A 7MW data center constructed on a barge at Port of Stockton, California, is being cooled using water from the San Joaquin River. The 10,000ft2 (930m2) Nautilus’ Stockton data center claims a zero-impact cooling system with high energy efficiency, no water consumption, no refrigerants, no water treatment chemicals, no wastewater, and no harm to wildlife.

The Nautilus Stockton data center is a high-density data center with a cooling system that cuts net power consumption by 30%, supporting 7MW of critical IT load in four vaults.

The center uses Nautilus TRUE (Total Resource Usage Effectiveness) closed water-loop technology using the cold river water to keep racks cool. The system uses no mechanical refrigeration and operates under vacuum, assuring no threat of leaks.

Cool water from the bay is filtered before reaching the heat exchanger. A freshwater cooling loop on the other side of the heat exchanger feeds the cool water to the rear-door systems on the racks.

The IT equipment is housed inside modular data halls on the deck, with servers in racks with rear-door cooling units. Each data hall has four parallel 675kW leak-proof cooling distribution units configured in a “4 to make 3” configuration, each fed by redundant open-loop systems. All the mechanical and electrical equipment are located below the deck in the hold.

James Connaughton, CEO, Nautilus, said: “The rapidly growing data center sector is just as rapidly on the way to becoming utterly unsustainable. Nautilus can reverse that. Our goal is to transform the data center sector into a higher-performing, dramatically more sustainable, and more rapidly and equitably able to serve communities, government, and businesses globally. We want to make this technology as widely available as possible to help close the digital divide and enhance the lives of people around the world.”

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