Dungowan Pumped Hydro Energy Storage Project

Pumped Hydro Energy Storage

Hills

Storing Energy By Using Water

Pumped hydro energy storage (PHES) is a method of storing energy by using water. It involves two reservoirs located at different elevations, typically one at a higher altitude than the other.

During times of excess energy production, such as periods of low demand or high renewable energy generation, surplus electricity is used to pump water from the lower reservoir to the higher one, effectively storing the energy as gravitational potential energy.

When electricity demand rises, water is released from the higher reservoir back to the lower one, passing through turbines that generate electricity as it flows downhill.

St Pierre Cognet
Blue lines

PHES Systems

PHES systems are highly efficient and can provide large-scale energy storage capacity, making them valuable assets for balancing the intermittent nature of renewable energy sources and ensuring grid stability.

The Beaufortain hydraulic dams, UP Alpes, GEH Savoie Mont Blanc