Excess heat

How does it work?

Surplus heat from industrial processes such as drying, evaporation, melting, and cooling can be captured and converted into cost-effective, energy-efficient, and CO2-neutral district heating as well as for potential internal processes using electric heat pumps. While high-temperature surplus heat can be used directly in the district heating network, low-temperature surplus heat, which is more common, needs to be boosted to meet the temperature requirements of the district heating networks.

Surplus heat + outdoor air

In Brønderslev, energy is recovered from the waste heat generated by the local district heating plant’s biomass boilers. When the biomass boilers are in operation, a significant amount of waste heat is generated in the boiler room. This waste heat is recovered by an air purification system. This energy, which is liquid-based, is converted in the electric heat pump, where it is compressed into usable district heating energy. When the temperature in the boiler room is adequate, the energy for the heat pump is extracted from outdoor air using energy absorbers.

Benefits

✓   Energy-efficient
✓   Energy-saving
✓   CO2-neutral heating
✓   Utilization of waste energy
✓   Low-cost production after system investment
✓   Upgrading of unusable process heat to usable
       district heating
✓   Possibility of using waste heat for internal
       processes

Possible applications

✓   District heating
✓   Energy centers
✓   Industrial processes
✓   Food industry
✓   Greenhouses
✓   Data centers
✓   Office buildings
✓   Hospitals
✓   HVAC