An optimized magnet for magnetic refrigeration

作者：Bjork R^*; Bahl C R H; Smith A; Christensen D V; Pryds N

来源：Journal of Magnetism and Magnetic Materials, 2010, 322(21): 3324-3328.

DOI：10.1016/j.jmmm.2010.06.017

• Halbach cylinder
• Magnetic field
• Permanent magnet flux source
• Magnetic refrigeration

A magnet designed for use in a magnetic refrigeration device is presented. The magnet is designed by applying two general schemes for improving a magnet design to a concentric Halbach cylinder magnet design and dimensioning and segmenting this design in an optimum way followed by the construction of the actual magnet. The final design generates a peak value of 1.24 T, an average flux density of 0.9 T in a volume of 2 L using only 7.3 L of magnet, and has an average low flux density of 0.08 T also in a 2 L volume. The working point of all the permanent magnet blocks in the design is very close to the maximum energy density. The final design is characterized in terms of a performance parameter, and it is shown that it is one of the best performing magnet designs published for magnetic refrigeration.

• 出版日期2010-11