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China trials 'energy-saving' underwater data centres

The underwater data centre will use ocean currents for cooling and draw over 95% of its power from renewable sources to cut energy consumption by about 90%, Highlander said.

  • Chinese maritime firm Highlander is preparing to submerge a steel capsule data centre under the sea off Shanghai in mid-October 2025.
  • This underwater project follows Microsoft’s successful 2018-2020 pilot off Scotland and aims to address increasing energy demands for cooling AI servers.
  • Highlander’s pod uses a glass-flake coating to protect servers from salt corrosion and plans to draw over 95% of its energy from renewables like offshore wind farms.
  • Experts note underwater centres can reduce cooling energy by about 90% but face challenges in complex internet connections, construction difficulties, ecological impacts, and potential sabotage via sound waves.
  • Although not intended to replace conventional land-based data centres, these underwater installations may target specialized markets and align with government initiatives aimed at reducing the environmental impact of data centre operations.
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The Killeen Daily HeraldThe Killeen Daily Herald
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China trials 'energy-saving' underwater data centres

Power-hungry data centres run hot, so one Chinese company is planning to submerge a pod of servers in the sea off Shanghai with hopes of solving computing's energy woes.

Nantong - Essential engines for the internet, the data centres generate a lot of unwanted heat. Near Shanghai, a company is about to immerse one at sea, with the hope of lightening the energy and environmental bill of these infrastructures. The Highlander company puts the last touches to the equipment, cables and structures that must be plunged mid-October into the Yellow Sea, off the Chinese metropolis of 24 million inhabitants. The company, on…

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In China, data centers are plunged into the sea Admin FCE 03 Oct 2025 - 06:55 Essential engines for the internet, data centers generate a lot of unwanted heat. Near Shanghai, a company is about to immerse one at sea, with the hope of reducing the energy and environmental cost of these infrastructures.The Highlander company puts the last touches on the equipment, cables and structures that are to be plunged mid-October into the Yellow Sea, off th…

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Watauga Democrat broke the news in Calhoun, United States on Friday, October 3, 2025.
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