Patent FR715899A successfully refreshed from Google Patents.
US6494045B2
Expired / Lapsed
US
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High density combined cycle power plant process
Assignee: Individual
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Filing: 2001-02-14
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Granted: 2002-12-17
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Expires: 2021-02-14
Abstract
Abstract A process for increasing the specific output of a combined cycle power plant and providing flexibility in the power plant rating, both without a commensurate increase in the plant heat rate, is disclosed. The present invention demonstrates that the process of upgrading thermal efficiencies of combined cycles can often be accomplished through the strategic use of additional fuel and/or heat input. In particular, gas turbines that exhaust into HRSGs, can be supplemental fired to obtain much higher steam turbine outputs and greater overall plant ratings, but without a penalty on efficiency. This method by and large defines a high efficiency combined cycle power plant that is predominantly a Rankine (bottoming) cycle. Exemplary embodiments of the present invention include a load driven by a topping cycle engine, powered by a topping cycle fluid which exhausts into a heat recovery device.
Inventors
- 👤 William S. Rollins, III
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:41
CPC Classifications
F; F01; F01K; F01K23/00; F01K23/02; F01K23/06; F01K23/10; F01K23/106; F01K23/103; F01K23/105; Y; Y02; Y02E; Y02E20/00; Y02E20/14; Y02E20/16; Y02P; Y02P80/00; Y02P80/10; Y02P80/15
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
108 words
A combined cycle power plant process comprising the steps of providing a topping cycle fluid (“TCF”) having a TCF heat capacity (“TCP”) from a topping cycle engine (“TCE”) to a heat recovery device (“HRD”) having an exhaust section, recovering at least a portion of exhaust heat from the TCE in the HRD, providing a bottoming cycle fluid (“BCF”) having a BCF heat capacity (“BCP”) from the HRD to a bottoming cycle engine (“BCE”), and substantially continuously firing the HRD such that the ratio of the flow of TCF to BCF by mass through the HRD exhaust section is maintained substantially equal to the ratio of BCP to TCP.
Claim 2
Dependent Claim
108 words
A combined cycle power plant process comprising the steps of providing a topping cycle fluid (“TCF”) having a TCF heat capacity (“TCP”) from a topping cycle engine (“TCE”) to a heat recovery device (“HRD”) having an exhaust section, recovering at least a portion of exhaust heat from the TCE in the HRD, providing a bottoming cycle fluid (“BCF”) having a BCF heat capacity (“BCP”) from the HRD to a bottoming cycle engine (“BCE”), and substantially continuously firing the HRD such that the ratio of the flow of TCF to BCF by mass through the HRD exhaust section is maintained substantially equal to the ratio of BCP to TCP.
Claim 3
Dependent Claim
21 words
The process of claim 1 further comprising the step of controlling the HRD to maintain a substantially optimum HRD exhaust temperature.
Claim 4
Dependent Claim
17 words
The process of claim 2 , wherein the substantially optimum HRD exhaust temperature is about 180° F.
Claim 5
Dependent Claim
26 words
The process of claim 1 further comprising driving a topping cycle load (“TCL”) with said TCE, and driving a bottoming cycle load (“BCL”) with said BCE.
Claim 6
Dependent Claim
15 words
The process of claim 1 , wherein said TCE is at least one gas turbine.
Claim 7
Dependent Claim
17 words
The process of claim 1 , wherein said HRD is at least one heat recovery steam generator.
Claim 8
Dependent Claim
15 words
The process of claim 1 , wherein said BCE is at least one steam turbine.
Claim 9
Dependent Claim
102 words
A combined cycle power plant process comprising the steps of providing a topping cycle fluid (“TCF”) having a TCF heat capacity (“TCP”) from a topping cycle engine (“TCE”), recovering exhaust heat from the TCE in a heat recovery device (“HRD”) having an exhaust section, supplemental firing the HRD, providing a bottoming cycle fluid (“BCF”) having a BCF heat capacity (“BCP”) to a bottoming cycle engine (“BCE”), and controlling the firing of the HRD such that the ratio of the flow of TCF to BCF by mass through the HRD exhaust section is maintained substantially equal to the ratio of BCP to TCP.
Claim 10
Dependent Claim
102 words
A combined cycle power plant process comprising the steps of providing a topping cycle fluid (“TCF”) having a TCF heat capacity (“TCP”) from a topping cycle engine (“TCE”), recovering exhaust heat from the TCE in a heat recovery device (“HRD”) having an exhaust section, supplemental firing the HRD, providing a bottoming cycle fluid (“BCF”) having a BCF heat capacity (“BCP”) to a bottoming cycle engine (“BCE”), and controlling the firing of the HRD such that the ratio of the flow of TCF to BCF by mass through the HRD exhaust section is maintained substantially equal to the ratio of BCP to TCP.
Claim 11
Dependent Claim
22 words
The process of claim 8 , further comprising the step of controlling the HRD to maintain a substantially optimum HRD exhaust temperature.
Claim 12
Dependent Claim
17 words
The process of claim 9 , wherein the substantially optimum HRD exhaust temperature is about 180° F.
Claim 13
Dependent Claim
15 words
The process of claim 8 , wherein said TCE is at least one gas turbine.
Claim 14
Dependent Claim
17 words
The process of claim 8 , wherein said HRD is at least one heat recovery steam generator.
Claim 15
Dependent Claim
15 words
The process of claim 8 , wherein said BCE is at least one steam turbine.
References Cited (Backward Citations)
US3304712A
Cited
US3505811A
Cited
US3675426A
Cited
US3841270A
Cited
US3879616A
Cited
US4201924A
Cited
US3930367A
Cited
US4333310A
Cited
US4253300A
Cited
GB2117056A
Cited
US4627386A
Cited
US4578944A
Cited
US4896496A
Cited
US5790420A
Cited
US5269130A
Cited
US5369950A
Cited
US5375410A
Cited
US5442908A
Cited
US5669220A
Cited
US5428950A
Cited
US5642614A
Cited
US5628183A
Cited
US5724807A
Cited
US5647199A
Cited
US5649416A
Cited
JPH1037716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2005-12-16 | 2006-06-17 | 2006-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2009-12-16 | 2010-06-17 | 2010-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2013-12-16 | 2014-06-17 | 2014-12-17 | $7700.00 | Window Closed / Lapsed |