Importance

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Abstract

A method is provided for storing energy including the steps of: during a time period when electrical energy is available at low prices, pumping water from a lower reservoir to a reservoir at a higher elevation wherein the difference between the elevation of the higher reservoir and the lower reservoir is at least 100 meters; during a time period when electrical energy is available at a higher price, utilizing a Pelton turbine to generate mechanical energy using the difference between the potential energy of the water at the higher reservoir and the lower reservoir and thereby transferring water from the higher reservoir to the lower reservoir; converting the mechanical energy to electrical energy; and when the mechanical power is not being generated, maintaining the Pelton turbine in a spinning stand-by mode.

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First Claim