Data center immersion cooling is an advanced thermal management technique in which servers and IT equipment are fully submerged in a thermally conductive, electrically non-conductive liquid — either a dielectric mineral oil or a synthetic fluid. Unlike traditional air-cooling systems, immersion cooling transfers heat directly from the hardware into the surrounding liquid, dramatically improving cooling efficiency and enabling higher compute densities.
As heat is absorbed by the coolant, it must be continuously extracted and dissipated to maintain stable operating temperatures. This is where heat exchangers become critical: they draw the warmed fluid from the immersion tank, transfer its thermal load to a secondary water circuit or a facility cooling loop, and return the cooled fluid back into the bath. Typical operating temperatures for the dielectric fluid range between 40–60°C, while the secondary cooling loop requires chilled water supply in the range of 20–45°C depending on the system design and climate conditions.
Immersion cooling also opens the door to heat reuse opportunities — the recovered thermal energy can be redirected to heat buildings or other facility processes, making it one of the most energy-efficient and sustainable cooling strategies available today.
Discover how General ThermoDynamics & Airtech heat exchangers are purpose-built to meet the precise thermal demands of immersion-cooled data centers.