Geothermal Heating Plant Neustadt-Glewe

Since 1995, the natural potential of the deep subsurface is used to supply more than 1,100 households and numerous commercial customers with heat in an environmentally friendly way.

The thermal water, with a temperature of 97 °C and a flow rate of up to 110 m³/h, is produced from a depth of 2,450 m and, after a first filtration stage, transported to the geothermal heating plant 500 m away, where the heat is transferred to the district heating network. After repeated filtration, the cooled brine is reinjected back into the underground.

Due to the strong mineralisation of the thermal brine and the high gas content, there is a significantly increased corrosion potential for the site as well as the possibility of particle formation. These problems do not only have an influence on the thermal water loop, but can also massively affect the capacity of the injection horizon. Plastic inserts and special coatings for thermal water loop were therefore used to protect the process safety. In addition, suitable filtration and gas systems as well as a complex pressure maintenance system were installed.

Since there were summer heat surpluses, the system was supplemented in 2004 within the scope of a research topic by an ORC power generation unit. This research unit had a generating capacity of up to 300 kW_el , but has now been dismantled. A 140 kW_el cogeneration unit has taken over the own power generation fort he drive oft he thermal water loop.

Building: © WEMAG/Stephan Rudolph-Kramer

Schem: © Teamgeist Medien GbR