2 weeks ago
South Korea Plans Underwater Data Centres to Tackle AI Demand
Computers that help power things like smart apps and websites need special buildings called data centres.
These buildings use a lot of electricity and take up a lot of space.
South Korea is running out of room on land, and its power grids are getting too full.
So the country came up with a clever idea: build data centres underwater.
The city of Ulsan is working on an underwater data centre that could hold up to 100,000 computers.
It would sit about 20 metres below the ocean surface.
The cold seawater would keep the computers cool naturally, like putting a cold drink in the fridge.
This could cut carbon emissions by about 12%.
By 2028, the Seoul region will need more than 1,450 megawatts of power for data centres, but very few building requests are being approved.
Underwater data centres could be one way to solve this big problem.
South Korea is developing an underwater data centre in Ulsan that could house up to 100,000 servers.
The facility would sit about 20 metres below the surface, using seawater for natural cooling.
Seawater cooling could cut carbon emissions by about 12%, aided by the area's average water temperature of 13.3°C.
Data centre power demand in the Seoul region is set to exceed 1,450 MW by 2028, with only 1.9% of applications approved.
Land scarcity and overwhelmed power grids, driven by the AI boom, are pushing South Korea to consider underwater data centres.
- Who
- South Korea, led by the city of Ulsan, which is developing the underwater data centre project
- What
- Building an underwater data centre capable of housing up to 100,000 servers, cooled naturally by seawater
- Where
- Ulsan, South Korea, about 20 metres below the sea surface
- When
- Project timeline not specified; Seoul region data centre power demand is projected to exceed 1,450 MW by 2028
- Why
- Land is running out and power grids are overwhelmed by AI-driven demand for data centres; seawater cooling could cut carbon emissions by about 12%
Key facts
- Location
- Ulsan, South Korea
- Server capacity
- Up to 100,000 servers
- Depth
- About 20 metres below the surface
- Average seawater temperature
- 13.3°C
- Estimated carbon emission reduction
- About 12%
- Seoul region power demand by 2028
- Over 1,450 MW
- Data centre application approval rate
- 1.9%









