Dresden 2017 – scientific programme

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MA: Fachverband Magnetismus

MA 10: Caloric Effects in Ferromagnetic Materials

MA 10.8: Talk

Monday, March 20, 2017, 17:15–17:30, HSZ 04

Magnetocaloric test bench with a new permanent magnet source — •Dimitri Benke, Jonas Wortmann, Tino Gottschall, Andreas Taubel, Konstantin Skokov, Iliya Radulov, and Oliver Gutfleisch — TU Darmstadt, Funktionale Materialien, Deutschland

Due to the rising demand in energy for cooling applications[1], and the rising problems caused by global warming, it is necessary to find ways to contain it to a bearable level. One possible way is the development of magnetocaloric cooling as an alternative cooling technology with the prospect of being more efficient than regular gas-compression systems [2].

To drive this development, we have built a magnetocaloric testbench that is able to create a siginificant thermal span which allows us to compare different magnetocaloric materials in real-life environments. To improved the testbench, we optimized especially the permanent magnet source. This lead to an increased active volume, higher magnetic field change, lower magnet mass and higher measured thermal span in the testbench.

The dependancy on rare-earths is a problem of magnetocaloric cooling. To show that it is possible to decrease that dependancy, the permanent magnet was manufactured from recycled material in cooperation with Urban Mining Co. This work was supported by the Darmstadt Graduate School of Excellence Energy Science and Engineering.

[1] M. Isaac, D. P. van Vuuren, Energy Policy 37 (2009) 507

[2] C. Zimm et al. (1998) Adv. Cryog. Eng