Regensburg 2016 – wissenschaftliches Programm

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MM: Fachverband Metall- und Materialphysik

MM 24: Topical session: Caloric Effects in ferroic materials II - Methods and Applications

MM 24.1: Vortrag

Dienstag, 8. März 2016, 12:00–12:15, H53

Detailed loss analysis of a magnetocaloric demonstrator using FEM-simulations — •Dimitri Benke, Tino Gottschall, Fabian Jäger, Marc Pabst, Konstantin Skokov, Iliya Radulov, and Oliver Gutfleisch — TU Darmstadt, Institute of Material Science, Alarich-Weiss-Str. 16, 64287 Darmstadt, Germany

The performance of many magnetocaloric materials has been reported and compared many times in the literature [1-3]. However, this comparison is mostly not done in conditions mirroring the real device. In order to assess materials in an environment being comparable to application, a magnetocaloric test bench was built. This demonstrator can be used to compare the performance of a material under cyclic conditions being in contact with an oscillating heat exchange fluid.

In order to assess the suitability of a material, the different loss mechanisms during operation of the demonstrator have to be evaluated. By this it is possible to make full use of the potential of the materials. This has been done by combining measurements of the temperature span and FEM simulations of the magnetocaloric test bench when varying the system parameters.

This work was supported by the Darmstadt Graduate School of Excellence Energy Science and Engineering.

[1] M.E. Wood, W.H. Potter, Cryogenics Vol. 25, Issue 12,(1985)665.

[2] K.G. Sandeman, Scripta Mater. 67 (2012) 566.

[3] D.D. Belyea et al. ,Sci. Rep. 5 (2015) 15755.