Dispatchable combined cycle power plant
OwnerWilliam M. Conloninventor
Life of this patent
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Abstract
A combined cycle power plant comprises a combustion turbine generator, another heat source in addition to the combustion turbine generator, a steam power system, and an energy storage system. Heat from the heat source, from the energy storage system, or from the heat source and the energy storage system is used to generate steam in the steam power system. Heat from the combustion turbine generator exhaust gas may be used primarily for single phase heating of water or steam in the steam power system. Alternatively, heat from the combustion turbine generator exhaust gas may be used in parallel with the energy storage system and/or the other heat source to generate steam, and additionally to super heat steam. Both the combustion turbine generator and the steam power system may generate electricity.
Claims18
A combined cycle electric power plant comprising:
- a combustion turbine generator that combusts fuel to generate electricity and produce hot exhaust gases;
- a second heat source other than the combustion turbine;
- a thermal energy storage system that stores heat transferred from the second heat source;
- a steam turbine generator that expands superheated steam across a steam turbine to generate electricity;
- a first boiler;
- and
- a superheater;
- wherein the combined cycle electric power plant has a first mode of operation in which the superheated steam is produced by heating condensate from the steam turbine generator primarily with heat from the combustion turbine exhaust gases to produce hot liquid feedwater, boiling the hot liquid feedwater in the first boiler with heat primarily from the second heat source, from the thermal energy storage system, or from the second heat source and the thermal energy storage system to produce steam, and superheating the steam in the superheater primarily with additional heat from the combustion turbine exhaust gases.
Dependencies are inferred from the claim text.