FlexGeo – Shaping the future of FLEXible GEOthermal energy – is a European collaborative project funded by the Horizon Europe Framework Program for Research and Innovation (Sustainable, secure and competitive energy supply – HORIZON-CL5-2023-D3-02).

It brings together a total of 11 partners from 7 countries in order to demonstrate the potential of the flexible use of geothermal energy using reversible Organic Rankine Cycle (ORC) / high-temperature heat pump (HTHP) technology. Within the project, a major focus will lie on the worldwide first demonstration of a reversible 200 kWel modular ORC system on a TRL 7 level. Additionally, advanced control strategies for district heating and cooling networks (DHCN) are being developed and demonstrated.

The primary goal of the project is to deliver sustainable solutions for the stabilization and optimization of DHCN systems across Europe and to pave the way for the market entry of commercial modular reversible ORC systems. The obtained results will significantly enhance the use of both shallow and deep geothermal energy, thereby supporting the European Union’s efforts to achieve net-zero greenhouse gas emissions.