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

Author(s) : BONJOUR J., ROCHA L. A. O., BEJAN A., et al.

Type of article: Article

Summary

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.

Details

  • Original title: Dendritic fins optimization for a coaxial two-stream heat exchanger.
  • Record ID : 2004-0583
  • Languages: English
  • Source: International Journal of Heat and Mass Transfer - vol. 47 - n. 1
  • Publication date: 2004/01

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