Advancing the future
Key innovations developed and tested within the research project
A total 1375 meters fibre-optic monitoring system for leak detecting and temperature monitoring has been integrated within one storage structure
Innovative charging and discharging pipes inclusive diffusers to reduce water treatment requirements and improve overall cost and system efficiency
High-temperature-resistant geomembranes and protection layers providing long-term thermal stability up to 95°C
Polymeric penetrations for cost reductions and secure and simplified connection of the sealing geomembranes
A floating lid solution with excellent insulation properties and an integrated system for draining and precipitation water
Geosynthetic-reinforced soil enabling steeper embankments and thus improving the volume-to-surface ratio
A high-density, multi-parameter sensor network enabling continuous acquisition, processing, and evaluation of thermal and structural storage data, centrally managed via the operations building
Use of process heat from geomembrane manufacturing to charge the storage system up to 95°C
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Case studies
Decarbonizing district heating with pit thermal energy storage in Meldorf
Germany’s first large commercial pit thermal storage in Meldorf shows how district heating can be decarbonized. GSE® HDH, GSE HD liners and FABRINET® protection layers enable safe high-temperature storage, reducing CO₂ emissions by 90 percent and store 1,500 MWh annually.
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Case studies
Seasonal pit thermal energy storage drives fossil-free heating in Bracht
In Bracht, Germany, a pit thermal storage system integrated with solar collectors (71 percent from sun), heat pumps (6 percent green electricity), and biomass (23 percent) supplies a renewable heat solution according to the simulation of the University Kassel. Solmax geomembranes ensure long-term containment, enabling near-zero emissions and stable heating for 180 households.
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Case studies
Seasonal solar storage brings fossil-free heating to Tibet
On the Tibetan Plateau at 4,600 m ASL, Solmax geosynthetics enabled Tibet’s first large solar thermal district heating system. A 15,000 m³ pit thermal energy storage stores 700 MWh of heat, meeting 90 percent of Langkazi’s demand.
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