What the development involves
In single-phase immersion cooling, the liquid stays liquid and is pumped through a heat exchanger. Submer and Telefónica have installed such a solution at a telecom facility in Spain (Submer).
What benefits are documented
Submer reports up to 50% better energy efficiency in Telefónica's trial, but does not state the basis of comparison. The figure should therefore be treated as a vendor claim.
What it could mean in Sweden
For colocation, where many customers share the facility, relevance is low to medium. Customers often want standardized racks, and servicing, IT warranties and fluid handling become more complicated with tanks.
What needs to be investigated
Whether floor slabs and halls should be designed for the higher loads so that the technology can be adopted later. What fire protection and insurance require. How the fluid is managed over the life of the facility.
