Power generation plant with compressed air energy system
AssigneeALSTOM Technology Ltd
InventorRalf Gerdes
Life of this patent
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Abstract
A power generation plant with a compressed air energy storage system comprises a means to reduce the pressure of air extracted from a compressed air storage cavern for the use in a combustion turbine. The means to reduce the air pressure comprises at least one expansion turbine and means to control the size of pressure reduction. Furthermore, the expansion turbine is arranged on a rotor shaft that drives a generator. The means for pressure redact, according to the invention, avoid power losses and provide an increased overall efficiency of the power generation plant.
Claims12
A power generation plant comprising a compressed air energy storage system with a cavern for the storage of compressed air, at least one combustion turbine arranged on a first rotor shaft that drives a first generator, and means for reducing the pressure of air extracted from the air storage cavern for the use in the at least one combustion turbine wherein
- the means for reducing the pressure of the extracted air comprises one or several expansion turbines arranged on the first rotor shaft or on a second rotor shaft that drives a second generator and several lines, each of the several lines having a valve, and the several lines being arranged in parallel to one another and all lines lead from the air storage cavern to the one or several expansion turbines or the several lines arranged in parallel to one another each lead from a different section of the one expansion turbine to the at least one combustion turbine.
Dependencies are inferred from the claim text.