WO2017025774A1 - Gas turbine compressor load reduction and turbine mass flow maximizing device - Google Patents
Gas turbine compressor load reduction and turbine mass flow maximizing device Download PDFInfo
- Publication number
- WO2017025774A1 WO2017025774A1 PCT/IB2015/056096 IB2015056096W WO2017025774A1 WO 2017025774 A1 WO2017025774 A1 WO 2017025774A1 IB 2015056096 W IB2015056096 W IB 2015056096W WO 2017025774 A1 WO2017025774 A1 WO 2017025774A1
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- WO
- WIPO (PCT)
- Prior art keywords
- compressor
- gas turbine
- pressure
- mass flow
- turbine
- Prior art date
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C7/00—Features, components parts, details or accessories, not provided for in, or of interest apart form groups F02C1/00 - F02C6/00; Air intakes for jet-propulsion plants
- F02C7/12—Cooling of plants
- F02C7/14—Cooling of plants of fluids in the plant, e.g. lubricant or fuel
- F02C7/141—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid
- F02C7/143—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages
- F02C7/1435—Cooling of plants of fluids in the plant, e.g. lubricant or fuel of working fluid before or between the compressor stages by water injection
Definitions
- This invention device is applicable to industrial gas turbines, and looking into reducing load consumed by gas turbine COMPRESSOR and maximizing turbine MASS FLOW, and not limited to turbines fueled by natural gas, but extends to turbines fired by all other fuels.
- the main problem avoiding gas turbine overall efficiency improvement is that, air compressor alone consumes most of the power generated by the turbine. Moreover gas turbine air mass flow cannot be maximized without increasing compressor load consumption.
- Gas turbine compressor load reduction and turbine mass flow maximizing device (Fig 1) consists of, water tank (11) which is fed from a supply source, the tank feeds a high-pressure pump (12) to overcome compressor (1) air outlet pressure. High-pressure water passes through water heater (13) to raise its temperature to the desired degree, relieve valve (18) branches from the high- pressure pump outlet to maintain the required water pressure.
- a computing unit (16) receives compressor (1) outlet pressure and temperature as input signals ( 17) and their feedback signal, and sends its output signal (15) to control valve (14) to control injected water rate into compressor (1).
- the main isolation valve (19) at device outlet is to be kept close during gas turbine startup until desired condition achieved and during shutdown.
- Gas turbines are used to generate electricity.
- the gas turbine drives electrical generator to generate electricity, and also drives it compressor which compresses atmospheric air into gas turbine combustion chamber.
- air compressor alone consumes most of the power being generated by the turbine.
- One important reason for compresses high consumption is that the atmospheric air is being compressed to superheated condition.
- gas turbine air mass flow is restricted to design features and cannot be maximized without increasing compressor load consumption.
- FIG. 1 shows high-pressure water injection device arrangement consisting, water supply reservoir (11), high-pressure pump (12), water heater (13), control valve (14), computing unit (16) and minimum flow relieve valve (18) branches from the high-pressure pump outlet to maintain the required water pressure.
- the computing unit (16) receives compressor outlet pressure and temperature as input signals (17) and their feedback signal, and sends its output signal (15) to control valve (14) to control injected water rate into compressor, and main isolation valve (19).
- high-pressure water injection device (Fig. l) to be connected to the gas turbine compressor.
- High-pressure injectors to be hosted between the compressor stationary blades last stages.
- °K is in the superheated zone.
- compressor air outlet temperature can be reduced by 70 degrees from 547 °K to 477 °K without de-superheating it.
- Table below shows the improvement in the adiabatic efficiency from 32 % to 38 % in relation to drop in compressor outlet temperature from 547 °K to 477 °K.
- the mass of high-pressure injected water can be maximized by increasing its inlet temperature without de- superheating compressor out let air.
Abstract
The invention is applicable to industrial gas turbines, and looking into reducing load consumed by gas turbine COMPRESSOR, and maximizing turbine MASS FLOW. For invention implementation, High-pressure water injection system is to be introduced to the gas turbine. At compressor last stages, High-pressure injectors to be hosted between compressor stationary blades. The high-pressure injectors are to be connected to high- pressure water system. (Fig. 1) illustrates gas turbine compressor load reduction and turbine mass flow maximizing device consisting, Water supply reservoir (11), High pressure pump (12), Water heater (13), Control valve (14), Computing unit (16), Minimum flow relieve valve (18). Compressor outlet pressure and temperature input signals (17) to the computing unit (16). Computing unit output signal (15) is fed to regulate the control valve (14) to control the high-pressure water mass flow rate being injected into the last stages of compressor.
Description
DESCRIPTION
INVENTION TITLE
GAS TURBINE COMPRESSOR LOAD REDUCTION AND TURBINE MASS FLOW MAXIMIZING DEVICE
TECHNICAL FIELD
This invention device is applicable to industrial gas turbines, and looking into reducing load consumed by gas turbine COMPRESSOR and maximizing turbine MASS FLOW, and not limited to turbines fueled by natural gas, but extends to turbines fired by all other fuels.
STATEMENT OF THE PROBLEM
The main problem avoiding gas turbine overall efficiency improvement is that, air compressor alone consumes most of the power generated by the turbine. Moreover gas turbine air mass flow cannot be maximized without increasing compressor load consumption.
DEVICE DESCRIPTION
Gas turbine compressor load reduction and turbine mass flow maximizing device (Fig 1) consists of, water tank (11) which is fed from a supply source, the tank feeds a high-pressure pump (12) to overcome compressor (1) air outlet pressure. High-pressure water passes through water heater (13) to raise its temperature to the desired degree, relieve valve (18) branches from the high- pressure pump outlet to maintain the required water pressure. A computing unit (16) receives compressor (1) outlet pressure and temperature as input signals ( 17) and their feedback signal, and sends its output signal (15) to control valve (14) to control injected water rate into compressor (1). The main isolation valve (19) at device outlet is to be kept close during gas turbine startup until desired condition achieved and during shutdown.
TECHNICAL BACKGROUND
Worldwide Gas turbines are used to generate electricity. The gas turbine drives electrical generator to generate electricity, and also drives it compressor which compresses atmospheric air into gas turbine combustion chamber. The main problem is that, air compressor alone consumes most of the power being generated by the turbine. One important reason for compresses high consumption is that the atmospheric air is being compressed to superheated condition. Moreover gas turbine air mass flow is restricted to design features and cannot be maximized without increasing compressor load consumption.
INVENTION DISCLOSER
From steam table and example below it can be seen that air at compressor outlet is superheated. Superheating compressed air increases compressor load
consumption. Therefore reducing compressor air outlet temperature and pressure safely above saturation point before leaving the compressor by injecting high- pressure water at ambient temperature into compressor last stages leads to reduction in compressor load consumption, furthermore the injected water mass increases turbine mass flow, each of which leads to gas turbine overall efficiency improvement. Furthermore raising the injected high-pressure water temperature to steam saturation point at compressor outlet will maximize turbine mass flow. This leads to further gas turbine efficiency improvement.
DRAWING DESCRIPTION
(Fig. 1) shows high-pressure water injection device arrangement consisting, water supply reservoir (11), high-pressure pump (12), water heater (13), control valve (14), computing unit (16) and minimum flow relieve valve (18) branches from the high-pressure pump outlet to maintain the required water pressure. The computing unit (16) receives compressor outlet pressure and temperature as input signals (17) and their feedback signal, and sends its output signal (15) to control valve (14) to control injected water rate into compressor, and main isolation valve (19).
IMPLEMENTATION METHOD
For invention implementation, high-pressure water injection device (Fig. l) to be connected to the gas turbine compressor. High-pressure injectors to be hosted between the compressor stationary blades last stages.
DESCRIPTION OF ONE SPECIFIC EXAMPLE OF THE INVENTION
For a Gas turbine having the folio wings :-
Tl : Compressor- air inlet temperature °K = 283 °K
T2: Compressor- air outlet temperature °K = 547 °K
P2: compressor air outlet pressure = 12 bar
T3: Gas turbine inlet temperature °K = 1258 °K
T4: Gas turbine outlet temperature °K = 768°K
r|ad: adiabatic efficiency
CALCULATION
From steam table the following can be extracted:
Water vapor at 12 bar and compressor outlet temperature of (274 °C) = 547
°K is in the superheated zone.
Saturation Temperature = 192 °C = 465 °K
Degree of Superheat = 547 - 465 = 82 degree
Therefore compressor air outlet temperature can be reduced by 70 degrees from 547 °K to 477 °K without de-superheating it.
Table below shows the improvement in the adiabatic efficiency from 32 % to 38 % in relation to drop in compressor outlet temperature from 547 °K to 477 °K.
This will lead to improvement of gas turbine overall efficiency due to increase in turbine mass flow.
The mass of high-pressure injected water can be maximized by increasing its inlet temperature without de- superheating compressor out let air.
Claims
THE CLAIMS
I claim by this invention that, gas turbine compressor load reduction and turbine mass flow maximizing device (fig. 1) utilized for injecting relatively cold high-pressure water into compressor in order to reduce its air outlet temperature and pressure safely above saturation point before leaving compressor and, maximizing gas turbine mass flow by adjusting the temperature of the high-pressure water being injected into compressor last stages consisting, water reservoir (11), high-pressure pump (12), water heater (13), flow control valve (14), main isolation valve (19), minimum flow relive valve (18), computing unit (16), computing system input and feedback signals (17), and computing system output signal (15) utilized to increase gas turbine overall efficiency is my sole invention.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2015/056096 WO2017025774A1 (en) | 2015-08-11 | 2015-08-11 | Gas turbine compressor load reduction and turbine mass flow maximizing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/IB2015/056096 WO2017025774A1 (en) | 2015-08-11 | 2015-08-11 | Gas turbine compressor load reduction and turbine mass flow maximizing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2017025774A1 true WO2017025774A1 (en) | 2017-02-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/IB2015/056096 WO2017025774A1 (en) | 2015-08-11 | 2015-08-11 | Gas turbine compressor load reduction and turbine mass flow maximizing device |
Country Status (1)
| Country | Link |
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| WO (1) | WO2017025774A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220389871A1 (en) * | 2021-01-21 | 2022-12-08 | Fuad AL MAHMOOD | A process to minimizing nitrogen oxides emittion from gas turbine exhaust duct applications and maximizing gas turbine efficiency |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0933502A2 (en) * | 1998-01-30 | 1999-08-04 | Speciality Chemical Holdings Limited | Wash system for gas turbine compressors |
| EP2551486A1 (en) * | 2011-07-25 | 2013-01-30 | Alstom Technology Ltd | Method for injecting water into a multistage axial compressor of a gas turbine |
-
2015
- 2015-08-11 WO PCT/IB2015/056096 patent/WO2017025774A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0933502A2 (en) * | 1998-01-30 | 1999-08-04 | Speciality Chemical Holdings Limited | Wash system for gas turbine compressors |
| EP2551486A1 (en) * | 2011-07-25 | 2013-01-30 | Alstom Technology Ltd | Method for injecting water into a multistage axial compressor of a gas turbine |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220389871A1 (en) * | 2021-01-21 | 2022-12-08 | Fuad AL MAHMOOD | A process to minimizing nitrogen oxides emittion from gas turbine exhaust duct applications and maximizing gas turbine efficiency |
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