WO2004025102A1 - Systeme de nebulisation de turbine a gaz, et procedes correspondants de controle et de detection de defaillance - Google Patents

Systeme de nebulisation de turbine a gaz, et procedes correspondants de controle et de detection de defaillance Download PDF

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Publication number
WO2004025102A1
WO2004025102A1 PCT/IL2003/000745 IL0300745W WO2004025102A1 WO 2004025102 A1 WO2004025102 A1 WO 2004025102A1 IL 0300745 W IL0300745 W IL 0300745W WO 2004025102 A1 WO2004025102 A1 WO 2004025102A1
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WO
WIPO (PCT)
Prior art keywords
air
gas turbine
foggers
duct
wetness
Prior art date
Application number
PCT/IL2003/000745
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English (en)
Inventor
Igor Zlochin
Gal Moria
Original Assignee
Optiguide Controlled Humidity Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Optiguide Controlled Humidity Ltd. filed Critical Optiguide Controlled Humidity Ltd.
Priority to AU2003259543A priority Critical patent/AU2003259543A1/en
Publication of WO2004025102A1 publication Critical patent/WO2004025102A1/fr

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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 relates to fogging systems for gas turbine inlet air cooling, and control methods and systems therefor.
  • Gas turbines produce electricity in an amount proportional to the mass of the air compressed in a time unit by their compressor.
  • the air used is ambient, and therefor its temperature changes during the day. Air of higher temperature is of smaller mass per volume unit, and therefore air heating gives rise to a decrease in the turbine efficiency. Therefore there is a need in the art to cool the air entering the compressor of a turbine.
  • Mee Industries Inc provides a system that tries to cope with the problem of over wetting the air by foggers, by providing a meteorological unit outside the compressor, measuring the ambient air temperature and relative humidity, calculating in accordance with these measurements whether foggers' operation is required or not, and operating the foggers or stopping the operation thereof accordingly.
  • the present invention seeks to provide a novel solution to the need to control foggers' operation to optimize electricity production.
  • the present invention provides, by a first of its aspects, a method for controlling the operation of at least one fogger that adds water droplets to ambient air supplied to a compressor of a gas turbine via a duct, the method comprising measuring the wetness of the air inside the duct, and adjusting the operation of said at least one fogger in accordance with the wetness thus measured to obtain wetness within a predetermined range.
  • the adjustment may take the form of stopping the fogger(s) when said wetness level is measured to be above a first predetermined value, and re-operating said fogger(s) when said wetness is measured to be under a second predetermined value.
  • the first and second predetermined wetness values may be the same or different.
  • the adjustment may involve stopping the operation of some foggers and/or actuating the operation of others, effecting a change in the amount of water injected by some of the foggers, or changing the size of the droplets produced by at least some of the foggers, etc.
  • the wetness is preferably measured at the vicinity of the inlet of the compressor.
  • wetness of air refers to the existence of liquid water in this air. Wetness is not measured by humidity meters (also called hygrometers), that measure the concentration of water vapor (i.e. in gaseous state) in the air. Wetness is measured by wetness meters (called also wetness sensors), that are sensitive to the existence of liquid water on their surface.
  • WO 00/26652 assign to the assignee of the present application and incorporated herein by reference.
  • This is a capacitive wetness sensor, which includes a capacitor made of a first electrode, isolated from the ambient air, and an insulator.
  • a second electrode is formed by water layer when free water condenses precipitates or impinges on the exposed outer surface of the insulator.
  • the second electrode is formed, and as a result, the capacitance changes. This may happen if water droplets reach the sensor, either as a result of air saturation with water or as a result of failure in the fog system, which leads to production of too large water droplets.
  • the wetness sensor of WO 00/26652 has a wide dynamic range, which allows a distinction between 250 wetness levels.
  • an apparatus for carrying out the invented method is a gas turbine fogging system comprising an intake duct having air filters and being connected to an inlet of an air compressor of said gas turbine; at least one fogger operatively connected to a water storage tank, and being capable of fogging air inside said duct; and control means that include a wetness sensor positioned within said duct.
  • the system of the invention includes a plurality of foggers.
  • the foggers are arranged in discrete fog stages and include: a first set of foggers placed upstream of the air filters and being operable for spraying atomized water into the ambient air entering the air filters; and a second set of foggers placed downstream of the air filters and being operable for spraying atomized water into the duct air.
  • the second set of foggers is placed far enough from the compressor inlet to provide a sufficiently uniform distribution of water droplets in the duct air, in order to limit deformation of the compressor's parts if water overspray into the compressor is carried out, so that damage to said gas turbine compressor will be prevented.
  • the gas turbine fogging system also includes dew sensor(s) for sensing dew condensation in the intake duct.
  • dew sensor(s) for sensing dew condensation in the intake duct.
  • the temperature at the duct wall may differ from that of ambient air found inside the duct, it may be advisable to have one such sensor in thermal communication with the wall and another thermally insulated from the wall and in thermal communication with the air inside the duct away from the wall.
  • the dew sensor thermally communicating with the duct wall is of prime importance.
  • the walls are wormer than the air in the duct away from the walls, it is the other dew sensor that is of prime importance.
  • This embodiment may enable carrying out a method for detecting operation failures in the foggers system, by comparing the reading of the dew sensor with the readings of the wetness meter. If the wetness meter shows that the air is wet while the dew sensor does not sense dew condensing on the wall, it may be indicative to a situation where the foggers produce droplets of a too large size. More generally, it is possible to detect malfunction of the foggers by studying the correlation between the readings of the dew sensors in the duct and the wetness sensor in the vicinity of the compressor's inlet, and looking for deviations from the correlation that is typical to the system's regular operation.
  • additional wetness sensors are disposed in the vicinity of the air filters, such that a process control unit (i.e. a programmable logic controller, PLC) may be capable of controlling the spraying water flow of the first set of the foggers according to the wetness sensors' signals.
  • a process control unit i.e. a programmable logic controller, PLC
  • PLC programmable logic controller
  • additional humidity meters are disposed downstream of the air filters, and the process control unit controls spraying water flow of the first set of the foggers by the water and air pressure regulators or/and fogger stages' valves according to the humidity meters' signals.
  • the relationship between the readings of the wetness sensor positioned in the vicinity of the air filters and a humidity sensor positioned downstream of the air filters, measuring the humidity in the duct may be used to indicate malfunction of the first set of foggers online.
  • the time development and trend analysis of these readings and the relationship between them may also be used.
  • the method of the invention may be more accurate than some prior art methods, according to which, the amount of water that should be injected by the foggers is calculated in accordance with the air mass flow of the turbine and air temperature and humidity measurements outside the duct (open loop control). It is possible that the actual mass flow of the turbine is substantially different than the theoretical one, particularly if the turbine is old, such that the compressor blades are degraded. Moreover, humidity instruments aren't accurate and the humidity measurements depend on the precise location of the fog stage, on air flow, and on protecting the instruments from solar radiation. 2) The method of the invention allows provision of small water droplets
  • the system of the invention may eliminate or at least significantly reduce the necessity to apply fog droplet filters and drain structures that are utilized in some other fog systems for collection of non-evaporated fog droplets.
  • air temperature sensors are disposed downstream of the air filters and the process control unit controls the spraying water flow of the first set of the foggers by the water and air pressure regulators or/and stages' valves according to the temperature sensors and the water flow meters signals.
  • a hygrometer possibly of the dew point type, may be disposed upstream of the air filters to measure humidity of the ambient air.
  • control means also include hygrometers, preferably of the dew point type, for measuring humidity of the compressed air.
  • hygrometers preferably of the dew point type
  • optimal electricity production may be achieved if the compressed air includes optimal amount of water vapor
  • a hygrometer measuring the humidity of the compressed air may also be useful for controlling the fogging system.
  • the amount of water vapor that preferably exists in the compressed air depends on the specific turbine involved.
  • a gas turbine fogging system which comprises: an intake duct having at least one air filter and being connected to an inlet of an air compressor of said gas turbine; at least one fogger operatively connected to a water storage tank, and being capable of fogging air inside said duct; wherein said at least one fogger is connected to the gas turbine compressor to receive compressed air therefrom.
  • the system of the invention also includes a bypass branch going from the compressor to the fogger through a hygrometer, preferably of the dew point type, for humidity measurement of the compressed air.
  • the hygrometer is disposed inside the bypass branch to measure humidity of the compressed air when the system works under saturation or supersaturation (overspray) mode.
  • the process control unit may control the compressed air to contain a predetermined concentration of water vapor (usually 1-2% of the inlet air mass flow is desired) by controlling the water and air pressure regulators or/and fogger stages' valves according to the humidity found in the compressed air, as measured by the hygrometer positioned in the bypass branch.
  • water droplets evaporation efficiency may be calculated by the process control unit from the readings of the dew point hygrometer disposed in the bypass branch, and the readings of the water flow meter.
  • the development of these readings and the correlation between them over time may be used to obtain online trouble indication regarding the second set of the foggers, for example, by comparison of measured values to theoretical ones, or to values measured under proper operation of the system (reference data).
  • the use of a gas turbine compressor as compressed air supplier may reduce the maintenance requirements of the fog system. This may be so because it allows operating the system without a compressor dedicated to the fogger.
  • a gas turbine with a duct leading ambient air to a compressor, the duct having air filters and the gas turbine having fogging system for cooling air entering said compressor through said duct, wherein said fogging system has at least one atomizer positioned down stream of said air filters and outside said duct.
  • the turbine also has a water droplets sorter, for sorting water droplets by their size and allowing only droplets smaller than a predetermined size to enter to the duct.
  • the sorter includes a mass dependent separator.
  • a turbine according to this aspect of the invention provides for the following: the probability of reducing parts breaking off the atomizer and being ingested by the turbine; the possibility of sorting water droplets produced by the foggers before letting them enter into the duct, thus reducing the need for sophisticated control means for controlling the size of the droplets entering the turbine's compressor; vibration influence, caused by air flow across the manifolds of the atomizers, which might eventually lead to structural failures of the manifolds or mounting brackets, is reduced; avoiding pressure drop in the inlet air duct due to the manifolds structure; simplifying installation and maintenance without outage time, since maintenance of the fogger does not require stopping the operation of the turbine; building and designing the air duct in advance to include the foggers on its outside, with no need to adopt the air duct for hosting the atomizers manifold.
  • the present invention also provides a method for detecting troubles in the operation of any set of foggers during their startup by utilizing air and water increase profiles, that may be obtained by theprocess control unit from readings of the air pressure and water flow meters. According to the method of the invention, such profiles are compared to profiles measured when the system was operating properly. An air and water increase profiles may be plotted as the water and air flow through the foggers as a function of time.
  • Fig. 1 is a block diagram of a gas turbine fogging system in accordance with the invention
  • FIG. 2 is a more specific schematic drawing of a gas turbine fogging system in accordance with the invention.
  • Fig. 3 is a schematic drawing of another gas turbine fogging system according with the invention.
  • Fig. 1 is a block diagram showing the main components of a gas turbine fogging system according to the present invention, and the relationship between them. The block diagram does not show spatial relationship, which is better shown in Fig. 2.
  • the fogging system of Fig. 1 comprises an intake duct 1 with one or more air filters 2, a fogger assembly including one or more foggers.
  • the fogger assembly includes a first set of foggers 3 placed upstream of the air filters and a second set of foggers 4 placed downstream of the air filters.
  • the first set of foggers 3 is connected to a water tank 9 by water pipes 10 via a water pressure regulator 11 and a water flow meter 12.
  • At least one of the foggers is connected to a gas turbine compressor 5 to thereby receive compressed air therefrom.
  • the first set of foggers 3 is connected to the gas turbine compressor by air pipes 6 via an air pressure regulator 7 and an air pressure meter 8
  • the second set of foggers 4 is connected to the gas turbine compressor 5 by air pipes 13 via an air pressure regulator 14 and an air pressure meter 15.
  • the second set of the foggers 4 is connected to the water tank 9 by water pipes 16 via a water pressure regulator 17 and a water flow meter 18.
  • the system preferably also comprises a control means operable to control the water flow and air flow.
  • the control means includes a computer system comprising inter alia a memory utility (not shown), and a data processing and analyzing utility including a programmable logic controller (PLC) 19 and a control instruments set 20.
  • the control instruments set 20 comprises: humidity meters; temperature sensors; water pressure meters (not shown) and flow meters 12 and 18; air pressure meters (not shown) and air flow meters 8 and 15; water flow control means including pressure regulators 11 and 17, fog stages' water valves, fog stages' air valves for compressed air flow control; and air pressure regulators (not shown) for compressed air pressure control.
  • the humidity meters operate to measure relative humidity of the ambient air and that of the duct air and to generate a control signal in response thereto.
  • the temperature sensors operate for measuring temperature of the ambient air and the duct air and for generating a control signal in response thereto.
  • the water pressure meters and flow meters 12 and 18 operate for monitoring water flow to the fog stages and for generating a control signal in response thereto.
  • the air pressure meters and air flow meters 8 and 15 operate for monitoring compressed air pressure and flow to the fog stages and for generating a control signal in response thereto.
  • the latter preferably includes a sensor means as will be described further below with reference to Fig. 2.
  • the fogging system preferably also comprises at least one atomizer- plurality of atomizers in the present example, which are included in the first set of foggers 3 and the second set of the foggers 4 and serve for producing a uniform "dry fog" (i.e., air with water droplets having a median size of between 2 and 10 ⁇ m) by blasting water with supersonic compressed air.
  • the atomizer may be of any known suitable kind, for example that described in U.S. Patent No. 5,513,798, which is therefore incorporated herein by reference with respect to this specific example.
  • the atomizer used in this example is based on the Ventura principle, creating a strong suction (vacuum level: 6-7 m water column), and accelerating the airflow to supersonic velocities with a special profile.
  • the water is gravity fed from a storage tank.
  • the impact between the supersonic flow of air and the pumped water generates shock waves, which produce micro-droplets less than 10 microns in diameter.
  • the "dry fog” evaporates into the air without depositing free water on the turbine air filters and the duct construction.
  • the atomizer's large 1.5 mm orifice prevents clogging, common in pinhole foggers, even when water quality is poor or when spray treatments are used.
  • the atomizers are mounted on the air pipe by means of connectors, which provide flexibility in installation and adjustment.
  • Fig. 2 illustrates a specific configuration of the fogging system, embodying several aspects of the invention.
  • the figure shows some of the components shown already in Fig 1, and these are referred to with the same reference numerals used in the explanations to Fig 1 above.
  • Fig. 2 also details some of the control instruments included in the set 20 of Fig. 1.
  • the system of Fig. 2 comprises an intake duct 1 having air filters 2 and being connected to an inlet of an air compressor 5 of the gas turbine (not shown in its entirety); foggers operatively connected to a water storage tank 9, and being capable of fogging ambient air and air inside the duct 1.
  • the foggers are arranged in discrete fogger stages and include:
  • Some aspects of the present invention may apply to systems that have only one of the sets of foggers existing in the system described in Fig. 2.
  • the systems described herein in detail have the two sets of foggers for convenience only, and the invention is not to be limited to systems of this type.
  • the system also includes wetness sensors 22A positioned within the duct 1, in the vicinity of the air inlet of the compressor 5 of the gas turbine.
  • This arrangement due to the provision of the wetness sensors 22 A, allows for controlling the operation of the foggers 4 by measuring the wetness of the air inside the duct 1, and adjusting the operation of the foggers 4 in accordance with the wetness measured by the sensors 22A to obtain wetness within a predetermined range.
  • the adjustment process consists of supplying signals measured by the sensors 22 A to the control unit (PLC 19 in Fig. 1), which processes these signals and generate control signals to the air pressure regulator 14 and to the water pressure regulator 17 to adjust water and air pressure so as to increase or decrease the wetness value.
  • the PLC 19 gets feedback from the air pressure and water pressure meters 15 and 18 and from the sensors 22 A, in accordance with which it may further adjust the operation of the foggers 4 to produce wetness in a desired level.
  • the gas turbine fogging system of Fig. 2 also includes dew sensors 24 positioned inside the duct 1, one of them on a wall thereof, and the other away from the wall.
  • Dew sensor 24 may generally be of any known kind, for example that described in WO 00/26652 assigned to the assignee of the present application.
  • Such a dew sensor comprises two optic fibers having rough ends and a gap therebetween connected to a light emitter and detector.
  • the optic fibers are embedded in a plate at the ambient temperature. When environment humidity reaches or approaches the saturation point, water condenses on the rough edges of the optic fibers, filling them, and as a result, light transmission in the optic system is increased.
  • the water flow of the second set of foggers 4 can be regulated via the water pressure regulator 17 and the air pressure regulator 14 by the wetness sensors 22A and/or the dew sensor 24.
  • the water flow through the foggers of the second set 4 should be decreased if the wetness sensor indicates wetness above a predetermined level or if the dew sensor shows formation of dew, which indicates that the air in the duct 1 are at saturation, or near to it.
  • the dew sensor 24 it is possible to use the dew sensor 24 even in the absence of wetness sensor 22 A.
  • the combination of the wetness sensors 22 A and the dew sensor 24 may allow online detection of troubles.
  • time development of the correlation between signals generated by the wetness sensor 22A and signals generated by the dew sensor 24 may be used by the PLC 19 for detection of droplets of increased size that is not related to saturation of water in the air of the duct 1 but to a failure of the foggers 4, that leads them to produce droplets with too large size.
  • the water flow of the second set of foggers 4 may also be regulated via the water pressure regulator 17 and the air pressure regulator 14, by the water flow meter 18 and an inlet temperature sensor 25, disposed proximate to the inlet of the compressor 5.
  • the water flow optimization at lowest inlet air temperature is carried out by the PLC 19.
  • Comparison of this water flow with reference water flow (theoretical or that measured at proper operation of the system) according to the dew point hygrometer 26B, which is mounted upstream of the air filter 2 allows online detection of troubles in the fogging system.
  • a dew point hygrometer 26B is disposed upstream of the air filters to measure humidity of the ambient air.
  • the inlet air temperature sensor 25 used in practice is a Type K thermocouple, and is used to provide an indication of the current compressor inlet air temperature.
  • the dew point hygrometer 26B (and 26A, referred to below) may be that disclosed in the above-indicated publication WO 00/26652. It includes a condensation film placed on a thermoelectric cooler. While cooling, water vapor condenses on the film. Two optic fibers are placed in an angle in respect to the film, one connected to a light emitter and the second to a light detector that measures the light reflected from the film. Periodically, the film is mobilized, so that each period of time (for example each couple of days) a new and clean portion of the film is available for condensation and reflection measurements.
  • the gas turbine fogging system of Fig. 2 also includes wetness sensors 22B disposed in the vicinity of the air filters 2.
  • the wetness sensors 22B may be used independently of the wetness sensors 22 A, the dew sensors 24, and the hygrometer 26B. They may be used in any gas turbine fogging system in which they are mounted, for protecting air filters 2 by stopping, or at least decreasing the operation of foggers that fog air directed towards a filter, the wetness in the vicinity thereof is measured to be above a predetermined value.
  • the water flow of the first set of foggers 3 can be regulated by the wetness sensors 22B via the water pressure regulators 11 and the air pressure regulators 7.
  • additional humidity and temperature meters 23 being disposed downstream of the air filters are used.
  • the process control computer 19 controls spraying water flow of the first set of the foggers 3 by the water and air pressure regulators 11 and 7 or/and fogger stages' valves according to the humidity and temperature meters' signals.
  • the humidity and temperature meter 23 (preferably of the kind described in WO 00/26652 assigned to the assignee of the present application) includes a thermoelectric cooler with a mirror and a control device capable of measuring the relative humidity of the air by measuring the current of the thermoelectric cooler in the course of dew condensation on the mirror. Air temperature may be measured, for example, by DALLAS Digital Thermometer DS1820.
  • the system also provides for performing online trouble detection.
  • the programmable logic controller (PLC) 19 analyzes the time development of the correlation between the signal generated by the wetness sensor 22B and the humidity and temperature meter 23 to perform the online trouble detection, for example, to detect increase in the size of the water droplets in the first set of foggers 3.
  • the gas turbine fogging system of Fig. 2 also demonstrates a system where the foggers 3 and 4 are connected to the gas turbine compressor 5 to receive compressed air therefrom.
  • the foggers 3 are connected to the compressor 5 through pipe 6, valve 7 and air pressure meter 8, and the foggers 4 are connected to the compressor 5 through pipe 13, valve 14, and air pressure meter 15.
  • a bypass branch 27 goes from the compressor 5 to the second set of foggers 4, and hosts a dew point hygrometer 26 A positioned therein.
  • Positioning the dew point hygrometer 26A in the bypass branch 27 allows for controlling the operation of the gas turbine fogging system by measuring the humidity of the compressed air (with hygrometer 26 A), and adjusting the operation of the foggers 4 (by PLC 19 and its control over the valves 14 and 17) so as to produce compressed air having humidity in a predetermined range, which depends on the specific turbine applied.
  • the hygrometer 26A also allows for obtaining online trouble indication regarding the second set of foggers 4 by calculating water droplets evaporation efficiency from measured values of humidity of the compressed air in the bypass branch 27 and water flow to the foggers (measured by water flow meter 18), analyzing the trend of the correlation between the humidity in the compressed air and the water flow to the foggers, and comparing the trend found to expected trends.
  • the expected trends may be either calculated theoretically or be measured when the system operates properly and saved in the PLC 19 for comparison with online detected trends.
  • the overspray water flow of the second set of foggers 4 can be regulated via the water pressure regulator 17 and the air pressure regulator 14, by the wetness sensor 22A and the dew sensor 24, which are mounted at locations proximate to the compressor inlet and by the dew point hygrometer 26A, which is mounted in the bypass branch 27.
  • the dew sensor 24 sends to the PLC 19 a signal that an overspray begins.
  • the dew point hygrometer 26A measures the humidity in the compressed air.
  • the wetness sensors 22A which are mounted at a suitable location proximate to the compressor inlet 5 sends a trouble signal to the PLC 19, in case it detects relatively large water droplets.
  • the PLC 19 detects trouble in any of the set of foggers 3 or 4 according to air and water flow increasing profiles that are measured by the air pressure meter 8 or 15 and water flow meters 12 or 18 (respectively), and compares measured data with data stored in the memory utility of the control means as being indicative of proper operation of the fogging system.
  • Fig. 3 shows a gas turbine fogging system, wherein parts appearing in Figs 1 and 2 are referred by same reference numbers as in Figs 1 and 2.
  • the main feature distinguishing the system of Fig. 3 from those of the preceding figures is that it has atomizers 30 of the foggers that are downstream of the air filters 2 positioned outside the duct 1.
  • the arrows in the figure show the air stream. Taking the atomizers 30 to the outside of the duct 1 may have considerable advantages, as explained in the Summary section of this description.
  • a water droplets sorter 32 for sorting water droplets by their size and allowing only droplets smaller than a predetermined edge size to enter to the duct.
  • the sorter 32 is a mass dependent separator, including an angled tunnel 42, which receives some of the air going from the duct 1 to the compressor 5.
  • Tunnel 42 has an inner wall of the knee 44 being supplied with an adsorbent material 46, such as a sponge.
  • adsorbent material 46 such as a sponge.
  • air with water droplets of various sizes enters the tunnel 42 at its first end 48, collects water droplets produced by atomizers 30, and reaches the knee 44.
  • Heavy and large droplets, having diameter larger than a predetermined edge size continue by inertia and are absorbed into the absorbent material 46 of the inner wall of the knee 44, while lighter and smaller droplets continue with the air towards the second end of the tunnel 50, and from there back to the duct 1.
  • the air and water mixture going out of the end 50 are sorted to include only droplets smaller than a predetermined edge size.
  • the edge size may be adjusted by adjusting the angle, and/or by adjusting the entrance velocity of the air/water mixture into the

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  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
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  • General Engineering & Computer Science (AREA)
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Abstract

L'invention concerne un procédé de contrôle du fonctionnement de nébulisateurs qui ajoutent des gouttelettes d'eau à l'air ambiant fourni à un compresseur de turbine à gaz (5) via une conduite (1), et des systèmes de nébulisation de turbine à gaz pour la mise en oeuvre de ce procédé. On distingue au moins les étapes de procédé suivantes: (a) mesure de l'humidité de l'air dans la conduite, et réglage des nébulisateurs selon la mesure effectuée, pour assurer l'humidité dans une gamme préétablie; (b) mesure de l'humidité au voisinage des filtres à air de la turbine à gaz pour déterminer si l'humidité mesurée excède un certain seuil, et à la détection correspondante, réduction du fonctionnement des nébulisateurs dirigés vers les filtres, pour les protéger; (c) mesure de l'humidité de l'air comprimé, et réglage des nébulisateurs pour produire de l'air comprimé dans lequel on assure l'humidité selon une gamme préétablie.
PCT/IL2003/000745 2002-09-12 2003-09-11 Systeme de nebulisation de turbine a gaz, et procedes correspondants de controle et de detection de defaillance WO2004025102A1 (fr)

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AU2003259543A AU2003259543A1 (en) 2002-09-12 2003-09-11 A gas turbine fogging system and methods for its control and trouble detection

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US41000702P 2002-09-12 2002-09-12
US60/410,007 2002-09-12

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Cited By (9)

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WO2004111413A1 (fr) * 2003-06-19 2004-12-23 Edoardo Lossa S.P.A. Systeme de traitement et de mise en pression d'eau pour le refroidissement adiabatique d'air comburant
WO2005008044A1 (fr) * 2003-07-22 2005-01-27 Alstom Technology Ltd Procede pour faire fonctionner une machine motrice aerobie
WO2005045213A1 (fr) * 2003-11-07 2005-05-19 Alstom Technology Ltd Procede pour faire fonctionner un dispositif de pulverisation dans un groupe turbine a gaz
JP2008002466A (ja) * 2006-06-21 2008-01-10 General Electric Co <Ge> ガスタービン吸気口用空気バイパスシステム及び方法
EP2570631A3 (fr) * 2011-09-14 2014-04-16 General Electric Company Turbine à gaz comprenant un système de nébulisation et procédé d'opération
US8857383B2 (en) 2009-06-30 2014-10-14 Cummins Power Generation Ip, Inc. Apparatus, systems, and methods to address evaporative cooling and wet compression for engine thermal management
CN107797043A (zh) * 2017-11-10 2018-03-13 清华大学 一种湿度、气压可解耦调节的先导放电试验系统
JP2018524508A (ja) * 2015-06-24 2018-08-30 エーエーエフ・リミテッド 吸気システムの運転方法
US11808205B2 (en) 2021-02-23 2023-11-07 Stellar Energy Americas, Inc. Turbine inlet air cooling systems with condensate water recovery

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JP2018525556A (ja) * 2015-06-24 2018-09-06 エーエーエフ・リミテッド 装置の吸気温度を低下させるシステム
CN107797043A (zh) * 2017-11-10 2018-03-13 清华大学 一种湿度、气压可解耦调节的先导放电试验系统
US11808205B2 (en) 2021-02-23 2023-11-07 Stellar Energy Americas, Inc. Turbine inlet air cooling systems with condensate water recovery

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