An exposure assessment approach for potential thermal degradation compounds in 2‐phase immersion cooling operations

Passive 2‐phase immersion cooling (P2PIC) is a technique for cooling computers with the potential to reduce capital and operating costs within datacenters. Computers cooled by P2PIC are submerged in a fluorochemical liquid that boils (hence 2‐phase) from the heat generating components. Although the tanks in which this is done are normally sealed and vented outdoors, they are opened periodically for maintenance. The volatility of the liquids suggests the need for risk assessments relating to inhalation of the liquids' vapor under these normal operating conditions. Fourier transfer infrared vapor concentration measurements gathered during spill and transfer simulation and at two proof‐of‐concept P2PIC installations show inhalation concentrations substantially below exposure guidelines.