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Static and rotating active magnetic regenerators with porous heat exchangers for magnetic cooling |
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| Authors: | A. Sarlah A. Kitanovski A. Poredos P.W. Egolf O. Sari F. Gendre Ch. Besson |
| Affiliation: | aFaculty of Mechanical Engineering, University of Ljubljana, Askerceva 6, SI-1000 Ljubljana, Slovenia bThermics Institute, University of Applied Sciences of Western Switzerland, CH-1401 Yverdon-les-Bains, Switzerland cInstitute of Energy and Electrical Systems, University of Applied Sciences of Western Switzerland, CH-1401 Yverdon-les-Bains, Switzerland |
| Abstract: | The operation behaviour of an active magnetic regenerator (AMR) with a wavy-structure, or a honeycomb-like regenerator bed was numerically investigated. The thermodynamic model was applied to a static regenerator and – in a generalized version – to a rotary type. The models take two-dimensional unsteady heat conduction in the magnetic material during the four basic processes of the AMR cycle into account. The numerical results were used to determine optimal arrangements of different magnetic materials in order to obtain larger temperature spans between both ends of the porous beds. Furthermore, a first study of magnetic flux lines in a porous rotary heat exchanger was performed. |
| Keywords: | Magnetic refrigerator Heat exchanger Regenerator Material Porous medium Modelling Performance COP Mots clés: Réfrigérateur magnétique Échangeur de chaleur Régénérateur Matériau Milieu poreux Modélisation Performance COP |
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