As AI data centres guzzle energy, can we harness their wasted heat?
Summary
A supercomputer at the University of Southern Denmark uses liquid cooling to capture its waste heat and send it to the local district heating network. The system, designed by Danfoss, offers one way to reuse heat from data centres as their electricity use grows.Key Facts
- The article says data centres used 485 terawatt-hours of electricity in 2024, equal to 1.5 percent of global electricity supply.
- The International Energy Agency projects data centres’ share of global electricity use will reach 3 percent by 2030.
- The University of Southern Denmark launched the Bitten supercomputer in May.
- Danfoss developed a liquid-cooling system for Bitten that captures all of its waste heat.
- The system pumps coolant over the processors and transfers the resulting hot water to Sonderborg’s district heating network.
- Sonderborg’s district heating network serves about 75,000 residents.
- The United States has about 4,000 data centres, which the article says use 5 percent of the country’s electricity.
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