GoKawiilKIT and Tsukuba researchers build heat-driven solid-state cooler with no electric motor
Scientists from Karlsruhe Institute of Technology and the University of Tsukuba built a solid-state cooling prototype that uses a shape-memory titanium-nickel film to convert heat directly into the mechanical motion needed to drive elastocaloric cooling, replacing the usual electric actuator. In tests, heating the actuator film to 86°C produced a 4.0 K temperature difference across the cooling device, and swapping in an external 130°C heat source still yielded a 2.2 K span, showing waste heat alone can power the cycle.