A data center in Sweden has cut its energy bills by a million dollars a year using seawater to cool its servers, though jellyfish are an occasional hazard. Interxion, a collocation company in the Netherlands that rents data center space in 11 countries, uses water pumped from the Baltic Sea to cool the IT equipment at its facilities in Stockholm. The energy used to cool IT equipment is one of the costliest areas of running a data center. Companies have traditionally used big, mechanical chillers, but some are turning to outside air and evaporative techniques as lower-cost alternatives.
Pretty awesome idea. All they need to do is clean the heat exchanger.