US4829763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing power
Assignee: Fluor Technologies Corp
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Filing: 1987-11-10
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Granted: 1989-05-16
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Expires: 2007-11-10
Abstract
Abstract A process is disclosed for producing mechanical energy or electric power from chemical energy contained in a fuel, utilizing a combustion turbine. The compressed air which is used for combustion of the fuel to drive the turbine is humidified prior to combustion in a multistage countercurrent saturator to replace some or all of the thermal diluent air with water vapor. Humidification is effected with the water at a temperature below its boiling point at the operating pressure. The compressed air is cooled prior to humidification by passing in heat exchange relationship with the water used for humidification. Low level heat is rejected from the compressed air during intercooling and prior to humidification. This process provides a significant improvement in thermal efficiency, compared to combined cycle, steam injected cycle, intercooled regenerative cycle, and other air humidification based processes. Additionally, the entire steam cycle of a combined cycle process is eliminated, including the steam turbine generator, steam drums, surface condenser and cooling towers.
Inventors
- 👤 Ashok D. Rao
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 04:06
CPC Classifications
F; F02; F02C; F02C7/00; F02C7/12; F02C7/14; F02C7/141; F02C7/143; F01; F01K; F01K21/00; F01K21/04; F01K21/047; F02B; F02B2275/00; F02B2275/14
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
107 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) the said compression step being performed with inter-stage cooling against circulating water thereby heating the water, and using the resulting heated water to humidify the compressed air; (c) contacting the compressed air with the resulting heated water in a multistage counter-current operation for the humidification operation to form a gaseous medium; (d) burning fuel in the presence of the gaseous medium; (e) driving a gas turbine for production of power; and (f) rejecting heat from the process via the circulating water prior to its use for inter-stage cooling.
Claim 2
Dependent Claim
107 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) the said compression step being performed with inter-stage cooling against circulating water thereby heating the water, and using the resulting heated water to humidify the compressed air; (c) contacting the compressed air with the resulting heated water in a multistage counter-current operation for the humidification operation to form a gaseous medium; (d) burning fuel in the presence of the gaseous medium; (e) driving a gas turbine for production of power; and (f) rejecting heat from the process via the circulating water prior to its use for inter-stage cooling.
Claim 3
Dependent Claim
105 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) the said compression step being performed with aftercooling against circulating water thereby heating the water, and using the resulting heated water to humidify the compressed air; (c) contacting the compressed air with the resulting heated water in a multistage counter-current operation for the humidification operation to form a gaseous medium; (d) burning fuel in the presence of the gaseous medium; (e) driving a gas turbine for production of power; and (f) rejecting heat from the process via the circulating water prior to its use for aftercooling.
Claim 4
Dependent Claim
105 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) the said compression step being performed with aftercooling against circulating water thereby heating the water, and using the resulting heated water to humidify the compressed air; (c) contacting the compressed air with the resulting heated water in a multistage counter-current operation for the humidification operation to form a gaseous medium; (d) burning fuel in the presence of the gaseous medium; (e) driving a gas turbine for production of power; and (f) rejecting heat from the process via the circulating water prior to its use for aftercooling.
Claim 5
Dependent Claim
82 words
A gas combustion process for producing power using a countercurrent humidifier to humidify compressed air that is combusted with fuel including compressing the air, cooling the compressed air with water to thereby heat the water, using the water heated by the cooling of the compressed air to humidify the compressed air, the improvement comprising: the step of rejecting heat contained in the water heated by the cooling of the compressed air which includes rejection of heat from the process prior to humidification.
Claim 6
Dependent Claim
82 words
A gas combustion process for producing power using a countercurrent humidifier to humidify compressed air that is combusted with fuel including compressing the air, cooling the compressed air with water to thereby heat the water, using the water heated by the cooling of the compressed air to humidify the compressed air, the improvement comprising: the step of rejecting heat contained in the water heated by the cooling of the compressed air which includes rejection of heat from the process prior to humidification.
Claim 7
Dependent Claim
179 words
A process for producing power in a gas turbine power system comprising the steps of: compressing air in a first air compressor; removing heat of compression from the air compressed in the first air compressor by collecting the removed heat in a circulating water system; further compressing the air in a second air compressor; removing heat of compression from the air compressed in the second air compressor by further collecting the removed heat in the circulating water system; removing heat from the process by rejecting heat from the circulating water system to precool the air; moisturizing the precooled air by feeding the precooled air and water from the circulating system into a countercurrent two phase humidifier to produce a gaseous medium; feeding the gaseous medium and fuel into a combustion chamber to produce combustion gases; feeding the combustion gases to a gas turbine to convert thermal energy to mechanical work; coupling the gas turbine to a generator for converting mechanical work to electric power; and coupling the gas turbine to the first and second air compressors for compressing air.
Claim 8
Dependent Claim
179 words
A process for producing power in a gas turbine power system comprising the steps of: compressing air in a first air compressor; removing heat of compression from the air compressed in the first air compressor by collecting the removed heat in a circulating water system; further compressing the air in a second air compressor; removing heat of compression from the air compressed in the second air compressor by further collecting the removed heat in the circulating water system; removing heat from the process by rejecting heat from the circulating water system to precool the air; moisturizing the precooled air by feeding the precooled air and water from the circulating system into a countercurrent two phase humidifier to produce a gaseous medium; feeding the gaseous medium and fuel into a combustion chamber to produce combustion gases; feeding the combustion gases to a gas turbine to convert thermal energy to mechanical work; coupling the gas turbine to a generator for converting mechanical work to electric power; and coupling the gas turbine to the first and second air compressors for compressing air.
Claim 9
Dependent Claim
99 words
A process for producing power utilizing a combustion turbine, comprising humidifying compressed air in multistage countercurrent flow prior to combustion, to provide a gaseous medium as thermal diluent for combustion in said turbine, said water being at a temperature below its boiling point at the operating pressure when in contact with said compressed air, passing said compressed air in heat exchange relationship with water prior to humidification, whereby the temperature of said water is increased and the temperature of said compressed air decreased, and rejecting heat from the power production process by precooling said compressed air prior to humidification.
Claim 10
Dependent Claim
99 words
A process for producing power utilizing a combustion turbine, comprising humidifying compressed air in multistage countercurrent flow prior to combustion, to provide a gaseous medium as thermal diluent for combustion in said turbine, said water being at a temperature below its boiling point at the operating pressure when in contact with said compressed air, passing said compressed air in heat exchange relationship with water prior to humidification, whereby the temperature of said water is increased and the temperature of said compressed air decreased, and rejecting heat from the power production process by precooling said compressed air prior to humidification.
Claim 11
Dependent Claim
99 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) aftercooling the compressed air against water, whereby the temperature of said water is increased and the temperature of said compressed air is decreased; (c) contacting said compressed air with said heated water in a multistage countercurrent operation to humidify said compressed air and provide a gaseous medium as thermal diluent for combustion in said turbine; (d) said step of contacting the compressed air with heated water being preceded by heat rejection from the process by rejecting heat from the air.
Claim 12
Dependent Claim
99 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) aftercooling the compressed air against water, whereby the temperature of said water is increased and the temperature of said compressed air is decreased; (c) contacting said compressed air with said heated water in a multistage countercurrent operation to humidify said compressed air and provide a gaseous medium as thermal diluent for combustion in said turbine; (d) said step of contacting the compressed air with heated water being preceded by heat rejection from the process by rejecting heat from the air.
Claim 13
Dependent Claim
81 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) the said compression step being performed with interstage cooling against water and using the resulting heated water to humidify the compressed air; (c) contacting the compressed air with the resulting heated water in a multistage countercurrent operation for the humidification operation to form a gaseous medium; (d) said step of interstage cooling during the compression step including rejecting heat from the process.
Claim 14
Dependent Claim
81 words
A process for producing power utilizing a combustion gas turbine, comprising: (a) compressing air to a predetermined pressure; (b) the said compression step being performed with interstage cooling against water and using the resulting heated water to humidify the compressed air; (c) contacting the compressed air with the resulting heated water in a multistage countercurrent operation for the humidification operation to form a gaseous medium; (d) said step of interstage cooling during the compression step including rejecting heat from the process.
Claim 15
Dependent Claim
30 words
The processes of claims 4, 6, 7, 1 or 2 in which the gaseous medium is preheated against the gas turbine exhaust and then mixed with the fuel for combustion.
Claim 16
Dependent Claim
25 words
The process of claims 4, 6, 7, 1 or 2 in which water heated in the gas turbine exhaust is used in the humidification operation.
Claim 17
Dependent Claim
27 words
The processes of claims 3, 4, 6, 7, 1 or 2 in which water heated by sources external to the process is used in the humidification operation.
Claim 18
Dependent Claim
24 words
The process of claims 3, 4, 5, 6, 7, 1 or 2 and in which the overall compression ratio is between 6:1 and 34:1.
Claim 19
Dependent Claim
33 words
The process of claim 3, 4, 5, 6, 7, 1 or 2 in which the water vapor content of the gaseous medium is between 0.26 and 0.5 pounds per pound of dry air.
Claim 20
Dependent Claim
20 words
The process of claims 3, 4, 1 or 2 in which the fuel is pretreated by the gas turbine exhaust.
Claim 21
Dependent Claim
31 words
The process of claims 3, 4, 5, 6, 7, 1 or 2 in which a fuel gas is humidified using water heated in the intercooler, after cooler and gas turbine exhaust.
Claim 22
Dependent Claim
107 words
A gas combustion process for producing power including the steps of compressing air and removing at least some heat of compression from the compressed air by cooling the compressed air against circulating water to thereby heat the circulating water, of using the resulting heated water to humidify the compressed air, of establishing in a combustion chamber a mixture of the humidified compressed air and fuel and burning the fuel in the mixture in the combustion chamber, the improvement comprising the step of rejecting from the process heat contained in the compressed air used in the process wherein the heat is rejected from the process prior to humidification.
Claim 23
Dependent Claim
107 words
A gas combustion process for producing power including the steps of compressing air and removing at least some heat of compression from the compressed air by cooling the compressed air against circulating water to thereby heat the circulating water, of using the resulting heated water to humidify the compressed air, of establishing in a combustion chamber a mixture of the humidified compressed air and fuel and burning the fuel in the mixture in the combustion chamber, the improvement comprising the step of rejecting from the process heat contained in the compressed air used in the process wherein the heat is rejected from the process prior to humidification.
Claim 24
Dependent Claim
196 words
A process for producing power in a gas turbine power system comprising the steps of compressing air in a first air compressor; removing heat of compression from the air compressed in the first air compressor by collecting the removed heat in a circulating water system; further compressing the air in a second air compressor; removing heat of compression from the air compressed in the second air compressor by further collecting the removed heat in the circulating water system; removing further heat from the air compressed in the second air compressor by rejecting heat from the process to precool the air; moisturizing the precooled air by feeding the precooled air and water from the circulating system containing the removed heat from the first and second air compressions into a countercurrent two phase humidifier to produce water vapor; feeding the water vapor and fuel into a combustion chamber to produce hot combustion gases; feeding the hot combustion gases to a gas turbine to convert thermal energy to mechanical work; coupling the gas turbine to a generator for converting mechanical work into electric power; and coupling the gas turbine to the first and second air compressors for compressing air.
Claim 25
Dependent Claim
196 words
A process for producing power in a gas turbine power system comprising the steps of compressing air in a first air compressor; removing heat of compression from the air compressed in the first air compressor by collecting the removed heat in a circulating water system; further compressing the air in a second air compressor; removing heat of compression from the air compressed in the second air compressor by further collecting the removed heat in the circulating water system; removing further heat from the air compressed in the second air compressor by rejecting heat from the process to precool the air; moisturizing the precooled air by feeding the precooled air and water from the circulating system containing the removed heat from the first and second air compressions into a countercurrent two phase humidifier to produce water vapor; feeding the water vapor and fuel into a combustion chamber to produce hot combustion gases; feeding the hot combustion gases to a gas turbine to convert thermal energy to mechanical work; coupling the gas turbine to a generator for converting mechanical work into electric power; and coupling the gas turbine to the first and second air compressors for compressing air.
Claim 26
Dependent Claim
194 words
A process for producing mechanical power utilizing heat contained in process fluids within the system and heat from combusting a combustible fuel in a combustion chamber to turn a gas turbine comprising: providing combustible fuel; providing process fluids consisting of compressed air and water; providing a circulating water system which contains the water; providing a humidifier capable of creating a gaseous medium including water vapor; producing the gaseous medium by feeding the compressed air to the humidifier and circulating the water through the humidifier; cooling the compressed air by rejecting from the process some heat from at least one of the process fluids prior to producing the gaseous medium; feeding the gaseous medium and the combustible fuel to the combustion chamber; combusting the fuel in the presence of the gaseous medium within the combustion chamber to provide a working fluid at a first elevated temperature; feeding the working fluid to the gas turbine; expanding the working fluid in the gas turbine to produce mechanical power and turbine exhaust; extracting heat from the turbine exhaust for use within the process thereby producing a cooled turbine exhaust; and rejecting the cooled turbine exhaust from the process.
Claim 27
Dependent Claim
194 words
A process for producing mechanical power utilizing heat contained in process fluids within the system and heat from combusting a combustible fuel in a combustion chamber to turn a gas turbine comprising: providing combustible fuel; providing process fluids consisting of compressed air and water; providing a circulating water system which contains the water; providing a humidifier capable of creating a gaseous medium including water vapor; producing the gaseous medium by feeding the compressed air to the humidifier and circulating the water through the humidifier; cooling the compressed air by rejecting from the process some heat from at least one of the process fluids prior to producing the gaseous medium; feeding the gaseous medium and the combustible fuel to the combustion chamber; combusting the fuel in the presence of the gaseous medium within the combustion chamber to provide a working fluid at a first elevated temperature; feeding the working fluid to the gas turbine; expanding the working fluid in the gas turbine to produce mechanical power and turbine exhaust; extracting heat from the turbine exhaust for use within the process thereby producing a cooled turbine exhaust; and rejecting the cooled turbine exhaust from the process.
References Cited (Backward Citations)
US2186706A
Cited
US2869324A
Cited
US3335565A
Cited
US3461667A
Cited
US3657879A
Cited
US3731485A
Cited
US4448018A
Cited
US4537023A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-15 | 1992-11-14 | 1993-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-15 | 1996-11-14 | 1997-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-15 | 2000-11-14 | 2001-05-16 | $7700.00 | Window Closed / Lapsed |