Hydrogen energy equipment detection platform test system and method

Abstract

The invention discloses a hydrogen energy equipment detection platform test system and method, relates to the technical field of hydrogen energy detection, and aims to solve the problem that the existing civil liquid hydrogen key equipment is not provided with a perfect detection system for factory test, and the system comprises a hydrogen production module which comprises a hydrogen production unit and a hydrogen unloading unit serving as a supplementary gas source, the hydrogen production unit and the hydrogen unloading unit are both connected with the pressurization module; the pressurization module comprises a first pressurization vaporization unit for pressurizing the liquid hydrogen and converting the liquid hydrogen into a gas state and a second pressurization vaporization unit for pressurizing the liquid nitrogen and converting the liquid nitrogen into the gas state; the test module is connected with the pressurization module; comprising a plurality of test stations and is provided with a test interface; and the diffusion module is respectively connected with the hydrogen production module and the pressurization module and is used for discharging liquid hydrogen or hydrogen. The system can provide a performance test platform for civil liquid hydrogen key equipment to examine the performance and life indexes of the civil liquid hydrogen key equipment; and the safety and reliability of the equipment before delivery are verified.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen energy detection, and particularly relates to a test system and method for a hydrogen energy equipment detection platform. Background Art

[0002] Large-scale hydrogen storage and transportation is an important part of the construction of a low-carbon and clean hydrogen supply system. Liquid hydrogen is one of the ideal ways to achieve large-scale cross-regional hydrogen resource dispatching. Liquid hydrogen has a low temperature and a large amount of cold released during vaporization and temperature rise. High-pressure liquid hydrogen will form supercritical hydrogen with extremely unstable thermophysical properties during vaporization. At present, key equipment and related system equipment, components, testing and production equipment for civil liquid hydrogen lack the experience of use and detection in the liquid hydrogen temperature range, have many technical blind spots, and liquid hydrogen is a dangerous substance that is flammable, explosive and has a low temperature. It is expensive to obtain, has a high evaporation rate, and the ex-factory test cost is also extremely high.

[0003] The Chinese patent with the publication number CN219977790U discloses a performance test system for hydrogen energy equipment, including: a high and low temperature test chamber cylinder body, a temperature control unit, the temperature control unit includes a heat exchange box, a heat transfer medium circulation pump and a high and low temperature coolant tank, the heat exchanger exchanges heat with the air in the heat exchange box, a air supply unit, and the temperature of the high and low temperature test chamber cylinder body is adjusted in real time through the temperature control unit, so that the hydrogen energy equipment in the high and low temperature test chamber cylinder body is tested at different temperatures; however, this patent only involves temperature tests. Summary of the Invention

[0004] The present invention solves the problem that there is no perfect detection system for ex-factory testing of existing key equipment for civil liquid hydrogen, and proposes a test system for a hydrogen energy equipment detection platform to provide a performance test platform for key equipment for civil liquid hydrogen and evaluate its performance and life indicators; and proposes a test method for a hydrogen energy equipment detection platform to verify the safety and reliability of the equipment before leaving the factory.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: A test system for a hydrogen energy equipment detection platform, including: A hydrogen production module, including a hydrogen production unit and a hydrogen unloading unit as a supplementary gas source, both the hydrogen production unit and the hydrogen unloading unit are connected to a pressurization module; A pressurization module, including a first pressurization and vaporization unit for pressurizing liquid hydrogen and converting it into a gas state and a second pressurization and vaporization unit for pressurizing liquid nitrogen and converting it into a gas state; A test module, connected to the pressurization module; including a plurality of test stations and provided with test interfaces; A blow-off module, respectively connected to the hydrogen production module and the pressurization module, for discharging liquid hydrogen or hydrogen.

[0006] In this technical solution, the hydrogen production unit in the hydrogen production module is mainly responsible for hydrogen production. The hydrogen unloading unit in the hydrogen production module can serve as a corresponding supplementary gas source during the maintenance of the hydrogen production unit; the pressurization module mainly includes a first pressurization and vaporization unit and a second pressurization and vaporization unit, which can respectively pressurize liquid hydrogen and liquid hydrogen and convert them into gas through a vaporizer. The venting module can achieve the discharge of excess gas or liquid; the testing unit can test the key equipment of liquid hydrogen. The technical solution of the present invention can achieve the performance test of the key equipment of liquid hydrogen and verify the safety and reliability of the equipment before leaving the factory.

[0007] The present invention is further configured as: the hydrogen unloading unit includes a gas unloading column and a pressure reduction system connected to the gas unloading column, and the pressure reduction system is also respectively connected to a high-pressure hydrogen compressor and a low-pressure hydrogen storage tank.

[0008] In this technical solution, hydrogen can be supplied to the hydrogen supply liquid system after passing through the gas unloading column and the pressure reduction system. After pressure reduction, it can replace the hydrogen-related pipelines on site. After pressure reduction, it passes through the high-pressure hydrogen compressor and then enters the high-pressure hydrogen storage tank in the storage module for high-pressure hydrogen testing.

[0009] The present invention is further configured as: the low-pressure hydrogen storage tank is also connected to a hydrogen liquefaction unit, and the hydrogen liquefaction unit is respectively connected to the venting module and the pressurization module.

[0010] In this technical solution, the hydrogen liquefaction unit can liquefy hydrogen into liquid hydrogen, and can transport the liquid hydrogen into the liquid hydrogen storage tank in the storage module, and can also directly transport the liquid hydrogen to the venting module for vaporization and venting.

[0011] The present invention is further configured as: the first pressurization and vaporization unit includes a liquid hydrogen booster pump, the liquid hydrogen booster pump is connected to a high-pressure liquid hydrogen vaporizer, and the high-pressure liquid hydrogen vaporizer is connected to a high-pressure hydrogen storage tank.

[0012] In this technical solution, liquid hydrogen can be pressurized to a high pressure by the liquid hydrogen booster pump and enter the high-pressure liquid hydrogen vaporizer for vaporization and then enter the high-pressure hydrogen storage tank. The generated high-pressure hydrogen can be used for relevant hydrogen pressure tests.

[0013] The present invention is further configured as: the second pressurization and vaporization unit includes a liquid nitrogen booster pump, the rear end of the liquid nitrogen booster pump is connected to a high-pressure liquid nitrogen vaporizer, the front end of the liquid nitrogen booster pump is connected to a low-pressure liquid nitrogen vaporizer, the other end of the high-pressure liquid nitrogen vaporizer is connected to a high-pressure nitrogen storage tank, and the other end of the low-pressure liquid nitrogen vaporizer is connected to a low-pressure nitrogen storage tank.

[0014] In this technical solution, the second pressurization and vaporization unit can achieve the pressurization and vaporization of liquid nitrogen.

[0015] The present invention is further configured as follows: The relief module includes a first relief unit and a second relief unit. The first relief unit includes a low-pressure reheater, and the second relief unit includes a high-pressure reheater and a relief pipe connected to the high-pressure reheater.

[0016] In this technical solution, low-pressure liquid hydrogen can be vaporized and vented through the low-pressure reheater, and high-pressure liquid hydrogen is vented after passing through the high-pressure reheater and the relief pipe in sequence.

[0017] The present invention is further configured as follows: The several test stations of the test module are respectively a liquid hydrogen pump and vaporizer test station, a liquid hydrogen valve test station, a vibration table test station, a liquid hydrogen flowmeter test station, and a liquid hydrogen storage tank test station.

[0018] The present invention is further configured as follows: The hydrogen production unit includes an electrolytic cell, the electrolytic cell is connected to a post-treatment device, and the post-treatment device is also connected to a purification device.

[0019] In this technical solution, the hydrogen production unit can produce and purify hydrogen raw materials.

[0020] The present invention is further configured as follows: Pressure transmitters are provided in both the low-pressure hydrogen storage tank and the high-pressure hydrogen storage tank.

[0021] In this technical solution, pressure transmitters are provided in the above-mentioned storage tanks to immediately display the pressure values.

[0022] A test method for a hydrogen energy equipment detection platform is applicable to the above-mentioned hydrogen energy equipment platform test system, and includes the following steps: S1. Hydrogen supply and distribution: Evaluate the total amount of hydrogen and compare it with the total amount of hydrogen required for the test to determine whether the test requirements are met, give a judgment result, and balance the hydrogen amounts in each storage tank according to the judgment result; S2: Nitrogen supply and distribution: Evaluate the total amount of nitrogen and compare it with the total amount of nitrogen required for the test to determine whether the test requirements are met, give a judgment result, and balance the nitrogen amounts in each storage tank; S3: After the hydrogen and nitrogen supply and distribution are completed, test the hydrogen energy equipment through the test stations of the test module.

[0023] In this technical solution, the supply and distribution of hydrogen and nitrogen are carried out respectively to balance the hydrogen amounts and nitrogen amounts in each storage tank. After the balance is completed, test the hydrogen energy equipment through the liquid hydrogen pump test station, the vaporizer test station, the liquid hydrogen valve test station, the vibration table test station, and the liquid hydrogen flowmeter test station.

[0024] The present invention can bring the following beneficial effects: A test system for a hydrogen energy equipment detection platform according to the present invention provides a performance test platform for key equipment of civil liquid hydrogen, examines its performance and life indicators, and verifies the safety and reliability of the equipment before leaving the factory. According to key factors such as the specifications, models, sizes, detection test parameters, planned detection time, and existing medium inventory of the user's test equipment, media with different pressure and temperature requirements are automatically prepared to meet the test needs, improving the test efficiency, saving media, reducing costs, while reducing manual operations and improving safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 is the overall schematic diagram of a test system for a hydrogen energy equipment detection platform of the present application.

[0026] Figure 2 is a partial schematic diagram of the hydrogen production module of a test system for a hydrogen energy equipment detection platform of the present application.

[0027] Figure 3 is a partial schematic diagram of the relief module of a test system for a hydrogen energy equipment detection platform of the present application.

[0028] Figure 4 is a partial schematic diagram of the test module of a test system for a hydrogen energy equipment detection platform of the present application.

[0029] Figure 5 is a partial schematic diagram of the boosting module of a test system for a hydrogen energy equipment detection platform of the present application.

[0030] Reference Signs: 1, hydrogen production unit; 2, gas unloading column; 3, low-pressure hydrogen storage tank; 4, high-pressure hydrogen compressor; 5, liquid hydrogen storage tank; 6, liquid nitrogen storage tank; 7, liquid hydrogen booster pump; 8, liquid nitrogen booster pump; 9, high-pressure liquid nitrogen vaporizer; 10, low-pressure liquid nitrogen vaporizer; 11, low-pressure nitrogen storage tank; 12, high-pressure nitrogen storage tank; 13, liquid hydrogen vaporizer; 14, high-pressure hydrogen storage tank; 15, liquid hydrogen valve test station; 16, vibration table test station; 17, liquid hydrogen flowmeter test station; 18, liquid hydrogen pump and vaporizer test station; 19, relief pipe; 20, low-pressure recuperator; 21, high-pressure recuperator; 22, hydrogen liquefaction unit. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only the best embodiments of the present invention, only for explaining the present invention, and do not limit the protection scope of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0032] Embodiment 1 This embodiment proposes a test system for a hydrogen energy equipment detection platform, referring to Figure 1 , which mainly includes a hydrogen production module, a pressurization module, a test module, and a relief module.

[0033] For the hydrogen production module, it mainly includes a hydrogen production unit 1 and a hydrogen unloading unit for trucks. The hydrogen unloading unit for trucks can serve as a supplementary gas source during the maintenance of the hydrogen production unit 1; both the above-mentioned hydrogen production unit 1 and the hydrogen unloading unit for trucks are connected to the pressurization module.

[0034] For the pressurization module, it mainly includes a first pressurization and vaporization unit and a second pressurization and vaporization unit. Among them, the first pressurization and vaporization unit can pressurize liquid hydrogen and finally convert it into a gaseous state; the second pressurization and vaporization unit can pressurize liquid nitrogen and finally convert it into a gaseous state.

[0035] For the test module, it includes several test stations and tests the corresponding test interfaces; the test module is connected to the pressurization module.

[0036] For the relief module, it can discharge liquid hydrogen or hydrogen; the relief module is respectively connected to the above-mentioned hydrogen production module and pressurization module.

[0037] In the above technical solution, the hydrogen production unit in the hydrogen production module mainly produces hydrogen, and the hydrogen unloading unit for trucks in the hydrogen production module can serve as a corresponding supplementary gas source during the maintenance of the hydrogen production unit; the pressurization module mainly includes a first pressurization and vaporization unit and a second pressurization and vaporization unit, which can respectively pressurize liquid hydrogen and liquid hydrogen and convert them into a gaseous state through a vaporizer. The relief module can achieve the discharge of excess gas or liquid; the test unit can test the key equipment of liquid hydrogen; the technical solution of the present invention can achieve the performance test of the key equipment of liquid hydrogen and verify the safety and reliability of the equipment before leaving the factory.

[0038] In addition, it further includes a storage module and a common engineering unit. The storage module includes a low-pressure nitrogen gas storage tank 11, a high-pressure nitrogen gas storage tank 12, a low-pressure hydrogen gas storage tank 3, a high-pressure hydrogen gas storage tank 14, a liquid nitrogen storage tank 6, and a liquid hydrogen storage tank 5. The common engineering unit can provide support services for the test system.

[0039] More specifically, referring to Figure 1 and Figure 2 , the hydrogen unloading unit for trucks mainly includes a gas unloading column 2, a pressure reduction system, and a high-pressure hydrogen gas compressor 4. The pressure reduction system can be connected to the gas unloading column 2, and the pressure reduction system is also respectively connected to the high-pressure hydrogen gas compressor 4 and the low-pressure hydrogen gas storage tank 3.

[0040] In the above technical solution, hydrogen can be supplied to the hydrogen supply liquid system through the hydrogen discharge column 2 and the pressure reduction system. After pressure reduction, it can replace the hydrogen-related pipelines on site. After pressure reduction, it passes through the high-pressure hydrogen compressor 4 and then enters the high-pressure hydrogen storage tank 14 of the storage module for high-pressure hydrogen testing.

[0041] On one side of the low-pressure hydrogen storage tank 3, a hydrogen liquefaction unit 22 is also connected. The hydrogen liquefaction unit 22 can be respectively connected to the blow-off module and the boosting module.

[0042] In the above technical solution of the present invention, the hydrogen liquefaction unit 22 can liquefy hydrogen into liquid hydrogen. The hydrogen liquefaction unit 22 is connected to the liquid hydrogen storage tank 5 of the storage module and is also connected to the blow-off module. Therefore, the hydrogen liquefaction unit 22 can transport the liquid hydrogen into the liquid hydrogen storage tank 5 of the storage module and can also directly transport the liquid hydrogen to the blow-off module for vaporization and venting.

[0043] In this embodiment, the hydrogen liquefaction unit 22 mainly includes a hydrogen liquefaction cold box, a helium compressor, a helium gas regulation system, and a control cabinet. The hydrogen from the hydrogen unloading unit and the hydrogen production unit is used as the gas source, liquefied into liquid hydrogen by the hydrogen liquefaction unit 22, and then transported into the liquid hydrogen storage tank 5 of the storage module.

[0044] Reference Figure 1 and Figure 5 , the first boosting and vaporization unit mainly includes a liquid hydrogen booster pump 7 and a high-pressure liquid hydrogen vaporizer 13. The liquid hydrogen booster pump 7 is connected to the high-pressure liquid hydrogen vaporizer 13, and the high-pressure liquid hydrogen vaporizer 13 is connected to the high-pressure hydrogen storage tank 14. The high-pressure hydrogen storage tank 14 can be connected to the test module.

[0045] In the above technical solution, the liquid hydrogen can be boosted to a high pressure by the liquid hydrogen booster pump 7, enter the high-pressure liquid hydrogen vaporizer 13 for vaporization, and then enter the high-pressure hydrogen storage tank 14. The generated high-pressure hydrogen can be used for relevant hydrogen pressure tests.

[0046] The second boosting and vaporization unit mainly includes a liquid nitrogen booster pump 8, a high-pressure liquid nitrogen vaporizer 9, and a low-pressure liquid nitrogen vaporizer 10. The rear end of the liquid nitrogen booster pump 8 is connected to the high-pressure liquid nitrogen vaporizer 9, the front end of the liquid nitrogen booster pump 8 is connected to the low-pressure liquid nitrogen vaporizer 10, the other end of the high-pressure liquid nitrogen vaporizer 9 is connected to the high-pressure nitrogen storage tank 12, and the other end of the low-pressure liquid nitrogen vaporizer 10 is connected to the low-pressure nitrogen storage tank 11.

[0047] In the above technical solution, the second boosting and vaporization unit can achieve the boosting and vaporization of liquid nitrogen.

[0048] In addition, the liquid hydrogen storage tank 5 of the storage module is connected to one end of the liquid hydrogen booster pump 7, and the other end of the liquid hydrogen booster pump 7 is connected to the liquid hydrogen vaporizer 13.

[0049] The liquid nitrogen storage tank 6 of the storage module is connected to one end of the liquid nitrogen booster pump 8, and the other end of the liquid nitrogen booster pump 8 is connected to the high-pressure liquid nitrogen vaporizer 9.

[0050] For the venting module, refer to Figure 1 and Figure 3 , which mainly includes a first venting unit and a second venting unit. Among them, the first venting unit mainly includes a low-pressure recuperator 20, and the second venting unit mainly includes a high-pressure recuperator 21 and a venting pipe 19. The high-pressure recuperator 21 is connected to the venting pipe 19.

[0051] In the above technical solution, low-pressure liquid hydrogen can be vaporized and vented through the low-pressure recuperator 20, and high-pressure liquid hydrogen is vented after passing through the high-pressure recuperator 21 and the venting pipe 19 in sequence. Hydrogen is vented through the venting pipe 19; nitrogen and liquid nitrogen are vented locally.

[0052] Refer to Figure 1 and Figure 4 , the test stations of the test module mainly include a liquid hydrogen valve test station 15, a vibration table test station 16, a liquid hydrogen flowmeter test station 17, a liquid hydrogen pump and vaporizer test station 18, and a liquid hydrogen storage tank test station; and relevant test interfaces are set.

[0053] The hydrogen production unit 1 mainly includes an electrolytic cell, a post-treatment device, and a purification device. The electrolytic cell is connected to the post-treatment device, and the post-treatment device is connected to the purification device. In this technical solution, the hydrogen production unit can produce and purify hydrogen raw materials.

[0054] The hydrogen in this technical solution mainly includes low-pressure hydrogen, high-pressure hydrogen, and liquid hydrogen, and the nitrogen includes low-pressure nitrogen, high-pressure nitrogen, and liquid nitrogen.

[0055] Furthermore, pressure transmitters are installed in both the low-pressure hydrogen storage tank 3 and the high-pressure hydrogen storage tank 14. By setting pressure transmitters in the above storage tanks, the pressure values can be displayed in real time.

[0056] This embodiment also proposes a test method for a hydrogen energy equipment detection platform, which mainly includes the following several steps.

[0057] Step S1: Hydrogen supply and distribution; evaluate the total amount of hydrogen and compare it with the total amount of hydrogen required for testing, judge whether it meets the test requirements, give a judgment result, and balance the hydrogen amounts in each storage tank according to the judgment result; Step S2: Nitrogen supply and distribution; evaluate the total amount of nitrogen and compare it with the total amount of nitrogen required for testing, judge whether it meets the test requirements, give a judgment result, and balance the nitrogen amounts in each storage tank; Step S3: After the hydrogen and nitrogen supply and distribution are completed, test the hydrogen energy equipment through the test stations of the test module.

[0058] For step S1, the specific judgment process is as follows: First, set the existing low-pressure hydrogen volume C0, existing high-pressure hydrogen volume C1, existing liquid hydrogen volume C2, expected photovoltaic hydrogen production volume C3, required liquid hydrogen volume C4, required low-pressure hydrogen volume C5, required high-pressure hydrogen volume C6, and hydrogen volume of the tube trailer C7.

[0059] If C0 + C1 + C2 ≥ C4 + C5 + C6, and the hydrogen volume meets the test requirements, then balance the hydrogen volume in each storage tank.

[0060] If C0 + C1 + C2 < C4 + C5 + C6, start the hydrogen production unit until C0 + C1 + C2 + C3 = C4 + C5 + C6.

[0061] If C0 + C1 + C2 + C3 < C4 + C5 + C6, the system alarms to prompt hydrogen replenishment.

[0062] Replenish the hydrogen volume of (C4 + C5 + C6) - (C0 + C1 + C2 + C3).

[0063] Compare (C4 + C5 + C6) - (C0 + C1 + C2 + C3) with the hydrogen volume of the tube trailer C7. If (C4 + C5 + C6) - (C0 + C1 + C2 + C3) ≥ C7, the hydrogen volume is sufficient; otherwise, it is necessary to purchase hydrogen from an external source to increase the hydrogen volume of the tube trailer. When C1 is less than the design pressure of the hydrogen storage tank and C0 + C1 + C2 < C4 + C5 + C6, photovoltaic electrolytic water hydrogen production is started.

[0064] The specific process of balancing the hydrogen volume in each storage tank is as follows: Balance the liquid hydrogen volume. If C2 < C4 and the liquid hydrogen volume does not meet the test requirements, automatically start the hydrogen liquefaction unit, open the control valve at the outlet of the low-pressure hydrogen storage tank to fill hydrogen into the hydrogen liquefaction unit, and the generated liquid hydrogen flows through the control valve to the liquid hydrogen storage tank until C2 ≥ C4.

[0065] Balance the high-pressure gaseous hydrogen volume. On the basis of C2 ≥ C4, if C1 < C6, first start the liquid hydrogen booster pump, boost the liquid hydrogen in the liquid hydrogen storage tank and vaporize it through the liquid hydrogen vaporizer and then enter the high-pressure hydrogen storage tank until the system stops running when C2 = C4 or C1 ≥ C6; if C2 = C4 and still C1 < C6, automatically start the high-pressure hydrogen compressor, open the remote control valve to fill hydrogen from the low-pressure hydrogen storage tank into the high-pressure hydrogen compressor until the system stops running when C1 ≥ C6.

[0066] Balance the low-pressure gaseous hydrogen volume. On the basis of ensuring C2 ≥ C4 and C1 ≥ C6, if C3 + C0 ≥ C5, automatically start the electrolytic water hydrogen production (hydrogen production unit), open the control valve, and charge the low-pressure hydrogen storage tank until C3 + C0 = C5; if C3 + C0 ≤ C5, automatically start the hydrogen production unit, open the control valve, and charge the low-pressure hydrogen storage tank. First, open the control valve to reduce the pressure of the hydrogen in the high-pressure hydrogen storage tank and then introduce it into the low-pressure hydrogen storage tank until C3 + C0 ≥ C5 or C1 = C6, and the system stops; if C1 = C6 and still C3 + C0 < C5, then open the outlet control valve of the liquid hydrogen storage tank, and the liquid hydrogen enters the high-pressure liquid hydrogen vaporizer for vaporization, pressure reduction, and then enters the low-pressure hydrogen storage tank through the control valve until C3 + C0 ≥ C5 or C2 = C4.

[0067] For step S2, the specific judgment process is as follows: First, set the existing low-pressure nitrogen volume A0, the existing high-pressure nitrogen volume A1, the calculated liquid nitrogen volume A2, the required low-pressure nitrogen volume A3, high-pressure nitrogen volume A4, and liquid nitrogen volume A5.

[0068] If A2 ≥ A5 and A2 - A5 ≥ (A4 - A1) + (A3 - A0), then the existing nitrogen volume meets the test requirements; otherwise, liquid nitrogen needs to be supplemented, and the required liquid nitrogen volume is divided into the following situations: If A2 ≥ A5 but A2 - A5 < (A4 - A1) + (A3 - A0), then at least { (A4 - A1) + (A3 - A0) - (A2 - A5)} of liquid nitrogen needs to be purchased externally; If A2 < A5, at least { (A5 - A2) + (A4 - A1) + (A3 - A0)} of liquid nitrogen needs to be purchased externally. If A4 - A1 < 0, then A4 - A1 is taken as 0; if A3 - A0 < 0, then A3 - A0 is taken as 0.

[0069] The specific process of balancing the nitrogen volume in each storage tank is as follows: On the basis of ensuring A2 ≥ A5 and A2 - A5 ≥ (A4 - A1) + (A3 - A0), if A0 < A3, then open the outlet control valve of the liquid nitrogen storage tank, and the liquid nitrogen directly enters the low-pressure nitrogen storage tank after vaporization through the low-pressure liquid nitrogen vaporizer until A0 = A3; if A1 < A4, then open the outlet control valve of the liquid nitrogen storage tank, and the liquid nitrogen is directly pressurized by the liquid nitrogen booster pump and then enters the high-pressure nitrogen storage tank after vaporization through the vaporizer until A1 = A4.

[0070] If A2 ≥ A5 but A2 - A5 < (A4 - A1) + (A3 - A0), the system alarms, indicating that there is a shortage of { (A4 - A1) + (A3 - A0) - (A2 - A5)} of liquid nitrogen, and external liquid nitrogen is purchased. After replenishing the liquid nitrogen, balance is carried out.

[0071] In case of an emergency when low-pressure nitrogen is lacking, open the outlet control valve of the high-pressure nitrogen storage tank, and it will enter the low-pressure nitrogen storage tank after passing through the pressure reducing valve.

[0072] Embodiment 2 Based on Embodiment 1, a test method for a hydrogen energy equipment detection platform in this embodiment mainly includes the following steps.

[0073] The logic for hydrogen preparation and distribution required for testing is as follows: The hydrogen sources of the test system in this embodiment mainly come from two ways: hydrogen production by photovoltaic electrolysis of water and purchased hydrogen (corresponding to the hydrogen production unit and the hydrogen unloading unit of the long tube trailer respectively). In order to make full use of photovoltaic power generation to reduce the electricity cost, when using hydrogen, photovoltaic hydrogen production is preferentially used to the maximum extent, and the hydrogen of the long tube trailer is used as the backup hydrogen source. The existing low-pressure hydrogen volume C0 is automatically calculated according to the pressure value displayed by the pressure transmitter of the low-pressure hydrogen storage tank 3, the existing high-pressure hydrogen volume C1 is automatically calculated according to the pressure value displayed by the pressure transmitter of the high-pressure hydrogen storage tank 14, the liquid hydrogen volume C2 is calculated according to the liquid level display on the liquid hydrogen storage tank 5, the expected photovoltaic hydrogen production volume C3 is calculated according to the planned detection time and the law of sunlight fluctuation, and the required liquid hydrogen volume C4, low-pressure hydrogen volume C5, and high-pressure hydrogen volume C6 at the back end are calculated according to the detection plan.

[0074] First step, ensure that the total amount of hydrogen required for testing the test system meets the requirements.

[0075] If C0 + C1 + C2 ≥ C4 + C5 + C6, the existing hydrogen volume meets the test requirements, and there is no need to start the hydrogen production unit; if C0 + C1 + C2 < C4 + C5 + C6, the existing hydrogen volume does not meet the test requirements, start the hydrogen production unit to start hydrogen production until C0 + C1 + C2 + C3 = C4 + C5 + C6; if C0 + C1 + C2 + C3 < C4 + C5 + C6, the hydrogen volume of the system cannot meet the test requirements, and the system alarms, indicating that it is necessary to use the backup hydrogen (C4 + C5 + C6) - (C0 + C1 + C2 + C3) of the long tube trailer. Compare (C4 + C5 + C6) - (C0 + C1 + C2 + C3) with the hydrogen volume C7 of the long tube trailer. If (C4 + C5 + C6) - (C0 + C1 + C2 + C3) ≥ C7, the hydrogen volume is sufficient, otherwise it is necessary to purchase an external hydrogen source to increase the hydrogen volume of the long tube trailer. When C1 is less than the design pressure of the hydrogen storage tank and C0 + C1 + C2 < C4 + C5 + C6, photovoltaic electrolysis of water for hydrogen production is started.

[0076] Second step: Balance the hydrogen volumes in each storage tank.

[0077] Due to the high operating energy consumption of the hydrogen liquefaction unit, the system first ensures that the amount of liquid hydrogen meets the test requirements and reduces the vaporization of liquid hydrogen into hydrogen. On this basis, it ensures that the amount of high-pressure hydrogen meets the test requirements and reduces the decompression of high-pressure hydrogen into low-pressure hydrogen. When the high-pressure hydrogen does not meet the demand, the high-pressure hydrogen compressor is preferentially used to boost and supplement the hydrogen. Finally, hydrogen produced by photovoltaic electrolysis of water is sent to the low-pressure hydrogen storage tank 3 to reduce energy consumption. If there is surplus hydrogen in the liquid hydrogen storage tank 5 and the high-pressure hydrogen storage tank 14, and the amount of hydrogen in the low-pressure hydrogen storage tank 3 and the amount of hydrogen produced by future electrolysis of water do not meet the demand, high-pressure hydrogen is preferentially converted into low-pressure hydrogen, and secondly, liquid hydrogen is vaporized and converted into low-pressure hydrogen.

[0078] The specific balance process is as follows: (1) Balance the amount of liquid hydrogen If C2 < C4, the amount of liquid hydrogen cannot meet the test requirements. The hydrogen liquefaction unit is automatically started, and the control valve at the outlet of the low-pressure hydrogen storage tank 3 is opened to fill hydrogen into the hydrogen liquefaction unit. The produced liquid hydrogen flows through the control valve to the liquid hydrogen storage tank 5 until C2 ≥ C4, and the system stops running.

[0079] (2) Balance the amount of high-pressure gaseous hydrogen On the basis of ensuring C2 ≥ C4, if C1 < C6, it means that the amount of high-pressure gaseous hydrogen is insufficient. The liquid hydrogen booster pump 7 is preferentially started, and the liquid hydrogen in the liquid hydrogen storage tank 5 is boosted and then vaporized through the vaporizer and enters the high-pressure storage tank until C2 = C4 or C1 ≥ C6, and then the system stops running; when C2 = C4 and still C1 < C6, the high-pressure hydrogen compressor 4 is automatically started, and the remote control valve is opened to fill hydrogen from the low-pressure hydrogen storage tank 3 into the high-pressure hydrogen compressor 4 until C1 ≥ C6 and the system stops running.

[0080] (3) Balance the amount of low-pressure gaseous hydrogen On the basis of ensuring C2 ≥ C4 and C1 ≥ C6, if C3 + C0 ≥ C5, the electrolysis of water to produce hydrogen is automatically started, and the control valve is opened to fill the low-pressure hydrogen storage tank 3 with gas until C3 + C0 = C5; if C3 + C0 ≤ C5, the hydrogen production unit is automatically started, and the control valve is opened to fill the low-pressure hydrogen storage tank 3 with gas. Since the hydrogen produced by electrolysis of water is not enough to meet the demand and the compression energy consumption is lower than the liquefaction energy consumption, the control valve is preferentially opened to decompress the hydrogen in the high-pressure hydrogen storage tank and then introduce it into the low-pressure hydrogen storage tank until C3 + C0 ≥ C5 or C1 = C6 and the system stops; when C1 = C6 and still C3 + C0 < C5, the control valve at the outlet of the liquid hydrogen storage tank 5 is opened, and the liquid hydrogen enters the high-pressure liquid hydrogen vaporizer 13 to be vaporized, decompressed, and then enters the low-pressure hydrogen storage tank 3 through the control valve until C3 + C0 ≥ C5 or C2 = C4.

[0081] The nitrogen required for testing and the distribution logic are as follows: The main source of nitrogen in the test system is purchased liquid nitrogen. Nitrogen can be used for purging and displacing the system, liquid nitrogen can be used for pre-cooling the equipment in the test system, and high-pressure nitrogen can be used for high-pressure nitrogen tests on the test equipment. The existing low-pressure nitrogen volume A0 is automatically calculated based on the pressure value displayed by the pressure transmitter of the low-pressure nitrogen storage tank 11, the existing high-pressure nitrogen volume A1 is automatically calculated based on the pressure value displayed by the pressure transmitter of the high-pressure nitrogen storage tank 12, the liquid nitrogen volume A2 is calculated based on the liquid level display on the liquid nitrogen storage tank, and the required low-pressure nitrogen volume A3, high-pressure nitrogen volume A4, and liquid nitrogen volume A5 at the rear end are calculated according to the test plan.

[0082] Step 1: The control system first ensures that the total amount of nitrogen required for the test meets the requirements.

[0083] The nitrogen source is obtained by vaporizing low-pressure liquid nitrogen; the high-pressure nitrogen is obtained by vaporizing the cryogenic liquid nitrogen after being pressurized by the liquid nitrogen booster pump 8 and then passing through the vaporizer; the liquid nitrogen is sourced from external purchases for replenishment. Since the energy consumption of the booster pump is relatively large, unless in an emergency, try to avoid reducing the high-pressure nitrogen to make up the low-pressure nitrogen volume.

[0084] If A2 ≥ A5 and A2 - A5 ≥ (A4 - A1) + (A3 - A0), then the existing nitrogen volume meets the test requirements and no external nitrogen source needs to be purchased. Otherwise, liquid nitrogen needs to be replenished, and the required liquid nitrogen volume is divided into the following situations: 1) If A2 ≥ A5 but A2 - A5 < (A4 - A1) + (A3 - A0), then at least { (A4 - A1) + (A3 - A0) - (A2 - A5)} of liquid nitrogen needs to be purchased externally; 2) If A2 < A5, at least { (A5 - A2) + (A4 - A1) + (A3 - A0)} of liquid nitrogen needs to be purchased externally. If A4 - A1 < 0 among them, then A4 - A1 is taken as 0. If A3 - A0 < 0 among them, then A3 - A0 is taken as 0.

[0085] Step 2: Balance the nitrogen volumes in each storage tank.

[0086] (1) On the basis of meeting A2 ≥ A5 and A2 - A5 ≥ (A4 - A1) + (A3 - A0), if A0 < A3, open the outlet control valve of the liquid nitrogen storage tank, and the liquid nitrogen directly enters the low-pressure nitrogen storage tank 11 after being vaporized by the vaporizer until A0 = A3; if A1 < A4, open the outlet control valve of the liquid nitrogen storage tank, and the liquid nitrogen directly enters the high-pressure nitrogen storage tank 12 after being pressurized by the liquid nitrogen booster pump 8 and then vaporized by the vaporizer until A1 = A4.

[0087] (2) If A2 ≥ A5 but A2 - A5 < (A4 - A1) + (A3 - A0), the system alarms, indicating that there is a shortage of { (A4 - A1) + (A3 - A0) - (A2 - A5)} of liquid nitrogen, and external liquid nitrogen is purchased. After replenishing the liquid nitrogen, balance according to (1).

[0088] (3)In case of an emergency when the low-pressure nitrogen is lacking, open the outlet control valve of the high-pressure nitrogen storage tank 12, and let it enter the low-pressure nitrogen storage tank 11 after passing through the pressure reducing valve.

[0089] The present invention has the test function for key equipment of liquid hydrogen, such as liquid hydrogen valves, liquid hydrogen pumps, and liquid hydrogen vaporizers, provides a performance test platform for key equipment of civil liquid hydrogen, and evaluates indexes such as its performance and service life, so as to verify the safety and reliability of the equipment before leaving the factory.

[0090] An automatic control system is implanted into the test system. According to key factors such as the specifications, models, sizes, test parameters, planned test time, and existing medium inventory of the user's test equipment, media with different pressure and temperature requirements are automatically prepared to meet the test needs, improve the test efficiency, save media, reduce costs, and at the same time reduce manual operations and improve safety.

[0091] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that any modification or equivalent replacement of the technical solutions of the present invention does not depart from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A hydrogen energy equipment detection platform test system, characterized in that: include: A hydrogen production module, comprising a hydrogen production unit (1) and a hydrogen unloading unit as a supplementary gas source, wherein the hydrogen production unit (1) and the hydrogen unloading unit are both connected to a pressurizing module; A pressurization module, comprising a first pressurization vaporization unit for pressurizing liquid hydrogen and converting it into a gas state and a second pressurization vaporization unit for pressurizing liquid nitrogen and converting it into a gas state; The test module is connected to the booster module; it includes several test stations and is provided with a test interface; The discharge module is connected to the hydrogen production module and the boosting module respectively to discharge liquid hydrogen or hydrogen gas.

2. A hydrogen energy equipment detection platform test system according to claim 1, characterized in that: The hydrogen unloading unit comprises a gas unloading column (2) and a pressure reducing system connected to the gas unloading column (2), wherein the pressure reducing system is also respectively connected to a high-pressure hydrogen compressor (4) and a low-pressure hydrogen storage tank (3).

3. A hydrogen energy equipment detection platform test system according to claim 2, characterized in that: The low-pressure hydrogen storage tank (3) is also connected to a hydrogen liquefaction unit (22), and the hydrogen liquefaction unit (22) is respectively connected to a release module and a pressurization module.

4. A hydrogen energy equipment detection platform test system according to claim 2, characterized in that: The first boosting and vaporizing unit comprises a liquid hydrogen boosting pump (7), the liquid hydrogen boosting pump (7) is connected to a high-pressure liquid hydrogen vaporizer (13), and the high-pressure liquid hydrogen vaporizer (13) is connected to a high-pressure hydrogen storage tank (14).

5. A hydrogen energy equipment detection platform test system according to claim 2, characterized in that: The second boosting and vaporizing unit comprises a liquid nitrogen boosting pump (8), the rear end of the liquid nitrogen boosting pump (8) is connected to a high-pressure liquid nitrogen vaporizer (9), the front end of the liquid nitrogen boosting pump (8) is connected to a low-pressure liquid nitrogen vaporizer (10), the other end of the high-pressure liquid nitrogen vaporizer (9) is connected to a high-pressure nitrogen storage tank (12), and the other end of the low-pressure liquid nitrogen vaporizer (10) is connected to a low-pressure nitrogen storage tank (11).

6. A hydrogen energy equipment detection platform test system according to claim 1 or 2, characterized in that: The dispersing module comprises a first dispersing unit and a second dispersing unit, wherein the first dispersing unit comprises a low-pressure recuperator (20), and the second dispersing unit comprises a high-pressure recuperator (21) and a dispersing pipe (19) connected to the high-pressure recuperator (21).

7. A hydrogen energy equipment detection platform test system according to claim 1, characterized in that: The test modules include a plurality of test stations, namely a liquid hydrogen pump and vaporizer test station (18), a liquid hydrogen valve test station (15), a vibration table test station (16), a liquid hydrogen flow meter test station (17), and a liquid hydrogen storage tank test station.

8. A hydrogen energy equipment detection platform test system according to claim 1, characterized in that: The hydrogen production unit (1) comprises an electrolyzer, the electrolyzer is connected to a post-processing device, and the post-processing device is further connected to a purification device.

9. A hydrogen energy equipment detection platform test system according to claim 2, characterized in that: The low-pressure hydrogen storage tank (3) and the high-pressure hydrogen storage tank (14) are both provided with pressure transmitters.

10. A method for testing a hydrogen energy equipment detection platform, applicable to a hydrogen energy equipment platform testing system according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, hydrogen supply allocation; evaluate the total amount of hydrogen and compare it with the total amount of hydrogen required for the test, determine whether the test requirements are met, give the judgment result, and balance the hydrogen volume of each storage tank based on the judgment result; S2: Nitrogen supply allocation; evaluate the total amount of nitrogen and compare it with the total amount of nitrogen required for the test, determine whether the test requirements are met, give the judgment result, and balance the nitrogen volume of each storage tank; S3: After the hydrogen and nitrogen supply distribution is completed, the hydrogen energy equipment is tested through the test station of the test module.

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