In Pornainen, Finland, a massive sand battery built from repurposed crushed soapstone became operational this June, establishing a new milestone in global energy storage innovation. This groundbreaking system converts surplus solar and wind power into thermal energy reaching 500°C, and store it long-term in a highly efficient insulated tower.
The stored thermal energy not only supports district heating throughout the town but also extends to certain industrial processes, significantly reducing reliance on fossil fuels. Results include complete elimination of oil dependency, 60% reduction in wood consumption, conversion of biomass boilers to backup systems, and nearly 70% decrease in overall carbon emissions—exemplifying low-carbon energy supply.
Sand Battery Innovation
Unlike traditional batteries, sand batteries store thermal energy. When excess renewable electricity is available, electric heaters warm sand to approximately 500°C within insulated towers. Sand’s slow thermal conductivity becomes an advantage—providing exceptional heat retention that preserves energy for weeks or months. The system then releases this stored heat through heat exchangers to meet residential, commercial, and industrial heating demands, providing a stable, low-carbon, and economically viable energy storage solution.
From Circular Economy to Sustainable Energy Storage
·Industrial Waste Reuse: Constructing thermal storage towers using crushed soapstone and other industrial byproducts, reducing raw material extraction
·Independence from Rare Metals: No requirement for lithium, cobalt, or other rare minerals, reducing environmental and supply chain risks
·High Cost-Effectiveness: Inexpensive raw materials and long system lifespan, suitable for large-scale renewable energy integration
·Zero Pollution Emissions: Completely non-toxic and harmless process, supporting corporate net-zero carbon goals
Seize Key Green Transformation
(Button: Register Now) TASS2025
Sand batteries are redefining energy storage, opening the door to groundbreaking shifts in global energy and industrial transformation. As Taiwan’s premier exhibition dedicated to sustainable supply chains and circular economy solutions, TASS2025 brings together government officials, industry leaders, and technology innovators, creating the ultimate platform for cross-sector collaboration, and strategic partnerships. Join us at TASS2025 and claim your place at the forefront of the green economy!
