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Multiphysics modeling of a micro-scale Stirling refrigeration system.

Author(s) : GUO D., MCGAUGHEY A. J. H., GAO J., et al.

Type of article: Article

Summary

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.

Details

  • Original title: Multiphysics modeling of a micro-scale Stirling refrigeration system.
  • Record ID : 30008444
  • Languages: English
  • Source: International Journal of thermal Sciences - vol. 74
  • Publication date: 2013/12
  • DOI: http://dx.doi.org/10.1016/j.ijthermalsci.2013.07.003

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