期刊
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
卷 451, 期 -, 页码 79-86出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2017.11.002
关键词
Active magnetic regenerator; Gadolinium; Liquefaction; Superconducting; Genetic algorithm
资金
- Fuel Cell Technology Office of the Energy Efficiency and Renewable Energy Office of the Department of Energy
- Natural Sciences and Engineering Research Council of Canada
Active magnetic regenerators (AMR) have the potential for high efficiency cryogen liquefaction. One active magnetic regenerative liquefier (AMRL) configuration consists of dual magnetocaloric regenerators that reciprocate in a persistent-mode superconducting solenoid. Issues with this configuration are the spatial and temporal magnetization gradients that induce large magnetic forces and winding currents. To solve the coupled problem, we present a force minimization approach using passive magnetic material to balance a dual-regenerator AMR. A magnetostatic model is developed and simulated force waveforms are compared with experimental measurements. A genetic algorithm identifies force-minimizing passive structures with virtually ideal balancing characteristics. Implementation details are investigated which affirm the potential of the proposed methodology. Published by Elsevier B.V.
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