World’s first sub-zero elastocaloric freezing device is solid-state, eco-friendly, energy-efficient; larger-scale applications targeted

https://www.eurekalert.org/news-releases/1112946

"leverages latent heat released/ absorbed during shape memory alloy cyclic phase transitions... synergistic combination: nickel-titanium alloy maintaining super-elasticity/ high latent heat even at -20°C, calcium chloride transfer fluid having low freezing point/ high wettability improving heat exchange, cascaded tubular design (8 units) providing high surface area/ active Brayton cycle/ withstanding 900MPa stress... cooled insulated chamber to -4°C within 1 hour, 1.43W/g cooling power, 3.4 COP"