Modern military equipment runs on electronics, and electronics make heat. A radar, a communications truck, or a ship's computer room has to shed that heat somewhere, in a space that's already full, on power that's already spoken for. If the cooling can't keep up, the system slows down or shuts off.
That's the problem we brought to NATO, and we're glad to say Phasic is part of the 2025 cohort of DIANA, the Defence Innovation Accelerator for the North Atlantic. DIANA is NATO's program for finding commercial technology that can serve defense and helping small companies adapt it. NATO announced the cohort in December 2024: over 70 companies chosen from more than 2,600 submissions. The program began in January 2025. Each company receives EUR 100,000 and access to DIANA's test centers, where hardware meets the conditions it will face in the field.
Why cooling matters in the field
Defense buyers talk about size, weight, and power, and cooling touches all three. A smaller, lighter cooling system leaves room and weight for the equipment that matters. One that needs less pumping power leaves more of a vehicle's or a ship's electricity for the mission. And a cooling system that keeps working through heat, shock, and salt air keeps the electronics working too.
Where we come in
We 3D print heat exchangers, the part of a cooling system where heat moves from one fluid to another. Printing lets us shape the unit to the space available, rather than to a factory's stamping tools, and shape the channels inside to move heat well while letting fluid flow freely. Our data center work starts from the same idea.
What's next
In DIANA, we're working on printed heat exchangers for military electronics, where the platform sets the space, weight, and power the cooling can use.
We're proud to be in the cohort, and we'll share what we learn as the program goes on.
Update, October 2026: Our data center work now includes a 1 MW heat exchanger for the Open Compute Project's Deschutes cooling design.