Title

Multiphysics modeling of a micro-scale Stirling refrigeration system

Date of Original Version

12-2013

Type

Article

Abstract or Description

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.

DOI

http://dx.doi.org/10.1016/j.ijthermalsci.2013.07.003

 

Published In

International Journal of Thermal Sciences, 74, 44-52.