IPC분류정보
국가/구분 |
United States(US) Patent
등록
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국제특허분류(IPC7판) |
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출원번호 |
US-0217713
(2011-08-25)
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등록번호 |
US-8347600
(2013-01-08)
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발명자
/ 주소 |
- Wichmann, Lisa Anne
- Snook, Daniel David
- Dion Ouellet, Noémie
- Rittenhouse, Scott Allen
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출원인 / 주소 |
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대리인 / 주소 |
Sutherland Asbill & Brennan LLP
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인용정보 |
피인용 횟수 :
60 인용 특허 :
52 |
초록
▼
At least one main air compressor makes a compressed ambient gas flow. The compressed ambient gas flow is delivered to both master and slave turbine combustors at a pressure that is greater than or substantially equal to an output pressure delivered to each turbine combustor from each turbine compres
At least one main air compressor makes a compressed ambient gas flow. The compressed ambient gas flow is delivered to both master and slave turbine combustors at a pressure that is greater than or substantially equal to an output pressure delivered to each turbine combustor from each turbine compressor as at least a first portion of a recirculated gas flow. A fuel stream is delivered to each turbine combustor, and combustible mixtures are formed and burned, forming the recirculated gas flows. A master and slave turbine power are produced, and each is substantially equal to at least a power required to rotate each turbine compressor. At least a portion of the recirculated gas flow is recirculated through recirculation loops. At least a second portion of the recirculated gas flow bypasses the combustors or an excess portion of each recirculated gas flow is vented or both.
대표청구항
▼
1. A method for operating a power plant at constant speed no load, comprising: compressing ambient air with at least one main air compressor to make a compressed ambient gas flow;delivering at least a first portion of the compressed ambient gas flow having a first compressed ambient gas flow rate fr
1. A method for operating a power plant at constant speed no load, comprising: compressing ambient air with at least one main air compressor to make a compressed ambient gas flow;delivering at least a first portion of the compressed ambient gas flow having a first compressed ambient gas flow rate from the at least one main air compressor to a master turbine combustor at a pressure that is greater than or substantially equal to an output pressure delivered to the master turbine combustor from a master turbine compressor as at least a first portion of a master recirculated gas flow having a master recirculated gas flow rate;delivering at least a second portion of the compressed ambient gas flow having at least a second compressed ambient gas flow rate from the at least one main air compressor to at least one slave turbine combustor at a pressure that is greater than or substantially equal to an output pressure delivered to the at least one slave turbine combustor from at least one slave turbine compressor as at least a first portion of a slave recirculated gas flow having at least one slave recirculated gas flow rate;delivering a master fuel stream to the master turbine combustor with a master fuel flow rate, wherein the master fuel flow rate, the first compressed ambient gas flow rate, and the master recirculated gas flow rate are sufficient to maintain combustion;delivering at least one slave fuel stream to the at least one slave turbine combustor with at least one slave fuel flow rate, wherein the at least one slave fuel flow rate, the at least one second compressed ambient gas flow rate, and the at least one slave recirculated gas flow rate are sufficient to maintain combustion;mixing the at least a first portion of the compressed ambient gas flow with the at least a first portion of a master recirculated gas flow and with the master fuel stream in the master turbine combustor to form a master combustible mixture;mixing the at least a second portion of the compressed ambient gas flow with the at least a first portion of the at least one slave recirculated gas flow and with the at least one slave fuel stream in the at least one slave turbine combustor to form at least one slave combustible mixture;burning the master combustible mixture in the master turbine combustor to form the master recirculated gas flow;burning the at least one slave combustible mixture in the at least one slave turbine combustor to form the at least one slave recirculated gas flow;driving a master turbine connected to the master turbine combustor using the master recirculated gas flow, such that the master turbine and a master turbine compressor rotate, and produce a master turbine power that is substantially equal to at least a power required to rotate the mater turbine compressor;driving at least one slave turbine connected to the at least one slave turbine combustor using the at least one slave recirculated gas flow, such that the at least one slave turbine and at least one slave turbine compressor rotate, and produce at least one slave turbine power that is substantially equal to a power required to rotate the at least one slave turbine compressor;recirculating at least a portion of the master recirculated gas flow through a master recirculation loop, wherein the at least a portion of the master recirculated gas flow is recirculated from the master turbine to the master turbine compressor;recirculating at least a portion of the at least one slave recirculated gas flow through a slave recirculation loop, wherein the at least a portion of the at least one slave recirculated gas flow is recirculated from the at least one slave turbine to the at least one slave turbine compressor;bypassing the master turbine combustor with at least a second portion of the master recirculated gas flow as a master bypass flow having a master bypass flow rate and adjusting the master bypass flow rate or venting an excess portion of the master recirculated gas flow between an output of the master turbine compressor and an input to the master turbine compressor or both; andbypassing the at least one slave turbine combustor with at least a second portion of the at least one slave recirculated gas flow as at least one slave bypass flow having at least one slave bypass flow rate and adjusting the at least one slave bypass flow rate or venting an excess portion of the at least one slave recirculated gas flow between an output of the at least one slave turbine compressor and an input to the at least one slave turbine compressor or both; and operating the power plant in start-up mode at constant speed no load. 2. The method of claim 1, further comprising: delivering the at least a first portion of the compressed ambient gas flow from the at least one main air compressor to a master booster compressor, wherein the master booster compressor is fluidly connected to the downstream side of the at least one main air compressor and fluidly connected to the upstream side of the master turbine combustor, and delivering a master booster compressor exhaust to the master turbine combustor; anddelivering the at least a second portion of the compressed ambient gas flow from the at least one main air compressor to at least one slave booster compressor, wherein the at least one slave booster compressor is fluidly connected to the downstream side of the at least one main air compressor and fluidly connected to the upstream side of the at least one slave turbine combustor, and delivering at least one slave booster compressor exhaust to the at least one slave turbine combustor. 3. The method of claim 1, further comprising: delivering a master secondary flow through a master secondary flow path, wherein the master secondary flow path delivers at least a third portion of the master recirculated gas flow from the master turbine compressor to the master turbine for cooling and sealing the master turbine and thereafter into the master recirculation loop; anddelivering at least one slave secondary flow through at least one slave secondary flow path, wherein the at least one slave secondary flow path delivers at least a third portion of the at least one slave recirculated gas flow from the at least one slave turbine compressor to the at least one slave turbine for cooling and sealing the at least one slave turbine and thereafter into the at least one slave recirculation loop. 4. The method of claim 1, further comprising adjusting a plurality of inlet guide vanes of the at least one main air compressor to regulate the pressure of the at least a first portion of the compressed ambient gas flow that is delivered to the master turbine combustor. 5. The method of claim 1, further comprising: adjusting a plurality of inlet guide vanes of the master turbine compressor to regulate the output pressure delivered to the master turbine combustor from the master turbine compressor as the at least a first portion of a master recirculated gas flow; andadjusting a plurality of inlet guide vanes of the at least one slave turbine compressor to regulate the output pressure delivered to the at least one slave turbine combustor from the at least one slave turbine compressor as the at least a first portion of a slave recirculated gas flow. 6. The method of claim 1, further comprising adjusting the master fuel flow rate, the slave fuel flow rate, or both. 7. The method of claim 1, further comprising: Adjusting the master bypass flow rate such that the output pressure delivered to the master turbine combustor from the master turbine compressor is less than or equal to the pressure of the at least a first portion of the compressed ambient gas flow delivered to the master combustor from the at least one main air compressor; andadjusting the at least one slave bypass flow rate such that the output pressure delivered to the at least one slave turbine combustor from the at least one slave turbine compressor is less than or equal to the pressure of the at least a second portion of the compressed ambient gas flow delivered to the at least one slave turbine combustor from the at least one main air compressor. 8. The method of claim 1, wherein the at least one main air compressor is driven by rotation of a master turbine shaft that is mechanically connected to the master turbine and the master turbine compressor. 9. The method of claim 8, wherein the master turbine power is substantially equal to the power required to rotate the master turbine compressor and a power required to drive the at least one main air compressor. 10. The method of claim 1, further comprising: passing the master recirculated gas flow from the master turbine to a master heat recovery steam generator in the master recirculation loop, wherein the master heat recovery steam generator is configured to generate electricity using a master steam turbine and a master steam generator; andpassing the at least one slave recirculated gas flow from the slave turbine to a slave heat recovery steam generator in the slave recirculation loop, wherein the slave heat recovery steam generator is configured to generate electricity using a slave steam turbine and a slave steam generator. 11. The method of claim 1, further comprising: venting an excess portion, if any, of the at least a first portion of the compressed ambient gas flow between an output of the at least one main air compressor and an input of the master turbine combustor; andventing an excess portion, if any, of the at least a second portion of the compressed ambient gas flow between an output of the at least one main air compressor and an input of the at least one slave turbine combustor. 12. The method of claim 1, wherein: the master bypass flow is fluidly connected to and delivered to the master recirculation loop downstream of the master turbine; andthe at least one slave bypass flow is fluidly connected to and delivered to the at least one slave recirculation loop downstream of the at least one slave turbine. 13. The method of claim 1, wherein: the master bypass flow is fluidly connected to a master extraction valve and at least a portion of the master bypass flow is delivered to at least one master secondary process; andthe at least one slave bypass flow is fluidly connected to at least one slave extraction valve and at least a portion of the at least one slave bypass flow is delivered to at least one slave secondary process. 14. A method for operating a power plant, comprising: compressing ambient air with at least one main air compressor to make a compressed ambient gas flow;delivering at least a first portion of the compressed ambient gas flow from the at least one main air compressor to a master turbine combustor;delivering at least a second portion of the compressed ambient gas flow from the at least one main air compressor to at least one slave turbine combustor;mixing the at least a first portion of the compressed ambient gas flow with at least a first portion of a master recirculated gas flow and with a master fuel stream to form a master combustible mixture in the master turbine combustor;mixing the at least a second portion of the compressed ambient gas flow with at least a first portion of at least one slave recirculated gas flow and with at least one slave fuel stream to form at least one slave combustible mixture in the at least one slave turbine combustor;burning the master combustible mixture in the master turbine combustor to form the master recirculated gas flow;burning the at least one slave combustible mixture in the at least one slave turbine combustor to form the at least one slave recirculated gas flow;driving a master turbine connected to the master turbine combustor using the master recirculated gas flow, such that the master turbine and a master turbine compressor rotate, and produce a master turbine power;driving at least one slave turbine connected to the at least one slave turbine combustor using the at least one slave recirculated gas flow, such that the at least one slave turbine and at least one slave turbine compressor rotate, and produce at least one slave turbine power;recirculating at least a portion of the master recirculated gas flow through a master recirculation loop, wherein the at least a portion of the master recirculated gas flow is recirculated from the master turbine to the master turbine compressor;recirculating at least a portion of the at least one slave recirculated gas flow through at least one slave recirculation loop, wherein the at least a portion of the at least one slave recirculated gas flow is recirculated from the at least one slave turbine to the at least one slave turbine compressor;bypassing the master turbine combustor with at least a second portion of the master recirculated gas flow as a master bypass flow having a master bypass flow rate and adjusting the master bypass flow rate or venting an excess portion, if any, of the master recirculated gas flow between an output of the master turbine compressor and an input to the master turbine compressor or both; andbypassing the at least one slave turbine combustor with at least a second portion of the at least one slave recirculated gas flow as at least one slave bypass flow having at least one slave bypass flow rate and adjusting the at least one slave bypass flow rate or venting an excess portion, if any, of the at least one slave recirculated gas flow between an output of the at least one slave turbine compressor and an input to the at least one slave turbine compressor or both. 15. The method of claim 14, further comprising: delivering the at least a first portion of the compressed ambient gas flow from the at least one main air compressor to a master booster compressor, wherein the master booster compressor is fluidly connected to the downstream side of the at least one main air compressor and is fluidly connected to the upstream side of the master turbine combustor, and delivering a master booster compressor exhaust to the master turbine combustor; anddelivering the at least a second portion of the compressed ambient gas flow from the at least one main air compressor to at least one slave booster compressor, wherein the at least one slave booster compressor is fluidly connected to the downstream side of the at least one main air compressor and is fluidly connected to the upstream side of the at least one slave turbine combustor, and delivering at least one slave booster compressor exhaust to the at least one slave turbine combustor. 16. The method of claim 14, further comprising: delivering a master secondary flow through a master secondary flow path, wherein the master secondary flow path delivers at least a third portion of the master recirculated gas flow from the master turbine compressor to the master turbine for cooling and sealing the master turbine and thereafter into the master recirculation loop; anddelivering at least one slave secondary flow through at least one slave secondary flow path, wherein the at least one slave secondary flow path delivers at least a third portion of the at least one slave recirculated gas flow from the at least one slave turbine compressor to the at least one slave turbine for cooling and sealing the at least one slave turbine and thereafter into the at least one slave recirculation loop. 17. The method of claim 14, wherein: the master bypass flow is fluidly connected to and delivered to the master recirculation loop downstream of the master turbine; andthe at least one slave bypass flow is fluidly connected to and delivered to the at least one slave recirculation loop downstream of the at least one slave turbine. 18. The method of claim 14, further comprising: venting an excess portion, if any, of the at least a first portion of the compressed ambient gas flow between an output of the at least one main air compressor and an input of the master turbine combustor; andventing an excess portion, if any, of the at least a second portion of the compressed ambient gas flow between an output of the at least one main air compressor and an input of the at least one slave turbine combustor. 19. The method of claim 14, wherein: the master turbine power is used to rotate a master turbine shaft configured to generate electricity when rotated in a master turbine generator; andthe at least one slave turbine power is used to rotate at least one slave turbine shaft configured to generate electricity when rotated in at least one slave turbine generator. 20. The method of claim 19, wherein electricity is generated using substantially stoichiometric combustion.
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