Permanent magnet array for the magnetic refrigerator

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2002-05-15
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Lee, S. J.
Kenkel, J.
Pecharsky, Vitalij
Jiles, David
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Jiles, David
Distinguished Professor Emeritus
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Ames National Laboratory
Abstract

Recent research into the development of magnetic refrigeration (MR) operating at room temperature has shown that it can provide a reliable, energy-efficient cooling system. To enhance the cooling power of the magnetic refrigerator, it is required to use a magnetic refrigerant material with large magnetocaloric effect (MCE) at the appropriate temperature. Most advanced magnetic refrigerant materials show largest MCE at high applied magnetic fields generated by a superconducting magnet. For application of MCE to air conditioners or household refrigerators, it is essential to develop a permanent magnet array to form a compact, strong, and energy-efficient magnetic field generator. Generating a magnetic field well above the remanence of a permanent magnetmaterial is hard to achieve through conventional designs. A permanent magnet array based on a hollow cylindrical flux source is found to provide an appropriate geometry and magnetic field strength for MR applications.

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The following article is from Journal of Applied Physics 91 (2002): 8894 and may be found at http://dx.doi.org/10.1063/1.1451906.

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Tue Jan 01 00:00:00 UTC 2002
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