Oak Ridge National Laboratory Explores Abandoned Mines in the US as Water Battery Storage
At Oak Ridge National Laboratory in Tennessee, researchers are exploring the conversion of abandoned coal mines into underground energy storage systems utilizing pumped-storage hydroelectricity. This technology, often referred to as a 'water battery,' involves moving water between reservoirs at varying altitudes.
The initiative aims to overcome geographical limitations of traditional installations, enabling energy storage in flatter areas. However, challenges such as chemical erosion and structural stability must be addressed.
Advanced modeling tools are being developed to simulate water circulation and assess chemical reactions, while a techno-economic analysis is in progress to determine project viability. If successful, this could enhance long-term electricity storage for renewable energy.
