WO1999039084A1 - Combined cycle power generation plant - Google Patents
Combined cycle power generation plant Download PDFInfo
- Publication number
- WO1999039084A1 WO1999039084A1 PCT/JP1998/000352 JP9800352W WO9939084A1 WO 1999039084 A1 WO1999039084 A1 WO 1999039084A1 JP 9800352 W JP9800352 W JP 9800352W WO 9939084 A1 WO9939084 A1 WO 9939084A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- steam
- cooling system
- temperature
- gas turbine
- combined cycle
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
- F01K23/101—Regulating means specially adapted therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K23/00—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids
- F01K23/02—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled
- F01K23/06—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle
- F01K23/10—Plants characterised by more than one engine delivering power external to the plant, the engines being driven by different fluids the engine cycles being thermally coupled combustion heat from one cycle heating the fluid in another cycle with exhaust fluid of one cycle heating the fluid in another cycle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2260/00—Function
- F05B2260/20—Heat transfer, e.g. cooling
- F05B2260/232—Heat transfer, e.g. cooling characterised by the cooling medium
- F05B2260/233—Heat transfer, e.g. cooling characterised by the cooling medium the medium being steam
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
Definitions
- the present invention relates to a combined cycle power plant that combines a gas bin and a steam bin.
- a combined cycle power plant is a power generation system that combines a gas turbine plant and a steam turbine plant.
- the high-temperature region of thermal energy is shared by the gas turbine, and the low-temperature region is shared by the steam bin, and heat energy is shared.
- This is a power generation system that has been effectively collected and used, and has recently been particularly spotlighted.
- a cooling system must be provided for the formation of the high-temperature region in view of the heat resistance of the bottle structure. Air has been used as the cooling medium in this cooling system.
- Japanese Patent Application Laid-Open No. H05-166390 there is one disclosed in Japanese Patent Application Laid-Open No. H05-166390.
- Japanese Patent Application Laid-Open No. H05-166390 is that, apart from disclosing the concept of employing steam as a cooling medium for gas turbines, the details must be devised and solved.
- this steam cooling is still in a trial and error stage, and there is no example of the prior art that purges the drain from the steam cooling system when starting the gas turbine.
- the present invention focuses on various problems due to the presence of such a drain, and ensures that the drain is purged and that the drain is removed, in other words, the warm-up is completed when the gas bin is started.
- the task is to provide something that ensures that it has been done. Disclosure of the invention
- the present invention has been made to solve the above-described problems, and combines a gas turbine and a steam turbine to generate steam for driving a steam turbine using exhaust heat from a gas turbine.
- a means for detecting the flow rate of steam at the inlet and outlet of the steam cooling system is provided.
- a combined cycle power generation plant configured to determine when the warming of the steam cooling system has been completed, and if the deviation between the steam flow at the inlet and the steam However, the residual air and drain are not scattered between the inlet and outlet, and it is good to proceed to the step of starting the gas evening bin assuming that the warm-up is completed.
- the present invention also provides a gas turbine plant and a steam turbine plant, comprising a waste heat recovery poirer for generating steam for driving a steam bin by using waste heat from the gas turbine.
- a combined cycle power plant configured to provide a steam cooling system for cooling a high-temperature portion to be cooled with steam, and to collect superheated steam from the steam cooling system in a steam turbine, the temperature of outlet steam of the steam cooling system
- a combined cycle power plant that is provided with a means for detecting the temperature of the steam cooling system at the time of startup based on the outlet temperature.
- FIG. 1 is an explanatory diagram schematically showing cooling steam flow rate and temperature measurement at the entrance and exit of a steam cooling system according to one embodiment of the present invention.
- FIG. 2 is an explanatory diagram schematically showing a steam cooling system of a moving blade portion of a gas turbine.
- FIG. 3 is an explanatory diagram showing an enlarged part A of FIG. BEST MODE FOR CARRYING OUT THE INVENTION
- FIGS. 1 schematically shows a high-temperature cooled part of the gas turbine, for example, 1a is a combustor, 1b is a dynamic part, and lc is a stationary blade part.
- Reference numeral 2 denotes a steam supply pipe, which has an inlet-side flow meter 3a on the upstream side where steam enters the high-temperature cooled part 1 and an outlet on the downstream side where steam exits correspondingly.
- a side flow meter 3b is provided.
- 4a is an inlet-side thermometer
- 4b is an outlet-side thermometer.
- Reference numeral 5 denotes a first subtractor, which calculates the output difference between the inlet side flow meter 3a and the outlet side flow meter 3b, applies the result to the first comparator 6, and compares the result with the set value.
- reference numeral 7 denotes a second subtractor which calculates the outputs of the inlet thermometer 4a and the outlet thermometer 4b, applies the result to the second comparator 8, and compares the result with the set value.
- Reference numeral 9 denotes an auxiliary steam supply pipe communicating with an auxiliary steam source (not shown), and reference numeral 10 denotes a cooling steam supply pipe, which is connected to the steam supply pipe 2 by on-off valves 9 a and 10 a provided in respective pipes. They are now in communication. 11, 12, and 13 indicate drain valves, respectively.
- FIG. 2 schematically shows a high-temperature cooled portion 1b of the gas turbine blade, and a cooling steam outward path 2a indicated by a solid line in which cooling steam is supplied from the steam supply pipe 2 in the blade 21. It has a cooling steam return path 20a indicated by a dotted line for collecting the superheated steam to the high-temperature steam recovery pipe 20.
- FIG. 3 shows the drain D retained at the tip of the wing 21.
- the introduction of the steam purges the air remaining in the system, and also drains out of the system through the drain discharge lines 14, 15, and 16.
- the drain valves 11, 12, and 13 are configured to be appropriately closed when the warming of this system is completed.
- thermometer 4 a, 4 b the measured value of the measured value T in the exit side thermometer 4 b of the inlet temperature meter 4 a T.
- second subtractor 7 T outputted from in based on ut - T value of o ut is compared with a preset value in the second comparator 8 (tolerance), n - T.
- ut ⁇ tolerable value it is determined that the warming is completed, and the comparator 8 outputs the warming complete command B, just like the flow meter.
- the measured value T of the outlet thermometer 4b. ut is compared with the saturation temperature at the steam supply pressure.
- ut —saturation temperature ⁇ permissible value the warming completion command C is output in exactly the same way as with the flow meter and thermometer.
- the warming can be completed by each of the warming completion commands A, B, and C obtained in this manner or by satisfying the AND condition of at least two of these commands. It can be determined appropriately according to the scale of the equipment, required accuracy, etc.
- the step of surely discharging the drain at the tip part while performing the evening (at a low speed) should be included. Is preferred. In other words, if the drain remains on the movable parts, especially on the tip of the turbine, it may cause excessive centrifugal force and imbalance, etc., which may lead to a major accident. You have to be careful.
- thermocouple or the like may be buried in advance in a local portion where drain is likely to accumulate due to its structure, and measurement may be performed to judge the completion of warming.
- the air remaining in the steam cooling system is purged, and the drain generated in this process is removed, whereby the steam cooling system is warmed up.
- the fact that it was possible to proceed smoothly with the above series of operations was accurately determined from the deviation of the cooling steam flow rate at the entrance and exit of the steam cooling system, and the safety and stability of the operation were further improved. .
- the completion of the warm-up can be accurately determined from the deviation of the cooling steam temperature at the entrance and exit of the steam cooling system, and the safety and stability of the operation can be further improved. It is a thing.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20026696A JP3835859B2 (en) | 1996-07-30 | 1996-07-30 | Combined cycle power plant |
CA002285449A CA2285449C (en) | 1998-01-29 | 1998-01-29 | Combined cycle power generation plant |
US09/381,952 US6442926B2 (en) | 1996-07-30 | 1998-01-29 | Combined cycle power generation plant |
DE19882264T DE19882264B4 (en) | 1998-01-29 | 1998-01-29 | Composite power generating plant - includes cooling system which cools gas turbine plant to generate superheated steam which is utilised by steam turbine plant |
PCT/JP1998/000352 WO1999039084A1 (en) | 1996-07-30 | 1998-01-29 | Combined cycle power generation plant |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP20026696A JP3835859B2 (en) | 1996-07-30 | 1996-07-30 | Combined cycle power plant |
PCT/JP1998/000352 WO1999039084A1 (en) | 1996-07-30 | 1998-01-29 | Combined cycle power generation plant |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999039084A1 true WO1999039084A1 (en) | 1999-08-05 |
Family
ID=26439131
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1998/000352 WO1999039084A1 (en) | 1996-07-30 | 1998-01-29 | Combined cycle power generation plant |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP3835859B2 (en) |
WO (1) | WO1999039084A1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04148035A (en) * | 1990-10-11 | 1992-05-21 | Toshiba Corp | Vapor cooled gas turbine system |
JPH0693879A (en) * | 1992-09-11 | 1994-04-05 | Hitachi Ltd | Combined plant and operation thereof |
JPH06193468A (en) * | 1992-12-24 | 1994-07-12 | Hitachi Ltd | Gas turbine power plant |
JPH08319852A (en) * | 1995-05-25 | 1996-12-03 | Hitachi Ltd | Gas turbine plant and its cooling method |
-
1996
- 1996-07-30 JP JP20026696A patent/JP3835859B2/en not_active Expired - Fee Related
-
1998
- 1998-01-29 WO PCT/JP1998/000352 patent/WO1999039084A1/en active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04148035A (en) * | 1990-10-11 | 1992-05-21 | Toshiba Corp | Vapor cooled gas turbine system |
JPH0693879A (en) * | 1992-09-11 | 1994-04-05 | Hitachi Ltd | Combined plant and operation thereof |
JPH06193468A (en) * | 1992-12-24 | 1994-07-12 | Hitachi Ltd | Gas turbine power plant |
JPH08319852A (en) * | 1995-05-25 | 1996-12-03 | Hitachi Ltd | Gas turbine plant and its cooling method |
Also Published As
Publication number | Publication date |
---|---|
JPH1047016A (en) | 1998-02-17 |
JP3835859B2 (en) | 2006-10-18 |
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