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Calculation of the equivalent properties of a refrigerant bed using the inverse problem method and homogenization.

Author(s) : BOUCHEKARA H., KEDOUS-LEBOUC A., FOURNIER J. M.

Summary

According to the applied field level and the material used, a direct thermal cycle or an active magnetic regenerative refrigeration cycle can be investigated. A subdivided refrigerant bed is required to enhance the heat exchange and to optimize the cooling power obtained (spheres, strips, grid, honeycomb, etc.). To study the electromagnetic behaviour of such a system, numerical methods like finite element are recommended. However, when the dimensions of one cell (plate, sphere) are negligible compared with the dimensions of the whole system these methods fail. For a better study of the electromagnetic behaviour, one should replace the real inhomogeneous bed (MCE material + air or fluid) by an equivalent homogeneous one. In this paper, an inverse problem method is introduced to calculate the equivalent electromagnetic properties of the homogenous bed. Then, a direct homogenization method is introduced and validated. Finally, it is shown that a huge gain in computing time is obtained by this last homogenization.

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Pages: 2007-1

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Details

  • Original title: Calculation of the equivalent properties of a refrigerant bed using the inverse problem method and homogenization.
  • Record ID : 2007-1551
  • Languages: English
  • Source: 2nd International Conference on Magnetic Refrigeration at Room Temperature
  • Publication date: 2007/04/11

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