Flywheels on the road
Another technology now being used on the grid is flywheels, which store electric energy from the grid as kinetic energy in spinning discs. Flywheels cannot store a lot of energy, but they can quickly deliver bursts on and off the grid to maintain a steady frequency and they don't take up a lot of space. In another DOE-backed project, this technology is being used in the New York grid for 20 megawatts' worth of power using 200 flywheels. Here is a picture of the flywheels being delivered before installation.
September 17, 2010 4:00 AM PDT
Photo by: Beacon Power
| Caption by: Martin LaMonica
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