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 E-Mail Credit: Photo: IMT/KIT Use of waste heat contributes largely to sustainable energy supply. Scientists of Karlsruhe Institute of Technology (KIT) and T?hoku University in Japan have now come much closer to their goal of converting waste heat into electrical power at small temperature differences. As reported in Joule, electrical power per footprint of thermomagnetic generators based on Heusler alloy films has been increased by a factor of 3.4. (DOI: 10.1016/j.joule.2020.10.019) Many technical processes only use part of the energy consumed. The remaining fraction leaves the system in the form of waste heat. Frequently, this heat is released into the environment unused. However, it can also be used for heat supply or power generation. The higher the temperature of the waste heat is, the easier and cheaper is its reuse. Thermoelectric generators can use waste heat of low temperature for direct conversion into electrical power. Thermoelectric materials used so far, however,

Baden wubergJoel josephMartin heidelbergerMakoto ohtsukaHiroyuki mikiManfred kohlDevices groupThoku universityScientists of karlsruhe institute technologyHelmholtz associationEnergy centerInstitute of microstructure technologyResearch universityKarlsruhe instituteMicrostructure technologyProfessor manfred kohl