Want an Energy-Efficient Data Center? Build It Underwater

Microsoft wants to submerge data centers to keep them cool and to harvest energy from the sea


When Sean James, who works on data-center technology for Microsoft, suggested that the company put server farms entirely underwater, his colleagues were a bit dubious. But for James, who had earlier served on board a submarine for the U.S. Navy, submerging whole data centers beneath the waves made perfect sense.

This tactic, he argued, would not only limit the cost of cooling the machines—an enormous expense for many data-center operators—but it could also reduce construction costs, make it easier to power these facilities with renewable energy, and even improve their performance.

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