PlanEnergi Showcases TREASURE at EuroGeo 8
The 8th European Conference on Geosynthetics (EuroGeo 8) took place on 15–18th September 2025 in Lille, France, bringing together researchers, engineers, and sustainability experts under the theme Technical Challenges and Environmental Imperatives for the 21st Century. Organized by the French Chapter of the International Geosynthetics Society (IGS), EuroGeo 8 continues a long tradition of advancing the use of geosynthetics in modern engineering and environmental protection. The conference provided a platform for sharing the latest innovations in design, materials, and applications that support more sustainable infrastructure development.
The TREASURE project contributed to this year’s discussions with the presentation “Geosynthetics, a Key Brick of the Energy Transition,” authored by Hendrik Wetzel and Per Alex Sørensen (PlanEnergi, Denmark), Wim van Helden (AEE INTEC, Austria), and Vincent Micollier (Vinci Construction, France). Their work highlights the crucial role of geosynthetic products in the development of Pit Thermal Energy Storage (PTES) systems — one of the most promising solutions for integrating renewable energy into heating networks.
By ensuring the reliable and efficient waterproofing of large-scale storage pits, geosynthetics enable the long-term, high-capacity storage of solar and wind energy in the form of heat, supporting Europe’s zero-carbon energy system ambitions. With a potential of 35–110 TWh of thermal storage capacity across the continent, the future demand for geomembranes and related products could reach 160–600 million m², underscoring the significant industrial and environmental relevance of this innovation.
Photo credits go to ©Barbara Grossmann
If you want to know more, read the full article on how TREASURE and its partners are advancing the energy transition through smart materials and storage design.