World’s first wind-powered underwater data centre goes live

The world’s first commercial underwater data centre powered by offshore wind has begun operations off the coast of Shanghai.

Submerged 10 metres beneath the ocean surface and located roughly six miles offshore, the Shanghai Lingang undersea datacentre demonstration project boasts a 24-megawatt capacity.

The £177 million (1.6 billion yuan) project is a joint venture between HiCloud Technology and the state-owned China Communications Construction company, built specifically to handle intensive AI workloads, 5G infrastructure and big data processing.

The facility addresses the two greatest environmental liabilities of modern computing: immense electricity consumption and massive freshwater depletion.

In a traditional, land-based facility, massive graphics processing units (GPUs) generate intense heat, requiring heavy industrial chillers and HVAC systems to continuously pump chilled water through the server racks.

This auxiliary cooling footprint typically devours between 25% and 40% of a facility’s total electricity. Furthermore, the global water footprint required to cool these inland stations is projected to reach 9.3 trillion litres by 2030.

The subsea datacentre potentially rewrites this engineering equation by utilising the surrounding ocean as a giant, passive heat sink. The system operates through an array of sealed, pressure-resistant steel hulls that contain four levels of server racks.

Instead of consuming precious freshwater, heat generated by the processors is transferred directly to the ocean via a highly efficient, circulating copper-pipe heat exchange system.

Because the chilly seawater naturally absorbs and dissipates the thermal output, the facility slashes cooling energy demands by roughly 90%. This passive mechanism reduces the datacentre’s overall electricity consumption by 22.8% compared to land-based equivalents, achieving an exceptional Power Usage Effectiveness (PUE) rating below 1.15.

To eliminate carbon emissions from its remaining power needs, the facility hooks directly into a nearby offshore wind farm via subsea cables. The ocean turbines generate an estimated 95% of the electricity required to keep the servers online.

While tech giants like Microsoft previously piloted underwater pods, their efforts stalled due to high maintenance costs and the extreme difficulty of servicing submerged equipment. Because technicians cannot simply swap out a dead memory module on the seabed, the Shanghai modules are filled with a dry nitrogen atmosphere to prevent condensation and corrosion, relying on heavy infrastructure redundancy to run entirely autonomously for years.

While marine biologists note that the design poses minor localised risks to marine ecosystems via sediment disruption and water heating, they emphasise that the localised thermal variations are narrow, making the ocean floor a highly viable destination for the physical backbone of artificial intelligence.