De que é feito pumped-storage station
Stores energy by pumping water uphill.
- Water turbine — tem como parte. Reversible hydro units.
- Electric generator — tem como parte. At night pumps lift water uphill; by day it runs back down through turbines and generators.
- Universal gravitation — utiliza. Energy is stored as the height of water.
- Concreto — é feito de. The reservoirs and dam are concrete.