A data centre spends energy keeping its servers cool. A nearby factory buys fuel to make heat. Linking the two can turn the data centre's waste heat into a useful input for the factory.
An industrial heat pump makes that link possible. It captures heat at a low temperature and uses electricity to raise it to the temperature another process needs. Data-centre heat already feeds district heating networks: in Stockholm, more than 20 data centres supply about 1.5% of the city's district heat (IEA). Supplying nearby factories applies the same principle.
Take a food factory that needs hot water for washing and cleaning, typically at 60–85°C. Water leaving a data centre's cooling system is often at 25–45°C, and liquid-cooled servers can run warmer. A heat pump bridges that gap, supplying part of the demand or preheating water before it reaches the boiler. The boiler burns less fuel, and the data centre gains a productive home for its heat.
The benefit runs both ways. The heat pump's cold side draws heat out of the data centre's cooling loop, so the data centre may need to run its own chillers less.
The case is strongest when the facilities are close together, operate at similar times and have compatible temperatures. A short pipe route and steady demand can matter as much as the heat pump itself.
Heat pumps are efficient because they move existing heat rather than create it. Their efficiency is measured as the coefficient of performance (COP): useful heat delivered divided by electricity used (US Department of Energy). At a COP of three, for example, a heat pump delivers three units of heat for every unit of electricity; the rest comes from the waste heat. The smaller the temperature lift, the higher the COP, so matching the right source to the right process matters.
Thermal storage can smooth out differences between when heat is available and when the factory needs it. Each facility still needs its own cooling and backup heating for times when the other is offline.
For industrial parks, this points to a new planning habit: map potential heat customers alongside electricity connections, land and water.