2026-03-11T16:43:48Z https://kanazawa-u.repo.nii.ac.jp/oai

oai:kanazawa-u.repo.nii.ac.jp:00011054 2024-06-20T05:54:48Z 934:935:937

Numerical analysis of active magnetic regenerators for hydrogen magnetic refrigeration between 20 and 77 K 松本, 宏一 Matsumoto, Koichi Kondo, Takuya Ikeda, Masakazu Numazawa, Takenori A model active magnetic regenerator refrigerator (AMR) with the Brayton-like operation cycle was analyzed by numerical cycle simulation in the temperature range between 20 and 77 K. In order to study the performance using magnetic material with various transition temperatures Tc, entropy of magnetic material with second order phase transition was calculated using mean field theory and Debye approximation. The cooling performance is shown to be high when the heat exhaust temperature is close to the transition temperature. It is shown that the optimized operation condition depends on both Tc and operation temperatures. Multi-layered AMR beds were shown to improve the performance of AMR. Multi-stage AMR was also discussed. © 2010. 金沢大学理工研究域数物科学系 Elsevier 2011-06-01 2017-10-03 eng journal article AM https://doi.org/10.24517/00011041 http://hdl.handle.net/2297/26242 https://kanazawa-u.repo.nii.ac.jp/records/11054 10.24517/00011041 10.1016/j.cryogenics.2010.06.003 http://www.elsevier.com/locate/issn/00112275 AA00620634 0011-2275 Cryogenics 51 6 353 357 https://kanazawa-u.repo.nii.ac.jp/record/11054/files/SC-PR-MATSUMOTO-K-353.pdf application/pdf 342.1 kB 2017-10-03