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Modélisation en multiphysique d'un système frigorifique Stirling à micro-échelle.

Multiphysics modeling of a micro-scale Stirling refrigeration system.

Auteurs : GUO D., MCGAUGHEY A. J. H., GAO J., et al.

Type d'article : Article

Résumé

A new micro-scale refrigeration system composed of arrays of silicon MEMS cooling elements that operate on the Stirling cycle has been designed. In this paper, we describe a multiphysics computational approach for analyzing the system performance that considers compressible flow and heat transfer with a large deformable mesh. The regenerator pressure drop and effectiveness are first explored to determine the optimal porosity. A value near 0.9 is found to maximize the coefficient of performance. To overcome the computational complexity brought about by the fine pillar structure in the regenerator, a porous medium model is used to allow for modeling of a full element. Parametric studies demonstrate the effect of the operating frequency on the cooling capacity and the coefficient of performance.

Détails

  • Titre original : Multiphysics modeling of a micro-scale Stirling refrigeration system.
  • Identifiant de la fiche : 30008444
  • Langues : Anglais
  • Source : International Journal of thermal Sciences - vol. 74
  • Date d'édition : 12/2013
  • DOI : http://dx.doi.org/10.1016/j.ijthermalsci.2013.07.003

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