Journal
APPLIED ENERGY
Volume 236, Issue -, Pages 426-436Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.apenergy.2018.12.012
Keywords
Active magnetic regenerator; Magnetocaloric effect; Superconducting magnet; Liquefaction; Optimization
Categories
Funding
- 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
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Regenerative magnetic cycles are of interest for small-scale, high-efficiency cryogen liquefiers; however, commercially relevant performance has yet to be demonstrated. To develop improved engineering prototypes, an efficient modeling tool is required to screen the multi-parameter design space. In this work, we describe an active magnetic regenerative refrigerator prototype using a high-field superconducting magnet that produces a 100 K temperature span. Using the experimental data, a semi-analytic AMR element model is validated and enhanced system performance is simulated using liquid propane as a heat transfer fluid. In addition, the regenerator composition and fluid flow are simultaneously optimized using a differential evolution algorithm. Simulation results indicate that a natural gas liquefier with a 160 K temperature span and a second-law efficiency exceeding 20% is achievable.
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