Hillerød Forsyning and Innargi sign agreement on geothermal energy

Geothermal energy is heat from the earth’s interior – a local, stable, renewable energy source. Hillerød Forsyning has long aspired to utilise geothermal energy for district heating, and already in 2013, the utility company carried out seismic surveys to map the subsurface.

Geothermal energy is always available

Two to three kilometres beneath Hillerød there is expected to be 60-80 degrees Celsius geothermal water that can be pumped up to the surface via deep boreholes, where the heat is transferred to the water in the district heating network in a closed circuit. Once the heat is transferred, the geothermal water is pumped back underground.

If the pumps in the geothermal plants are powered by renewable energy from the sun or wind, geothermal energy is not only CO2 neutral but also free from other harmful emissions. The geothermal heat source is always available – even when the sun isn’t shining, and the wind isn’t blowing.

The parties are assessing the possibility of establishing a plant with 2-4 wells, which in total is expected to be able to supply between 20 and 40 MW of district heating. The exact location, plant capacity and other technical issues will be clarified in the coming months.

Ambitious timeline

The parties have agreed to aim for clarification and an agreement by the end of September.