A plant in a former salt mine in Goderich, Ont., billed as the
world s first emission-free compressed air facility. It can feed 10 megawatts of power into the grid for up to five hours.
A smaller demonstration that
Flywheels
Flywheels (or rotors) spin at very high rates (up to 50,000 revolutions per minute), typically in a vacuum so air friction doesn t slow them down. Power is stored as kinetic energy by using a motor to accelerate the flywheels, and energy can be discharged by reversing the process so the flywheel drives a motor or some other electrical generation device.
While this can happen very quickly compared to other types of energy storage, flywheels are not good for long-term storage, but work well to balance supply and demand on a short-term basis.
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