Testing device and method for intercooler of intercooling cycle gas turbine

Abstract

The invention discloses a testing device and method for an intercooler of an intercooling cycle gas turbine, and relates to the technical field of heat energy and power engineering. The testing device comprises a water supply system, a gas supply system and a measurement and control system, and the water supply system comprises a water supplementing loop, a heat exchange loop and a cooling loop which are communicated with one another. According to the test device and the test method, thermal power and resistance performance tests of components of the intercooler with the core body and resistance characteristic tests of shells of the intercooler can be carried out respectively, and whether the performance of each part of the intercooler meets design requirements or not can be fully verified; according to the testing device and method, the flow adjusting range of the gas supply system is large, meanwhile, the running condition of a real intercooling cycle gas turbine can be simulated, the accuracy of performance verification of components of the intercooler can be improved conveniently, meanwhile, the testing requirements of a single intercooler, multiple intercoolers and full-size intercoolers can be met, the application range is wide, and installation is convenient and fast.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal energy and power engineering, and particularly to an intercooler test device and method for an intercooled cycle gas turbine. Background Art

[0002] A gas turbine is a high-speed rotating power machine, which is widely used in scenarios such as power propulsion, gas compression, and power generation modules. The intercooled cycle gas turbine has become one of the main development trends of gas turbines at present due to its characteristics such as high power density, good maneuverability, and low fuel consumption. As one of the core components of the intercooled cycle gas turbine, the intercooler is generally located between the low-pressure compressor and the high-pressure compressor, and is used to cool the air after the low-pressure compressor to facilitate the continuous compression of the high-pressure compressor, thereby increasing the overall pressure ratio of the unit. Considering the processing technology and convenient installation and maintenance, the intercooler of the intercooled cycle gas turbine generally adopts a modular design and is generally composed of 4, 8, or 12 intercoolers according to the power level. The heat transfer performance and resistance characteristics of the intercooler will directly affect the performance indicators of the gas turbine. Therefore, before conducting the overall machine test of the intercooled cycle gas turbine, it is crucial to conduct component tests on the intercooler to fully verify the heat transfer performance and resistance characteristics of the intercooler. Summary of the Invention

[0003] Aiming at the deficiencies of the prior art, the present invention provides an intercooler test device and method for an intercooled cycle gas turbine, which solves the problems proposed in the above background art.

[0004] To achieve the above objectives, the present invention is realized through the following technical solutions. An intercooler test device and method for an intercooled cycle gas turbine, the test device includes: a water supply system, a gas supply system, and a measurement and control system. The water supply system includes a makeup water circuit, a heat exchange circuit, and a cooling circuit that are interconnected.

[0005] The makeup water circuit includes: a makeup water tank, the makeup water tank is hermetically connected to the circulation water tank in the heat exchange circuit through a makeup water pipeline, and an electric control valve I, an electric control valve II, a manual stop valve I, and a manual stop valve II for regulating the flow rate are correspondingly arranged on the makeup water channel. A makeup water pump with a communication pipeline is installed between the makeup water pipelines.

[0006] The heat exchange circuit further includes: a heat exchange pipeline for hermetically connecting an intercooler test piece and the circulation water tank. An electric stop valve for regulating the flow rate and a relief valve for discharging are installed on the heat exchange pipeline. A bypass valve I is installed between the heat exchange pipelines. A circulation water pump and a flow meter are installed on the heat exchange pipeline from the circulation water tank to the intercooler test piece to achieve unidirectional flow. And the heat exchange pipeline is hermetically connected to the heat exchanger in the cooling circuit. A three-way control valve I and a discharge valve are installed on the heat exchange pipeline.

[0007] The cooling circuit also includes: a mixing water tank for cooling water to enter, the mixing water tank is connected to the heat exchanger through a cooling pipe, a filter, a second flow meter and a cooling water pump are installed in sequence on the cooling pipe between the mixing water tank and the heat exchanger, and a second three-way regulating valve is installed on the cooling pipe.

[0008] A further improvement of the technical solution of the present invention is that the air supply system comprises: an air supply pipeline connected to the atmospheric environment, the air supply pipeline is connected to the intercooler test piece, and an auxiliary air supply pipeline is installed on the air supply pipeline, a bypass valve 2 is installed on the auxiliary air supply pipeline, and an electric regulating valve 3, an air source gas turbine and an air source compressor are correspondingly installed at the front and rear ends of the air supply pipeline.

[0009] A further improvement of the technical solution of the present invention is that the measurement and control system includes: a measurement and control flow meter arranged on the air supply pipe, the measurement and control flow meter is close to the intercooler test piece, and the air supply pipes located on both sides of the intercooler test piece are installed with total temperature and total pressure compliance probes, pressure sensors, and temperature sensors.

[0010] The present invention also provides a method for testing an intercooler of an intercooled cycle gas turbine. When the method is used for testing the intercooler, the method comprises the following operations:

[0011] Step 1: First, install the intercooler test piece, connect the water supply system and air supply system pipelines to the test piece, and reasonably design the air inlet turning section of the intercooler and air supply pipeline according to the number of intercoolers to be tested, ensure the uniformity of the air supply of the test piece, and form a closed loop for the entire system;

[0012] Step 2: Start the water supply system. Before starting the water supply system, water should be replenished first. When replenishing water, you need to open the electric regulating valve 1 and electric regulating valve 2 of the water replenishment circuit, close the manual stop valve 1 and stop valve 2, open the ventilation valve on the top of the circulating water tank, close the electric stop valve of the heat exchange circuit, start the water replenishment pump, and replenish fresh water from the water replenishment tank to the circulating water tank. Determine whether to stop the water supply based on the feedback display of the liquid level gauge on the circulating water tank;

[0013] Step 3: After the circulating water tank is filled with fresh water, close the electric regulating valve 1 and the electric regulating valve 2 of the water replenishment circuit, open the electric stop valve of the heat exchange circuit, close the bypass valve 1, start the circulating water pump, and pump the fresh water in the circulating water tank to various places in the heat exchange circuit. After the circulating water tank is basically emptied, fill the circulating water tank with fresh water again according to the water replenishment operation, and then pump the fresh water in the circulating water tank to various places in the heat exchange circuit until the entire heat exchange circuit is filled with fresh water. At this time, close the ventilation valve on the top of the circulating water tank to form a closed heat exchange circuit, open the electric stop valves at various places in the heat exchange circuit in turn to ensure that the circuit is unobstructed, start the circulating water pump, and read the fresh water flow of the heat exchange circuit through the flow meter after the system is stable, and complete the startup of the heat exchange circuit;

[0014] Step 4: Turn on the cooling water pump of the cooling circuit, suck in the cooling water and enter the heat exchanger through the filter to cool the fresh water flowing out of the intercooler test piece. The cooling water flow rate is read through Flowmeter 2. After the fresh water is cooled to a certain temperature, it is recycled. After the cooling water flows through the heat exchanger, it passes through the three-way regulating valve 2. By adjusting the opening degree of the three-way regulating valve 2, part of the cooling water flows back to the mixing tank to be mixed with the unheated cooling water, and the rest of the cooling water is all discharged. Thus, the normal start-up and operation of the water supply system are completed;

[0015] Step 5: Connect temperature sensors, pressure sensors, total temperature and total pressure composite probes, flowmeters, electric control valves, etc. at various parts of the test device to the measurement and control system. Turn on the measurement and control system to ensure that the parameters at each part are read normally. The performance of the intercooler is mainly characterized by the parameter of intercooling degree, as shown in the following formula. Through on-line data acquisition and analysis, the measurement and control system can provide parameters such as the intercooling degree and pressure loss of the intercooler test piece in real time;

[0016]

[0017] In the formula, T3—the inlet temperature of the air side of the intercooler test piece, T5—the outlet temperature of the air side of the intercooler test piece, T1—the inlet temperature of the fresh water side of the intercooler test piece;

[0018] Step 6: Operate the gas source gas turbine to drive the gas source compressor to work. By adjusting the output speed of the gas source gas turbine, make the outlet parameters of the gas source compressor close to the inlet parameters of the gas side of the real gas turbine intercooler, and improve the accuracy of the performance verification of the intercooler test piece;

[0019] Step 7: When the water supply, gas supply and test systems are ready, start the performance test of the intercooler test piece at multiple operating points. The bypass valve 2 and the electric control valve 3 can change the air pressure and flow rate entering the intercooler test piece while the operating conditions of the gas source compressor remain unchanged. First, fully open the bypass valve 2, and open the electric control valve 3 from % to % at intervals of %, to explore the performance of the intercooler under different conditions of the inlet pressure of the gas side; after the electric control valve 3 is opened to %, reduce the opening degree of the bypass valve 2 at intervals of % until it is completely closed, so as to explore the performance of the intercooler under different conditions of the inlet flow rate of the gas side.

[0020] A further improvement of the technical solution of the present invention is that under different usage conditions of the intercooler, the following operations are also included:

[0021] Using the reduced flow rate or Mach number of the inlet air of the intercooler as the independent variable, the variation law of the performance parameters of the intercooler is obtained, and the variation relationship between the intercooler and the total pressure loss with the reduced flow rate of the inlet air of the intercooler is obtained. For intercoolers under different operating conditions, by keeping the reduced flow rate consistent, the heat transfer performance and resistance characteristics of the intercooler are evaluated, providing a reference basis for the design of intercooled cycle gas turbines.

[0022] A further improvement of the technical solution of the present invention is that the method for performance testing of the intercooler test piece at multiple operating points further includes the following operations:

[0023] Fully open the bypass valve II, and sequentially open the electric control valve III from 20% to 100% at intervals of 10% to explore the performance of the intercooler under different conditions of the inlet pressure on the gas side. After the electric control valve III is opened to 100%, reduce the opening degree of the bypass valve II at intervals of 10% until it is completely closed, so as to explore the performance of the intercooler under different conditions of the inlet flow rate on the gas side. After the electric control valve III is opened to 100%, reduce the opening degree of the bypass valve II at intervals of 10% until it is completely closed, so as to explore the performance of the intercooler under different conditions of the inlet flow rate on the gas side.

[0024] A further improvement of the technical solution of the present invention is that the method for performance testing of the intercooler test piece at different fresh water flow rates in the heat exchange circuit further includes any one of the following two operations:

[0025] Adjust the fresh water flow rate by adjusting the working frequency of the circulating water pump;

[0026] Without changing the working frequency of the circulating water pump, change the fresh water flow rate flowing into the intercooler test piece by adjusting the bypass valve I.

[0027] A further improvement of the technical solution of the present invention is that the performance testing of the intercooler test piece at different fresh water temperatures in the heat exchange circuit includes the following operations:

[0028] By adjusting the opening degree of the three-way control valve I in the fresh water pipeline in front of the heat exchanger, part of the fresh water directly returns to the circulation water tank, and part of the fresh water enters the heat exchanger for cooling. The two-way fresh water finally mixes in the circulation water tank, thereby adjusting the outlet temperature of the fresh water in the circulation water tank. In the cooling circuit, a three-way control valve II is set at the outlet of the cooling water side of the heat exchanger. By adjusting the opening degree of this valve, part of the cooled cooling water is directly discharged, and part of the cooling water returns to the mixing tank to be mixed with the uncooled cooling water, thereby adjusting the outlet temperature of the cooling water in the mixing tank.

[0029] A further improvement of the technical solution of the present invention is that when the method is used for intercooler testing, the measurement and control system includes the following operations:

[0030] Through on-line data collection and analysis, parameters such as the intercooling degree and pressure loss of the intercooler test piece can be provided in real time, and the variation relationships of the intercooling degree, pressure loss, etc. with the reduced flow rate or Mach number of the air inlet can be obtained.

[0031] Advantages

[0032] Compared with the prior art, the advantages of the present invention are that the test device and method can respectively conduct the thermal power and resistance performance tests of the intercooler components with the core and the resistance characteristic test of the intercooler housing, which can fully verify whether the performance of each part of the intercooler meets the design requirements; the flow regulation range of the air supply system in the test device and method is large, and at the same time, the operating conditions of a real intercooled cycle gas turbine can be simulated, which is convenient for improving the accuracy of the performance verification of the intercooler components, and at the same time can meet the test needs of single, multiple and full-size intercoolers, with a wide application range and convenient installation;

[0033] In the test device and method, an electric bypass valve is arranged in front of the inlet of the intercooler test piece in the air supply system, and an electric regulating valve is arranged on the outlet pipeline. Through the adjustment of the above two valves, the air pressure and flow rate entering the test piece can be adjusted without changing the operating conditions of the air source compressor, and the inlet parameters can be quickly adjusted under the same working conditions, with a wide measurement range.

[0034] The test device and method can realize the performance test of the intercooler components at different fresh water inlet temperatures. A three-way regulating valve is arranged in front of the heat exchanger. By adjusting the opening of this valve, part of the fresh water can be distributed to first enter the heat exchanger to exchange heat with the cooling circuit and then flow into the circulating water tank, and part of the fresh water directly returns to the circulating water tank, so as to adjust the outlet temperature of the circulating water tank. At the same time, in the cooling circuit, a three-way regulating valve is arranged at the cooling water outlet of the heat exchanger. By adjusting the opening of this valve, part of the seawater after heat exchange returns to the mixing water tank, and part is directly discharged, so as to adjust the outlet temperature of the mixing water tank.

[0035] The fresh water flow rate is adjusted by adjusting the working frequency of the circulating water pump. Secondly, without changing the working frequency of the circulating water pump, the fresh water flow rate flowing into the intercooler test piece can be adjusted by adjusting the bypass valve of the heat exchange circuit. Through the above two measures, a rapid and large-range adjustment of the fresh water flow rate of the on-board heat exchange system is realized.

[0036] The pressure, temperature and flow rate measuring points at each position are all connected to the measurement and control system. At the same time, total temperature and total pressure composite probes are installed at each position of the intercooler test piece. Through the measurement and control system, parameters such as the total pressure loss and intercooling degree of the intercooler can be calculated in real time according to the measured parameters. Description of the Drawings

[0037] Figure 1 It is the schematic diagram of the test device system in the present invention;

[0038] Figure 2Schematic diagram of the water supply system in the present invention;

[0039] Figure 3 Schematic diagram of the make-up water circuit of the water supply system in the present invention;

[0040] Figure 4 Schematic diagram of the heat exchange circuit of the water supply system in the present invention;

[0041] Figure 5 Schematic diagram of the cooling circuit of the water supply system in the present invention;

[0042] Figure 6 Schematic diagram of the gas supply system in the present invention;

[0043] Figure 7 Layout diagram of the test device in the present invention;

[0044] Figure 8 Layout plan of the test piece test in the present invention.

[0045] In the figure, 1. Make-up water tank; 2. Electric control valve I; 3. Make-up water pump; 4. Electric control valve II; 5. Manual stop valve I; 6. Manual stop valve II; 7. Circulation water tank; 8. Electric stop valve; 9. Drain valve; 10. Flowmeter; 11. Bypass valve I; 12. Intercooler test piece; 13. Discharge valve; 14. Three-way control valve I; 15. Circulation water pump; 16. Mixing water tank; 17. Filter; 18. Flowmeter II; 19. Cooling water pump; 20. Three-way control valve II; 21. Heat exchanger; 22. Air source compressor; 23. Bypass valve II; 24. Electric control valve III; 25. Air source gas turbine; 26. Measurement and control flowmeter; 27. Total temperature and total pressure composite probe; 28. Deflection section. Detailed implementation manners

[0046] The following will describe in detail various exemplary embodiments, features and aspects of the present application with reference to the accompanying drawings. The same reference numerals in the drawings denote elements having the same or similar functions. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0047] The special term "exemplary" here means "serving as an example, embodiment or illustration". Any embodiment described as "exemplary" here is not necessarily to be construed as superior to or better than other embodiments.

[0048] In addition, in order to better illustrate the present application, numerous specific details are given in the following detailed embodiments. Those skilled in the art should understand that the present application can be implemented without some specific details. In some instances, methods, means, and elements well known to those skilled in the art are not described in detail so as to highlight the gist of the present application.

[0049] The present invention provides an intercooler test device and method for an intercooled cycle gas turbine. The test device includes a water supply system, a gas supply system, and a measurement and control system. The water supply system includes a makeup water circuit, a heat exchange circuit, and a cooling circuit that are interconnected;

[0050] The makeup water circuit includes: a makeup water tank 1. The makeup water tank 1 is hermetically connected to a circulation water tank 7 in the heat exchange circuit through a makeup water pipeline. An electric control valve 1 2, an electric control valve 2 4, a manual shut-off valve 1 5, and a manual shut-off valve 2 6 for regulating the flow rate are correspondingly arranged on the makeup water pipeline. A makeup water pump 3 with a communication pipeline is erected between the makeup water pipelines;

[0051] The heat exchange circuit further includes: a heat exchange pipeline for hermetically connecting an intercooler test piece 12 and the circulation water tank 7. An electric shut-off valve 8 for regulating the flow rate and a relief valve 9 for discharging are installed on the heat exchange pipeline. A bypass valve 1 11 is erected between the heat exchange pipelines. A circulation water pump 15 and a flowmeter 10 are installed on the heat exchange pipeline from the circulation water tank 7 to the intercooler test piece 12 to achieve unidirectional flow. And the heat exchange pipeline is hermetically connected to a heat exchanger 21 in the cooling circuit. A three-way control valve 1 14 and a discharge valve 13 are installed on the heat exchange pipeline;

[0052] The cooling circuit further includes: a mixing water tank 16 for cooling water to enter. The mixing water tank 16 is connected to the heat exchanger 21 through a cooling pipeline. A filter 17, a flowmeter 2 18, and a cooling water pump 19 are sequentially installed on the cooling pipeline between the mixing water tank 16 and the heat exchanger 21. And a three-way control valve 2 20 is installed on the cooling pipeline.

[0053] The gas supply system includes: a gas supply pipeline connected to the atmospheric environment. The gas supply pipeline is connected to the intercooler test piece 12. An auxiliary gas supply pipeline is erected on the gas supply pipeline. A bypass valve 2 23 is installed on the auxiliary gas supply pipeline. And an electric control valve 3 24, a gas source gas turbine 25, and a gas source compressor 22 are correspondingly installed at the front and rear ends of the gas supply pipeline.

[0054] The measurement and control system includes: a measurement and control flowmeter 26 arranged on the gas supply pipeline. The measurement and control flowmeter 26 is close to the intercooler test piece 12. A total temperature and total pressure compliance probe 27, a pressure sensor, and a temperature sensor are installed on the gas supply pipeline on both sides of the intercooler test piece 12.

[0055] Embodiment 1. The present invention provides an intercooled cycle gas turbine intercooler test method applied to the above device. When the method is used for intercooler testing, it includes the following operations:

[0056] Step 1: First, install the intercooler test piece 12, connect the water supply system and the air supply system pipelines to the test piece, and reasonably design the air inlet turning section 28 of the intercooler and the air supply pipeline according to the number of intercoolers to be tested, so as to ensure the uniformity of the air supply of the test piece and form the whole system into a closed loop;

[0057] Step 2: Start the water supply system. Before starting the water supply system, water should be replenished first. When replenishing water, you need to open the electric regulating valve 1 2 and the electric regulating valve 2 4 of the water replenishment circuit, close the manual stop valve 1 5 and the manual stop valve 2 6, open the ventilation valve on the top of the circulating water tank 7, close the electric stop valve 8 of the heat exchange circuit, start the water replenishment pump 3, and replenish fresh water from the water replenishment tank 1 to the circulating water tank 7. Determine whether to stop the water supply based on the feedback display of the liquid level gauge on the circulating water tank 7;

[0058] Step 3: After filling the circulating water tank 7 with fresh water, close the electric regulating valve 1 2 and the electric regulating valve 2 4 of the water replenishment circuit, open the electric stop valve 8 of the heat exchange circuit, close the bypass valve 1 11, start the circulating water pump 15, and pump the fresh water in the circulating water tank 7 to various places in the heat exchange circuit. After the circulating water tank 7 is basically emptied, fill the circulating water tank 7 with fresh water again according to the water replenishment operation, and then pump the fresh water in the circulating water tank 7 to various places in the heat exchange circuit until the entire heat exchange circuit is filled with fresh water. At this time, close the ventilation valve on the top of the circulating water tank 7 to form a closed heat exchange circuit, open the electric stop valves 8 at various places in the heat exchange circuit in turn to ensure that the circuit is unobstructed, start the circulating water pump 15, and after the system is stable, read the fresh water flow in the heat exchange circuit through the flowmeter 10 to complete the startup of the heat exchange circuit;

[0059] Step 4: Turn on the cooling water pump 19 of the cooling circuit, suck in cooling water and pass it through the filter 17 into the heat exchanger 21 to cool the fresh water flowing out of the intercooler test piece 12. The cooling water flow is read by the flow meter 18. The fresh water is recycled after being reduced to a certain temperature. The cooling water flows through the heat exchanger 21 and then passes through the three-way regulating valve 20. By adjusting the opening of the three-way regulating valve 20, part of the cooling water flows back to the mixing water tank 16 to mix with the cooling water that has not been heat exchanged. The rest of the cooling water is completely discharged. At this point, the normal startup and operation of the water supply system is completed;

[0060] Step 5: Connect the temperature sensors, pressure sensors, total temperature and total pressure composite probe 27, flow meter 10, electric regulating valve, etc. of the test device to the measurement and control system, turn on the measurement and control system, and ensure that the parameters at each location are read normally. The performance of the intercooler is mainly characterized by the parameter of intercooling degree, as shown in the following formula. The measurement and control system can provide the parameters of the intercooler test piece 12, such as intercooling degree and pressure loss, in real time through online data collection and analysis;

[0061]

[0062] Wherein, T3 is the inlet temperature of the air side of the intercooler test piece 12, T5 is the outlet temperature of the air side of the intercooler test piece 12, and T1 is the inlet temperature of the fresh water side of the intercooler test piece 12;

[0063] Step Six: Operate the gas source gas turbine 25 to drive the gas source compressor 22 to work. By adjusting the output speed of the gas source gas turbine 25, make the outlet parameters of the gas source compressor 22 close to the inlet parameters of the gas side of the actual gas turbine intercooler, so as to improve the accuracy of the performance verification of the intercooler test piece 12;

[0064] Step Seven: When the water supply, gas supply and test system are ready, start the performance test of the intercooler test piece 12 at multiple operating points. The bypass valve II 23 and the electric control valve III 24 can change the air pressure and flow rate entering the intercooler test piece 12 while the operating conditions of the gas source compressor 22 remain unchanged. First, fully open the bypass valve II 23, and sequentially open the electric control valve III 24 from 20% to 100% at intervals of 10% to explore the performance of the intercooler under different conditions of the inlet air pressure on the gas side; after the electric control valve III 24 is opened to 100%, sequentially reduce the opening of the bypass valve II 23 at intervals of 10% until it is completely closed, so as to explore the performance of the intercooler under different conditions of the inlet air flow rate on the gas side.

[0065] Example Two, the method also includes the following operations under different usage conditions of the intercooler:

[0066] Use the reduced flow rate or Mach number of the inlet air of the intercooler as the independent variable to obtain the variation law of the performance parameters of the intercooler, and obtain the variation relationship between the intercooler and the total pressure loss with the reduced flow rate of the inlet air of the intercooler. For intercoolers under different usage conditions, by keeping the reduced flow rate consistent, evaluate the heat transfer performance and resistance characteristics of the intercooler, and provide a reference basis for the design of the intercooled cycle gas turbine.

[0067] The method for the performance test of the intercooler test piece 12 at multiple operating points also includes the following operations:

[0068] The performance test of the intercooler test piece 12 at multiple operating points can be carried out under the condition of unchanged intake conditions. The bypass valve II 23 and the electric control valve III 24 in the gas supply system can change the air pressure and flow rate entering the intercooler test piece 12;

[0069] Fully open the bypass valve II 23, and open the electric control valve III 24 in sequence from 20% to 100% at intervals of 10% to explore the performance of the intercooler under different air-side inlet pressures. After the electric control valve III 24 is opened to 100%, reduce the opening of the bypass valve II 23 in sequence at intervals of 10% until it is completely closed, so as to explore the performance of the intercooler under different air-side inlet flows. After the electric control valve III 24 is opened to 100%, reduce the opening of the bypass valve II 23 in sequence at intervals of 10% until it is completely closed, so as to explore the performance of the intercooler under different air-side inlet flows.

[0070] The method for performance testing of the intercooler test piece 12 under different fresh water flows in the heat exchange loop also includes any one of the following two operations:

[0071] Adjust the fresh water flow by adjusting the working frequency of the circulating water pump 15;

[0072] Without changing the working frequency of the circulating water pump 15, change the fresh water flow into the intercooler test piece 12 by adjusting the bypass valve I 11.

[0073] Through the above two measures, a large range of adjustment of the fresh water flow in the heat exchange loop can be achieved.

[0074] Example 3, the performance test of the intercooler test piece 12 under different fresh water temperatures in the heat exchange loop includes the following operations:

[0075] By adjusting the opening of the three-way control valve I 14 in the fresh water pipeline before the heat exchanger 21, part of the fresh water is directly returned to the circulation water tank 7, and part of the fresh water enters the heat exchanger 21 for cooling. The two-way fresh water is finally mixed in the circulation water tank 7, so as to adjust the fresh water outlet temperature of the circulation water tank 7. In the cooling loop, a three-way control valve II 20 is set at the cooling water side outlet of the heat exchanger 21. By adjusting the opening of this valve, part of the cooled cooling water is directly discharged, and part of the cooling water returns to the mixing water tank 16 to be mixed with the uncooled cooling water, so as to adjust the cooling water outlet temperature of the mixing water tank 16.

[0076] In some embodiments, in order to meet the test requirements of the heat transfer characteristics and flow channel resistance characteristics of single, multiple and full-size intercoolers, according to the number of the tested intercoolers, the air intake turning section 28 of the intercooler and the air supply pipeline is reasonably designed to ensure the uniformity of the air supply to the test piece.

[0077] In some embodiments, the present application can not only complete the heat transfer characteristic test of the intercooler with a core, but also conduct the resistance characteristic test of the intercooler housing. When conducting the resistance characteristic test of the intercooler housing, only the intercooler housing is installed. At this time, there is no need to operate the water supply system. The water supply and return interfaces of the intercooler housing are blocked, and only the intake and exhaust pipelines are connected. Through the total temperature and total pressure composite probe on the intercooler housing, the total pressure at different positions of the intercooler housing can be measured respectively, and the total pressure loss coefficient under different parameters of the intercooler housing can be obtained, providing a basis for the flow channel design of the intercooler.

[0078] Embodiment 4, when the method is used for the intercooler test, the measurement and control system includes the following operations:

[0079] Through on-line data acquisition and analysis, parameters such as the intercooling degree and pressure loss of the intercooler test piece 12 can be provided in real time, and the variation relationships of the intercooling degree, pressure loss, etc. with the reduced flow rate or Mach number of the air inlet can be obtained.

[0080] In some embodiments, not only can the heat transfer characteristic test of the intercooler with a core be completed, but also the resistance characteristic test of the intercooler housing can be conducted. When conducting the resistance characteristic test of the intercooler housing, only the intercooler housing is installed. At this time, there is no need to operate the water supply system. The water supply and return interfaces of the intercooler housing are blocked, and only the intake and exhaust pipelines are connected. After connecting the measurement and control system, start the gas source gas turbine 25 to start supplying gas. Through the total temperature and total pressure composite probe 27 on the intercooler housing, the total pressure at different positions of the intercooler housing can be measured respectively, and the total pressure loss coefficient under different parameters of the intercooler housing can be obtained to verify the accuracy of the intercooler housing design. The total pressure loss coefficient η is shown in the following formula:

[0081]

[0082] P3 * —Total pressure at the inlet of the intercooler test piece 12;

[0083] P5 * —Total pressure at the outlet of the intercooler test piece 12.

[0084] In this embodiment, the reduced flow rate or Mach number of the inlet air of the intercooler is used as the independent variable to study the variation law of the performance parameters of the intercooler, and the variation relationships of the intercooler and the total pressure loss with the reduced flow rate of the inlet air of the intercooler are obtained. For intercoolers under different operating conditions, by keeping the reduced flow rate or Mach number consistent, the heat transfer performance and resistance characteristics of the intercooler at this time can be evaluated, providing a reference basis for the design of the intercooled cycle gas turbine. The reduced flow rate is shown in the following formula:

[0085]

[0086] q—Mass flow rate of the flowmeter 10, kg / s;

[0087] P0—Total pressure of the inlet air of the intercooler, kPa;

[0088] T0—Inlet air temperature of the intercooler, K.

[0089] In summary, the present invention can conveniently and efficiently implement the heat transfer characteristics and resistance characteristics tests on the intercooler components of an intercooled cycle gas turbine.

[0090] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An intercooler test device for an indirect cooling cycle gas turbine, characterized in that, The test device includes: a water supply system, a gas supply system, and a measurement and control system. The water supply system includes a makeup water circuit, a heat exchange circuit, and a cooling circuit that are interconnected; The makeup water circuit includes: a makeup water tank. The makeup water tank is hermetically connected to the circulation water tank in the heat exchange circuit through a makeup water pipe. An electric control valve 1, an electric control valve 2, a manual stop valve 1, and a manual stop valve 2 for regulating the flow rate are correspondingly arranged on the makeup water channel. A makeup water pump with a connecting pipe is installed between the makeup water pipes; The heat exchange circuit further includes: a heat exchange pipe for hermetically connecting an intermediate cooler test piece and the circulation water tank. An electric stop valve for regulating the flow rate and a relief valve for discharging are installed on the heat exchange pipe. A bypass valve 1 is installed between the heat exchange pipes. A circulation water pump and a flowmeter are installed on the heat exchange pipe from the circulation water tank to the intermediate cooler test piece to achieve unidirectional flow. The heat exchange pipe is hermetically connected to the heat exchanger in the cooling circuit. A three-way control valve 1 and a discharge valve are installed on the heat exchange pipe; The cooling circuit further includes: a mixing water tank for cooling water to enter. The mixing water tank is connected to the heat exchanger through a cooling pipe. A filter, a flowmeter 2, and a cooling water pump are sequentially installed on the cooling pipe between the mixing water tank and the heat exchanger. A three-way control valve 2 is installed on the cooling pipe; 2. The intercooler test device for an intercooled cycle gas turbine according to claim 1, wherein, The gas supply system includes: a gas supply pipe connected to the atmospheric environment. The gas supply pipe is connected to the intermediate cooler test piece. An auxiliary gas supply pipe is installed on the gas supply pipe. A bypass valve 2 is installed on the auxiliary gas supply pipe. An electric control valve 3, a gas source gas turbine, and a gas source compressor are correspondingly installed at the front and rear ends of the gas supply pipe; 3. An intercooler test device for an intercooled cycle gas turbine according to claim 1, characterized in that, The measurement and control system includes: a measurement and control flowmeter arranged on the gas supply pipe. The measurement and control flowmeter is close to the intermediate cooler test piece. A total temperature and total pressure compliance probe, a pressure sensor, and a temperature sensor are installed on the gas supply pipes on both sides of the intermediate cooler test piece; 4. A method for testing an intercooler of an intercooled cycle gas turbine, which is applied to the intercooler test device of the intercooled cycle gas turbine according to any one of claims 1-3, characterized in that, When the method is used for the intermediate cooler test, it includes the following operations: Step 1: First, install the intermediate cooler test piece, connect the pipelines of the water supply system and the gas supply system to the test piece. According to the number of intermediate coolers to be tested, reasonably design the intake turning section of the intermediate cooler and the gas supply pipeline to ensure the uniformity of the gas supply to the test piece, and form a closed loop for the entire system; Step 2: Start and operate the water supply system. Before starting the water supply system, make-up water should be carried out first. When making up water, the electric control valve 1 and the electric control valve 2 of the makeup water circuit should be opened first, the manual stop valve 1 and the manual stop valve 2 should be closed, the ventilation valve at the top of the circulation water tank should be opened, the electric stop valve of the heat exchange circuit should be closed, the makeup water pump should be started, and fresh water should be replenished from the makeup water tank to the circulation water tank. Judge whether to stop the water supply according to the feedback display of the liquid level gauge on the circulation water tank; Step 3: After the circulating water tank is filled with fresh water, close the electric regulating valve 1 and the electric regulating valve 2 of the water replenishment circuit, open the electric stop valve of the heat exchange circuit, close the bypass valve 1, start the circulating water pump, and pump the fresh water in the circulating water tank to various places in the heat exchange circuit. After the circulating water tank is basically emptied, fill the circulating water tank with fresh water again according to the water replenishment operation, and then pump the fresh water in the circulating water tank to various places in the heat exchange circuit until the entire heat exchange circuit is filled with fresh water. At this time, close the ventilation valve on the top of the circulating water tank to form a closed heat exchange circuit, open the electric stop valves at various places in the heat exchange circuit in turn to ensure that the circuit is unobstructed, start the circulating water pump, and read the fresh water flow of the heat exchange circuit through the flow meter after the system is stable, and complete the startup of the heat exchange circuit; Step 4: Turn on the cooling water pump of the cooling circuit, suck in cooling water and pass it through the filter into the heat exchanger to cool the fresh water flowing out of the intercooler test piece. The cooling water flow is read by flow meter 2. The fresh water is recycled after being reduced to a certain temperature. The cooling water flows through the heat exchanger and passes through three-way regulating valve 2. By adjusting the opening of three-way regulating valve 2, part of the cooling water flows back to the mixing water tank and is mixed with the unheated cooling water. The rest of the cooling water is discharged. At this point, the normal startup and operation of the water supply system is completed; Step 5: Connect the temperature sensors, pressure sensors, total temperature and total pressure composite probes, flow meters, electric control valves, etc. at various locations of the test device to the measurement and control system, turn on the measurement and control system, and ensure that the parameters at various locations are read normally. The performance of the intercooler is mainly characterized by the parameter of intercooling degree, as shown in the following formula. The measurement and control system can provide parameters such as intercooling degree and pressure loss of the intercooler test piece in real time through online data acquisition and analysis; Where, T3 is the inlet temperature of the intercooler test piece on the air side, T5 is the outlet temperature of the intercooler test piece on the air side, and T1 is the inlet temperature of the fresh water side of the intercooler test piece. Step 6: Run the gas source gas turbine to drive the gas source compressor to work. By adjusting the output speed of the gas source gas turbine, the gas source compressor outlet parameters are made close to the gas turbine intercooler air side inlet parameters, thereby improving the accuracy of the intercooler test piece performance verification; Step seven: After the water supply, air supply and test system preparations are completed, start the performance test of the intercooler test piece at multiple operating points. Bypass valve two and electric control valve three can change the air pressure and flow entering the intercooler test piece while the operating conditions of the air source compressor remain unchanged. First, open all bypass valves two and open electric control valve three from % to % in intervals of % to explore the performance of the intercooler under different air side inlet pressures. When electric control valve three is opened to %, reduce the opening of bypass valve two in intervals of % until it is completely closed to explore the performance of the intercooler under different air side inlet flow rates.

5. The intercooler test method for an indirect air-cooled gas turbine according to claim 4, wherein, The method further comprises the following operations under different use conditions of the intercooler: Using the reduced flow rate or Mach number of the inlet air of the intercooler as the independent variable, the variation law of the performance parameters of the intercooler is obtained, and the relationship between the intercooler and the total pressure loss with the change of the reduced flow rate of the inlet air of the intercooler is obtained. For intercoolers under different operating conditions, by keeping the reduced flow rate consistent, the heat transfer performance and resistance characteristics of the intercooler are evaluated, providing a reference basis for the design of intercooled cycle gas turbines.

6. The intercooler test method for an indirectly cooled gas turbine according to claim 4, characterized in that, The method for performance testing of the intercooler test piece at multiple operating points further includes the following operations: Fully open the bypass valve II, and open the electric control valve III from 20% to 100% in intervals of 10% in turn to explore the performance of the intercooler under different conditions of the air-side inlet pressure. After the electric control valve III is opened to 100%, reduce the opening of the bypass valve II in intervals of 10% in turn until it is completely closed to explore the performance of the intercooler under different conditions of the air-side inlet flow rate. After the electric control valve III is opened to 100%, reduce the opening of the bypass valve II in intervals of 10% in turn until it is completely closed to explore the performance of the intercooler under different conditions of the air-side inlet flow rate.

7. The intercooler test method for an indirectly cooled gas turbine according to claim 4, characterized in that The method for performance testing of the intercooler test piece under different fresh water flow rates in the heat exchange circuit further includes any one of the following two operations: Adjust the fresh water flow rate by adjusting the operating frequency of the circulating water pump; Without changing the operating frequency of the circulating water pump, change the fresh water flow rate flowing into the intercooler test piece by adjusting the bypass valve I.

8. The intercooler test method for an indirectly cooled gas turbine according to claim 4, characterized in that The performance testing of the intercooler test piece at different fresh water temperatures in the heat exchange circuit includes the following operations: By adjusting the opening of the three-way control valve I in the fresh water pipeline in front of the heat exchanger, part of the fresh water directly returns to the circulation water tank, and part of the fresh water enters the heat exchanger for cooling. The two-way fresh water finally mixes in the circulation water tank, thereby adjusting the outlet temperature of the fresh water in the circulation water tank. In the cooling circuit, a three-way control valve II is arranged at the outlet of the cooling water side of the heat exchanger. By adjusting the opening of this valve, part of the cooled cooling water is directly discharged, and part of the cooling water returns to the mixing tank to be mixed with the uncooled cooling water, thereby adjusting the outlet temperature of the cooling water in the mixing tank.

9. The intercooler test method for an indirect air-cooled gas turbine according to claim 4, wherein When the method is used for the intercooler test, the measurement and control system includes the following operations: Through on-line data acquisition and analysis, parameters such as the intercooling degree and pressure loss of the intercooler test piece can be provided in real time, and the relationship between the intercooling degree, pressure loss, etc. and the reduced flow rate or Mach number of the air inlet can be obtained.

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