Photo: Brett Sayles/Pexels
When Finnish engineer Ari Kurvi takes a hot shower or turns up the thermostat in his apartment, he’s tapping into waste heat generated by a 75-megawatt data center 5 kilometers away. Last year, the center heated the equivalent of 2,500 homes, about two-thirds of Mantsala’s needs. Kurvi first applied the concept in 2009, at Kuopio in central Finland, where the waste heat was sold back to the building’s landlord. Five years later, he scaled up and led the work at the Nebius Group NV facility, which heats his home. Now the biggest project with heat recovery technology anywhere in the world is underway just outside Helsinki. Microsoft Corp. is building a cluster of data centers that, when completed, should supply heating to 40% of Espoo, Finland’s second-largest city- about 100,000 homes. Once connected to the city’s district heating network, the center will help eliminate carbon emissions in the system by 2030.
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