaxiaux à l'aide d'ailettes dendritiques.

Dendritic fins optimization for a coaxial two-stream heat exchanger.

Auteurs : BONJOUR J., ROCHA L. A. O., BEJAN A., et al.

Type d'article : Article

Résumé

This article documents the fundamental relation between the maximization of global performance and the malleable (morphing) architecture of a flow system with global constraints. The example used is the coaxial two-stream heat exchanger with flow through a porous bed in the annular space. It is shown that the constraints force the design toward heat exchangers with finite axial length, where additional improvements are derived from installing high-conductivity fins across the porous bed. It is shown that the best configuration (radial vs. branched) depends on the size of the heat exchanger cross-section. When the size is small, the best is the radial pattern. When the size exceeds a certain threshold, the best configuration is the optimized branched tree of films.

Détails

  • Titre original : Dendritic fins optimization for a coaxial two-stream heat exchanger.
  • Identifiant de la fiche : 2004-0583
  • Langues : Anglais
  • Source : International Journal of Heat and Mass Transfer - vol. 47 - n. 1
  • Date d'édition : 01/2004

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