JP2015059553A - Gas turbine intake air cooling device and gas turbine intake air cooling method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To completely gasify coolant while lowering a temperature of intake air under an environment with changeable weather.SOLUTION: A gas turbine intake air cooling device 21 lowers a temperature of intake air by spraying coolant into the same which is sucked into an air compressor 5, to rotate a gas turbine 7, from an intake port 2 through an intake duct 3. The gas turbine intake air cooling device 21: detects humidity of the intake air sucked from the intake port 2 by a humidity detector 45; controls heating operation of the coolant with a heat exchanger 41 on the basis of a detection result; and maintains a state where the humidity of the intake air is kept at lower than 100%. Or, the gas turbine intake air cooling device 21 may perform heating control of the coolant on the basis of a reference temperature thereof decided in a manner that can maintain the state where the humidity of the intake air is kept at lower than 100%.

Description

  The present invention relates to a gas turbine intake air cooling apparatus and a gas turbine intake air cooling method for spraying a cooling liquid onto air sucked into a compressor from an intake port via an intake duct in order to rotate the gas turbine, and cooling the air.

  For example, a gas turbine used for thermal power generation, etc. sucks air, compresses the sucked air with a compressor, supplies this to the combustor, and blows fuel into the combustor to burn the fuel, thereby generating This is an engine that rotates a turbine with high-temperature and high-pressure combustion gas.

  As the temperature rises, the density of the intake air decreases and the amount of intake air decreases. In the control of the gas turbine, the input fuel amount is adjusted so that the ratio between the air amount and the fuel amount becomes constant. Therefore, when the intake air amount decreases, the input fuel amount decreases, and as a result, the output of the gas turbine Decreases.

  In order to suppress the decrease in the output of the gas turbine due to such an increase in temperature, a technique is known in which a cooling liquid such as pure water is sprayed on the intake air and the temperature of the intake air is lowered by the latent heat of vaporization caused by vaporization ( Patent Document 1).

JP 2011-202521 A

  By the way, when spraying the coolant on the suction air, the coolant contained in the suction air is completely vaporized before the suction air reaches the filter or the like provided downstream of the position where the coolant is sprayed. There is a need. For example, if the cooling liquid cannot be completely vaporized before the intake air reaches the filter, the cooling liquid may wet the filter, and the filter may become clogged. When the filter becomes obstructive, the cross-sectional area of the air intake path to the gas turbine decreases, and the output of the gas turbine decreases. Also, the filter may need to be replaced.

  The amount of vaporization of the coolant varies depending on the weather. For this reason, it is not easy to completely evaporate the coolant while ensuring the effect of lowering the temperature of the intake air in an environment where the weather changes.

  In this regard, Patent Document 1 describes a technique for sufficiently evaporating the cooling liquid in the intake duct by reducing the spray amount of the cooling liquid based on the outside air temperature and the outside air humidity.

  However, for example, when the gas turbine is large, a large number of nozzles are provided in the vicinity of the intake port or in the intake duct. In such a case, the spray amount of the coolant from each nozzle can be set with high accuracy. It is difficult to control. Therefore, in the above-mentioned Patent Document 1, it may be actually difficult to completely evaporate the coolant while lowering the temperature of the intake air in an environment where the weather changes.

  The present invention has been made in view of, for example, the above-described problems, and an object of the present invention is to completely evaporate the coolant while lowering the temperature of the intake air in an environment where the weather or the like changes. An object of the present invention is to provide a gas turbine intake air cooling device and a gas turbine intake air cooling method.

  In order to solve the above-described problem, a first gas turbine intake air cooling device of the present invention sprays a coolant onto air sucked from an intake port into an air compressor through an intake duct in order to rotate the gas turbine. A gas turbine intake air cooling device that cools the air, a storage unit that stores the coolant, and a spray unit that is disposed in the vicinity of the intake port or in the intake duct, and sprays the coolant onto the air. The supply unit that supplies the coolant from the storage unit to the spray unit, the heating unit that heats the coolant, and the humidity in the vicinity of the intake port or in the intake duct is less than a predetermined value that is less than 100%. And a control unit that controls heating of the coolant by the heating unit.

  Further, a second gas turbine intake air cooling device according to the present invention is the above-described first gas turbine intake air cooling device according to the present invention, further comprising a humidity detection unit that detects humidity in the vicinity of the intake port or in the intake duct. The control unit heats the coolant by the heating unit based on the humidity detected by the humidity detection unit so that the humidity in the vicinity of the intake port or in the intake duct is less than a predetermined value of less than 100%. It is characterized by controlling.

  Further, a third gas turbine intake air cooling apparatus according to the present invention is the above-described first gas turbine intake air cooling apparatus according to the present invention, wherein a temperature detecting unit that detects the temperature of the coolant, and the vicinity of the intake port or the intake air A storage unit storing a reference temperature of the cooling liquid in which the humidity in the duct is equal to or less than a predetermined value of less than 100%, and the control unit is configured to store the temperature detected by the temperature detection unit in the storage unit. The heating of the coolant by the heating unit is controlled so as to be equal to or higher than the stored reference temperature.

  The fourth gas turbine intake air cooling device of the present invention is the above-described first gas turbine intake air cooling device of the present invention, wherein the heating unit includes a heat exchanger provided in the storage unit and the heat exchange. A heating source supply line for supplying steam or hot water to the chamber, and a discharge line for discharging the steam or hot water after heat exchange from the heat exchanger, and the control unit is in the middle of the discharge line A temperature-adjustable drain trap is provided that controls the discharge of the steam or hot water according to the temperature of the steam or hot water that is provided and that has finished the heat exchange.

  In order to solve the above-described problem, the gas turbine intake air cooling method of the present invention sprays a coolant onto the air sucked into the compressor from the intake port via the intake duct in order to rotate the gas turbine. A gas turbine intake air cooling method for cooling, comprising: a heating step for heating the coolant stored in a storage portion; and the coolant heated in the heating step is disposed in the vicinity of the intake port or in the intake duct. A supplying step for supplying to the spraying portion, and a spraying step for spraying the coolant supplied in the supplying step onto the air from the spraying portion. In the heating step, in the vicinity of the intake port or in the intake duct The cooling liquid is heated so that the humidity is not more than a predetermined value of less than 100%.

  According to the present invention, it is possible to completely evaporate the coolant while lowering the temperature of the intake air in an environment where the weather changes.

It is explanatory drawing which shows the combined cycle power plant provided with the gas turbine inlet-air cooling device by the 1st Embodiment of this invention. It is explanatory drawing which shows the gas turbine intake-air-cooling apparatus by the 1st Embodiment of this invention. It is explanatory drawing which shows the building in which the nozzle part of the gas turbine inlet-air cooling device by the 1st Embodiment of this invention, the inlet port, etc. were provided. It is explanatory drawing which shows the gas turbine intake-air-cooling apparatus by the 2nd Embodiment of this invention. It is explanatory drawing which shows the gas turbine intake-air-cooling apparatus by the 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 shows a combined cycle power plant provided with a gas turbine intake air cooling device according to a first embodiment of the present invention. In the combined cycle power plant 1 shown in FIG. 1, the air is sucked from the intake port 2, passes through the intake duct 3, and is supplied to the air compressor 5. For example, three filters 4 are provided in the intake duct 3. The atmosphere sucked from the intake port 2, that is, the sucked air passes through these filters 4 while being supplied to the air compressor 5. Thereby, impurities such as dust contained in the suction air are removed.

  When intake air compressed by the air compressor 5 and fuel such as liquefied natural gas are supplied to the combustor 6, the fuel is combusted, and high-temperature and high-pressure combustion gas is generated. The gas turbine 7 is rotated by the combustion gas.

  In the exhaust heat recovery boiler 8, steam is generated when the water supplied from the condenser 10 is heated by the heat discharged from the gas turbine 7, and the steam turbine 9 is rotated by the steam. Rotational power of the gas turbine 7 and the steam turbine 9 is given to the generator 11, and electric energy is generated by the generator 11.

  Further, the combined cycle power plant 1 is provided with a gas turbine intake air cooling device 21 according to the first embodiment of the present invention. The gas turbine intake air cooling device 21 is a device that cools the intake air by spraying a coolant onto the intake air.

  FIG. 2 shows the gas turbine intake air cooling device 21. As shown in FIG. 2, the gas turbine intake air cooling device 21 includes a storage tank 22 as a storage part, for example, two pumps 25 as supply parts, a nozzle part 31 as a spray part, and heat exchange as a heating part. And a controller 46 and a heating source control valve 44 as a control unit, and a humidity detector 45 as a humidity detection unit.

  The storage tank 22 is a tank that stores the coolant. The coolant is pure water, for example. A mixed liquid of alcohol such as methanol and pure water may be used as the cooling liquid. The storage tank 22 normally stores a coolant at all times. Further, the storage tank 22 is provided with, for example, a float type liquid level detector 23, and the amount of the cooling liquid in the storage tank 22 is detected by the liquid level detector 23. When the amount of the coolant in the storage tank 22 falls below a predetermined lower limit reference amount by the liquid level detector 23, the makeup water control valve 24 is controlled to open, and the coolant is replenished to the storage tank 22 from the outside. Further, when the amount of the coolant in the storage tank 22 reaches a predetermined upper limit reference amount, the makeup water control valve 24 is closed and the coolant supply to the storage tank 22 is stopped.

  Each pump 25 is a device that supplies the coolant stored in the storage tank 22 to the nozzle unit 31. When each pump 25 is driven, the coolant stored in the storage tank 22 is sucked up by each pump 25 through the pump pipe 26 and supplied to the nozzle unit 31 through the supply pipe 27. An adjustment valve 28 is provided in the middle of the pump pipe 26 and the supply pipe 27. A relief pipe 29 is connected to the supply pipe 27, and a relief valve 30 is provided in the middle of the relief pipe 29.

  The nozzle unit 31 is a device that sprays the cooling liquid onto the intake air. The nozzle unit 31 includes a nozzle tube 32 and a plurality of nozzle holes 33 provided in the nozzle tube 32. The coolant supplied via the supply pipe 27 flows into the nozzle pipe 32 and is sprayed (sprayed) from the nozzle holes 33 toward the intake port 2.

  Here, FIG. 3 shows a building 34 provided with the air inlet 2, the nozzle portion 31, and the like. Since the combined cycle power plant 1 employs a large gas turbine 7, the number of intake ports 2 is large, and the size of each intake port 2 is large. A plurality of nozzle portions 31 are provided, and are arranged in front of the air inlet 2 and in the vicinity of the air inlet 2. Each nozzle portion 31 is supported on the building 34 by a support portion 35, and a predetermined distance is secured between the nozzle portion 31 and the intake port 2 by the support portion 35. A part of the supply pipe 27 extends inside or on the outer surface of the building 34 and is connected to each nozzle portion 31.

  In FIG. 2, the heat exchanger 41 is a device that heats the coolant stored in the storage tank 22, and is provided in the storage tank 22. As the heat exchanger 41, a known heat exchanger such as a spiral heat exchanger can be used. Steam is supplied to the heat exchanger 41 as a heating source. Steam can be supplied from the exhaust heat recovery boiler 8. A heat source supply pipe 42 for supplying steam is connected to the inflow side of the heat exchanger 41, and a discharge pipe 43 for discharging the steam after heat exchange is connected to the discharge side of the heat exchanger 41. . A heating source control valve 44 is provided in the middle of the heating source supply pipe 42.

  The humidity detector 45 is a device that detects the humidity of the intake air in the vicinity of the intake port 2. The humidity detector 45 is provided in the vicinity of the intake port 2. As the humidity detector 45, a known humidity sensor can be used. For example, the humidity detector 45 outputs a detection signal indicating the detected humidity to the controller 46.

  The controller 46 is a device that controls the opening and closing of the heating source control valve 44 based on the humidity of the intake air detected by the humidity detector 45, and is configured by a microcomputer, for example. A detection signal output from the humidity detector 45 is input to the input terminal of the controller 46, and the heating source control valve 44 is opened and closed from the output terminal of the controller 46 toward the heating source control valve 44. A control signal to be controlled is output. The controller 46 controls the heating of the coolant so as to maintain a state where the humidity of the intake air is less than 100%. Specifically, the controller 46 closes the heating source control valve 44 while the humidity of the intake air is lower than a predetermined value, for example, 99% or less, and the humidity of the intake air exceeds 99%. Then, the heating source control valve 44 is opened. The controller 46 is provided inside a control panel (not shown) provided in the vicinity of the storage tank 22, for example.

  Although not shown, the gas turbine intake air cooling device 21 includes a thermometer that measures the air temperature in the vicinity of the intake port 2 and each pump 25 when the air temperature measured by the thermometer exceeds a predetermined required cooling temperature. And a control device for stopping the spraying of the cooling liquid by stopping each pump 25 when the air temperature falls below the required cooling temperature.

  The operation of the gas turbine intake air cooling device 21 having such a configuration is, for example, as follows.

  That is, at a certain point during the operation of the combined cycle power plant 1, since a sufficient amount of coolant is stored in the storage tank 22, the makeup water control valve 24 is closed, and the temperature near the intake port 2 is required. It is assumed that the pumps 25 are stopped because the temperature is lower than the cooling temperature, the heating source control valve 44 is closed, and steam is not supplied to the heat exchanger 41.

  Thereafter, when the weather changes, the air temperature rises, and the air temperature in the vicinity of the inlet 2 becomes equal to or higher than the required cooling temperature, each pump 25 starts to be driven. As a result, the coolant stored in the storage tank 22 is supplied to the nozzle portion 31, and the coolant is sprayed from the nozzle holes 33 toward the intake port 2. By such spraying of the cooling liquid, the temperature of the intake air is lowered.

  By continuing the spray of the coolant, when the amount of the coolant in the storage tank 22 falls below the lower limit reference amount, the makeup water control valve 24 is opened and the coolant is replenished to the storage tank 22 from the outside. When the amount of the cooling liquid in the storage tank 22 reaches the upper limit reference amount due to the replenishment of the cooling liquid, the replenishing water control valve 24 is closed and the replenishment of the cooling liquid to the storage tank 22 is stopped.

  During spraying of the cooling liquid, the heating source control valve 44 is kept closed while the humidity of the atmosphere is low and the humidity of the intake air in the vicinity of the intake port 2 is maintained at 99% or less. The coolant stored in 22 is not heated. Even in such a state, since the atmospheric humidity is low, the coolant sprayed from the nozzle portion 31 is completely vaporized before reaching the filter 4.

  When the humidity of the atmosphere increases due to changes in the weather or the like, the coolant sprayed from the nozzle portion 31 becomes difficult to vaporize. Then, when the humidity of the atmosphere continues to rise and the humidity of the intake air in the vicinity of the intake port 2 exceeds 99%, there is a possibility that the coolant sprayed from the nozzle portion 31 does not completely evaporate before reaching the filter 4. Comes out. When the humidity of the intake air in the vicinity of the intake port 2 exceeds 99%, the humidity detector 45 detects this and outputs a detection signal indicating this to the controller 46. In response to this, the controller 46 outputs a control signal for opening the heat source control valve 44 to the heat source control valve 44 and opens the heat source control valve 44. Thereby, steam is supplied to the heat exchanger 41, the coolant stored in the storage tank 22 is heated, and the temperature of the coolant rises.

  When the temperature of the coolant in the storage tank 22 increases, the temperature of the coolant sprayed from the nozzle portion 31 to the intake port 2 also increases. When the temperature of the coolant sprayed from the nozzle unit 31 is increased, vaporization of the coolant is promoted and the coolant is easily vaporized. As a result, the coolant sprayed from the nozzle portion 31 is completely vaporized before reaching the filter 4.

  When the humidity of the intake air near the intake port 2 becomes 99% or less, the humidity detector 45 detects this and outputs a detection signal indicating this to the controller 46. In response to this, the controller 46 outputs a control signal for closing the heat source control valve 44 to the heat source control valve 44 and closes the heat source control valve 44. Thereby, supply of the steam to the heat exchanger 41 is stopped, and heating of the coolant is stopped.

  Further, when the air temperature decreases and the air temperature in the vicinity of the intake port 2 becomes lower than the required cooling temperature, each pump 25 stops driving. Thereby, spraying of the coolant is stopped.

  As described above, according to the gas turbine intake air cooling device 21 according to the first embodiment of the present invention, the temperature of the intake air is lowered by spraying the coolant even in an environment where the weather changes and the atmospheric humidity changes. The coolant after spraying can be completely vaporized by heating the coolant. Therefore, it is possible to prevent the coolant sprayed into the sucked air from reaching the filter 4 without being vaporized, and it is possible to prevent the filter 4 from getting wet and the filter 4 from becoming obstructive.

(Second Embodiment)
FIG. 4 shows a gas turbine intake air cooling device according to a second embodiment of the present invention. In FIG. 4, the same components as those of the gas turbine intake air cooling device 21 according to the first embodiment of the present invention are denoted by the same reference numerals, and description thereof is omitted. As shown in FIG. 4, the gas turbine intake air cooling device 51 according to the second embodiment of the present invention is characterized by a temperature detector that detects the temperature of the coolant instead of the humidity detector that detects the humidity of the intake air. The temperature detector 52 is provided to control heating of the coolant based on the temperature of the coolant.

  That is, the gas turbine intake air cooling device 51 includes a temperature detector 52 that detects the temperature of the coolant. The temperature detector 52 is provided in the storage tank 22 and detects the temperature of the coolant stored in the storage tank 22. Further, the storage unit 54 provided in the controller 53 has a value indicating the reference temperature of the coolant that can maintain a state where the humidity near the intake port 2 is less than 100%, specifically, the intake port. A value indicating the reference temperature of the coolant at which the humidity in the vicinity of 2 is less than a predetermined value (for example, 99%) less than 100% is stored. The method for determining the reference temperature of the coolant is that the temperature of the coolant in the vicinity of the inlet 2 is 99% or less under any weather, and the gas turbine intake air cooling device is actually run for a certain period of time. The method of determining by doing this may be sufficient, and the method of determining the temperature of such a coolant by simulation may be used.

  The controller 53 controls the heating of the cooling liquid so that the temperature of the cooling liquid detected by the temperature detector 52 becomes equal to or higher than the reference temperature of the cooling liquid stored in the storage unit 54. The control method for heating the coolant by the controller 53 is the same as the control method employed in the first embodiment. That is, the heating of the coolant is controlled by opening and closing the heating source control valve 44 and switching between supply and stop of the steam to the heat exchanger 41.

  Also in the gas turbine intake air cooling device 51 having such a configuration, in an environment where the weather or the like changes, the temperature of the intake air is lowered by spraying the coolant, and the coolant after spraying is completely removed by heating the coolant. It can be vaporized.

  In the gas turbine intake air cooling device 51, a plurality of reference temperatures corresponding to a plurality of types of weather are stored in the storage unit 54, weather information is input to the controller 53, and the controller 53 corresponds to the input weather information. The reference temperature to be selected may be selected, and the heating of the coolant may be controlled using the selected reference temperature.

(Third embodiment)
FIG. 5 shows a gas turbine intake air cooling device according to a third embodiment of the present invention. In FIG. 5, the same components as those in the gas turbine intake air cooling device 21 according to the first embodiment of the present invention are denoted by the same reference numerals, and the description thereof is omitted. As shown in FIG. 5, the gas turbine intake air cooling device 61 according to the third embodiment of the present invention is characterized in that steam is discharged from the heat exchanger 41 in accordance with the temperature of the coolant by a temperature control type drain trap 62. Thus, the heating control of the coolant is realized.

  That is, the gas turbine intake air cooling device 61 is the same as the gas turbine intake air cooling device 51 according to the second embodiment in that the heating of the coolant is controlled based on the temperature of the coolant, but the gas turbine intake air cooling device Unlike 51, it does not have a dedicated temperature detector or controller. Instead, the gas turbine intake air cooling device 61 is provided with a temperature control type drain trap 62 in the middle of the discharge pipe 43 connected to the heat exchanger 41.

  The temperature control type drain trap 62 is a known device having a bimetal as a temperature sensing element and having a function of discharging drain when the temperature falls below a predetermined set temperature. The set temperature can be determined by the pushing amount of the bimetal.

  In the present embodiment, when the humidity in the vicinity of the air inlet 2 becomes equal to or lower than the reference temperature of the coolant that is equal to or lower than a predetermined value (for example, 99%) of less than 100%, Is discharged from the heat exchanger 41 through the temperature control type drain trap 62. As the set temperature of the temperature control type drain trap 62, a reference temperature of the coolant is set so that the humidity in the vicinity of the intake port 2 is less than a predetermined value of less than 100%. The reference temperature is determined by the same method as that adopted in the second embodiment.

  Also in the gas turbine intake air cooling device 61 having such a configuration, in an environment where the weather or the like changes, the temperature of the intake air is lowered by spraying the coolant, and the coolant after spraying is completely removed by heating the coolant. It can be vaporized. However, since the gas turbine intake air cooling device 61 controls the heating of the cooling liquid by the temperature control type drain trap 62, the accuracy of the heating control of the cooling liquid in the gas turbine intake air cooling device 61 is the same as that of the gas turbine according to the first embodiment. This is lower than the accuracy of cooling liquid heating control in the intake air cooling device 21 or the gas turbine intake air cooling device 51 according to the second embodiment. However, according to the gas turbine intake air cooling device 61, since the heating control of the coolant is performed by the temperature control type drain trap 62, the heating control of the coolant can be easily realized. Even when it is difficult to add a control valve or a controller to the apparatus, heating control of the coolant can be realized.

  In each of the above embodiments, the case where the coolant is heated by supplying steam to the heat exchanger 41 is described as an example, but the present invention is not limited to this. The coolant may be heated by supplying hot water to the heat exchanger 41. In this case, high-temperature hot water can be supplied from the exhaust heat recovery boiler 8. Moreover, you may supply the heat exchanger 41 with the hot water produced | generated by the water heater using solar energy. It is also possible to heat the coolant by directly mixing steam or high-temperature hot water with the coolant stored in the storage tank 22. Further, the coolant may be heated using electric energy, for example, the coolant may be heated by an electric heater. Further, the coolant may be heated by combining or switching these various heating means.

  Moreover, in each said embodiment, although the case where the nozzle part 31 was arrange | positioned in the vicinity of the inlet port 2 out of the intake duct 3 was mentioned as an example, this invention is not limited to this. The nozzle portion may be disposed in the intake duct 3. In the first embodiment, the humidity detector 45 may be disposed in the intake duct 3.

  The present invention can also be applied to a multi-shaft power plant including a plurality of gas turbines. In addition, the present invention is not limited to a combined cycle power plant, and may be applied to a power plant that generates power using only a gas turbine, or a power plant that combines a gas turbine and other rotational kinetic energy generating means other than a steam turbine. it can.

  Further, in the first embodiment, in order to maintain the state in which the humidity of the intake air is less than 100%, the case where heating of the coolant is started when the humidity of the intake air exceeds 99% is taken as an example. However, the present invention is not limited to this. The heating of the coolant may be started when the humidity of the intake air exceeds a value lower than 99% (for example, any value of 90% or more and less than 99%). Thus, by lowering the target humidity at which the cooling liquid starts to be heated, the humidity of the intake air can always be more reliably maintained below 100%. Thereby, it can prevent more reliably that the cooling fluid sprayed by the suction air reaches | attains the filter 4 without vaporizing. In addition, when the target humidity for starting the heating of the cooling liquid is lowered, the cooling liquid cannot be heated due to, for example, a failure of the heat exchanger 41 or a device for supplying steam to the heat exchanger 41. A sufficient time can be secured from that point in time until the humidity of the intake air reaches 100%. This makes it possible to take measures to stop spraying the coolant before the humidity of the intake air reaches 100%. For example, it is possible to detect that the temperature of the coolant does not rise despite the humidity of the intake air reaching the target humidity, and add a means to automatically stop spraying the coolant based on this detection result. The spray of the coolant can be reliably stopped before the humidity of the intake air reaches 100%, and the coolant contained in the intake air can be reliably prevented from reaching the filter 4 without being vaporized. it can.

  Further, the present invention can be appropriately changed within a scope not departing from the gist or concept of the invention that can be read from the claims and the entire specification, and the gas turbine intake air cooling device and the gas turbine intake air cooling accompanying such a change can be made. The method is also included in the technical idea of the present invention.

DESCRIPTION OF SYMBOLS 1 Combined cycle power plant 2 Intake port 3 Intake duct 4 Filter 5 Air compressor 6 Combustor 7 Gas turbine 8 Waste heat recovery boiler 9 Steam turbine 10 Condenser 11 Generator 21, 51, 61 Gas turbine intake cooling device 22 Storage Tank (storage part)
23 Liquid Level Detector 24 Makeup Water Control Valve 25 Pump (Supply Unit)
26 Pump piping 27 Supply piping 28 Adjustment valve 29 Relief piping 30 Relief valve 31 Nozzle part (spraying part)
32 Nozzle pipe 33 Nozzle hole 34 Building 35 Support part 41 Heat exchanger (heating part)
42 Heating source supply piping (heating source supply pipeline)
43 Discharge piping (discharge conduit)
44 Heating source control valve (control unit)
45 Humidity detector (humidity detector)
46, 53 Controller (control unit)
52 Temperature detector (temperature detector)
54 Storage Unit 62 Temperature Controlled Drain Trap

Claims (5)

A gas turbine intake air cooling device that cools the air by spraying a coolant onto the air that is sucked into the compressor from the air inlet through the air intake duct to rotate the gas turbine,
A reservoir for storing the coolant;
A spray unit that is disposed in the vicinity of the intake port or in the intake duct, and sprays the coolant onto the air;
A supply unit for supplying the coolant from the storage unit to the spray unit;
A heating unit for heating the coolant;
A gas turbine comprising: a control unit that controls heating of the coolant by the heating unit so that a humidity in the vicinity of the intake port or in the intake duct is less than a predetermined value of less than 100%. Intake cooling system. A humidity detector for detecting the humidity in the vicinity of the intake port or in the intake duct;
The control unit heats the coolant by the heating unit based on the humidity detected by the humidity detection unit so that the humidity in the vicinity of the intake port or in the intake duct is less than a predetermined value of less than 100%. The gas turbine intake air cooling device according to claim 1, wherein the gas turbine intake air cooling device is controlled. A temperature detector for detecting the temperature of the coolant;
A storage unit storing a reference temperature of the cooling liquid in which the humidity in the vicinity of the intake port or in the intake duct is equal to or less than a predetermined value of less than 100%;
The said control part controls the heating of the said cooling fluid by the said heating part so that the temperature detected by the said temperature detection part may become more than the reference temperature memorize | stored in the said memory | storage part. The gas turbine intake air cooling device described. The heating unit is
A heat exchanger provided in the reservoir,
A heating source supply line for supplying steam or hot water to the heat exchanger;
A discharge pipe for discharging steam or hot water after heat exchange from the heat exchanger,
The controller is
2. A temperature-adjustable drain trap is provided in the middle of the discharge pipe and controls discharge of the steam or hot water according to the temperature of the steam or hot water after the heat exchange. The gas turbine intake air cooling device described in 1. A gas turbine intake air cooling method that cools air by spraying a coolant onto air that is sucked from an intake port into an air compressor through an intake duct to rotate the gas turbine,
A heating step of heating the coolant stored in the storage unit;
A supply step of supplying the coolant heated in the heating step to a spray section disposed in the vicinity of the intake port or in the intake duct;
A spraying step of spraying the coolant supplied in the supplying step onto the air from the spraying unit,
In the heating step, the cooling liquid is heated so that the humidity in the vicinity of the intake port or in the intake duct is equal to or lower than a predetermined value of less than 100%.

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