Delta21 is a future-proof solution for the Dutch Delta. The concept entails an Energy Storage Lake of 20 km2, where energy is temporarily stored and generated with multiple renewable power solutions. A spatial design with three ambitions makes Delta21 unique: Flood Safety, Energy Storage/Generation and Nature Restoration. Flood Safety is achieved by realising a large pump capacity in a lake, surrounded by dunes. For flood safety, the pumps are used only during severe storm events in combination with high river discharges. Under normal circumstances, the pumps/turbines with a total capacity of 1,8 GW are used daily for peakshaving by storing and generating energy. The concept can easily be combined with other renewable energy types, such as (floating) solar energy, aquabatteries, tidal energy, wind parks and heat storage.
The concept was invented by financial expert Leen Berke and coastal engineer Huub Lavooij and is supported by 16 enterprises, universities and governmental entities.