Siemens Gamesa Renewable Energy (SGRE) has commissioned a pilot electric thermal energy storage system (ETES) in Hamburg-Altenwerder, Germany.
– Storage capacity: 130 MWh for a week. Scaling into the GWh range is possible.
– Storage material: 1,000 ton volcanic rock.
– Storage temperature: 750°C/1382 °F.
– Efficiency: up to 50% (25% total cycle efficiency Hamburg pilot).
– Capital expenditure is up to ten times lower than batteries.
Efficiency is lower than with pumped hydro-storage, the trade-off is lower installation cost.
[siemensgamesa.com] – World first: Siemens Gamesa begins operation of its innovative electrothermal energy storage system
[windenergietage.de] – Electric Thermal Energy Storage (ETES)
[ec.europa.eu] – ETES Energy storage to the next level
[cleantechnica.com] – Siemens Gamesa Unveils World First Electrothermal Energy Storage System