Magnetic cooling at Risoe DTU

Abstract

Magnetic refrigeration at room temperature is of great interest due to a long-term goal of making refrigeration more energy-efficient, less noisy and free of any environmentally hostile materials. A refrigerator utilizing an active magnetic regenerator (AMR) is based on the magnetocaloric effect, which manifests itself as a temperature change in magnetic materials when subjected to a varying magnetic field. In this work we present the current state of magnetic refrigeration research at Risoe DTU with emphasis on the numerical modeling of an existing AMR test machine. A 2D numerical heat-transfer and fluid-flow model that represents the experimental setup is presented. Experimental data of both no-heat load and heat load situations are compared to the model. Moreover, results from the numerical modeling of the permanent magnet design used in the system are presented.

8 pages, 10 figures, 2 tables, conference paper

References in corpus (4)

• Mixed Magnetism for Refrigeration and Energy Conversion
• From first-order magneto-elastic to magneto-structural transition in (Mn,Fe)1.95P0.50Si0.50 compounds
• Giant magneto-elastic coupling in a metallic helical metamagnet
• Temperature, magnetic field, and pressure dependence of the crystal and magnetic structures of the magnetocaloric compound Mn1.1Fe0.9(P0.8Ge0.2)

Cited by in corpus (4)

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• Structural and Magnetic Phase Transitions in MnTe-MnSe solid solutions
• Wide temperature span of entropy change in first-order metamagnetic MnCo1-xFexSi
• Site-specific atomic substitution in a giant magnetocaloric Fe${}_2$P-type system