TiNiFe refrigerant film

KIT and Tsukuba replace the elastocaloric cooler's motor with an alloy film that pulls when heated

The prototype turns 86C of Joule heat into a 12.9 K swing in the refrigerant film and 4.0 K across the assembled device, while a 130C external source held 2.2 K. Where the rest of the span goes decides whether this scales.