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Magnetic Refrigeration with Recycled Permanent Magnets and Free Rare‐Earth Magnetocaloric La–Fe–Si
Author(s) -
Benke Dimitri,
Fries Maximilian,
Specht Marius,
Wortmann Jonas,
Pabst Marc,
Gottschall Tino,
Radulov Iliya,
Skokov Konstantin,
Bevan Alex Ivor,
Prosperi Davide,
Tudor Catalina Oana,
Afiuny Peter,
Zakotnik Miha,
Gutfleisch Oliver
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201901025
Subject(s) - magnetic refrigeration , refrigerant , refrigeration , magnet , materials science , work (physics) , ecological footprint , cooling capacity , chiller , magnetic field , mechanical engineering , environmental science , heat exchanger , thermodynamics , magnetization , engineering , physics , sustainable development , ecology , quantum mechanics , biology
Magnetic refrigeration is an upcoming technology that could be an alternative to the more than 100‐year‐old conventional gas–vapor compression cooling. Magnetic refrigeration might answer some of the global challenges linked with the increasing demands for readily available cooling in almost every region of the world and the global‐warming potential of conventional refrigerants. Important issues to be solved are, for example, the required mass and the ecological footprint of the rare‐earth permanent magnets and the magnetocaloric material, which are key parts of the magnetic cooling device. The majority of existing demonstrators use Nd–Fe–B permanent magnets, which account for more than 50% of the ecological footprint, and Gd, which is a critical raw material. This work shows a solution to these problems by demonstrating the world's first magnetocaloric demonstrator that uses recycled Nd–Fe–B magnets as the magnetic field source, and, as a Gd replacement material, La–Fe–Mn–Si for the magnetocaloric heat exchanger. These solutions show that it is possible to reduce the ecological footprint of magnetic cooling devices and provides magnetic cooling as a green solid‐state technology that has the potential to satisfy the rapidly growing global demands.