JP5547592B2 - Intake air temperature control device for gas turbine - Google Patents

Description

  The present invention relates to a gas turbine intake air temperature control device that cools or heats intake air of a gas turbine mainly used for power generation.

  In the technology disclosed in FIG. 1, FIG. 3, FIG. 5 and FIG. 7 of Japanese Patent Application Laid-Open No. 2003-206752, which is a prior art, when the inlet air of the gas turbine compressor is cooled, the ambient temperature is high. Disclosed is a configuration in which heat exchange between a gas turbine compressor inlet air and a chiller evaporator heat exchange is performed by a heat exchanger provided in an air intake passage of the gas turbine compressor to cool the gas turbine compressor inlet air. Has been.

  In the technique disclosed in FIG. 8 and FIG. 9 of Japanese Patent Application Laid-Open No. 2003-206752, when the inlet air of the gas turbine compressor is heated, the hot compressed air at the outlet of the gas turbine compressor under an environmental condition where the atmospheric temperature is low. By a method of recirculating a part of the gas to the compressor inlet, a method of supplying gas turbine exhaust gas, or steam generated from an exhaust heat recovery boiler provided on the exhaust side of the gas turbine directly or indirectly to the heat exchanger Each implementation is disclosed.

  In the conventional technique disclosed in Japanese Patent Laid-Open No. 2003-206752, the cooling of the inlet air of the gas turbine compressor and the heating of the gas turbine compressor are performed using completely different devices and cycles.

JP 2003-206752 A

  In a combined power generation facility composed of a gas turbine, a steam turbine that uses steam generated from an exhaust heat recovery boiler that uses exhaust gas from the gas turbine as a heat source, and a generator driven by the gas turbine and the steam turbine, As for the power generation output and power generation efficiency of the combined power generation facility, the power generation output increases as the atmospheric temperature is lower. However, the power generation efficiency generally has the highest efficiency around the atmospheric temperature of 15 ° C to 20 ° C.

  This is because the output of the gas turbine increases and the amount of exhaust gas increases when the atmospheric temperature is low, but the efficiency also improves, so the exhaust gas temperature decreases. As a result, the increase tendency of the amount of exhaust heat to the exhaust heat recovery boiler is suppressed, and the increase ratio of the output of the steam turbine is smaller than that of the gas turbine.

  Cooling of the inlet air of a gas turbine compressor is used as a countermeasure for peak power consumption in summer when electric power companies that conduct large-scale power sales business using the performance characteristics of such combined power generation facilities. A private power generation company receiving supply of supplementary power from an electric power company uses it to increase the output of the gas turbine so that the amount of purchased power does not exceed the contracted power.

  However, in any case, there is a problem that the use is limited to the temporary operation in the summer, and it is not always easy to obtain a gain commensurate with the initial investment.

  Also, during the cooling operation of the inlet air of the gas turbine compressor, in order to produce the cold water used in the heat exchanger provided in the air intake passage of the gas turbine compressor with the evaporator of the refrigerator, the refrigerant is supplied to the refrigerator condenser. However, the cooling water is generally cooled by a cooling tower, and the heat dissipation loss to the atmosphere is large. Water was needed.

  On the other hand, the heating of the gas turbine compressor inlet air is performed by a method in which a part of the high-temperature compressed air at the gas turbine compressor outlet is recirculated to the compressor inlet or a method using the thermal energy of the gas turbine exhaust gas, for example, an exhaust heat recovery boiler. A method of heating using generated steam has been adopted.

  However, in the method in which a part of the high-temperature compressed air at the gas turbine compressor outlet is recirculated to the compressor inlet, the amount of recirculated air in the gas turbine compressor increases and the required drive power of the gas turbine compressor increases. On the other hand, since the amount of air sent to the combustor of the gas turbine decreases, the amount of fuel to the combustor decreases, and the ratio of the required drive power of the compressor to the gas turbine output increases, and the gas turbine power generation facility and the complex The power generation efficiency of the power generation facilities is greatly reduced.

  In the method of using the thermal energy of the gas turbine exhaust gas, since a part of the steam that can be used to drive the steam turbine is used for heating the gas turbine intake air, the combined power generation facility that combines the gas turbine and the steam turbine generates power. There was a problem that efficiency decreased.

  For this reason, the heating of the gas turbine compressor inlet air is for avoiding the gas turbine compressor from becoming a surging operation region in an extremely cold season when the atmospheric temperature is -20 ° C. or lower in a gas turbine installed in a cold district. In order to prevent moisture in the air from freezing at the inlet of the gas turbine compressor when the ambient temperature is between -5 ° C and 5 ° C in winter, However, the purpose of use was limited to equipment protection and output restrictions such as applying load restrictions to prevent the authorized output often being determined by the generator output near 5 ° C at lower atmospheric temperatures.

  The object of the present invention is to switch the supply of cold water and cooling water generated in a refrigerator and exchange heat with air sucked into the gas turbine compressor to cool or heat the air, and during the cooling operation of the intake air, An object of the present invention is to provide an intake air temperature control device for a gas turbine capable of increasing the output and improving the efficiency of a combined power plant during intake air heating operation.

An intake air temperature control device for a gas turbine according to the present invention includes a gas turbine, a steam turbine using steam generated from an exhaust heat recovery boiler that uses exhaust gas from the gas turbine as a heat source, and power generation driven by the gas turbine and the steam turbine. And a heat exchanger configured to cool or heat air sucked into a gas turbine compressor constituting a gas turbine of the combined power generation facility, and chilled water as a heat medium for cooling the heat exchanger And a cooling machine for producing cooling water, a system of cold water piping for supplying the cold water produced by the refrigerator as a heat medium for cooling the heat exchanger, and the cooling water produced by the refrigerator A cooling water piping system is provided for supplying heat as a heat medium for heating the exchanger, and the cooling water or the cooling water of the heat medium heat-exchanged by the heat exchanger is returned to the refrigerator. A system of return piping and a system of cooling water return piping are provided respectively, and the cold water piping and the cooling water piping are connected together, and either the cold water or the cooling water produced by the refrigerator is switched to either the cold water or the cooling water. Is connected to the cold water return pipe and the cooling water return pipe, and either one of the cold water or the cooling water of the heat medium exchanged with the heat exchanger is provided. An absorptive refrigeration driven by extraction steam of a steam turbine, and a control device for controlling the switching control device and the switching device in synchronism with each other . When the chilled water is supplied to the heat exchanger, the chilled water return distribution is performed by switching the chilled water after the heat exchange with the heat exchanger by the switching device according to the command signal from the control device. When the cooling water is supplied to the heat exchanger, the cooling water after the heat exchange is exchanged by the switching device by the command signal from the control device. It was configured to switch back to the condenser in the absorption chiller through the cooling water return pipe .

  According to the present invention, the supply of cold water and cooling water generated in the refrigerator is switched to exchange heat with the air sucked into the gas turbine compressor to cool or heat the air, and during the cooling operation of the intake air, It is possible to realize a gas turbine intake air temperature control device that can increase the output and improve the efficiency of the combined power plant during the intake air heating operation.

1 is a system diagram of a combined power generation facility equipped with an intake air temperature control device for a gas turbine according to an embodiment of the present invention.

  In a combined power generation facility to which an intake temperature control device for a gas turbine according to an embodiment of the present invention is applied, the gas turbine is driven by a steam turbine that uses steam generated from an exhaust heat recovery boiler that uses exhaust gas from the gas turbine as a heat source. The combined generator facility is composed of a generator to be equipped with a heat exchanger that cools the air sucked into the gas turbine compressor by cold water produced by the evaporator of the refrigerator, and the cooling water of the condenser of the refrigerator Heat exchange in which chilled water is circulated during the intake air cooling operation so that it can be used for the intake air heating operation to the gas turbine compressor for the gas turbine intake air cooling facility that radiates heat to the outside using a cooling tower or the like It is constituted so that it can be switched to supply circulation of the warm water which comes out from the condenser of a refrigerator.

  The refrigerator type may be an absorption refrigerator or a compression refrigerator. In the case of an absorption refrigerator, the driving steam source can be extracted steam of a power generation steam turbine, exhaust heat recovery boiler generated steam, and hot water. In the case of a compression refrigerator, the compressor may be driven by a steam turbine or an electric motor.

  As with the absorption type, the steam source when driven by a steam turbine can be extracted steam from a steam turbine for power generation or steam generated from an exhaust heat recovery boiler, but it can also be connected to the shaft of the steam turbine for power generation via a speed reducer. Conceivable.

  In each of the intake air cooling operation and the intake air heating operation for the gas turbine compressor, the amount of improvement in power generation efficiency can be increased by performing the following.

  First, during the intake air cooling operation to the gas turbine compressor, for example, gas turbine fuel and heat are used so that the cooling water of the refrigerator condenser that radiates heat to the atmosphere in the cooling tower becomes heat input to the combined power generation facility. Install a heat exchanger to exchange, improve the power generation efficiency by circulating cooling water between the heat exchanger and the compressor condenser with a pump, drainage and makeup water generated in the cooling tower Can be eliminated.

  Note that the cooling water circulation destination of the refrigerator condenser is not limited to the fuel system of the gas turbine, but if it is a place where heat is input to the combined power generation facility, an exhaust heat recovery boiler feed water pump installed at the condenser outlet In addition, the cooling water from the condenser of the refrigerator can be circulated in parallel or in series to multiple heat recovery points, the recovery destination can be switched according to the system startup order, and the flow rate of the cooling water can be adjusted. It can be changed.

  The method of exchanging heat with the combined power generation facility is not limited to the method using a heat exchanger, but the composition, pressure and temperature conditions of the fluid such as feed water to the exhaust heat recovery boiler can be accepted by the condenser of the refrigerator. If there is, it can be considered to flow directly as cooling water to the condenser of the refrigerator.

  Next, in the heating operation of the air sucked into the gas turbine compressor, since the cooling water of the refrigerator condenser is used for heating the air, it is produced with steam or electric power used for driving the refrigerator and an evaporator. The amount of heat that is almost equal to the amount of heat that the cold water that is obtained from the outside adds is the amount of heat that the cooling water in the condenser of the refrigerator exchanges with the air that is sucked into the gas turbine compressor.

  Therefore, the advantage of using the cooling water of the condenser of the refrigerator is that the amount of heat obtained from the outside by the cold water produced by the evaporator of the refrigerator can be used in addition to the energy consumed by the steam and electricity consumed by the refrigerator. . The amount of heat obtained from the outside by the cold water produced by the evaporator of the refrigerator is the amount of heat taken from the other side.

  Therefore, the cold water is heat-exchanged with the cooling water of the combined power generation facility and used for cooling the equipment cooling water of the combined power generation facility. For example, a heat exchanger is installed on the cooling water inlet side to the generator cooler to exchange heat, and the cold water is circulated to the evaporator of the refrigerator. Thus, the cooling water temperature to the generator cooler is kept low, the loss of the generator is reduced, and the power generation efficiency of the combined power generation facility is improved. Similar effects can be considered in other devices.

  In addition, the pump power can be reduced by reducing the amount of water in the equipment cooling water pump of the combined power generation facility, because the cooling effect is enhanced by heat exchange with the cold water supplied from the evaporator of the refrigerator. Furthermore, if this equipment cooling water pump is a pump motor capable of controlling the rotational speed such as inverter control, the effect of reducing pump power is increased.

  Other cold water heat exchange destinations include cooling water for steam turbine condensers. If the pressure inside the condenser is lowered by cooling, the output of the steam turbine is increased and the power generation efficiency of the combined power generation facility is improved. The mechanism for reducing the power of the condenser cooling water pump obtained by reducing the amount of cooling water instead of lowering the pressure inside the condenser is the same as in the case of the equipment cooling water pump. Moreover, the same method as the case of the condenser cooling water of a refrigerator is also considered about the parallel to a plurality of places, serial circulation operation, etc.

  Note that the performance data held in the control device may be previously stored as a numerical table, or the performance simulation of the combined power generation facility may be performed each time. It is also conceivable to incorporate a correction function for the atmospheric relative humidity, atmospheric pressure, power system power factor, and the like, which are performance change factors other than the atmospheric temperature.

  A gas turbine intake air temperature control apparatus according to an embodiment of the present invention will be described in detail with reference to FIG.

  FIG. 1 shows a combined power generation facility equipped with a gas turbine intake air temperature control device according to an embodiment of the present invention, and cold water produced by an evaporator of an absorption chiller 21 driven by extracted steam 22 of a steam turbine 15. The case where the gas turbine compressor intake cooling is performed by the heat exchanger 3 installed in the air intake passage 1 of the gas turbine compressor 6 is shown.

  As shown in FIG. 1, the combined power generation facility of the present embodiment includes a gas turbine power generation facility 5, an exhaust heat recovery boiler 12 that uses exhaust gas from the gas turbine power generation facility 5 as a heat source, and steam generated by the exhaust heat recovery boiler 12. This is a combined power generation facility including a steam turbine power generation facility 14 that drives the steam turbine 15.

  The gas turbine power generation facility 5 includes a gas turbine compressor 6 that compresses air, a combustor 7 that mixes and burns the air compressed by the gas turbine compressor 6 and the fuel supplied through the fuel pipe 8. A gas turbine 9 driven by high-temperature combustion gas generated in the combustor 7 and a gas turbine generator 10 that rotates by the gas turbine 9 and generates electric power are provided.

  In order to cool the intake air of the gas turbine compressor 6 of the gas turbine power generation facility 5, an absorption refrigeration machine 21 driven by the bleed steam 22 of the steam turbine 15 constituting the combined power generation facility is installed. The cold water produced by the evaporator provided in the machine 21 is supplied to the heat exchanger 3 installed in the air suction passage 1 of the gas turbine compressor 6 to perform intake air cooling of the gas turbine compressor.

  In the gas turbine intake air temperature control apparatus according to the present embodiment, cold water 25 produced by the evaporator of the absorption refrigeration machine 21 in the heat exchanger 3 installed in the air intake passage 1 as an intake air cooling apparatus of the gas turbine compressor. In addition to the chilled water pipe 26 serving as a system for supplying heat, the cooling water pipe 33 serving as a system for supplying cooling water 34 for the condenser of the absorption chiller 21 to the heat exchanger 3 and heat from the absorption chiller 21. The control device 100 that performs control to switch the fluid supplied to the exchanger 3 to one of the cold water 25 and the cooling water 34, and the supply of the cold water 25 or the cooling water 34 is switched by a command signal from the control device 100. A switching adjustment device 28 to be operated is installed. The control device 100 has a function of adjusting the supply amount of the cold water 25 or the cooling water 34 by the switching adjustment device 28.

  For this reason, both the cold water pipe 26 and the cooling water pipe 33 are connected to the switching adjustment device 28, and the switching adjustment device 28 is switched by an operation signal from the control device 100 to determine which of the cold water 25 and the cooling water 34. One of the fluids is configured to be supplied to the heat exchanger 3.

  Here, since the temperature levels of the cold water 25 and the cooling water 34 are different, the cold water 25 and the cooling water 34 after heat exchange in the heat exchanger 3 are mixed, or the respective production locations in the absorption refrigerator 21 are If the water is returned to a different location, the quantitative balance between the absorption liquid and the refrigerant liquid is lost in the absorption refrigeration machine 21 to cause an abnormality in the refrigeration cycle, or the efficiency of the refrigeration machine 21 is reduced.

  That is, when the cold water 25 is supplied to the heat exchanger 3, the cold water 25 after the heat exchange is supplied to the cold water production location in the absorption chiller 21 and when the cooling water 34 is supplied to the heat exchanger 3. It is necessary to return the cooling water 34 after the heat exchange to the cooling water production location in the absorption chiller 21. For this reason, the switching operation of the switching adjusting device 28 is performed as described above by the command signal from the control device 100. In addition, a switching device 29 is provided for switching the destination of the cold water 25 or the cooling water 34 after heat exchange from the heat exchanger 3 in conjunction with the switching adjustment device 28.

  When the cold water 25 is supplied to the heat exchanger 3, the cold water 25 after the heat exchange in the heat exchanger 3 is switched by the switching device 29 by the command signal from the control device 100, and the cold water return pipe 30 is switched. When the cooling water 34 is supplied to the heat exchanger 3, the heat exchanger 3 generates heat in response to a command signal from the control device 100. The replacement cooling water 34 is switched by the switching device 29 and returned to the condenser in the absorption refrigerator 21 through the cooling water return pipe 35.

  Further, in the gas turbine intake air temperature control apparatus of the present embodiment, no external heat dissipating equipment such as a cooling tower for dissipating the waste heat of the condenser of the refrigerator 21 which is common in the conventional intake air cooling apparatus to the outside is installed. This is because the cooling tower water is cooled by partial evaporation of the cooling tower water in the cooling tower, so that the impurity concentration is high, and chemicals for suppressing the generation of microorganisms in the cooling tower water are injected. This is for avoiding a decrease in efficiency of the refrigerator 21 when the contamination on the cooling water side flows into the cold water side because the water quality is very poor due to the reasons such as

  Further, in the invention of the gas turbine intake air temperature control device of the present embodiment, the waste heat of the refrigerator 21 that has been released to the outside as waste heat in the conventional intake air cooling device is effective for improving the power generation efficiency of the combined power generation facility. It is used for.

  When cooling the intake air of the gas turbine compressor 6 of the gas turbine power generation facility 5 using the gas turbine intake air temperature control device of the present embodiment, the heat exchanger installed in the air intake path 1 of the gas turbine compressor 6 The command calculated by the control device 100 based on the detected value of the intake air temperature detected by the temperature detector 4 so that the intake air temperature detected by the temperature detector 4 installed on the outlet side 3 matches the set temperature. The switching control device 28 is operated by the signal, and the cold water 25 produced by the evaporator of the absorption chiller 21 is supplied to the heat exchanger 3 through the switching control device 28.

  At this time, since the switching adjustment device 28 performs an operation of supplying the cold water 25 to the heat exchanger 3 by a command signal from the control device 100, the operation of the switching device 29 is switched by the command signal from the control device 100. By performing in synchronization with the operation of the device 28, the flow path from the heat exchanger 3 to the evaporator of the absorption refrigerator 21 is switched to the cold water side by switching the switching device 29.

  The chilled water 25 after the intake of the gas turbine compressor 6 is cooled by the heat exchanger 3 by the synchronized operation of the switching adjustment device 28 and the switching device 29 by the command signal from the control device 100 is an absorption type. Water is returned to the cold water production site of the refrigerator 21.

  Here, excess chilled water 25 that cannot be used in the heat exchanger 3 is installed in a branch pipe that branches from the chilled water pipe 26 according to a command signal from the control device 100 and reaches a cooler 32 that cools the gas turbine generator 10. The efficiency of the gas turbine generator 10 can be improved by operating the control valve 31 thus supplied to the cooling water cooler 32 of the gas turbine generator 10.

  Further, when the intake air of the gas turbine compressor 6 is being cooled, the cooling water 34 at the outlet of the absorption refrigeration machine 21 is not used in the heat exchanger 3, so that the cooling water 34 is a command from the control device 100. By operating a control valve 37 installed in a branch pipe branched from the cooling water pipe 33 to the fuel heater 38 according to a signal, the cooling water 34 is supplied to the fuel heater 38, and the fuel heater 38 It is possible to improve the efficiency of the gas turbine power generation facility 5 by heating the fuel 8 supplied to the fuel and raising the fuel temperature.

  Similarly, when cooling the intake air of the gas turbine compressor 6, the cooling water 34 at the outlet of the absorption refrigeration machine 21 is not used in the heat exchanger 3, so that the cooling water 34 is the cooling water pipe 33. The control valve 45 installed in the branch pipe leading to the heat exchanger 43 installed in the extraction steam pipe for branching from the steam turbine 15 and leading the extraction steam 22 from the steam turbine 15 to the absorption refrigerator 21 is supplied from the control device 100. A part of the cooling water 34 manufactured by the absorption refrigerator 21 by operating according to the command signal is supplied to the heat exchanger 43, and the water supplied to the waste heat recovery boiler 12 from the condenser 17 is heated. By increasing the feed water temperature, it is possible to improve the efficiency of the steam turbine power generation facility 14.

  The cold water 25 after heat exchange with the cooling water cooler 32 passes through the cold water return pipe 30 to the cold water production site of the absorption chiller 21, the cooling water 34 after heat exchange with the fuel heater 38, and the The cooling water 34 after heat exchange in the heat exchanger 43 is returned to the cooling water production location of the absorption refrigerator 21.

  On the other hand, when the intake air of the gas turbine compressor 6 of the gas turbine is heated using the gas turbine intake air temperature adjusting device of the present embodiment, the intake air temperature detected by the temperature detector 4 and the set temperature are matched. In response to a command signal from the control device 100, the cooling water 34 of the absorption refrigeration machine 21 is supplied to the heat exchanger 3 via the switching adjustment device 28.

  At this time, since the switching adjustment device 28 is supplied with cooling water, the switching device 29 is also operated in synchronization with the operation of the switching adjustment device 28, and the cooling water 34 that returns from the heat exchanger 3 to the absorption chiller 21. The flow path is switched to the cooling water side.

  As a result, the cooling water 34 after the intake air of the gas turbine compressor 6 of the gas turbine is heated by the heat exchanger 3 passes through the switching device 29 and is supplied to the absorption chiller 21 through the cooling water return pipe 35. Water is returned to the location.

  Here, the merit at the time of heating the intake air of the gas turbine compressor 6 of the gas turbine using the gas turbine intake air temperature control device according to the present embodiment will be described.

  In the gas turbine intake air temperature control device according to the present embodiment, the cooling water of the condenser of the refrigerator is used as a heat source when heating the intake air of the gas turbine compressor 6 of the gas turbine. The ratio of the cooling water heat output of the condenser condenser to the heat input to the refrigerator such as steam, hot water, electricity, etc. is 1.6 to 1.7 in the case of a vapor absorption type refrigerator, and 2 It is 2.0 to 2.1 for heavy effects, and about 6 for a compression refrigerator.

  On the other hand, in the intake air heating method according to the prior art, steam or hot water serving as a heat source is supplied directly or indirectly to a heat exchanger installed in the air inlet passage of the gas turbine without passing through a refrigerator. Therefore, the ratio of the heat output to the input heat does not exceed 1 at the maximum.

  That is, when the intake air of the gas turbine compressor 6 of the gas turbine is heated using the gas turbine intake air temperature control device according to the present embodiment, steam, hot water, electricity, etc. Since the amount of input heat can be reduced to half or less, it is possible to minimize a decrease in power generation efficiency due to energy loss due to intake air heating from the power generation facility.

  From the above, if the gas turbine intake air temperature control device according to the present embodiment is used, cold water and cooling water that are not used for heating or cooling the intake of the gas turbine can be effectively used in the combined power generation facility. Thus, it is possible to improve the power generation efficiency.

  Furthermore, since the amount of input heat when the intake air of the gas turbine is heated can be minimized, a decrease in power generation efficiency associated with heat extraction for intake air heating can be minimized. In addition, since the refrigerator is used for intake and cooling of the gas turbine, it is possible to increase the facility utilization rate throughout the year, so that it is easy to obtain a gain commensurate with the initial investment.

  According to the present embodiment, the supply of cold water and cooling water generated in the refrigerator is switched to exchange heat with the air sucked into the gas turbine compressor to cool or heat the air, and during the cooling operation of the intake air, the gas turbine And an intake air temperature control device for a gas turbine that can improve the efficiency of the combined power plant during the intake air heating operation.

  The present invention is applicable to an intake air temperature adjusting device for a gas turbine.

  1: Air inflow path, 2: Temperature detector, 3: Heat exchanger, 4: Temperature detector, 5: Gas turbine power generation equipment, 6: Gas turbine compressor, 7: Combustor, 8: Fuel piping, 9: Gas turbine, 10: Gas turbine generator, 11: Exhaust exhaust path, 12: Exhaust heat recovery boiler, 13: Steam piping, 14: Steam turbine power generation equipment, 15: Steam turbine, 16: Steam turbine generator, 17: Recovery Water supply, 18: Water supply pump, 19: Condenser inlet cooling water, 20: Condenser outlet cooling water, 21: Absorption refrigerator, 22: Extraction steam, 23: Control valve, 24: Cold water circulation pump, 25 : Cold water, 26: cold water piping, 27: temperature detector, 28: switching control device, 29: switching device, 30: cold water return piping, 31: control valve, 32: gas turbine generator cooling water cooler, 33: cooling Water piping, 34: Cooling water, 35: Cooling water return Pipe: 36: Cooling water circulation pump, 37: Control valve, 38: Fuel heater, 39: Three-way temperature control valve, 40: Cooling tower, 41: Air flow control valve, 43: Heat exchanger, 45: Control valve, 100 :Control device.

Claims (3)

A combined power generation facility is constituted by a gas turbine, a steam turbine that uses steam generated from an exhaust heat recovery boiler that uses exhaust gas from the gas turbine as a heat source, and a generator driven by these gas turbine and steam turbine,
A heat exchanger for cooling or heating air sucked into a gas turbine compressor constituting the gas turbine of the combined power generation facility,
A refrigerator that produces cold water and cooling water as a heat medium for cooling the heat exchanger,
A system of chilled water piping for supplying cold water produced by the refrigerator as a heat medium for cooling the heat exchanger, and supplying cooling water produced by the refrigerator as a heat medium for heating the heat exchanger. Each has a cooling water piping system,
A cooling water return piping system and a cooling water return piping system each for returning cold water or cooling water of the heat medium heat-exchanged in the heat exchanger to the refrigerator;
The cold water pipe and the cooling water pipe are connected together, and includes a switching adjustment device that switches the cold water or the cooling water produced by the refrigerator and supplies either the cold water or the cooling water to the heat exchanger,
It is connected to both the cold water return pipe and the cooling water return pipe, and includes a switching device for switching either the cold water or the cooling water of the heat medium heat-exchanged by the heat exchanger and returning it to the refrigerator.
The refrigerating machine is an absorption refrigerating machine driven by steam extracted from a steam turbine, and supplies cold water to the heat exchanger. Is configured to switch the chilled water after heat exchange with the heat exchanger by the switching device according to the command signal from the control device and return it to the evaporator in the absorption refrigeration machine through the chilled water return pipe. When the cooling water is supplied to the cooler, the cooling water after the heat exchange is switched by the switching device by the switching device according to the command signal from the control device, and the cooling water is returned to the condenser in the absorption refrigerator through the cooling water return pipe. An intake air temperature control device for a gas turbine, characterized in that it is configured to return . In the intake temperature control device for a gas turbine according to claim 1,
When the cold water produced by the evaporator of the refrigerator is supplied to the heat exchanger that cools or heats the air sucked into the gas turbine compressor to cool the air sucked into the gas turbine compressor, the refrigeration A part of the cooling water produced by the condenser of the machine is branched from the cooling water pipe and supplied to the fuel system of the fuel supplied to the combustor of the gas turbine, or from the condenser to the exhaust heat recovery boiler It is supplied to another heat exchanger installed in the water supply system that supplies the feed water, and is used to heat the feed water of the fuel of the gas turbine or the exhaust heat recovery boiler, and heat is exchanged by the fuel heater or another heat exchanger. An intake air temperature adjusting device for a gas turbine, wherein the cooling water is returned to the evaporator of the refrigerator through the cooling water return pipe. In the intake temperature control device for a gas turbine according to claim 1,
When the cooling water produced by the condenser of the refrigerator is supplied to the heat exchanger that cools or heats the air sucked into the gas turbine compressor and the air sucked into the gas turbine compressor is heated, A part of the cold water produced by the condenser of the refrigerator is branched from the cold water pipe and supplied to the cooler for cooling the generator of the gas turbine, and used for cooling the cooling water of the generator of the gas turbine, An intake air temperature control device for a gas turbine, wherein the cold water heat-exchanged by a cooler is returned to the evaporator of the refrigerator through the cold water return pipe.

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