Thermal energy storage technologies need to be developed and become an integral component in the future energy system infrastructure to meet variations in both the availability and demand of energy. The main objectives of this project are to lower the cost, reducing the risks and to optimize performance of high temperature (~25 to ~90°C) underground thermal energy storage technologies by demonstrating 6 distinct configurations of heat sources, heat storage, and heat utilization. Technical, economic, environmental, regulatory and policy aspects will be addressed that are necessary to support efficient and cost-effective deployment in Europe. The project will stimulate fast-track market uptake in Europe promoting development from demonstration phase to commercial deployment within 2 to 5 years on the European market and provide an outlook towards utilization of full potential in 2050.

Project website


Institution/enterprise Country
TNO - Nederlandse organisatie voor toegepast natuurwetenschappelijk onderzoek Netherlands
Energie Wasser Bern Switzerland
SIG Switzerland
IF Technology Netherlands
KWR Watercycle Research Institute Netherlands
ECW Geomanagement BV Netherlands
University of Geneva Switzerland
Eidgenössische Technische Hochschule Zurich Switzerland
University of Neuchatel Switzerland
University of Bern Switzerland
BRGM France
Storengy France
Bochum University of Applied Sciences / International Geothermal Centre Germany
GEUS Denmark
PlanEnergi Denmark
VITO Belgium
University of the Azores Portugal
Reykjavik Energy Iceland
delta-h Engineering GmbH Germany
Noda GmbH Germany
SPIE Belgium Belgium
Kempens Warmtebedrijf Belgium
Universitat Politécnica de Catalunya Spain
Netherlands Institute of Ecology Netherlands


  Geothermica financing Total cost  Own financing
HEATSTORE - Total financing  8.305.268 16.265.971 7.960.703