Impact expErimental de la conception d'aimant et de rEgEnErateur sur la performance frigorifique de matEriaux magnEtocaloriques de premier ordre
Experimental impact of magnet and regenerator design on the refrigeration performance of first-order magnetocaloric materials
Abstract The first-order magnetic transition material LaFeSiMn(H) is used to create multi-stage regenerators to investigate the importance of regenerator and magnet design on magnetocaloric refrigeration performance. Aspect ratio, magnetic field strength, particle size, and staging are varied while keeping overall span and material mass at a constant level. Tests carried out on these regenerators show that the regenerator and magnetic systems play a key role in determining the performance of a magnetocaloric refrigerator. A one-dimensional numerical machine model using both measured material data and data reconstructed from a mathematical material model is used to predict test results. The machine model and material model make predictions with less than 5% average error over the range of experimental parameters. Highlights Modeling of LaFe based first order magnetocaloric material. Experimental results from a variety of test conditions for a multistage first order regenerator. Statistical comparisons of modeled materials to measured materials. Multiple regenerator designs.
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