As part of the GeoSonde 400+ R&D project, strategies are being developed for implementing systems for the use of geothermal energy in shallow and medium-depth areas. In addition to investigating the implementation of geothermal sources in combination with other renewable energy sources for district heating, approaches to tapping geothermal energy are also being analyzed.
As part of the investigation into the higher efficiency of geothermal systems, the project presented is developing an integrative concept for thermosiphon-based geothermal probes at medium depths (approx. 400 m), which can be used in particular in remote areas where the conditions for the implementation of powerful hydrothermal systems are not met.
Furthermore, a model study presents an approach for the central heat supply of a typical rural settlement with 400 inhabitants in 75 households using medium-depth geothermal energy/heat pumps and electric boilers powered by locally generated wind energy.