China Starts World’s First Wind-Powered Underwater Data Centre Off Shanghai
Published · 6 min read
A New Kind of Data Centre Goes Live
China has started operations at what is being described as the world’s first wind-powered underwater data centre, a project that puts servers under the sea and connects them to offshore renewable power.
The facility is located off the coast of Shanghai, near the Lin-gang Special Area. It sits about 10 metres below the surface and is powered by a nearby offshore wind farm. The project has a total capacity of 24 megawatts and began commercial operations in May 2026.
This is not just a strange engineering experiment. It is a direct answer to a big problem: data centres are getting larger, hotter, and more expensive to run as artificial intelligence demand grows.
AI needs heavy computing power. Heavy computing power creates heat. Heat needs cooling. Cooling uses energy and water. That is the chain.
China is trying to break that chain by moving part of the system underwater.
The Basic Idea Is Simple
The Shanghai Lingang underwater data centre uses the sea as a natural cooling system. Instead of using large land-based cooling systems that require chilled water and power-hungry equipment, the servers are sealed inside underwater modules. The surrounding seawater helps carry heat away.
That cuts energy use.
It also reduces the need for freshwater, which is becoming a bigger concern for traditional data centres. Many land-based facilities use large amounts of water to keep servers cool. As AI expands, that demand is only expected to rise.
The new Shanghai project is built around three ideas:
- Use offshore wind for cleaner electricity
- Use seawater for natural cooling
- Use offshore space instead of valuable city land
That is the pitch. Less power wasted. Less land used. Less freshwater consumed.
Why It Matters
Data centres are now the backbone of the digital economy. They support cloud computing, AI models, streaming, online banking, mobile apps, and business software. They are invisible to most users, but they run modern life in the background.
The issue is that they consume huge amounts of electricity.
In a land-based data centre, a large share of electricity can go into cooling instead of actual computing. Reports note that cooling can account for 25% to 40% of total electricity demand in traditional facilities. That is a big bill before a server even does useful work.
The Shanghai project is designed to reduce total power use by more than one-fifth compared with a land-based equivalent. The facility also aims for strong energy efficiency by using passive seawater cooling and offshore wind.
This is the real point: China is not only building more computing power. It is trying to make that computing power cheaper to cool.
The Project Details
Where It Is Located
The data centre is positioned more than 10 kilometres off Shanghai’s coast, near the Lin-gang Special Area. This area is already tied to high-tech industry and advanced manufacturing. It is also close to offshore wind resources, which makes the location useful for this kind of project.
The facility is surrounded by a wind farm with more than 50 turbines, according to reports.
Who Built It
The project is connected to HiCloud Technology and China Communications Construction, a state-owned company. Other Chinese state-linked technology and telecom players are also involved in the broader ecosystem around the facility.
The total investment has been reported at about 1.6 billion yuan, or roughly $226 million.
How Big It Is
The underwater data centre has a reported capacity of 24 megawatts. It was developed in phases, starting from a smaller demonstration setup before scaling to the larger commercial system.
Reports also say China Telecom has installed GPU clusters in the facility. That matters because GPUs are central to AI computing. They are powerful, but they also create serious heat. That makes cooling one of the biggest cost and design problems in AI infrastructure.
China’s AI Push Is Driving the Need
China has made AI a major part of its economic and technology strategy. That means more data centres. More computing. More power demand.
The country has also said it wants to increase clean energy supply for AI infrastructure by 2030. This underwater facility fits that direction.
It is not hard to see why.
AI data centres need stable power. They need fast cooling. They need land. In dense coastal cities like Shanghai, land is expensive. Water use is sensitive. Power demand is rising.
An underwater wind-powered data centre tries to solve several problems at once.
It may not solve all of them. But it is a serious attempt.
Microsoft Tried the Underwater Idea First
China was not the first country to test underwater data centres. Microsoft ran an underwater data centre pilot called Project Natick near Scotland. That project showed promising results, including the possibility of improved reliability in sealed underwater systems.
But Microsoft did not turn it into a large commercial rollout.
China has now moved faster on commercial deployment. The difference appears to be scale, state support, industrial capacity, and local demand for computing power.
That is the key lesson. A good idea is not enough. You need manufacturing, policy, money, power supply, and buyers.
China brought those pieces together.
The Benefits Are Clear
The project offers several possible advantages:
- Lower cooling energy use because seawater helps absorb heat
- Reduced freshwater demand compared with traditional cooling systems
- Less land pressure in crowded coastal areas
- Better use of offshore wind power
- Support for AI, cloud, big data, and 5G services
- A model for future clean digital infrastructure
That is why the project is getting global attention. It links two major trends: renewable energy and AI infrastructure.
One creates cleaner power. The other needs massive power. Putting them together makes sense.
The Risks Are Also Real
This is not a perfect solution.
Underwater data centres come with major engineering concerns. Saltwater is harsh. Cables must survive for long periods. Sealed modules must handle pressure. Maintenance is harder than in a normal building.
If a server fails in a land-based data centre, technicians can reach it quickly. Underwater, repair work is more complex and expensive. That means the system needs strong remote monitoring, durable hardware, and reliable sealed designs.
There are also environmental questions.
Experts have raised concerns about possible effects on marine ecosystems. These include disturbed sediments, noise, and local heating of seawater around the modules. Some specialists believe the risks can be managed, but they still need long-term monitoring.
That is the honest view: the idea is promising, but it has to prove itself over time.
Bottom Line
China’s wind-powered underwater data centre off Shanghai is a serious step in the next phase of digital infrastructure.
It is not just about putting servers under the sea. It is about making AI infrastructure less wasteful, less thirsty, and less tied to crowded land-based sites. The project uses offshore wind for power and seawater for cooling. It has a capacity of 24 megawatts and is already in commercial operation.
The upside is strong. Lower cooling demand. Less freshwater use. Better renewable energy integration.
The challenge is execution. Underwater maintenance, corrosion, cable reliability, and marine impact will decide whether this becomes a real model or stays a high-profile experiment.
For now, China has moved first at commercial scale.
And in the AI infrastructure race, moving first matters.
