Variable power turbine expansion generator performance test system and method

Abstract

The invention discloses a variable power turbine expansion generator performance test system and method, and relates to the field of generator set performance test.The variable power turbine expansion generator performance test system comprises a test system body, and the test system body comprises an expansion machine, a brake supercharger, a nitrogen supplement part, a gas supply pipe, an exhaust pipe, two monitoring systems, two adjusting valves, a sealing gas assembly and an oil supply assembly; the brake booster is located on one side of the expansion machine in the length direction, a coupler is arranged between the expansion machine and the brake booster, the two ends of the coupler are connected with the expansion machine and the brake booster respectively, the gas supply pipe is located between the nitrogen supplementing piece and the expansion machine, and the two ends of the gas supply pipe are detachably connected with the nitrogen supplementing piece and the expansion machine respectively. The gas supply pipe is detachably connected with the expansion machine, the exhaust pipe is detachably connected with the expansion machine, the two monitoring systems are connected with the gas supply pipe and the exhaust pipe respectively, the monitoring systems are used for monitoring gas in the gas supply pipe and the exhaust pipe, and the two adjusting valves are communicated with the gas supply pipe and the exhaust pipe respectively. The method has the effect of improving the energy utilization rate.

Description

Technical Field

[0001] This application relates to the field of generator set performance testing, and in particular to a performance testing system and method for a variable power turbine expansion generator. Background Technology

[0002] Currently, the turbine expander is the core equipment of the cryogenic purification system, and its operating performance directly determines the energy utilization efficiency and operational stability of the entire process.

[0003] In existing technologies, traditional constant-condition testing modes cannot accurately simulate the real performance of equipment under varying load and speed conditions. Most of the turbine expander generator performance testing systems commonly used in the industry are designed based on fixed power and fixed speed operating modes. Existing testing systems usually rely on mechanical braking devices or high-power resistive loads to achieve power regulation. This regulation method not only has a complex system structure and slow response speed, but also causes a lot of energy waste, significantly reducing the economic efficiency of the testing process.

[0004] In response to the aforementioned technologies, there is an urgent need for a performance testing system for variable power turbine expander generators to improve energy utilization. Summary of the Invention

[0005] To improve energy utilization, this application provides a performance testing system and method for a variable power turbine expander generator.

[0006] In a first aspect, this application provides a performance testing system for a variable power turbine expander generator, employing the following technical solution: A performance testing system for a variable-power turbo expander generator includes a test system body. The test system body comprises an expander, a brake booster, a nitrogen replenishment unit, a gas supply pipe, an exhaust pipe, two monitoring systems, two regulating valves, a sealing gas assembly, and a fuel supply assembly. The brake booster is located on one side of the expander along its length. A coupling is provided between the expander and the brake booster, with both ends of the coupling connected to the expander and the brake booster, respectively. The gas supply pipe is located between the nitrogen replenishment unit and the expander, with both ends connected to nitrogen gas supply pipes. The supplementary component and expander are detachably connected, as is the exhaust pipe. Two monitoring systems are connected to the air supply pipe and exhaust pipe respectively, and are used to monitor the gas in the air supply pipe and exhaust pipe. Two regulating valves are connected to the air supply pipe and exhaust pipe respectively. A sealing gas assembly is connected to the connection between the air supply pipe and the expander, and is used to reduce nitrogen leakage. An oil supply assembly is connected to the coupling, and is used to reduce wear on the coupling. A flow meter is connected to the air supply pipe, and the flow meter is located between the regulating valve and the nitrogen supplementary component.

[0007] By adopting the above technical solution, at the start of the test, the nitrogen replenishment unit supplies nitrogen into the supply pipe. The flow meter reads and displays the flow rate of nitrogen in the supply pipe and transmits it to the terminal. The nitrogen in the supply pipe enters the expander, driving the impeller inside the expander to rotate. The expander and the coupling work together to drive the brake booster. The nitrogen in the expander is discharged through the exhaust pipe. The monitoring system reads the temperature and pressure of nitrogen in the supply pipe and exhaust pipe and transmits the data to the terminal. The sealing gas is used to reduce the probability of nitrogen leakage at the connection between the supply pipe and the expander. The oil supply assembly is used to reduce the wear of the coupling. When it is necessary to adjust the power of the brake booster, the two regulating valves are adjusted to adjust the flow rate of nitrogen in the supply pipe to the preset value, so that the flow rate of nitrogen in the supply pipe changes, thereby indirectly adjusting the power of the brake booster. The brake booster transmits the power change to the terminal. This test system can flexibly adjust the power of the brake booster. When the power changes, the flow rate of nitrogen in the supply pipe is adjusted in real time, reducing nitrogen waste and improving energy utilization.

[0008] Optionally, the nitrogen replenishment component includes a buffer tank and an inlet pipe. The end of the supply pipe away from the expander is connected to the nitrogen pipeline network, one end of the inlet pipe is connected to the supply pipe, one side of the buffer tank is connected to the nitrogen pipeline network, and the other side of the buffer tank is connected to the inlet pipe.

[0009] By adopting the above technical solution, during normal operation, the buffer tank stores nitrogen, and the nitrogen pipeline delivers nitrogen to the expander through the gas supply pipe. When the nitrogen pipeline fails, the nitrogen in the buffer tank is delivered to the gas supply pipe through the gas inlet pipe, so that the test system has a sufficient nitrogen supply source and improves the continuity of the test system's operation.

[0010] Optionally, a pressure reducing valve and a filter are provided on the side of the gas supply pipe closest to the nitrogen network, with the pressure reducing valve located between the filter and the gas inlet pipe.

[0011] By adopting the above technical solution, the filter removes impurities from the nitrogen gas, the pressure reducing valve controls the pressure of the nitrogen gas in the gas supply pipe, and different pressures are applied according to different power levels, thus improving the convenience of power adjustment.

[0012] Optionally, the monitoring system includes a temperature measuring instrument and a pressure measuring instrument, both of which are connected to the air supply pipe and the exhaust pipe. The temperature measuring instrument is located between the pressure measuring instrument and the expander.

[0013] By adopting the above technical solution, the temperature measuring instrument and the pressure measuring instrument measure the pressure and temperature of nitrogen in the gas supply pipe and the exhaust pipe, respectively, and transmit the data to the terminal, thereby improving the convenience of nitrogen data detection.

[0014] Optionally, an anti-surge valve is provided between the air supply pipe and the exhaust pipe, with both ends of the anti-surge valve connected to the air supply pipe and the exhaust pipe, respectively.

[0015] By adopting the above technical solution, when the flow rate of nitrogen in the gas supply pipe is low, the anti-surge valve opens, and the nitrogen in the exhaust pipe flows back into the gas supply pipe, thereby increasing the flow rate of nitrogen in the gas supply pipe, thus getting out of the surge limit and improving the stability of the test system.

[0016] Optionally, the sealing gas assembly includes a sealing gas system, a gas supply pipe, and a gas storage tank. The gas supply pipe is located between the gas storage tank and the expander, with its two ends connected to the gas storage tank and the expander, respectively. The sealing gas system is located between the gas storage tank and the expander and is connected to the gas supply pipe.

[0017] By adopting the above technical solution, the gas in the gas storage tank is transported to the sealing gas system through the gas delivery pipe. The sealing gas system regulates the gas pressure and delivers it to the connection between the expander and the gas supply pipe through the gas delivery pipe. This allows the gas to wrap around the connection between the expander and the gas supply pipe, reducing the probability of nitrogen leakage in the gas supply pipe. At the same time, it reduces the probability of external moisture and dust entering the expander, thus improving the stability of the expander's operation.

[0018] Optionally, the oil supply assembly includes an oil station, an oil delivery pipe, a water inlet pipe, a drain pipe, and a water supply component. The oil delivery pipe is located between the oil station and the coupling, with both ends connected to the oil station and the coupling, respectively. The water supply component is located on the side of the oil station away from the expander. Both the water inlet pipe and the drain pipe are located between the water supply component and the oil station. Both ends of the water inlet pipe are connected to the oil station and the water supply component, and both ends of the drain pipe are connected to the oil station and the water supply component.

[0019] By adopting the above technical solution, the water supply unit delivers cooling water to the oil station through the inlet pipe. The cooling water cools the oil station. The water in the oil station flows back to the water supply unit through the drain pipe, thus forming a water supply circulation path. The oil station delivers lubricating oil to the coupling through the oil delivery pipe, reducing the friction and wear of the coupling and cooling the coupling. The lubricating oil reduces the vibration of the coupling caused by dryness, thus improving the stability of the brake booster.

[0020] Secondly, this application provides a performance testing method for a variable power turbine expander generator, comprising the following steps: S1: Connect the expander to the air supply pipe and exhaust pipe; S2: Open the regulating valve to allow nitrogen to enter the expander and drive the expander to run; S3: Connect the expander to the brake booster via a coupling; S4: The flow rate of nitrogen is controlled by regulating the valve, thereby adjusting the power of the brake booster; S5: Measure the operating parameters of the expander under different working conditions; S6: Evaluate the performance indicators of the expander under different operating conditions; S7: Drives the expander to run continuously under different working conditions and performs mechanical performance testing.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. At the start of the test, the nitrogen replenishment unit supplies nitrogen into the supply pipe. The flow meter reads and displays the flow rate of nitrogen in the supply pipe and transmits it to the terminal. The nitrogen in the supply pipe enters the expander, which drives the impeller inside the expander to rotate. The expander and the coupling work together to drive the brake booster. The nitrogen in the expander is discharged through the exhaust pipe. The monitoring system reads the temperature and pressure of nitrogen in the supply pipe and the exhaust pipe and transmits the data to the terminal. The sealing gas is used to reduce the probability of nitrogen leakage at the connection between the supply pipe and the expander. The oil supply assembly is used to reduce the wear of the coupling. When it is necessary to adjust the power of the brake booster, the two regulating valves are adjusted to adjust the flow rate of nitrogen in the supply pipe to the preset value, so that the flow rate of nitrogen in the supply pipe changes, thereby indirectly adjusting the power of the brake booster. The brake booster transmits the power change to the terminal. This test system can flexibly adjust the power of the brake booster. When the power changes, the flow rate of nitrogen in the supply pipe is adjusted in real time, reducing nitrogen waste and improving energy utilization. 2. When the flow rate of nitrogen in the gas supply pipe is low, the anti-surge valve opens, returning the nitrogen in the exhaust pipe to the gas supply pipe, thereby increasing the flow rate of nitrogen in the gas supply pipe, thus breaking away from the surge limit and improving the stability of the test system. 3. The gas in the storage tank is delivered to the sealing gas system through the gas delivery pipe. The sealing gas system regulates the gas pressure and delivers it to the connection between the expander and the gas supply pipe through the gas delivery pipe. This allows the gas to enclose the connection between the expander and the gas supply pipe, reducing the probability of nitrogen leakage from the gas supply pipe. At the same time, it reduces the probability of external moisture and dust entering the expander, thus improving the stability of the expander's operation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of a performance testing system for a variable power turboexpansion generator.

[0023] Explanation of reference numerals in the attached drawings: 1. Test system body; 11. Expander; 12. Brake booster; 121. Coupling; 13. Nitrogen replenishment component; 131. Inlet pipe; 132. Buffer tank; 133. Pressure reducing valve; 134. Filter; 135. Nitrogen pipeline network; 14. Gas supply pipe; 141. Flow meter; 15. Exhaust pipe; 151. Anti-surge valve; 16. Monitoring system; 161. Temperature measuring instrument; 162. Pressure measuring instrument; 17. Regulating valve; 18. Sealing gas assembly; 181. Sealing gas system; 182. Gas delivery pipe; 183. Gas storage tank; 19. Oil supply assembly; 191. Oil station; 192. Oil delivery pipe; 193. Water inlet pipe; 194. Drain pipe; 195. Water supply component. Detailed Implementation

[0024] The present application will be further described in detail below with reference to all the accompanying drawings.

[0025] This application discloses a performance testing system for a variable power turbine expander generator. Example

[0026] Reference Figure 1 A performance testing system for a variable power turbine expander generator includes a test system body 1. The test system body 1 includes an expander 11, a brake booster 12, a nitrogen replenishment component 13, a gas supply pipe 14, and an exhaust pipe 15. The gas supply pipe 14 is located between the nitrogen replenishment component 13 and the expander 11. Both ends of the gas supply pipe 14 are detachably connected to the nitrogen replenishment component 13 and the expander 11, respectively. The nitrogen replenishment component 13 delivers nitrogen to the expander 11 through the gas supply pipe 14, and the nitrogen drives the impeller inside the expander 11 to rotate.

[0027] Reference Figure 1 The brake booster 12 is located on one side of the expander 11 along its length. A coupling 121 is provided between the expander 11 and the brake booster 12. The two ends of the coupling 121 along its length are connected to the expander 11 and the brake booster 12, respectively. The expander 11 and the coupling 121 cooperate to drive the brake booster 12. The exhaust pipe 15 is detachably connected to the expander 11, and the nitrogen gas in the expander 11 is discharged through the exhaust pipe 15. The gas supply pipe 14 is connected to a flow meter 141, which reads and displays the flow rate of nitrogen gas in the gas supply pipe 14 and transmits the data to the terminal.

[0028] Reference Figure 1The nitrogen replenishment component 13 includes a buffer tank 132 and an inlet pipe 131. The end of the supply pipe 14 away from the expander 11 is connected to the nitrogen pipeline network 135. Under normal operation, the nitrogen pipeline network 135 supplies nitrogen to the expander 11 through the supply pipe 14. One end of the inlet pipe 131 is connected to the supply pipe 14. One side of the buffer tank 132 is connected to the nitrogen pipeline network 135, and the other side of the buffer tank 132 is connected to the inlet pipe 131. Under normal conditions, the buffer tank 132 stores nitrogen. When the nitrogen pipeline network 135 fails, the nitrogen in the buffer tank 132 is transported to the supply pipe 14 through the inlet pipe 131, ensuring that the testing system has a sufficient nitrogen supply and improving the continuity of the testing system's operation.

[0029] Reference Figure 1 A pressure reducing valve 133 and a filter 134 are provided on the side of the gas supply pipe 14 near the nitrogen pipeline network 135. Both the pressure reducing valve 133 and the filter 134 are located on the side of the air inlet pipe 131 near the nitrogen pipeline network 135. The pressure reducing valve 133 is located between the filter 134 and the air inlet pipe 131. The filter 134 filters impurities in the nitrogen. The pressure reducing valve 133 controls the pressure of the nitrogen in the gas supply pipe 14 and provides different nitrogen pressures according to different power levels, thus improving the convenience of power adjustment.

[0030] Reference Figure 1 The test system body 1 also includes two monitoring systems 16, two regulating valves 17, a sealing gas assembly 18, and an oil supply assembly 19. The two monitoring systems 16 are connected to the air supply pipe 14 and the exhaust pipe 15, respectively. The two regulating valves 17 are connected to the air supply pipe 14 and the exhaust pipe 15, respectively. The regulating valves 17 are located on the side of the monitoring system 16 away from the expander 11. The monitoring system 16 reads the temperature and pressure of nitrogen in the air supply pipe 14 and the exhaust pipe 15 and transmits the data to the terminal. When it is necessary to adjust the power of the brake booster 12, the two regulating valves 17 are adjusted to adjust the flow rate of nitrogen in the air supply pipe 14 to a preset value, thereby changing the flow rate of nitrogen in the air supply pipe 14 and indirectly adjusting the power of the brake booster 12. The brake booster 12 transmits the power change to the terminal.

[0031] Reference Figure 1 The monitoring system 16 includes a temperature measuring instrument 161 and a pressure measuring instrument 162. Both the temperature measuring instrument 161 and the pressure measuring instrument 162 are connected to the gas supply pipe 14 and the exhaust pipe 15. The temperature measuring instrument 161 is located between the pressure measuring instrument 162 and the expander 11. The temperature measuring instrument 161 and the pressure measuring instrument 162 measure the pressure and temperature of the nitrogen in the gas supply pipe 14 and the exhaust pipe 15, respectively, and transmit the data to the terminal.

[0032] Reference Figure 1The sealing gas assembly 18 is connected to the connection between the gas supply pipe 14 and the expander 11. The sealing gas assembly 18 is used to reduce nitrogen leakage. The oil supply assembly 19 is connected to the coupling 121. The oil supply assembly 19 is used to reduce wear on the coupling 121. The sealing gas assembly 18 includes a sealing gas system 181, a gas supply pipe 182, and a gas storage tank 183. The gas supply pipe 182 is located between the gas storage tank 183 and the expander 11, with its two ends connected to the gas storage tank 183 and the expander 11, respectively. The sealing gas system 181 is located between the gas storage tank 183 and the expander 11 and is connected to the gas supply pipe 182. Gas in the gas storage tank 183 is supplied to the sealing gas system 181 through the gas supply pipe 182. The sealing gas system 181 regulates the gas pressure and supplies it to the connection between the expander 11 and the gas supply pipe 14 through the gas supply pipe 182. This allows the gas to envelop the connection between the expander 11 and the gas supply pipe 14, reducing the probability of nitrogen leakage in the gas supply pipe 14 and also reducing the probability of external moisture and dust entering the expander 11, thereby improving the operational stability of the expander 11.

[0033] Reference Figure 1 The oil supply assembly 19 includes an oil station 191, an oil delivery pipe 192, a water inlet pipe 193, a drain pipe 194, and a water supply component 195. The oil delivery pipe 192 is located between the oil station 191 and the coupling 121. Both ends of the oil delivery pipe 192 are connected to the oil station 191 and the coupling 121, respectively. The oil station delivers lubricating oil to the coupling 121 through the oil delivery pipe 192, reducing the friction and wear of the coupling 121 and cooling the coupling 121. The lubricating oil reduces the vibration of the coupling 121 caused by dryness, thereby improving the stability of the brake booster 12.

[0034] Reference Figure 1 The water supply component 195 is located on the side of the oil station 191 away from the expander 11. The inlet pipe 193 and the drain pipe 194 are both located between the water supply component 195 and the oil station 191. The two ends of the inlet pipe 193 are connected to the oil station 191 and the water supply component 195. The two ends of the drain pipe 194 are connected to the oil station 191 and the water supply component 195. The water supply component 195 delivers cooling water to the oil station 191 through the inlet pipe 193. The cooling water cools the oil station 191. The water in the oil station 191 flows to the water supply component 195 through the drain pipe 194, thus forming a water supply circulation path.

[0035] Reference Figure 1 An anti-surge valve 151 is provided between the gas supply pipe 14 and the exhaust pipe 15. The two ends of the anti-surge valve 151 are connected to the gas supply pipe 14 and the exhaust pipe 15, respectively. When the flow rate of nitrogen in the gas supply pipe 14 is small, the anti-surge valve 151 opens, and the nitrogen in the exhaust pipe 15 flows back to the gas supply pipe 14, thereby increasing the flow rate of nitrogen in the gas supply pipe 14, thus getting out of the surge limit and improving the stability of the test system.

[0036] The implementation principle of the variable power turbo expander generator performance testing system in this application embodiment is as follows: At the start of the test, the nitrogen replenishment component 13 supplies nitrogen into the gas supply pipe 14. The nitrogen in the gas supply pipe 14 enters the expander 11, and the nitrogen drives the impeller inside the expander 11 to rotate. The expander 11 and the coupling 121 work together to drive the brake booster 12 to work. The nitrogen in the expander 11 is discharged through the exhaust pipe 15. The temperature measuring instrument 161 and the pressure measuring instrument 162 read the temperature and pressure of the nitrogen in the gas supply pipe 14 and the exhaust pipe 15, and transmit the data to the terminal. When it is necessary to adjust the power of the brake booster 12, the two regulating valves 17 are adjusted to adjust the flow rate of nitrogen in the gas supply pipe 14 to a preset value, so that the flow rate of nitrogen in the gas supply pipe 14 changes, thereby indirectly adjusting the power of the brake booster 12. When the power changes, the flow rate of nitrogen in the gas supply pipe 14 is adjusted in real time, which reduces nitrogen waste and improves energy utilization.

[0037] This application also discloses a performance testing method for a variable power turbine expander generator, including the following steps: S1: Connect the expander 11 to the air supply pipe 14 and the exhaust pipe 15; S2: Open the regulating valve 17 to allow nitrogen to enter the expander 11 and drive the expander 11 to operate; S3: Connect the expander 11 to the brake booster 12 via coupling 121; S4: The flow rate of nitrogen is controlled by regulating valve 17, thereby regulating the power of brake booster 12; S5: Measure the operating parameters of expander 11 under different working conditions; S6: Evaluate the performance indicators of expander 11 under different operating conditions; S7: Drives the expander 11 to run continuously under different working conditions and perform mechanical performance testing.

[0038] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A performance testing system for a variable power turbine expander generator, comprising a testing system body (1), characterized in that: The test system body (1) includes an expander (11), a brake booster (12), a nitrogen replenishment component (13), an air supply pipe (14), an exhaust pipe (15), two sets of monitoring systems (16), two regulating valves (17), a sealing gas assembly (18), and an oil supply assembly (19). The brake booster (12) is located on one side of the expander (11) along its length. A coupling (121) is provided between the expander (11) and the brake booster (12). The two ends of the coupling (121) along its length are respectively connected to the expander (11) and the brake booster (12). The air supply pipe (14) is located between the nitrogen replenishment component (13) and the expander (11). The two ends of the air supply pipe (14) are detachably connected to the nitrogen replenishment component (13) and the expander (11), respectively. Pipe (15) is detachably connected to expander (11). Two sets of monitoring systems (16) are connected to air supply pipe (14) and exhaust pipe (15) respectively. The monitoring system (16) is used to monitor the gas in air supply pipe (14) and exhaust pipe (15). Two regulating valves (17) are connected to air supply pipe (14) and exhaust pipe (15) respectively. Sealing gas assembly (18) is connected to the connection between air supply pipe (14) and expander (11). Sealing gas assembly (18) is used to reduce nitrogen leakage. Oil supply assembly (19) is connected to coupling (121). Oil supply assembly (19) is used to reduce wear of coupling (121). Air supply pipe (14) is connected to flow meter (141). Flow meter (141) is located between regulating valve (17) and nitrogen replenishment component (13).

2. The performance testing system for a variable power turbine expander generator according to claim 1, characterized in that: The nitrogen replenishment component (13) includes a buffer tank (132) and an air inlet pipe (131). The end of the air supply pipe (14) away from the expander (11) is connected to the nitrogen pipeline network (135). One end of the air inlet pipe (131) is connected to the air supply pipe (14). One side of the buffer tank (132) is connected to the nitrogen pipeline network (135), and the other side of the buffer tank (132) is connected to the air inlet pipe (131).

3. The performance testing system for a variable power turbine expander generator according to claim 1, characterized in that: The gas supply pipe (14) is equipped with a pressure reducing valve (133) and a filter (134) on the side near the nitrogen pipeline (135). The pressure reducing valve (133) is located between the filter (134) and the gas inlet pipe (131).

4. The performance testing system for a variable power turbine expander generator according to claim 1, characterized in that: The monitoring system (16) includes a temperature measuring instrument (161) and a pressure measuring instrument (162). Both the temperature measuring instrument (161) and the pressure measuring instrument (162) are connected to the air supply pipe (14) and the exhaust pipe (15). The temperature measuring instrument (161) is located between the pressure measuring instrument (162) and the expander (11).

5. The performance testing system for a variable power turbine expander generator according to claim 1, characterized in that: An anti-surge valve (151) is provided between the air supply pipe (14) and the exhaust pipe (15), and the two ends of the anti-surge valve (151) are connected to the air supply pipe (14) and the exhaust pipe (15) respectively.

6. The performance testing system for a variable power turbine expander generator according to claim 1, characterized in that: The sealing gas assembly (18) includes a sealing gas system (181), a gas supply pipe (182), and a gas storage tank (183). The gas supply pipe (182) is located between the gas storage tank (183) and the expander (11). Both ends of the gas supply pipe (182) are connected to the gas storage tank (183) and the expander (11), respectively. The sealing gas system (181) is located between the gas storage tank (183) and the expander (11) and is connected to the gas supply pipe (182).

7. The performance testing system for a variable power turbine expander generator according to claim 1, characterized in that: The oil supply assembly (19) includes an oil station (191), an oil delivery pipe (192), a water inlet pipe (193), a drain pipe (194), and a water supply component (195). The oil delivery pipe (192) is located between the oil station (191) and the coupling (121), and both ends of the oil delivery pipe (192) are connected to the oil station (191) and the coupling (121), respectively. The water supply component (195) is located on the side of the oil station (191) away from the expander (11). The water inlet pipe (193) and the drain pipe (194) are both located between the water supply component (195) and the oil station (191). Both ends of the water inlet pipe (193) are connected to the oil station (191) and the water supply component (195), and both ends of the drain pipe (194) are connected to the oil station (191) and the water supply component (195).

8. A performance testing method for a variable-power turbine expander generator, applied to a performance testing system for a variable-power turbine expander generator as described in any one of claims 1-7, characterized in that, Includes the following steps: S1: Connect the expander (11) to the air supply pipe (14) and the exhaust pipe (15); S2: Open the regulating valve (17) to allow nitrogen to enter the expander (11) and drive the expander (11) to run; S3: Connect the expander (11) to the brake booster (12) via a coupling (121); S4: The flow rate of nitrogen is controlled by regulating valve (17), thereby adjusting the power of brake booster (12); S5: Measure the operating parameters of the expander (11) under different working conditions; S6: Evaluate the performance indicators of the expander (11) under different working conditions; S7: Drive the expander (11) to run continuously under different working conditions and perform mechanical performance testing.

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