CN105019956A - Gas-steam combined cycle power generation waste heat utilization system - Google Patents

Gas-steam combined cycle power generation waste heat utilization system Download PDF

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Publication number
CN105019956A
CN105019956A CN201510413305.XA CN201510413305A CN105019956A CN 105019956 A CN105019956 A CN 105019956A CN 201510413305 A CN201510413305 A CN 201510413305A CN 105019956 A CN105019956 A CN 105019956A
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China
Prior art keywords
gas
steam
output terminal
input end
connects
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CN201510413305.XA
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Chinese (zh)
Inventor
印佳敏
杨劲
袁长春
黄长华
胡江波
史磊
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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China Energy Engineering Group Guangdong Electric Power Design Institute Co Ltd
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Priority to CN201510413305.XA priority Critical patent/CN105019956A/en
Publication of CN105019956A publication Critical patent/CN105019956A/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/10Internal combustion engine [ICE] based vehicles
    • Y02T10/12Improving ICE efficiencies

Abstract

The invention relates to a gas-steam combined cycle power generation waste heat utilization system. The gas-steam combined cycle power generation waste heat utilization system is structurally characterized in that a surface heat exchanger is arranged at the air input end of a gas turbine generator set, and a hot water heat exchanger is arranged on the tail portion of a waste heat boiler; the smoke output end of the gas turbine generator set is connected with the gas input end of the waste heat boiler, and the steam output end of the waste heat boiler is connected with the steam input end of a steam turbine generator unit; the condensate water output end of the steam turbine generator unit is connected with the water supply input end of the waste heat boiler; the high-temperature hot water output end of the hot water heat exchanger is connected with the high-temperature hot water input end of a lithium bromide absorption refrigerator, and the low-temperature hot water output end of the lithium bromide absorption refrigerator is connected with the low-temperature hot water input end of the hot water heat exchanger, so that a gas-steam combined cycle power generation waste heat utilization loop and a chilled water loop are formed. The gas-steam combined cycle power generation waste heat utilization system has the beneficial effects of lowering the gas inlet temperature of a gas turbine, increasing air density, improving the quality of inlet gas, increasing the flow of the inlet gas, and capable of increasing the output force of the gas turbine.

Description

A kind of integrated gas-steam combined cycle power plant bootstrap system
Technical field
The present invention relates to a kind of bootstrap system, especially relate to a kind of integrated gas-steam combined cycle power plant bootstrap system.Belong to steam waste heat and utilize systems technology field.
Background technique
At present, the cold energy supplying system of gas and steam turbine combined cycle thermoelectric, that the high-temperature flue gas utilizing fuel gas buring to produce does work in the gas turbine, be high-grade electric energy by a part of thermal energy, waste heat in the smoke evacuation of recycling gas turbine produces steam to drive the further issued section electric energy of steam turbine, heat supply simultaneously and refrigeration in waste heat boiler; Thus achieve the cascade utilization of the energy.
Because gas turbine is constant volume equipment, its performance is relevant with residing ambient temperature.When ambient temperature raises, air density reduces, and the air quality entering gas compressor and combustion gas turbine reduces, and makes the output drop of gas turbine; Ambient temperature raises and the compression ratio of gas compressor also can be made to reduce, and the acting amount of combustion gas turbine is reduced; The power consumption of gas compressor increases simultaneously, causes exerting oneself of gas turbine to decline further.Ambient air temperature often raises 1 DEG C, and its output power can decline 1%.Therefore, need to process the air inlet environment of gas turbine.
In prior art, in the air that a kind of method absorbs when being and utilizing water to evaporate in atmosphere, heat is to reduce air temperature, although the relative moisture of air reaches 95% after cooling, but there is following shortcoming: (1) is comparatively large to combustion engine intake resistance, can reduce exerting oneself and efficiency of gas turbine.(2) cold degree is lower, and can only be cooled at most, near wet-bulb temperature, affects larger by ambient humidity.Another kind method, after adopting pulverization type devaporizer water high fineness to be atomized, sprays in air stream, utilize water atomization rear surface to amass increase and carry out enhanced water evaporation cooling effect.Although through cooled air, its relative moisture is 97%-100%, there is following shortcoming: take the load that the water capacity easily increases the weight of gas compressor in (1) air, and its performance is affected.(2) water sprayed into easily causes gas turbine blades to corrode.(3) cooling is not comprehensive, can only be cooled at most near wet-bulb temperature, affect larger by ambient humidity.
Summary of the invention
Object of the present invention, be the problem that there is load that is lower to larger, the cold degree of combustion engine intake resistance or that easily increase the weight of gas compressor to solve prior art Air flow, easily cause gas turbine blades to corrode, a kind of integrated gas-steam combined cycle power plant bootstrap system is provided.There is the feature increased of exerting oneself reducing gas turbine inlet air temperature, the density of increase air, the quality improving air inlet and flow, make gas turbine.
Object of the present invention can realize by taking following technological scheme:
A kind of integrated gas-steam combined cycle power plant bootstrap system, comprise fuel engine power generation unit, Turbo-generator Set, exhaust heat boiler and lithium-bromide absorption-type refrigerating machine, its structural feature is: arrange surface heat exchanger at the air input of fuel engine power generation unit, is provided with hot water heat exchanger at the afterbody of exhaust heat boiler; The flue gas output terminal of described fuel engine power generation unit connects the gas input of exhaust heat boiler, and the steam output end of exhaust heat boiler connects the steam input end of Turbo-generator Set; The condensed water output terminal of Turbo-generator Set connects the feedwater input end of exhaust heat boiler; The high-temperature-hot-water output terminal of hot water heat exchanger connects the high-temperature-hot-water input end of lithium-bromide absorption-type refrigerating machine, the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine connects the low-temperature water heating input end of hot water heat exchanger, forms integrated gas-steam combined cycle power plant UTILIZATION OF VESIDUAL HEAT IN loop; The chilled water input end of the chilled water output terminal connecting surface formula heat exchanger of lithium-bromide absorption-type refrigerating machine, the backwater output terminal of surface heat exchanger connects the backwater input end of lithium-bromide absorption-type refrigerating machine, forms chilled water circuit.
Object of the present invention can also realize by taking following technological scheme:
Further, be set to water pump in the feed water joint of input end of the condensed water output terminal of Turbo-generator Set and the exhaust heat boiler of exhaust heat boiler, namely the condensed water output terminal of Turbo-generator Set connects the feedwater input end of exhaust heat boiler by feed water pump.
Further, the joint of the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine and the low-temperature water heating input end of hot water heat exchanger is provided with hot water booster pump.
Further, chilled water booster pump is set in the joint of the backwater output terminal of surface heat exchanger and the backwater input end of lithium-bromide absorption-type refrigerating machine.
Further, described fuel engine power generation unit comprises air compressor, firing chamber, gas turbine, fuel engine power generation machine, arrange surface heat exchanger at the air-in place of air compressor, the delivery outlet of described air compressor connects the air input of firing chamber, the external rock gas of firing chamber natural gas input; The output terminal of firing chamber connects the input end of gas turbine, the clutch end of gas turbine connects the power intake of fuel engine power generation machine, the high-temperature flue gas exhaust end of gas turbine is the high-temperature flue gas output terminal of fuel engine power generation unit, connects the gas input of exhaust heat boiler.
Further, described Turbo-generator Set comprises steam turbine, steam turbine generator and vapour condenser, and the vapor inlet port of steam turbine connects the steam output end of exhaust heat boiler, and the clutch end of steam turbine connects the power intake of steam turbine generator; The exhaust steam output terminal of steam turbine connects the gas input port of vapour condenser, and the condensed water delivery outlet of vapour condenser is the condensed water output terminal of Turbo-generator Set.
The present invention has following outstanding beneficial effect:
1, the present invention is by arranging surface heat exchanger at the air input of fuel engine power generation unit, hot water heat exchanger is provided with at the afterbody of exhaust heat boiler, form Air flow loop and integrated gas-steam combined cycle power plant UTILIZATION OF VESIDUAL HEAT IN loop, therefore, can solve prior art Air flow exists larger to combustion engine intake resistance, cold degree is lower or easily increase the weight of the load of gas compressor, easily cause the problem that gas turbine blades corrodes, have and reduce gas turbine inlet air temperature, increase the density of air, improve quality and the flow of air inlet, make the beneficial effect increased of exerting oneself of gas turbine.
2, the present invention utilizes the water-heating cooling that exhaust heat boiler afterbody hot water heat exchanger produces, by surface heat exchanger, combustion engine air inlet is cooled, reduce the intake resistance of combustion engine, increase combustion engine and exert oneself, thus add exerting oneself of gas-steam combined circulating generation unit.By setting up hot water heat exchanger at exhaust heat boiler afterbody, reducing temperature of exhaust fume, decreasing thermo-pollution, make full use of smoke discharging residual heat and produce hot water, improve efficiency of energy utilization.Relative to direct contact type inlet gas cooling, the feature that have that cold degree is high, water rate of taking in air is little, the load of gas compressor can not be increased the weight of.Relative to misting cooling, have without the need to spraying into water, the feature of the corrosion of gas turbine blades can not be caused because introducing impurity.
Accompanying drawing explanation
Fig. 1 is the structural representation of the specific embodiment of the invention.
1-air compressor; 2-surface heat exchanger; 3-firing chamber; 4-gas turbine; 5-fuel engine power generation machine; 6-exhaust heat boiler; 7-steam turbine; 8-steam turbine generator; 9-vapour condenser; 10-feed water pump; 11-hot water heat exchanger; 12-high-temperature-hot-water; 13-low-temperature water heating; 14-lithium-bromide absorption-type refrigerating machine; 15-hot water booster pump; 16-chilled water supplies water; 17-chilled water backwater; 18-chilled water booster pump
Embodiment
Specific embodiment 1:
With reference to Fig. 1, the present embodiment comprises fuel engine power generation unit, Turbo-generator Set, exhaust heat boiler 6 and lithium-bromide absorption-type refrigerating machine 14, surface heat exchanger 2 is set at the air input of fuel engine power generation unit, is provided with hot water heat exchanger 11 at the afterbody of exhaust heat boiler 6; The flue gas output terminal of described fuel engine power generation unit connects the gas input of exhaust heat boiler 6, and the steam output end of exhaust heat boiler 6 connects the steam input end of Turbo-generator Set; The condensed water output terminal of Turbo-generator Set connects the feedwater input end of exhaust heat boiler 6; The high-temperature-hot-water output terminal 12 of hot water heat exchanger 11 connects the high-temperature-hot-water input end of lithium-bromide absorption-type refrigerating machine 14, the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine 14 connects the low-temperature water heating input end 13 of hot water heat exchanger 11, forms integrated gas-steam combined cycle power plant UTILIZATION OF VESIDUAL HEAT IN loop; The chilled water input end of the chilled water output terminal connecting surface formula heat exchanger 2 of lithium-bromide absorption-type refrigerating machine 14, the backwater output terminal of surface heat exchanger 2 connects the backwater input end of lithium-bromide absorption-type refrigerating machine 14, forms chilled water circuit.
In the present embodiment:
Be set to water pump 10 in the feed water joint of input end of the condensed water output terminal of Turbo-generator Set and the exhaust heat boiler of exhaust heat boiler 6, namely the condensed water output terminal of Turbo-generator Set connects the feedwater input end of exhaust heat boiler 6 by feed water pump 10.
Hot water booster pump 15 is provided with in the joint of the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine 14 and the low-temperature water heating input end 13 of hot water heat exchanger 11.
In the joint of the backwater output terminal of surface heat exchanger 2 and the backwater input end of lithium-bromide absorption-type refrigerating machine 14, chilled water booster pump 18 is set.
Described fuel engine power generation unit comprises air compressor 1, firing chamber 3, gas turbine 4, fuel engine power generation machine 5, at the air-in place of air compressor 1, surface heat exchanger 2 is set, the delivery outlet of described air compressor 1 connects the air input of firing chamber 3, the external rock gas of firing chamber 3 natural gas input; The output terminal of firing chamber 3 connects the input end of gas turbine 4, the clutch end of gas turbine 4 connects the power intake of fuel engine power generation machine 5, the high-temperature flue gas exhaust end of gas turbine 4 is the high-temperature flue gas output terminal of fuel engine power generation unit, connects the gas input of exhaust heat boiler 6.
Described Turbo-generator Set comprises steam turbine 7, steam turbine generator 8 and vapour condenser 9, and the vapor inlet port of steam turbine 7 connects the steam output end of exhaust heat boiler 6, and the clutch end of steam turbine 7 connects the power intake of steam turbine generator 8; The exhaust steam output terminal of steam turbine 7 connects the gas input port of vapour condenser 9, and the condensed water delivery outlet of vapour condenser 9 is the condensed water output terminal of Turbo-generator Set.
The working principle of the present embodiment is as follows:
Air enters gas compressor 1 after surface heat exchanger 2 cools, and then in firing chamber 3, produces high-temperature flue gas with combustion of natural gas, enters gas turbine 4, drives fuel engine power generation machine 5 to generate electricity; The smoke evacuation of gas turbine 4 enters exhaust heat boiler 6, and heated feed water produces steam, enters steam turbine 7, drives steam turbine generator 8 to generate electricity.Exhaust steam after Turbo-generator Set acting, after vapour condenser 9 cools, is boosted through feed water pump 10, is again entered exhaust heat boiler 6.
Exhaust heat boiler 6 afterbody arranges hot water heat exchanger 11, from the high-temperature-hot-water 12 of hot water heat exchanger 11, enters lithium-bromide absorption-type refrigerating machine 14, as the thermal source of refrigerator; Low-temperature water heating 13 after heat utilization, boosts through hot water booster pump 15, and backwater is to heat boiler afterbody hot water heat exchanger 11.
The cryogenic freezing water 16 that lithium-bromide absorption-type refrigerating machine 14 produces is supplied to the surface heat exchanger 2 before air compressor entrance, cools combustion engine air inlet; Chilled water backwater 17 after heat exchange, boosts through chilled water booster pump 18, is back to lithium-bromide absorption-type refrigerating machine 14.
Air in surface heat exchanger 2 with from cryogenic freezing water 16 heat exchange of lithium-bromide absorption-type refrigerating machine 14, temperature reduces.
It is comparatively large to combustion engine intake resistance that one aspect of the present invention solves direct contact type inlet gas cooling, and reduce exerting oneself and efficiency of gas turbine, cold degree is lower, and cooling near wet-bulb temperature, can only affect larger problem by ambient humidity.On the other hand, also solve pulverization type devaporizer to the excessive load increasing the weight of gas compressor of water rate of taking in air, its performance is affected; The problem that the impurity spraying into water can cause gas turbine blades to corrode.
The present invention has inlet gas cooling structure, by reducing gas turbine inlet air temperature, increases the density of air, improves quality and the flow of air inlet, thus makes the increase of exerting oneself of gas turbine; On the other hand, along with the reduction of intake temperature, power input to compressor also reduces.
Specific embodiment 2:
The feature of the present embodiment 2 is: omit the hot water booster pump 15 being arranged on the joint of the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine 14 and the low-temperature water heating input end 13 of hot water heat exchanger 11.All the other are with specific embodiment 1.
Specific embodiment 3:
The feature of the present embodiment 3 is: omit the chilled water booster pump 18 being arranged on the joint of the backwater output terminal of surface heat exchanger 2 and the backwater input end of lithium-bromide absorption-type refrigerating machine 14.All the other are with specific embodiment 1.
The above; be only the present invention's preferably specific embodiment, but protection scope of the present invention is not limited thereto, is anyly familiar with this technician in the scope that the present invention discloses; be equal to according to technical solution of the present invention and inventive concept thereof and replace or change, all belonged to protection scope of the present invention.In the present invention, the content of not concrete explanation is state of the art scope.

Claims (6)

1. an integrated gas-steam combined cycle power plant bootstrap system, comprise fuel engine power generation unit, Turbo-generator Set, exhaust heat boiler (6) and lithium-bromide absorption-type refrigerating machine (14), it is characterized in that: the air input of described fuel engine power generation unit arranges surface heat exchanger (2), is provided with hot water heat exchanger (11) at the afterbody of exhaust heat boiler (6); The flue gas output terminal of described fuel engine power generation unit connects the gas input of exhaust heat boiler (6), and the steam output end of exhaust heat boiler (6) connects the steam input end of Turbo-generator Set; The condensed water output terminal of Turbo-generator Set connects the feedwater input end of exhaust heat boiler (6); The high-temperature-hot-water output terminal (12) of hot water heat exchanger (11) connects the high-temperature-hot-water input end of lithium-bromide absorption-type refrigerating machine (14), the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine (14) connects the low-temperature water heating input end (13) of hot water heat exchanger (11), forms integrated gas-steam combined cycle power plant UTILIZATION OF VESIDUAL HEAT IN loop; The chilled water input end of chilled water output terminal connecting surface formula heat exchanger (2) of lithium-bromide absorption-type refrigerating machine (14), the backwater output terminal of surface heat exchanger (2) connects the backwater input end of lithium-bromide absorption-type refrigerating machine (14), forms chilled water circuit.
2. a kind of integrated gas-steam combined cycle power plant bootstrap system as claimed in claim 1, it is characterized in that: be set to water pump (10) in the feed water joint of input end of the condensed water output terminal of Turbo-generator Set and the exhaust heat boiler of exhaust heat boiler (6), namely the condensed water output terminal of Turbo-generator Set connects the feedwater input end of exhaust heat boiler (6) by feed water pump (10).
3. a kind of integrated gas-steam combined cycle power plant bootstrap system as claimed in claim 1, is characterized in that: the joint of the low-temperature water heating output terminal of lithium-bromide absorption-type refrigerating machine (14) and the low-temperature water heating input end (13) of hot water heat exchanger (11) is provided with hot water booster pump (15).
4. a kind of integrated gas-steam combined cycle power plant bootstrap system as claimed in claim 1, is characterized in that: arrange chilled water booster pump (18) in the joint of the backwater output terminal of surface heat exchanger (2) and the backwater input end of lithium-bromide absorption-type refrigerating machine (14).
5. a kind of integrated gas-steam combined cycle power plant bootstrap system as described in Claims 1-4 any one, it is characterized in that: described fuel engine power generation unit comprises air compressor (1), firing chamber (3), gas turbine (4), fuel engine power generation machine (5), at the air-in place of air compressor (1), surface heat exchanger (2) is set, the delivery outlet of described air compressor (1) connects the air input of firing chamber (3), the external rock gas of firing chamber (3) natural gas input; The output terminal of firing chamber (3) connects the input end of gas turbine (4), the clutch end of gas turbine (4) connects the power intake of fuel engine power generation machine (5), the high-temperature flue gas exhaust end of gas turbine (4) is the high-temperature flue gas output terminal of fuel engine power generation unit, connects the gas input of exhaust heat boiler (6).
6. a kind of integrated gas-steam combined cycle power plant bootstrap system as described in Claims 1-4 any one, it is characterized in that: described Turbo-generator Set comprises steam turbine (7), steam turbine generator (8) and vapour condenser (9), the vapor inlet port of steam turbine (7) connects the steam output end of exhaust heat boiler (6), and the clutch end of steam turbine (7) connects the power intake of steam turbine generator (8); The exhaust steam output terminal of steam turbine (7) connects the gas input port of vapour condenser (9), and the condensed water delivery outlet of vapour condenser (9) is the condensed water output terminal of Turbo-generator Set.
CN201510413305.XA 2015-07-14 2015-07-14 Gas-steam combined cycle power generation waste heat utilization system Pending CN105019956A (en)

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Cited By (13)

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Publication number Priority date Publication date Assignee Title
CN105464731A (en) * 2015-12-31 2016-04-06 中国能源建设集团广东省电力设计研究院有限公司 Gas-steam combined system and operation control method thereof
CN105484815A (en) * 2015-12-31 2016-04-13 中国能源建设集团广东省电力设计研究院有限公司 Fuel gas and steam combination system and running control method thereof
CN106020160A (en) * 2016-07-22 2016-10-12 绿源霖节能科技(天津)有限公司 Factory integrated control system
CN108533468A (en) * 2018-03-20 2018-09-14 华北电力大学 A kind of solar heat complementation combined cycle integrated system of cold and hot combination
CN108708835A (en) * 2018-05-15 2018-10-26 华北电力大学 A kind of novel solar complementation association circulating power generation system of cooling burning machine inlet air
CN109057898A (en) * 2018-08-07 2018-12-21 西安热工研究院有限公司 A kind of Combined cycle gas-steam turbine afterheat utilizing system based on carbon dioxide heat-pump
CN109707511A (en) * 2019-01-15 2019-05-03 张春华 A kind of combustion engine combined cycle low-temperature flue gas waste heat utilizes system
CN110206706A (en) * 2019-04-16 2019-09-06 中国科学院工程热物理研究所 The gas driven compressor assembly of inlet gas cooling
CN110284973A (en) * 2019-07-11 2019-09-27 王树成 A kind of distributed triple-generation system
CN111980880A (en) * 2019-05-23 2020-11-24 中国石油天然气股份有限公司 Working system and cooling method of gas-driven supercharger
US20210239041A1 (en) * 2018-05-04 2021-08-05 Spada Srl Apparatus, process and thermodynamic cycle for power generation with heat recovery
CN113546438A (en) * 2021-07-28 2021-10-26 华南理工大学 Heat integration system and method for gas-steam combined cycle, methanol synthesis and five-tower rectification
CN114412600A (en) * 2022-01-18 2022-04-29 华能河南中原燃气发电有限公司 Thermodynamic system for improving gas-steam combined cycle performance and working method thereof

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CN105484815A (en) * 2015-12-31 2016-04-13 中国能源建设集团广东省电力设计研究院有限公司 Fuel gas and steam combination system and running control method thereof
CN105464731A (en) * 2015-12-31 2016-04-06 中国能源建设集团广东省电力设计研究院有限公司 Gas-steam combined system and operation control method thereof
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CN109057898A (en) * 2018-08-07 2018-12-21 西安热工研究院有限公司 A kind of Combined cycle gas-steam turbine afterheat utilizing system based on carbon dioxide heat-pump
CN109707511A (en) * 2019-01-15 2019-05-03 张春华 A kind of combustion engine combined cycle low-temperature flue gas waste heat utilizes system
CN110206706A (en) * 2019-04-16 2019-09-06 中国科学院工程热物理研究所 The gas driven compressor assembly of inlet gas cooling
CN110206706B (en) * 2019-04-16 2021-06-08 中国科学院工程热物理研究所 Gas drive compressor system with intake air cooling
CN111980880A (en) * 2019-05-23 2020-11-24 中国石油天然气股份有限公司 Working system and cooling method of gas-driven supercharger
CN110284973A (en) * 2019-07-11 2019-09-27 王树成 A kind of distributed triple-generation system
CN113546438A (en) * 2021-07-28 2021-10-26 华南理工大学 Heat integration system and method for gas-steam combined cycle, methanol synthesis and five-tower rectification
CN114412600A (en) * 2022-01-18 2022-04-29 华能河南中原燃气发电有限公司 Thermodynamic system for improving gas-steam combined cycle performance and working method thereof
CN114412600B (en) * 2022-01-18 2023-08-15 华能河南中原燃气发电有限公司 Thermodynamic system for improving fuel gas-steam combined cycle performance and working method thereof

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Application publication date: 20151104