An optimized magnet for magnetic refrigeration

Authors :: Nini Pryds
Christian R.H. Bahl
Anders Smith
Dennis Christensen
Rasmus Bjørk
Source :: Bjørk, R, Bahl, C R H, Smith, A, Christensen, D & Pryds, N 2010, ' An optimized magnet for magnetic refrigeration ', Journal of Magnetism and Magnetic Materials, vol. 322, no. 21, pp. 3324-3328 . https://doi.org/10.1016/j.jmmm.2010.06.017
Publication Year :: 2010
Publisher :: Elsevier BV, 2010.
Abstract: 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.<br />Comment: 6 pages, 6 figures