Meta's Odense Data Center Recycles Waste Heat to Warm 11,000 Danish Homes

In Odense, Denmark, Meta has launched a unique system at its data center that repurposes waste heat from its servers to warm around 11,000 homes nearby. The engineering firm Ramboll developed this project to address the fact that nearly 40% of a data center's energy is consumed for cooling, resulting in heat being released. Initially, the heat isn’t hot enough for direct building use. Ramboll’s approach involves circulating water from Odense's district heating system through the cooling setup to gather heat, which is then raised to about 70 to 75°C (158°F to 167°F) using ammonia heat pumps before being sent out. Meta claims this system has produced around 165,000 megawatt-hours of heat. Energy expert Lauren Edelman pointed out that while heat pumps and heat capture coils are not new, combining them effectively at such a scale is innovative. This initiative comes amid growing local worries about the water use and electricity demands of data centers. The Odense facility shows how data centers can positively impact their communities through smart infrastructure and planning.