How does sub-ambient cooling work?
There are water cooling systems for computers that can cool components to below room temperature. The problem I see here is that the water is cooled using room temperature air. How can the cooling system keep a 150 watt computer component at a temperature below room temperature? The only powered device on the water cooling loop is the pump and since that isn't being cooled by anything else than the water it cannot contribute to the lower temperature.
I'm guessing this has something in common with a Geothermal heat pump, but reversed.