A gas turbine high-efficiency cooling and intake temperature regulation system

Abstract

This utility model discloses a high-efficiency cooling and intake air temperature regulation system for a gas turbine, relating to the field of gas turbine technology. It includes: a gas turbine working loop, consisting of a compressor, combustion chamber, and turbine connected in sequence; an extraction cooling loop, including a separate heat pipe heat exchanger connecting the compressor and turbine; and an energy utilization loop, including a multi-stage absorption refrigeration cycle consisting of an absorber, generator, condenser, and evaporator. The separate heat pipe heat exchanger is used to cool the air extracted from the compressor and supply it to the turbine for cooling. The heat source side of the generator is connected to the cold source side of the separate heat pipe heat exchanger, and the cooling output end of the evaporator is connected to the compressor's intake pipeline via an air cooler. This utility model effectively solves the problem of limited output of gas turbine combined cycle systems due to high intake air temperature under high-temperature conditions in summer; simultaneously, the temperature of the extracted air used for cooling is further reduced, greatly improving the cooling effect of the gas turbine.

Description

Technical Field

[0001] This utility model relates to the field of gas turbine technology, specifically to a high-efficiency cooling and intake temperature regulation system for gas turbines. Background Technology

[0002] As the core equipment of a gas-steam combined cycle power generation system, the performance of the gas turbine directly affects the overall operating efficiency and economy of the power plant. In actual operation, especially in the high-temperature environment of summer, the gas turbine inlet air temperature often significantly exceeds the design value of the ISO standard operating conditions (15℃, 0.10135MPa, 60% relative humidity). This phenomenon triggers a series of chain reactions: high temperature leads to a decrease in inlet air density, which, under the constant volumetric flow rate operating characteristics of the gas turbine, directly results in a reduction in mass flow rate, thus affecting the output power; at the same time, the increase in inlet air temperature also increases the power consumption of the compressor, reduces the pressure ratio, and ultimately leads to a decrease in the cycle thermal efficiency of the entire system.

[0003] As modern heavy-duty gas turbines continue to evolve towards higher parameters and compressor pressure ratios continue to increase, turbine inlet temperatures have exceeded 1700℃, making the cooling of hot-end components even more critical. While currently widely used air-cooling technology can meet basic cooling requirements, the increased consumption of cooling air not only affects the safe operation of the gas turbine but also leads to reduced thermal efficiency, creating a conflict between operating efficiency and cooling demands. Several solutions have been proposed to address this technical challenge, but all have significant limitations. Steam cooling technology, although highly efficient, suffers from uneven cooling due to significant temperature variations, leading to thermal stress concentration and thus limited adoption. External coolers reduce cooling air consumption by lowering the air temperature, but fail to effectively utilize the energy of compressed air, resulting in poor economic efficiency.

[0004] Although the exhaust gas waste heat-based intake cooling device proposed in the existing patent CN109322748A innovatively utilizes the exhaust gas waste heat to convert it into cold energy, it is limited by the acid dew point temperature of the flue gas. If the flue gas temperature is too low after heat exchange, it will cause corrosion of the heat exchanger, and the requirements for heat exchange temperature control are extremely strict.

[0005] While the secondary air system with an external compressor proposed in the existing patent CN109322748A can ensure the cooling effect of the turbine blades, the extracted compressed air fails to effectively improve the performance of the gas turbine itself, and the cooling temperature drop is limited by the high-pressure cooling water system.

[0006] In summary, none of the existing patents mentioned above have solved the problem of balancing efficiency and energy consumption in gas turbine intake cooling under high-temperature conditions. There is an urgent need to develop more innovative cooling technology solutions that can effectively utilize system surplus energy while ensuring cooling performance, thereby achieving overall optimization of gas turbine performance. Utility Model Content

[0007] The main purpose of this invention is to propose a high-efficiency cooling and intake temperature regulation system for gas turbines, so as to solve the problem of balancing efficiency and energy consumption in gas turbine intake cooling under high-temperature conditions in the prior art.

[0008] To achieve the above objectives, this utility model proposes a specific technical solution for a high-efficiency cooling and intake air temperature regulation system for gas turbines, as follows:

[0009] A high-efficiency cooling and inlet air temperature regulation system for a gas turbine includes:

[0010] The gas turbine working circuit includes a compressor, a combustion chamber, and a turbine connected in sequence;

[0011] The exhaust cooling circuit includes a split heat pipe heat exchanger connecting the compressor and the turbine;

[0012] The energy utilization loop includes a multi-stage absorption refrigeration cycle consisting of an absorber, a generator, a condenser, and an evaporator;

[0013] The split heat pipe heat exchanger is used to cool the air drawn from the compressor and then supply it to the turbine for cooling. The heat source side of the generator is connected to the cold source side of the split heat pipe heat exchanger, and the cold output end of the evaporator is connected to the air inlet pipe of the compressor through an air cooler.

[0014] Furthermore, the compressor is connected to the heat source side inlet of the split heat pipe heat exchanger, and the turbine is connected to the heat source side outlet of the split heat pipe heat exchanger.

[0015] Furthermore, the compressor is equipped with a staged extraction structure, including a low-pressure extraction outlet, a medium-pressure extraction outlet and a high-pressure extraction outlet arranged sequentially along the airflow direction. Each extraction outlet is connected to the heat source side inlet of the split heat pipe heat exchanger through an independent extraction pipeline.

[0016] Furthermore, the turbine is provided with a staged cooling structure, including a low-pressure cooling gas inlet, a medium-pressure cooling gas inlet and a high-pressure cooling gas inlet. Each cooling gas inlet is connected to the heat source side outlet of the split heat pipe heat exchanger through an independent cooling gas pipeline. The cooling gas pipeline is connected to the extraction pipeline of the same pressure level through the split heat pipe heat exchanger.

[0017] Furthermore, the multi-stage absorption refrigeration cycle includes:

[0018] The first generator has its heat source side connected to the cold source side of the split heat pipe heat exchanger;

[0019] The second generator has its heat source input terminal connected to the steam output terminal of the first generator;

[0020] The third generator has its heat source input terminal connected to the steam output terminal of the second generator;

[0021] The heat source output terminals of the second generator and the third generator are connected to the condenser, and the steam output terminal of the third generator is connected to the condenser.

[0022] Furthermore, the multi-stage absorption refrigeration cycle also includes:

[0023] The first absorber forms a first-stage cycle with the first generator through a first solution circuit, and forms a second-stage cycle with the second generator through a second solution circuit;

[0024] The second absorber forms a third-stage cycle with the third generator through a third solution circuit;

[0025] Each of the aforementioned solution circuits is connected to a solution heat exchanger.

[0026] Furthermore, the solution outlets of the first absorber and the second absorber are respectively equipped with a first solution pump and a second solution pump.

[0027] Furthermore, the multi-stage absorption refrigeration cycle also includes:

[0028] The first throttle valve is connected to the outlet of the condenser and the inlet of the evaporator.

[0029] A refrigerant water pump is connected between the evaporator outlet and the first absorber and the second absorber.

[0030] Furthermore, it also includes a composite heat source circuit, which includes a hot water storage tank connected to the heat source side of the third generator, a solar collector connected to the hot water storage tank, a second throttle valve and a water pump connected between the third generator and the hot water storage tank.

[0031] Furthermore, the gas turbine working circuit also includes a cooling tower, and the absorber and the condenser are connected to the cooling tower in parallel via a cooling water circulation pipeline.

[0032] Furthermore, it also includes an energy recovery loop, which is connected to the gas turbine working circuit to recover the waste heat in the high-temperature exhaust gas of the gas turbine working circuit and convert the recovered energy into electrical energy or other useful energy.

[0033] Furthermore, the energy recovery loop adopts the traditional Rankine cycle with water as the working fluid, or it can also adopt an organic Rankine cycle system or a Karina cycle system.

[0034] Based on the above technical solution, this utility model has at least the following beneficial effects:

[0035] 1. This utility model proposes a high-efficiency cooling and intake air temperature regulation system for gas turbines. It uses compressor air extraction as a driving heat source, recovers the heat energy of high-temperature air to drive a refrigeration cycle, and continuously produces low-temperature chilled water to reduce the compressor intake air temperature, increase the unit's output power, and effectively improve the overall performance and economy of the unit.

[0036] 2. This utility model proposes a high-efficiency cooling and intake air temperature regulation system for gas turbines. The air drawn from the compressor is cooled and then used for cooling the hot end of the turbine, thereby improving cooling efficiency, reducing damage to turbine blades caused by high temperatures, extending the service life of the turbine, and improving the operational stability of the unit.

[0037] 3. This utility model proposes a high-efficiency cooling and intake air temperature regulation system for gas turbines. Under the action of the circulating refrigeration subsystem, the temperature of the air drawn by the compressor is further reduced, which further improves the cooling effect of the gas turbine and provides a new technical approach for the cooling design of modern gas turbines.

[0038] 4. This utility model proposes a high-efficiency cooling and intake air temperature regulation system for gas turbines. Through the thermal buffering effect of the hot water storage tank, it realizes the efficient synergistic utilization of multiple energy sources. The solar collector serves as an auxiliary heat source, complementing the gas turbine's exhaust heat source. It automatically adjusts the supplied heat according to the operating conditions, enabling the system to operate stably even when the gas turbine load changes or solar energy is insufficient, significantly improving the flexibility and reliability of energy utilization. Attached Figure Description

[0039] The accompanying drawings, which form part of this specification, are used to provide a further understanding of this utility model. The illustrative embodiments and descriptions of this utility model are used to explain this utility model and do not constitute an undue limitation thereof. In the drawings:

[0040] Figure 1 This utility model presents a schematic diagram of a gas turbine high-efficiency cooling and intake air temperature regulation system.

[0041] Reference numerals: 1-Compressor; 2-Combustion chamber; 3-First-stage turbine; 4-Second-stage turbine; 5-Third-stage turbine; 6-HRSG; 7-Chimney; 8-Cooling tower; 9-First absorber; 10-Second absorber; 11-First solution pump; 12-Second solution pump; 13-First solution heat exchanger; 14-Second solution heat exchanger; 15-Third solution heat exchanger; 16-First generator; 17-Second generator; 18-Third generator; 19-Condenser; 20-Throttle valve; 21-Evaporator; 22-Refrigerant water pump; 23-Cooling water pump; 24-Separated heat pipe heat exchanger; 25-Air cooler; 26-Throttle valve; 27-Water pump; 28-Hot water storage tank; 29-Solar collector. Detailed Implementation

[0042] The present invention will be further described in detail below with reference to specific embodiments. These embodiments should not be construed as limiting the scope of protection claimed by the present invention.

[0043] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0044] To address the efficiency and energy consumption balance issues in intake air cooling of gas turbines under high-temperature environments in existing technologies, this invention proposes a high-efficiency cooling and intake air temperature regulation system for gas turbines. This system uses the heat from the compressor exhaust gas used for cooling the turbine as a heat source, replacing the waste heat from the flue gas. The heat from the exhaust gas is converted into cooling capacity for the gas turbine inlet, reducing the compressor inlet air temperature and thus improving the economic efficiency of the gas turbine and combined cycle system in high-temperature summer environments. Simultaneously, utilizing the heat from the compressor exhaust gas further reduces the temperature of the exhaust gas, enhancing the cooling effect of the gas turbine and ensuring safe operation in the high-temperature region of the turbine. The invention will be described below with reference to specific embodiments.

[0045] Example

[0046] See Figure 1The diagram illustrates a specific implementation of a high-efficiency cooling and intake air temperature regulation system for a gas turbine. This regulation system includes a gas turbine operating circuit, an extraction cooling circuit, and an energy utilization circuit. The gas turbine operating circuit includes a compressor 1, a combustion chamber 2, a first-stage turbine 3, a second-stage turbine 4, a third-stage turbine 5, a waste heat boiler (HRSG) 6, a chimney 7, a cooling tower 8, and an engine. The extraction cooling circuit includes a separate heat pipe heat exchanger 24. The energy utilization circuit includes a first absorber 9, a second absorber 10, a first solution pump 11, a second solution pump 12, a first solution heat exchanger 13, a second solution heat exchanger 14, a third solution heat exchanger 15, a first generator 16, a second generator 17, a third generator 18, a condenser 19, a throttle valve 20, an evaporator 21, a refrigerant water pump 22, a cooling water pump 23, an air cooler 25, a throttle valve 26, a water pump 27, a hot water storage tank 28, and a solar collector 29.

[0047] Specifically, in the working circuit of the gas turbine, compressor 1, combustion chamber 2, first-stage turbine 3, second-stage turbine 4, third-stage turbine 5, waste heat boiler (HRSG) 6, chimney 7 and cooling tower 8 are connected in sequence, and the engine is coaxially connected to compressor 1 and each stage of turbine.

[0048] Specifically, in the extraction cooling circuit, the heat source side of the split heat pipe heat exchanger 24 is connected to the compressor 1 and the turbine. The compressor 1 is connected to the heat source side inlet, and the turbine is connected to the heat source side outlet. Low-pressure extraction outlet, medium-pressure extraction outlet, and high-pressure extraction outlet are respectively provided in the low-pressure, medium-pressure, and high-pressure sections of the compressor 1. Each extraction outlet is connected to the heat source side inlet of the split heat pipe heat exchanger 24 via an extraction pipeline. The first-stage turbine 3 is provided with a first-stage stationary blade cooling gas inlet and a first-stage moving blade cooling gas inlet, and the second-stage turbine 4 is provided with a second-stage stationary blade cooling gas inlet. Each cooling gas inlet is connected to the heat source side outlet of the split heat pipe heat exchanger 24 via a cooling gas pipeline. The extraction air pipeline and the cooling air pipeline correspond one-to-one. The extracted air from the low-pressure extraction outlet is cooled and then flows into the cooling air inlet of the secondary stationary blade through the cooling air pipeline. The extracted air from the medium-pressure extraction outlet is cooled and then flows into the cooling air inlet of the primary moving blade through the cooling air pipeline. The extracted air from the high-pressure extraction outlet is cooled and then flows into the cooling air inlet of the primary stationary blade through the cooling air pipeline.

[0049] Specifically, in the energy utilization loop, the heat source side of the first generator 16 is cyclically connected to the cold source side of the split heat pipe heat exchanger 24. The steam output end of the first generator 16 is connected to the heat source inlet of the second generator 17, the heat source outlet of the second generator 17 is connected to the condenser 19, the steam output end of the second generator 17 is connected to the heat source inlet of the third generator 18, the heat source outlet of the third generator 18 is connected to the condenser 19, and its steam output end (refrigerant side) is also connected to the condenser 19. The first generator 16 and the first absorber 9 are cyclically connected to form a first solution circulation loop (lithium bromide solution), and the first solution heat exchanger 13 is connected in the first solution circulation loop; the second generator 17 is also cyclically connected to the first absorber 9 to form a second solution circulation loop, and the second solution heat exchanger 14 is connected in the second solution circulation loop; the third generator 18 and the second absorber 10 are cyclically connected to form a third solution circulation loop, and the third solution heat exchanger 15 is connected in the third solution circulation loop. The first solution pump 11 is connected to the solution outlet near the first absorber 9. The first solution pump 11 is used to pressurize the dilute lithium bromide solution in the first absorber 9 and send it to the first generator 16 and the second generator 17. The second solution pump 12 is connected to the solution outlet near the second absorber 10. The second solution pump is used to pressurize the dilute lithium bromide solution in the second absorber 10 and send it to the third generator 18.

[0050] Specifically, the heat source side of the third generator 18 is also circulatedly connected to the hot water storage tank 28. A throttle valve 26 is connected in the flow path between the outlet of the hot water storage tank 28 and the inlet of the third generator 18. A water pump 27 is connected in the flow path between the outlet of the third generator 18 and the inlet of the hot water storage tank 28. The solar collector 29 is connected to the hot water storage tank 28. The hot water storage tank 28 serves as a second heat source for the third generator 18, and after heat exchange, the water returns to the hot water storage tank 28 to continue circulating. The solar collector 29 is used to heat the water in the hot water storage tank 28.

[0051] Specifically, the air cooler 25 is connected to the intake pipe of the compressor 1, and is circulated to the evaporator 21, with refrigerant water in the circulation pipe. The input end of the evaporator 21 is connected to the output end of the condenser 19, and a throttle valve 20 is connected between the condenser 19 and the evaporator 21. The refrigerant vapor output end of the evaporator 21 is connected to the input ends of the first absorber 9 and the second absorber 10. The evaporator 21 is also connected to a refrigerant water pump 22. The condensate output end of the air cooler 25 is connected to a cooling tower.

[0052] Specifically, the condenser 19, the first absorber 9, and the second absorber 10 are connected in parallel to the cooling tower 8 in a circulating manner. The cooling water pump 23 is connected in the circulating pipeline near the cooling water outlet of the cooling tower 8. The cooling water in the circulating pipeline is used to remove the heat generated in the condenser 19, the first absorber 9, and the second absorber 10.

[0053] The working process of the above-mentioned high-efficiency cooling and intake air temperature regulation system for gas turbines is as follows:

[0054] In the air extraction cooling circuit, a certain amount of air is extracted from the low-pressure section, medium-pressure section and high-pressure section of the compressor 1. The extracted air flows through the corresponding extraction pipeline through each extraction outlet and flows into the separate heat pipe heat exchanger 24 for cooling. The cooled extracted air becomes the cooling airflow and flows through the corresponding cooling air pipeline and enters the turbine 3 through each cooling air inlet for cooling.

[0055] In the energy utilization loop, the dilute lithium bromide solution generated by the first absorber 9 is heated by the first solution pump 11 through the first solution heat exchanger 13 and the second solution heat exchanger 14, and then enters the first generator 16 and the second generator 17. The concentrated lithium bromide solutions from the first generator 16 and the second generator 17 are cooled by the first solution heat exchanger 13 and the second solution heat exchanger 14, respectively, and then return to the first absorber 9. The dilute lithium bromide solution generated by the second absorber 10 is heated by the second solution pump 12 through the third solution heat exchanger 15 and then enters the third generator 18. The concentrated lithium bromide solution from the third generator 18 is cooled by the third solution heat exchanger 15 and then returns to the second absorber 10.

[0056] The split-type heat pipe heat exchanger 24 directs the heat released from the air drawn from the compressor 1 into the first generator 16, which serves as the driving heat source for the first generator 16. This heat heats the solution inside the first generator 16, releasing it and supplying refrigerant vapor (point a) to the second generator 17. This portion of the refrigerant vapor acts as the driving heat source for the second generator 17, and the condensed refrigerant liquid (point b) is supplied to the condenser 19. The solution in the second generator 17 is heated and released, supplying refrigerant vapor (point c) to the third generator 18. This portion of the refrigerant vapor serves as one of the driving heat sources for the third generator 18, the other being solar thermal collectors that generate hot water. The condensed refrigerant liquid (point d) is supplied to the condenser 19. The solution in the third generator 18 is heated and then supplied with refrigerant vapor (point e) to the condenser 19. Refrigerant vapor (point e) and refrigerant liquid (points b and d) are cooled and condensed into refrigerant water (point f) in condenser 19. After being depressurized by throttling valve 20, it enters evaporator 21. Due to the very low pressure in evaporator 21, the refrigerant water absorbs heat and evaporates, becoming low-temperature steam (point g), which then enters the first absorber 9 and the second absorber 10. To improve the flexibility of system operation, a solar water heating device is added as a supplementary driving heat source. Solar collector 29 collects solar energy to heat the circulating water and stores it in hot water storage tank 28. Once the hot water in the tank reaches a certain temperature, it enters the third generator through electric valve 27 as one of the driving heat sources. After heat exchange, it returns to the system to continue circulating.

[0057] After the refrigerant water in condenser 19 is depressurized, it flows into evaporator 21 under the action of refrigerant water pump 22. Because the pressure in evaporator 21 is very low, the refrigerant water absorbs heat and evaporates in evaporator 21, becoming low-temperature steam that enters the first absorber 9 and the second absorber 10. At the same time, the circulation pipe on one side of evaporator 21 releases heat, and the temperature of the refrigerant water in the circulation pipe decreases, producing cold water. The cold water cools the air in the intake pipe of compressor 1 through the circulation pipe on one side of air cooler 25.

[0058] Furthermore, the aforementioned high-efficiency cooling and inlet air temperature regulation system for the gas turbine also includes an energy recovery loop, which is connected to the gas turbine's operating loop to form a combined loop. This energy recovery loop recovers waste heat from the high-temperature exhaust gas discharged from the gas turbine, further improving the overall thermal efficiency of the system and converting the recovered energy into electrical energy or other useful forms. The energy recovery loop can be selected from several bottom-loop systems:

[0059] The Rankine cycle system includes a boiler, a steam turbine, a condenser, and a feedwater pump. The boiler uses the waste heat of the high-temperature exhaust gas to convert water into steam. The steam expands and does work in the steam turbine, is cooled in the condenser, and is then sent back to the boiler by the feedwater pump.

[0060] The Organic Rankine Cycle (ORC) system includes an evaporator, an organic working fluid turbine, a condenser, and a working fluid pump. The evaporator uses the waste heat of the high-temperature exhaust gas to vaporize the organic working fluid. The organic working fluid vapor expands and does work through the turbine, is then cooled in the condenser, and is pumped back to the evaporator by the working fluid pump.

[0061] The Kalina cycle system includes an evaporator, an ammonia-water working fluid turbine, a condenser, a separator, and an absorber. The evaporator uses the waste heat of the high-temperature exhaust gas to vaporize the ammonia-water working fluid. The ammonia-water vapor expands and does work through the turbine, is cooled in the condenser, and is then separated by the separator and sent back to the evaporator or absorber to complete the cycle.

[0062] This utility model provides a high-efficiency cooling and intake air temperature regulation system for gas turbines, which not only cools the compressor inlet air, effectively solving the problem of limited output of gas turbine combined cycle systems under high-temperature conditions in summer; at the same time, the temperature of the extraction air used for cooling is further reduced, greatly improving the cooling effect of the gas turbine, and providing a new technical approach for the cooling design of modern gas turbines.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0064] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0065] It should be noted that, in the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A high efficiency cooling and inlet air temperature conditioning system for a gas turbine engine characterized by, include: The gas turbine working circuit includes a compressor, a combustion chamber, and a turbine connected in sequence; The exhaust cooling circuit includes a split heat pipe heat exchanger connecting the compressor and the turbine; The energy utilization loop includes a multi-stage absorption refrigeration cycle consisting of an absorber, a generator, a condenser, and an evaporator; The split heat pipe heat exchanger is used to cool the air drawn from the compressor and then supply it to the turbine for cooling. The heat source side of the generator is connected to the cold source side of the split heat pipe heat exchanger, and the cold output end of the evaporator is connected to the air inlet pipe of the compressor through an air cooler.

2. The gas turbine high-efficiency cooling and inlet air temperature conditioning system of claim 1, wherein: The compressor is connected to the heat source side inlet of the split heat pipe heat exchanger, and the turbine is connected to the heat source side outlet of the split heat pipe heat exchanger.

3. The gas turbine high-efficiency cooling and inlet air temperature conditioning system of claim 2, wherein: The compressor is equipped with a staged extraction structure, including a low-pressure extraction outlet, a medium-pressure extraction outlet and a high-pressure extraction outlet arranged sequentially along the airflow direction. Each extraction outlet is connected to the heat source side inlet of the split heat pipe heat exchanger through an independent extraction pipeline.

4. The gas turbine high-efficiency cooling and inlet air temperature conditioning system of claim 3, wherein: The turbine is equipped with a staged cooling structure, including a low-pressure cooling gas inlet, a medium-pressure cooling gas inlet and a high-pressure cooling gas inlet. Each cooling gas inlet is connected to the heat source side outlet of the split heat pipe heat exchanger through an independent cooling gas pipeline. The cooling gas pipeline is connected to the extraction pipeline of the same pressure level through the split heat pipe heat exchanger.

5. The gas turbine high-efficiency cooling and inlet temperature regulation system according to claim 1, characterized in that The multi-stage absorption refrigeration cycle includes: The first generator has its heat source side connected to the cold source side of the split heat pipe heat exchanger; The second generator has its heat source input terminal connected to the steam output terminal of the first generator; The third generator has its heat source input terminal connected to the steam output terminal of the second generator; The heat source output terminals of the second generator and the third generator are connected to the condenser, and the steam output terminal of the third generator is connected to the condenser.

6. The gas turbine high-efficiency cooling and inlet temperature regulation system according to claim 5, characterized in that The multi-stage absorption refrigeration cycle also includes: The first absorber forms a first-stage cycle with the first generator through a first solution circuit, and forms a second-stage cycle with the second generator through a second solution circuit; The second absorber forms a third-stage cycle with the third generator through a third solution circuit; Each of the aforementioned solution circuits is connected to a solution heat exchanger.

7. The gas turbine high-efficiency cooling and inlet air temperature conditioning system according to claim 6, characterized in that: The solution outlets of the first absorber and the second absorber are respectively equipped with a first solution pump and a second solution pump.

8. The gas turbine high-efficiency cooling and inlet temperature regulation system according to claim 7, characterized in that The multi-stage absorption refrigeration cycle also includes: The first throttle valve is connected to the outlet of the condenser and the inlet of the evaporator. A refrigerant water pump is connected between the evaporator outlet and the first absorber and the second absorber.

9. The gas turbine high-efficiency cooling and inlet air temperature conditioning system according to claim 5, characterized in that: It also includes a composite heat source circuit, which includes a hot water storage tank connected to the heat source side of the third generator, a solar collector connected to the hot water storage tank, a second throttle valve and a water pump connected between the third generator and the hot water storage tank.

10. The high-efficiency gas turbine cooling and inlet air temperature conditioning system of any of claims 1-9, wherein: The engine working loop further comprises a cooling tower, and the absorber and the condenser are connected with the cooling tower through a cooling water circulation pipeline in parallel.

11. The gas turbine high-efficiency cooling and inlet air temperature conditioning system according to claim 10, characterized by: An energy recovery circulation loop is further included, which is connected with the engine working loop, used for recovering waste heat in high-temperature exhaust gas of the engine working loop, and converting the recovered energy into electric energy or other useful energy.

12. The gas turbine high-efficiency cooling and inlet air temperature conditioning system according to claim 11, characterized by: The energy recovery circulation loop adopts a traditional Rankine cycle with water as working medium, and can also adopt an organic Rankin cycle system or a Kalina cycle system.

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