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Review on numerical modeling of active magnetic regenerators for room temperature applications |
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| Authors: | K.K. Nielsen J. TusekK. Engelbrecht S. SchopferA. Kitanovski C.R.H. BahlA. Smith N. PrydsA. Poredos |
| Affiliation: | a Department of Mechanical Engineering, Technical University of Denmark Building 425, Niels Koppels Alle, DK-2800 Kgs. Lyngby, Denmark b Fuel Cells and Solid State Chemistry Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, Frederiksborgvej 399, DK-4000 Roskilde, Denmark c University of Ljubljana, Faculty of Mechanical Engineering, Askerceva c. 6, 1000 Ljubljana, Slovenia d University of Victoria, Institute of Integrated Energy Systems, ELW B126, PO Box 3055 STN CSC, Victoria BC, V8W 3P6 Canada |
| Abstract: | The active magnetic regenerator (AMR) is an alternative refrigeration cycle with a potential gain of energy efficiency compared to conventional refrigeration techniques. The AMR poses a complex problem of heat transfer, fluid dynamics and magnetic field, which requires detailed and robust modeling. This paper reviews the existing numerical modeling of room temperature AMR to date. The governing equations, implementation of the magnetocaloric effect (MCE), fluid flow and magnetic field profiles, thermal conduction etc. are discussed in detail as is their impact on the AMR cycle. Flow channeling effects, hysteresis, thermal losses and demagnetizing fields are discussed and it is concluded that more detailed modeling of these phenomena is required to obtain a better understanding of the AMR cycle. |
| Keywords: | Magnetic refrigerator Gadolinium Regeneration Modeling |
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