Liquid Nitrogen Cooling Systems

"Liquid nitrogen—LN2—is nitrogen in a liquid state at low temperature. Liquid nitrogen has a boiling point of about −195.8 °C (−320 °F; 77 K). It is produced industrially by fractional distillation of liquid air. It is a colorless, low viscosity liquid that is widely used as a coolant."
https://en.wikipedia.org/wiki/Liquid_nitrogen

"Compared with the air-cooled cooling system, although the liquid-cooled cooling system is complicated, the cooling effect is better (Table 2)."
https://www.tycorun.com/blogs/news/what-is-liquid-cooled-battery-cooling

"prototype superconducting motor cooled by liquid nitrogen"
https://www.greencarcongress.com/2008/06/sumitomo-electr.html

CPU Cooling with Liquid Nitrogen at -196°C / -321°F : World Record 2003 - Tom's Hardware

"Closed-Loop" Liquid Nitrogen Cooler | EVGA Roboclocker Computex

Setting up your PC for liquid nitrogen cooling

Liquid Nitrogen in a CLOSED LOOP!