The design uses no ice, which is the cooling agent ... put a fan on top to blow the air down across the ice. This is similar, but acts more like an evaporative cooler (not really a traditional ...
The evaporation process is performed by pumping water onto special wet pads while fans push air through ... system was used to power the evaporative cooling system, that is the water pumping ...
Racks and servers are fitted with fans, and datacentres install computer ... vent waste heat to the outside air. If they use evaporative cooling, this needs both electricity and water.