Journal
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Volume 442, Issue -, Pages 87-96Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jmmm.2017.06.039
Keywords
Magnetic refrigeration; Magnetic circuit design; Halbach cylinder; Cost optimization; Topology optimization; Genetic algorithm
Funding
- Natural Sciences and Engineering Research Council of Canada
- BASF New Business
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The active magnetic regenerator (AMR) is an attractive technology for efficient heat pumps and cooling systems. The costs associated with a permanent magnet for near room temperature applications are a central issue which must be solved for broad market implementation. To address this problem, we present a permanent magnet topology optimization to minimize the total cost of cooling using a thermoeconomic cost-rate balance coupled with an AMR model. A genetic algorithm identifies cost-minimizing magnet topologies. For a fixed temperature span of 15 K and 4.2 kg of gadolinium, the optimal magnet configuration provides 3.3 kW of cooling power with a second law efficiency (eta(II)) of 0.33 using 16.3 kg of permanent magnet material. (C) 2017 Elsevier B.V. All rights reserved.
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