IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0606761
(2009-10-27)
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등록번호 |
US-8341964
(2013-01-01)
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발명자
/ 주소 |
- Finkenrath, Matthias
- Naidu, Balachandar
- Booth, Charles Michael
- Ferguson, Garland
- Hoffmann, Stephanie Marie-Noelle
- Freund, Sebastian W.
|
출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
9 인용 특허 :
9 |
초록
▼
A power generation system includes a first compressor, a second compressor, a combustor configured to receive compressed air from the second compressor to produce an exhaust stream, a first turbine, and a power turbine. The first turbine is configured to receive the exhaust stream, generate a rotati
A power generation system includes a first compressor, a second compressor, a combustor configured to receive compressed air from the second compressor to produce an exhaust stream, a first turbine, and a power turbine. The first turbine is configured to receive the exhaust stream, generate a rotational power from the exhaust stream, output the rotational power to a second compressor, and output the exhaust stream. The system includes a coupling device configured to couple and decouple the first compressor to/from a second turbine, an electrical generator coupled to an output of the power turbine and configured to output electrical power, and a controller configured to cause the coupling device to mechanically decouple the second turbine from the first compressor, and cause the coupling device to direct compressed air from an air storage cavern to an inlet of the second compressor.
대표청구항
▼
1. A power generation system comprising: a first compressor configured to compress air to a first pressure via a first rotational power;a second compressor configured to compress air to a second pressure via a second rotational power, wherein the second pressure is greater than the first pressure;a
1. A power generation system comprising: a first compressor configured to compress air to a first pressure via a first rotational power;a second compressor configured to compress air to a second pressure via a second rotational power, wherein the second pressure is greater than the first pressure;a combustor configured to receive the compressed air from the second compressor and combust a flammable fluid therewith to produce an exhaust stream;a first turbine configured to: receive the exhaust stream from the combustor;generate the second rotational power from the exhaust stream;output the second rotational power to the second compressor; andoutput the exhaust stream;a power turbine configured to: receive the exhaust stream from the first turbine; andgenerate a third rotational power therefrom;a coupling device configured to couple the first compressor to a second turbine and to decouple the first compressor from the second turbine;an electrical generator coupled to an output of the power turbine and configured to output a first electrical power from the third rotational power; anda controller configured to: cause the coupling device to mechanically decouple the second turbine from the first compressor in a first operating mode; andcause a valve on an air cavern outlet line to open to direct compressed air from an air storage cavern to an inlet of the second compressor during the first operating mode. 2. The system of claim 1 further comprising a heat exchanger configured to extract heat from the exhaust stream to heat the compressed air from the air storage cavern, wherein the power turbine is configured to output the exhaust stream to the heat exchanger. 3. The system of claim 1 wherein the controller is further configured to: cause the coupling device to mechanically couple the second turbine to the first compressor in a second operating mode to provide the first rotational power to the first compressor from the second turbine; andcause a valve on an air cavern bypass line to open to direct the compressed air from the first compressor to the inlet of the second compressor during the second operating mode. 4. The system of claim 3 wherein the coupling device is a first clutch coupled between the first compressor and the second turbine, wherein the clutch is controlled by the controller to respectively mechanically couple and decouple the second turbine to and from the first compressor. 5. The system of claim 3 further comprising a first motor mechanically coupled to the first compressor; and wherein, when the second turbine is mechanically decoupled from the first compressor, the controller is configured to: provide the first rotational power to the first compressor via the first motor to compress air to the first pressure; anddirect the compressed air from the first compressor into the air storage cavern via an air cavern inlet line. 6. The system of claim 5 further comprising: a second motor; anda third compressor coupled to the second motor, the third compressor configured to: draw power from the second motor;receive the compressed air from the first compressor;further compress the compressed air to a third pressure that is greater than the first pressure; andoutput the further compressed air to the air storage cavern. 7. The system of claim 6 further comprising an intercooler positioned between the first compressor and the third compressor, the intercooler configured to extract heat from the compressed air passing from the first compressor. 8. The system of claim 6 further comprising a third turbine configured to: receive the further compressed air from the air storage cavern;expand the received air and generate rotational power therefrom; andpass the expanded air to the inlet of the second compressor. 9. The system of claim 8 further comprising a second clutch positioned between the third compressor and the third turbine to mechanically couple the third compressor to the third turbine, such that when the rotational power is generated in the third turbine, the rotational power is transmitted to the second motor via the third compressor such that the second motor generates electrical power therefrom. 10. The system of claim 8 further comprising a thermal energy storage (TES) unit positioned to receive the further compressed air from the third compressor prior to the further compressed air being output to the air storage cavern, wherein the TES is configured to extract and store a heat of compression from the further compressed air, and wherein the compressed air exiting from the air storage cavern is passed through the TES to receive the stored heat of compression therefrom. 11. The system of claim 10 wherein the controller is configured to measure a temperature of compressed air exiting the TES and adjust a temperature thereof prior to the air entering the second compressor. 12. A method of operating a power generation system, the method comprising: combusting one of a first stream of air and a second stream of air with fuel in a combustor to generate exhaust products;coupling a first compressor to a second turbine, and while the first compressor is coupled to the second turbine:rotating the first compressor and the second turbine using power from the exhaust products;coupling a second compressor to a first turbine;providing the first stream of air that is compressed in the first compressor to an inlet of the second compressor;pressurizing the first stream of air in the second compressor; andgenerating electricity using the exhaust products that are generated from the combustion using the first stream of air; anddecoupling the first compressor from the second turbine, and while the first compressor is decoupled from the second turbine:extracting a second stream of air from an air storage cavern;providing the second stream of air to the inlet of the of the second compressor;pressurizing the second stream of air in the second compressor; and generating electricity using the exhaust products that are generated from the combustion using the second stream of air. 13. The method of claim 12 wherein the steps of generating electrical power using exhaust products from either the first stream of air or the second stream of air include: passing one of the first stream of air and the second stream of air from the second compressor to the combustor;combusting a flammable fluid in the combustor using at least the passed stream of air and the flammable fluid to generate the exhaust products;generating turbine power in a power turbine from the exhaust products; andgenerating the electrical power in a generator that is coupled to the power turbine. 14. The method of claim 12 wherein, when the first compressor is decoupled from the second turbine, the method further comprises: rotating the first compressor using power from an electrical motor to generate a third stream of air; andpassing the third stream of air to the air storage cavern. 15. The method of claim 14 further comprising rotating a third compressor and passing the third stream of air therethrough prior to passing the third stream of air to the air storage cavern. 16. A controller configured to: cause a coupling device to mechanically couple a first compressor to a second turbine, and while the first compressor and the second turbine are coupled:direct a first airstream from an outlet of the first compressor to an inlet of a second compressor, wherein the second compressor is coupled to a first turbine;direct the first airstream from the second compressor to a combustor to generate an exhaust stream; anddirect the exhaust stream to a power turbine to generate electricity therefrom; andcause the coupling device to mechanically decouple the first compressor from the second turbine, and while the first compressor and the second turbine are decoupled:direct a second airstream from the outlet of the first compressor to an air storage volume. 17. The controller of claim 16 wherein, when the first compressor is mechanically decoupled from the second turbine, the controller is further configured to: direct a third airstream from the air storage volume to an expansion turbine;extract electrical power from the expansion turbine; anddirect the third airstream to the combustor. 18. The controller of claim 16 wherein, when the first compressor is mechanically decoupled from the second turbine, the controller is further configured to: direct a third airstream from the air storage volume to the second compressor;direct the third airstream from the second compressor to the combustor to generate the exhaust stream; anddirect the exhaust stream to the power turbine to generate the electricity therefrom via a first generator. 19. The controller of claim 18 wherein the controller is further configured to: direct the third airstream from the air storage volume to an expansion turbine;extract electrical power from the expansion turbine via a second generator; anddirect the third airstream from the expansion turbine to the second compressor. 20. The controller of claim 19 wherein the controller is configured to direct the exhaust stream from the power turbine to a heat exchanger that is configured to heat the third airstream from the air storage volume prior to the third airstream entering the expansion turbine. 21. The controller of claim 16 wherein, when the first compressor is mechanically decoupled from the second turbine, the controller is further configured to: direct the second airstream from the outlet of the first compressor to an inlet of a third compressor; andpass the second airstream from the third compressor to the air storage volume.
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