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Optimization of cylindrical Halbach permanent magnet array dimensions for magnetic refrigeration.

Number: pap. n. R20, 2335

Author(s) : KURAL M. H., CELIK S., NAGESHWARAN S.

Summary

Halbach cylindrical permanent magnet arrays (HCPMA) are promising for magnetic refrigeration applications since they have strong magnetic field inside the cylinder and weaker magnetic field outside. To investigate the effect of dimensional ratios of a HCPMA on the cooling performance of the magnetic refrigerator, FEMM (Finite Element Method Magnetics) 4.0 software was used. For different external radii, average magnetic fields inside the cylinderwere calculated. Magnetization curves of Gd (Gadolinium) element were used to calculate magnetization entropy changes and cooling energies for obtained average magnetic field values. Cooling energy to magnet volume ratio was calculated to determine dimensions of the Halbach array which allows most efficient magnet usage. In addition to magnet dimensions, effect of using soft magnetic materials inside and outside the permanent magnet cylinder on magnetic field and cooling energy was also investigated.

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Pages: 7 p.

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Details

  • Original title: Optimization of cylindrical Halbach permanent magnet array dimensions for magnetic refrigeration.
  • Record ID : 30000797
  • Languages: English
  • Source: 2010 Purdue Conferences. 13th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2010/07/12

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