Comparison of different regenerator geometries design for magnetic refrigeration system
李 晶, 沼澤 健則 （NIMS）； 松本 宏一 （金沢大）； 中込 秀樹 （千葉大）
Abstract:One of the important problems in magnetic refrigeration (MR) system is regenerator geometry for the efficient heat transfer between magnetic material and heat transfer fluid which is the major loss mechanism in cooling system. In order to improve the performance of MR system, it is important to point the advantages & disadvantages of different regenerator geometries. Packed sphere and flat plate regenerator are widely used in MR system. Meanwhile, micro-channels structure has a potential to be a proper regenerator design for the high rate of heat and mass transfer in both from experimental and theoretical studies in the literature. 1-dimention models of 3 kinds of regenerators have been constructed. Micro-channel structure regenerator is considered to be micro-channels with rectangular cross section. 3 kinds of regenerators have been compared from the point view of performance and entropy generation. Finally, the suggestions of Optimized regenerator geometries design for different magnetic refrigeration systems have been given.