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MA: Fachverband Magnetismus
MA 61: Caloric Effects
MA 61.9: Vortrag
Freitag, 20. März 2020, 11:30–11:45, HSZ 101
Utilizing the Thermomagnetic Response of the Magnetocaloric alloy Energy Harvesting Application — •Deepak Kamble1, 2 and Raju V. Ramanujan1 — 1School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798 — 2Present address: Leibniz IFW Dresden, Institute for Metallic Materials, Helmholtzstraße 20, 01069 Dresden, Germany
Thermal management is important to convert waste heat to useful electricity. Here we present an approach based on magnetocaloric materials, which allows us to harvest electricity from waste heat. As a first step we synthesized and characterized (MnNiSi)1-x(Fe2Ge)x alloys exhibiting 1st order magnetostructural transition. The alloys have a highly tunable transition range near room temperature with promising magnetocaloric parameters [K. Deepak et al., J. Alloys Compd. 743 (2018) 494-505]. As a second step the thermomagnetic response of the alloy with suitable transition temperature was utilized as working material to develop a novel hybrid thermomagnetic oscillator for electricity harvesting using waste heat from a heat load. The thermomagnetic alloy (TMA) was suspended in a quartz tube between heat load at the top and heat sink at the bottom resulting in oscillation of TMA due to the thermomagnetic response. The continuous oscillation gives rise to a magnetic flux change in the coil to generate electricity as well as transfers the heat from the heat load to the heat sink [K. Deepak et al., Applied Energy 233-234 (2019) 312-320].