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China to Deploy Underwater Data Center Off Shanghai Coast

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.

  • In mid-October, Chinese maritime technology company Highlander will submerge a pod of servers off the sea off Shanghai, assembling the capsule at a Nantong shipyard.
  • Ocean currents will supply cooling while offshore wind farms provide power, with more than 95 percent renewable energy supporting China Telecom and a state‑owned AI computing company.
  • Built onshore in components, the capsule features a protective coating with glass flakes, elevator access to above‑water segment for maintenance, and a complex submarine cable for mainland internet connection.
  • Researchers at the University of Florida and the University of Electro‑Communications in Japan warn sub‑marine data centers' heat could attract or drive away species, raising ecological concerns, and found vulnerability to sound‑wave attacks conducted through water.
  • Projects like this are currently focused on proving feasibility, with Shaolei Ren warning scaling heat concerns may limit deployment and Highlander's Yang Ye saying `Underwater operations have inherent advantages`.
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Channel News AsiaChannel News Asia
+4 Reposted by 4 other sources
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China trials 'energy-saving' underwater data centres

Undersea servers are kept at a low temperature by ocean currents, rather than the energy-intensive air cooling or water evaporation required by data centres on land.

·Singapore
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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.

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Recharge | Renewable Energy News broke the news in on Wednesday, June 11, 2025.
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