AARHUS: The geothermal heating plant in Aarhus, which according to the parties will be the largest in the EU, is entering the second test phase.
The first test drilling at the Port of Aarhus has been completed, reports Innargi, which is now moving the drilling rig to Skejby, where the remaining tests will be carried out.
- We are very satisfied with the drilling process at the port and with the temperature in the reservoir, but we could have wished for a higher water production, says project director Lars Heineke.
He adds that it is too early to conclude anything about the preliminary results.
Geothermal is heat energy that comes from the Earth's interior. Two to three kilometers underground, there is water at 60 to 80 degrees Celsius in many places. In a geothermal plant, the hot water is pumped up to the surface and transferred to the water in the district heating network in a closed circuit. Once the water has helped to heat the radiators, it is pumped underground again.
The ambition for the plant, which Innargi is developing in close collaboration with the utility company Kredsløb, is that it will supply 20 percent of the district heating to Aarhus residents by 2030. The test phase will end in 2025.
In Aarhus, geothermal energy is expected to reduce annual CO2 emissions by approximately 165,000 tons.
The use of heat from the earth's interior is underway in several municipalities, including the possibilities for geothermal energy being investigated in Horsens, while Sønderborg has completely shut down geothermal energy as a possible heat source.
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