CN114165431B - Liquid hydrogen booster pump low-temperature performance test system and test method - Google Patents
Liquid hydrogen booster pump low-temperature performance test system and test method Download PDFInfo
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- CN114165431B CN114165431B CN202111404870.1A CN202111404870A CN114165431B CN 114165431 B CN114165431 B CN 114165431B CN 202111404870 A CN202111404870 A CN 202111404870A CN 114165431 B CN114165431 B CN 114165431B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B51/00—Testing machines, pumps, or pumping installations
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
Abstract
The invention provides a system and a method for testing low-temperature performance of a liquid hydrogen booster pump, which belong to the technical field of liquid hydrogen booster pump testing, wherein the system for testing the low-temperature performance of the liquid hydrogen booster pump comprises the following components: the system comprises a low-temperature storage and supply system, an exhaust method testing system, an emergency exhaust system and a centralized high-emission system, wherein the exhaust method testing system is provided with an inlet used for being communicated with a vaporizer, a first exhaust valve is arranged at the inlet, and the vaporizer is communicated with an outlet of a hydrogen booster pump of liquid to be tested; the exhaust method test system comprises: the inlet of the throttling element is provided with a first pressure gauge which is used for detecting the inlet and outlet pressure difference of the throttling element; the system for testing the low-temperature performance of the liquid hydrogen booster pump can test the flow of the liquid hydrogen booster pump to be tested through the exhaust method testing system, and can complete the test more rapidly and safely when the low-temperature performance test is performed on a principle model machine in the product development stage.
Description
Technical Field
The invention relates to the technical field of liquid hydrogen booster pump testing, in particular to a liquid hydrogen booster pump low-temperature performance testing system and a liquid hydrogen booster pump low-temperature performance testing method.
Background
Compared with a high-pressure gaseous hydrogen storage hydrogenation station, the liquid hydrogen storage hydrogenation station has the advantages of low storage pressure, small occupied area and low power consumption.
At present, a domestic hydrogen station has a blank liquid hydrogen technology, and one of main reasons is limited by the development of a liquid hydrogen booster pump. The liquid hydrogen booster pump mainly adopts a reciprocating low-temperature pump type, and the type of equipment has a mature liquid nitrogen temperature area industrial product foundation in China and is used in the fields of petrochemical industry, LNG filling and the like. The standard specifications of JB/T9076 and the like provide the technical conditions of the reciprocating low-temperature liquid pump, but the reciprocating low-temperature liquid pump is mainly a pump for air separation equipment, a conveying medium is only limited to liquefied gases such as liquid oxygen, liquid nitrogen, liquid argon and the like, the design temperature is only-196 ℃, and the discharge pressure is not higher than 36MPa.
However, the liquid hydrogen booster pump for conveying the liquid hydrogen medium has the design temperature as low as minus 253 ℃, the discharge pressure reaches 45MPa level and above 70MPa, and the problems of explosion prevention, static electricity prevention, safe discharge and the like are solved, so that the conventional test system is not suitable for testing the liquid hydrogen booster pump. In addition, the testing method of the existing testing system is mainly aimed at methods such as flow measurement, outlet pressure test and the like required by product shaping or delivery, and has applicability to low-temperature performance testing of a principle model machine in the product development stage.
Disclosure of Invention
Therefore, the invention aims to overcome the defect that a testing system for the liquid hydrogen booster pump does not exist in the prior art, and further provides a low-temperature performance testing system and a testing method for the liquid hydrogen booster pump.
In order to solve the technical problems, the invention provides a liquid hydrogen booster pump low-temperature performance test system, comprising:
the low-temperature storage and supply system is used for storing liquid hydrogen medium and is provided with a liquid hydrogen medium output port which is used for being communicated with the inlet of the liquid hydrogen booster pump to be tested;
the exhaust method testing system is provided with an inlet which is used for being communicated with a vaporizer, a first exhaust valve is arranged at the inlet, and the vaporizer is communicated with an outlet of a liquid hydrogen booster pump to be tested; the exhaust method test system includes: the inlet of the throttling element is provided with a first pressure gauge which is used for detecting the inlet and outlet pressure difference of the throttling element;
the emergency discharge system is communicated to an outlet pipeline of the liquid hydrogen booster pump to be tested through a second safety valve;
and the centralized high-emission system is communicated with the outlet of the exhaust method testing system and is used for discharging the testing medium.
Optionally, a flowmeter is arranged on a communication pipeline between the outlet of the vaporizer and the exhaust method testing system.
Optionally, the method further comprises: and the inflation method testing system is communicated with the outlet of the vaporizer through an air outlet valve.
Optionally, the inflation method testing system comprises: the outlet of the high-pressure gas cylinder is communicated with the degassing valve through a one-way valve, a second pressure gauge is arranged between the outlet of the high-pressure gas cylinder and the one-way valve, and the one-way valve is conducted unidirectionally towards the direction of the high-pressure gas cylinder.
Optionally, the method further comprises: the fire control device is arranged in a test area of the liquid hydrogen booster pump, is controlled by the test auxiliary system and is used for performing fire control by spraying nitrogen towards the test area.
Optionally, a first thermometer is connected to the vaporizer, and the first thermometer is used for detecting temperature changes in the vaporizer.
Optionally, an outlet of the liquid hydrogen booster pump is connected with a third pressure gauge, and the third pressure gauge is used for detecting the outlet pressure of the liquid hydrogen booster pump.
Optionally, the emergency discharge system is communicated with the outlet of the liquid hydrogen booster pump through a sinking discharge device, and the sinking discharge device is also communicated with the concentrated high-discharge system through a second exhaust valve.
The invention also provides a method for testing the low-temperature performance of the liquid hydrogen booster pump, which comprises the following steps:
s1, connecting a liquid hydrogen booster pump and a vaporizer to the liquid hydrogen booster pump low-temperature performance test system according to any one of claims 1-8, so that an inlet of the liquid hydrogen booster pump is communicated with a low-temperature storage and supply system, and an outlet of the vaporizer is communicated with an exhaust method test system;
s2, setting the frequency of a liquid hydrogen booster pump, starting the liquid hydrogen booster pump, and conveying a liquid hydrogen medium towards the liquid hydrogen booster pump through a low-temperature storage and supply system;
s3, closing an inlet of the exhaust method testing system to enable a liquid hydrogen medium output by the liquid hydrogen booster pump to be released into the vaporizer;
s4, when the outlet pressure of the liquid hydrogen booster pump reaches a first preset value, closing the liquid hydrogen booster pump;
s5, opening an inlet of an exhaust method testing system to enable the testing medium in the carburetor to enter the exhaust method testing system, wherein the exhaust method testing system limits the flow of the testing medium through a throttling element, and the throttling element is matched with a first pressure gauge at the inlet and is used for counting the flow of the testing medium;
and S6, gradually increasing the frequency of the liquid hydrogen booster pump, starting the liquid hydrogen booster pump at a set frequency by adopting the same steps as the steps S2-S5, and enabling the outlet pressure of the liquid hydrogen booster pump to respectively reach a plurality of preset values which gradually increase, so that the output pressure of the liquid hydrogen booster pump at different frequencies is tested in sequence.
Optionally, the method further comprises the following steps:
s7, opening an inlet of the inflation method testing system, starting a liquid hydrogen booster pump, and conveying a liquid hydrogen medium towards the liquid hydrogen booster pump through the low-temperature storage and supply system;
s8, directly conveying the liquid hydrogen medium output by the liquid hydrogen booster pump into a high-pressure gas cylinder of the inflation method testing system through a vaporizer;
s9, in the inflation method testing system, the flow of the output medium of the liquid hydrogen booster pump is tested through a second pressure gauge.
The technical scheme of the invention has the following advantages: .
1. The system for testing the low-temperature performance of the liquid hydrogen booster pump can test the flow of the liquid hydrogen booster pump to be tested through the exhaust method testing system, and can complete the test more rapidly and safely when the low-temperature performance test is performed on a principle model machine in the product development stage.
2. According to the liquid hydrogen booster pump low-temperature performance test system provided by the invention, when the liquid hydrogen booster pump subjected to performance test by the exhaust method test system is adopted, the flow of the liquid hydrogen booster pump can be further tested by adopting the inflation method test system, so that the test accuracy is further improved.
3. According to the method for testing the low-temperature performance of the liquid hydrogen booster pump, when the low-temperature performance test is carried out on the principle model machine in the development stage of the liquid hydrogen booster pump product, the flow of the liquid hydrogen booster pump is tested by an exhaust method by gradually increasing the frequency of the liquid hydrogen booster pump to be tested, so that the test can be completed more quickly and safely.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of one embodiment of a liquid hydrogen booster pump low temperature performance test system provided in an example of the invention.
Reference numerals illustrate:
1. a low temperature storage and supply system; 2. an exhaust method test system; 3. an emergency discharge system; 4. a centralized high-rank system; 5. an inflation method test system; 6. a liquid hydrogen booster pump; 7. a vaporizer; 8. a low temperature vessel; 9. a self-pressurizing device; 10. sampling test port; 11. a liquid hydrogen filling port; 12. a first safety valve; 13. a third exhaust valve; 14. a first exhaust valve; 15. a throttle element; 16. a first pressure gauge; 17. a sinking type discharge device; 18. a second safety valve; 19. a second exhaust valve; 20. a discharge header; 21. an H-shaped discharge port; 22. a flame arrester; 23. a flow meter; 25. an air valve; 26. a high pressure gas cylinder; 27. a one-way valve; 28. a second pressure gauge; 29. a fire fighting device; 30. a test auxiliary system; 31. a measurement and control platform; 32. a gas distribution table; 33. a first thermometer; 34. a third pressure gauge; 35. a return air discharge valve; 36. an air return pipeline; 37. and a return air valve.
Detailed Description
The following description of the embodiments of the present invention will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the invention are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical features of the different embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
The liquid hydrogen booster pump low-temperature performance test system provided by the embodiment can be used for carrying out low-temperature performance test on a principle model machine of a liquid hydrogen booster pump 6 product development stage, and can complete test more rapidly and safely.
As shown in fig. 1, a specific implementation manner of the low-temperature performance test system of the liquid hydrogen booster pump provided in this embodiment includes: a low-temperature storage and supply system 1, an exhaust method testing system 2, an emergency exhaust system 3 and a centralized high-exhaust system 4. The liquid hydrogen booster pump low temperature performance test system of this embodiment, the object to be tested who carries out the test: the liquid hydrogen booster pump 6 may be a single body, or a combination of the liquid hydrogen booster pump 6 and the vaporizer 7 may be used. When the liquid hydrogen booster pump 6 is used as a test object, the vaporizer 7 is used as a mature matching device of the test system to participate in the system operation, but the performance of the test system is not tested and evaluated.
As shown in fig. 1, the cryogenic storage and supply system 1 is used for storing a liquid hydrogen medium, and the cryogenic storage and supply system 1 is provided with a cryogenic container 8, also called a storage tank. The cryogenic container 8 is provided with a liquid hydrogen medium output port which is communicated with the inlet of the liquid hydrogen booster pump 6 to be tested, and the cryogenic container is communicated with the inlet of the liquid hydrogen booster pump 6 after being communicated with the filter through the liquid hydrogen medium output port. On the cryogenic vessel 8, a self-pressurizing means 9 is also provided for maintaining the pressure of the liquid hydrogen in the cryogenic vessel 8. The bottom of the low-temperature container 8 is also provided with a sampling test port 10 and a liquid hydrogen filling port 11, the top of the low-temperature container 8 is also communicated with a third exhaust valve 13 and a first safety valve 12, and the low-temperature container is communicated with the concentrated high-emission system 4 through the third exhaust valve 13 and the first safety valve 12. The low-temperature storage and supply system 1 is used for realizing transfer of a low-temperature medium (liquid hydrogen) before testing, liquid supply of the low-temperature medium in the testing process is carried out according to the net positive suction pressure head required by the liquid hydrogen booster pump 6, the pressure and the liquid level of the testing process container are monitored, and manual or safe linkage automatic stopping measures can be adopted when the pressure is lower or higher than the required pressure and the liquid level is lower than the required liquid level through the testing table.
As shown in fig. 1, the exhaust method testing system 2 is located at one branch of the outlet of the vaporizer 7, the exhaust method testing system 2 is provided with an inlet for communicating with the vaporizer 7, a first exhaust valve 14 is arranged at the inlet, and the vaporizer 7 is communicated with the outlet of the liquid hydrogen booster pump 6 to be tested; the exhaust method test system 2 includes: the throttle element 15, the import department of throttle element 15 is provided with first manometer 16, first manometer 16 is used for detecting the exit pressure differential of throttle element 15. When the exhaust is performed, the speed of the exhaust is limited by the throttling element 15, the inlet-outlet pressure difference of the throttling element 15 is detected by the first pressure gauge 16, so that the exhaust speed is obtained, and then the total exhaust amount is calculated according to the exhaust time. The exhaust method test system 2 is used for initial stage test of a principle model machine of a liquid hydrogen booster pump 6 and a vaporizer 7, is a test method based on a small-volume large-slope pressure rising curve, and can be used for multiple sample acquisition and rapid judgment of pump frequency matching, dynamic comprehensive characteristics, structural strength, heat transfer performance and the like. The throttling element 15 is used for satisfying the decompression safety exhaust of the high-pressure hydrogen in the single test process on one hand and is used for assisting in metering the medium capacity of the small cavity on the other hand, so that a basis is provided for converting the liquid hydrogen flow of the pressurizing section.
As shown in fig. 1, the emergency discharge system 3 is used for emergency discharge of high-pressure low-temperature hydrogen and high-pressure liquid hydrogen, and the emergency discharge system 3 is arranged for solving the problem of high-pressure low-temperature discharge of hydrogen caused by uncertain performance and unstable state of a principle model machine of the tested liquid hydrogen booster pump 6. The emergency discharge system 3 is communicated to an outlet pipeline of the liquid hydrogen booster pump 6 to be tested through a second safety valve 18, the emergency discharge system 3 is communicated with an outlet of the liquid hydrogen booster pump 6 through a sinking discharge device 17, and the sinking discharge device 17 is also communicated with the concentrated high-discharge system 4 through a second exhaust valve 19. When the outlet pressure of the liquid hydrogen booster pump 6 to be tested exceeds the limit, the excess liquid hydrogen is discharged into the submerged discharge device 17 through the second relief valve 18. When the alarm is released, the second exhaust valve 19 is opened, and the hydrogen gas in the submerged discharge device 17 is discharged through the concentrated high-discharge system 4. In summary, the emergency discharging system 3 is used for emergency discharging working conditions of high-pressure liquid hydrogen with pressure exceeding the pressure limit of the high-pressure liquid hydrogen safety valve at the outlet of the liquid hydrogen booster pump 6, or emergency working conditions of high-pressure low-temperature hydrogen or high-pressure liquid hydrogen which are required to be discharged due to abnormal performance in the test of the vaporizer 7, and belongs to emergency treatment measures of abnormal performance of a test object.
As shown in fig. 1, the centralized high-pressure exhaust system 4 is used for the lumped exhaust of hydrogen and high-pressure hydrogen, wherein on one hand, the centralized high-pressure exhaust system 4 is communicated with the outlet of the exhaust method test system 2 for exhausting the test medium. On the other hand, the concentrated high-pressure discharge system 4 communicates with the liquid hydrogen booster pump 6 through a return air discharge valve 35 for discharging the hydrogen return air in the liquid hydrogen booster pump 6. In addition, the liquid hydrogen booster pump 6 is further connected with a return air pipe 36 and a return air valve 37, the return air pipe 36 is used for recycling the hydrogen return air in the liquid hydrogen booster pump 6 into the low-temperature container 8 of the low-temperature storage and supply system 1, and the return air pipe 36 is provided with a pressure gauge and a thermometer. The centralized high-rank system 4 includes: a vertically upward discharge header 20, an H-shaped discharge port 21 and a flame arrester 22. By adopting the measure of centralized high-altitude hydrogen discharge, the lumped discharge problem of hydrogen and high-pressure hydrogen in the conventional test process is solved, and the processes of the H-shaped discharge port 21, the flame arrester 22 and the like are arranged, so that the problems of static electricity accumulation, fire, tempering and the like are solved.
As shown in fig. 1, in the low-temperature performance test system of the liquid hydrogen booster pump provided in this embodiment, a flow meter 23 is disposed on a communication pipeline between the outlet of the vaporizer 7 and the exhaust method test system 2, and the flow meter 23 is used for directly measuring the flow rate of the medium discharged from the outlet of the vaporizer 7. However, since the pressurized working-section hydrogen is unsteady flowing, errors caused by direct measurement of the flow meter 23 are liable to cause measurement misalignment. To cope with this problem, the flow statistics of the exhaust gas test system 2 are combined to make a mutual reference of the measurement results for compensating the error caused by direct measurement only by the flowmeter 23. Specifically, in the exhaust method test system 2, through the throttling element 15, on one hand, the decompression safety exhaust of the high-pressure hydrogen in the single test process is satisfied, and on the other hand, the exhaust method test system is used for assisting in metering the medium capacity of the small cavity, so that a basis is provided for converting the liquid hydrogen flow of the pressurizing section.
As shown in fig. 1, in the low-temperature performance test system of the liquid hydrogen booster pump provided in this embodiment, the system further includes: an inflation test system 5, the inflation test system 5 is positioned on the other branch of the outlet of the carburetor 7, and the inflation test system 5 is communicated with the outlet of the carburetor 7 through an air valve 25. The inflation method testing system 5 includes: the high-pressure gas cylinder 26, the export of high-pressure gas cylinder 26 pass through check valve 27 with the valve 25 that goes out, be provided with the second manometer 28 between the export of high-pressure gas cylinder 26 with the check valve 27, the check valve 27 is directed the direction unidirectional connection of high-pressure gas cylinder 26. The test system 5 by the inflation method is mainly used for a model test or a factory test of a product model. And conditions are provided for testing the supercharging pressure, supercharging flow and efficiency of continuous operation under the condition that the working performance of the pump is relatively stable.
As shown in fig. 1, in the low-temperature performance test system of the liquid hydrogen booster pump provided in this embodiment, the system further includes: fire protection device 29 is part of a safety protection system. The safety protection device in the safety protection system comprises: the device to be tested is protected and dangerous source is protected, the device to be tested is protected and is positioned at the outer side of the liquid hydrogen booster pump 6 or the liquid hydrogen booster pump 6/vaporizer 7 combination body, and is of an upper open structure with the periphery sealed, the protecting device body is composed of a steel beam frame, a protective net and a protective tapestry (such as Kevlar), the steel beam frame is reliably connected with a civil foundation, and the device to be tested can play a role in breaking protection and a certain role in shock wave protection on overpressure explosion under the abnormal test condition of a tested object; the dangerous source protection means that one or more surfaces of the low-temperature container 8 adjacent to the measured object are provided with a steel beam frame, a protective net and a protective tapestry from top to bottom, so that the container overpressure abnormality caused by the damage of broken sheets to the container structure and the vacuum insulation failure can be prevented, or the explosion hazard of a larger quantity of stored liquid hydrogen caused by the damage of broken sheets to the container is prevented. The fire fighting device 29 is arranged in the test area of the liquid hydrogen booster pump 6, and specifically, the fire fighting device 29 is positioned in an open space at the upper part of a tested object and mainly comprises an annular or tubular ventilation device with uniformly distributed pores, a pipeline valve and the like. The fire protection device 29 is controlled by a test auxiliary system 30 for fire protection by spraying nitrogen gas towards the test area. Specifically, the fire fighting device 29 has a closed loop linkage function with the performance of concentration monitoring and flame monitoring data, starts nitrogen fire fighting measures according to data abnormality, and can link nitrogen fire fighting using amounts with different pressures or flows according to data threshold values.
As shown in fig. 1, the test assisting system 30 includes: the fire control device 29 is controlled to operate by the measurement and control platform 31 and the air distribution platform 32 according to the received signals by the measurement and control platform 31. The gas distribution table 32 is used for testing various gases such as control gas, blowing gas, gas seal gas and the like, and supplying the gases according to the configuration of required pressure, flow and time sequence, the test table is used for testing remote control operation of various valves and pumps of a system, monitoring various parameters such as temperature, pressure, flow, liquid level, concentration, flame and the like, and realizing the functions of test data acquisition record, automatic interlocking control of emergency working conditions, automatic alarm treatment of hydrogen concentration/flame and the like.
As shown in fig. 1, in the low-temperature performance test system of the liquid hydrogen booster pump provided in this embodiment, the vaporizer 7 is connected with a first thermometer 33, and the first thermometer 33 is used for detecting a temperature change in the vaporizer 7. The outlet of the liquid hydrogen booster pump 6 is connected with a third pressure gauge 34, and the third pressure gauge 34 is used for detecting the outlet pressure of the liquid hydrogen booster pump 6. The inlet and the outlet of the carburetor 7 are also respectively connected with a thermometer and a pressure gauge for detecting the temperature and the pressure of the inlet and the outlet of the carburetor 7. The outlet temperature of the vaporizer 7 is an important index for evaluating the heat exchange performance of the vaporizer 7, the temperature is not lower than 15 ℃ of the ambient temperature, if the outlet temperature is abnormal, the inlet liquid temperature and the intermediate temperature are further compared with design parameters and calculation parameters, and the cause of the problem is analyzed.
In the low-temperature performance test system for the liquid hydrogen booster pump provided by the embodiment, among indexes for monitoring the performance of the liquid hydrogen booster pump 6, parameters mainly include boost pressure and boost flow, and monitoring indexes for the low-temperature performance test mainly include pump inlet pressure, inlet liquid temperature, outlet pressure, flow (direct or indirect) and the like. Among the indexes for monitoring the performance of the carburetor 7, the parameters mainly include outlet temperature and vaporization amount, and the monitoring indexes for the low-temperature performance test mainly include inlet, middle section and outlet temperature, inlet pressure, outlet pressure, flow (direct or indirect) and the like of the carburetor 7.
The low-temperature performance test system of the liquid hydrogen booster pump provided by the embodiment comprises the following steps when the low-temperature performance test of the liquid hydrogen booster pump is performed:
s1, connecting a liquid hydrogen booster pump 6 and a vaporizer 7 into the liquid hydrogen booster pump low-temperature performance test system, enabling an inlet of the liquid hydrogen booster pump 6 to be connected with a low-temperature storage and supply system 1, and enabling an outlet of the vaporizer 7 to be communicated with an exhaust method test system 2;
s2, setting the frequency of the liquid hydrogen booster pump 6, starting the liquid hydrogen booster pump 6, and conveying a liquid hydrogen medium towards the liquid hydrogen booster pump 6 through the low-temperature storage and supply system 1;
s3, closing an inlet of the exhaust method testing system 2 to enable the liquid hydrogen medium output by the liquid hydrogen booster pump 6 to be released into the vaporizer 7;
s4, when the outlet pressure of the liquid hydrogen booster pump 6 reaches a first preset value, the liquid hydrogen booster pump 6 is closed;
s5, opening an inlet of the exhaust method testing system 2, so that the testing medium in the carburetor 7 enters the exhaust method testing system 2, wherein the exhaust method testing system 2 limits the flow of the testing medium through a throttling element 15, and the throttling element 15 is matched with a first pressure gauge 16 at the inlet to count the flow of the testing medium;
s6, gradually increasing the frequency of the liquid hydrogen booster pump 6, starting the liquid hydrogen booster pump 6 at a set frequency by adopting the same steps as the steps S2-S5, and enabling the outlet pressure of the liquid hydrogen booster pump 6 to respectively reach a plurality of preset values which gradually increase, so that the output pressure of the liquid hydrogen booster pump 6 at different frequencies is tested in sequence.
When the inflation method test system 5 is also used for further testing the flow of the liquid hydrogen booster pump 6, the method further comprises the following steps:
s7, opening an inlet of the inflation method testing system 5, starting the liquid hydrogen booster pump 6, and conveying a liquid hydrogen medium towards the liquid hydrogen booster pump 6 through the low-temperature storage and supply system 1;
s8, directly conveying the liquid hydrogen medium output by the liquid hydrogen booster pump 6 into a high-pressure gas cylinder 26 of the inflation method testing system 5 through the vaporizer 7;
s9, in the inflation method testing system 5, the flow rate of the output medium of the liquid hydrogen booster pump 6 is tested by the second pressure gauge 28.
Specifically, the method for testing the low-temperature performance of the liquid hydrogen booster pump comprises the following steps:
(1) After the on-site state is confirmed, the personnel are evacuated to a remote control room.
(2) Adjusting the frequency set value of the liquid hydrogen booster pump 6 to 25Hz; the remote control is used for opening a button of the liquid-starting hydrogen booster pump 6 and simultaneously starting a pump motor and a fan. Gradually increasing the single pump test frequency: 30Hz, 35Hz, 40Hz, 45Hz, 50Hz.
(3) The running process of the liquid hydrogen booster pump 6 closely monitors parameters such as the outlet pressure, the inlet temperature and the like of the liquid hydrogen booster pump 6, and data acquisition records are carried out; and closely observing the system state in the video, and taking emergency stop measures in case of abnormal conditions such as leakage and the like.
(4) Checking a pump stopping state every time when 5MPa is raised, and stopping the pump by adopting a mode of connecting a set pressure with automatic stopping; the set values of the test pressure are 5MPa, 10MPa, 15MPa, 20MPa, … …, 50MPa or 90MPa respectively.
(5) The pump boost pressure reaches or exceeds the target test boost pressure, and is qualified in test.
(6) And repeating the pressurizing and the pressure releasing to reach the target value for multiple times.
(7) And (5) remotely monitoring the state of the belt pressure after the shutdown of the highest test pressure to confirm that no abnormality exists, and ending the test.
(8) The plenum is vented and a data curve of the drop in exhaust pressure is recorded.
(9) And calibrating the check flow coefficient by combining the throttling element 15, calculating to obtain a data curve of the exhaust flow changing along with time, and calculating to obtain the average supercharging flow according to the total mass of the exhaust obtained by integrating the curve and the supercharging time in the same pressure interval.
(10) The outlet temperature of the vaporizer 7 is used for evaluating an important index of the heat exchange performance of the vaporizer 7, the temperature is not lower than 15 ℃ of the ambient temperature, if the outlet temperature is abnormal, the inlet liquid temperature and the intermediate temperature are further compared with design parameters and calculation parameters, and the cause of the problem is analyzed.
(11) The vaporization quantity index test calculation of the vaporizer 7 takes the pressurizing flow of the liquid hydrogen booster pump 6 as a reference, and is combined with the temperature index to carry out comprehensive evaluation.
(12) After the main performance indexes such as the boost pressure, the average flow of the liquid hydrogen booster pump 6, the outlet temperature of the vaporizer 7, the vaporization amount and the like reach the design requirements, an inflation method test or a flow meter 23 method test is carried out by using the inflation method test system 5, and the test method is referred to as JB/T9076.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (10)
1. Liquid hydrogen booster pump low temperature performance test system, its characterized in that includes:
a low-temperature storage and supply system (1) for storing liquid hydrogen medium, which is provided with a liquid hydrogen medium output port for communicating with the inlet of a liquid hydrogen booster pump (6) to be tested;
an exhaust method test system (2) is provided with an inlet which is used for being communicated with a vaporizer (7), a first exhaust valve (14) is arranged at the inlet, and the vaporizer (7) is communicated with an outlet of a liquid hydrogen booster pump (6) to be tested; the exhaust method test system (2) includes: the device comprises a throttling element (15), wherein a first pressure gauge (16) is arranged at an inlet of the throttling element (15), and the first pressure gauge (16) is used for detecting inlet-outlet pressure difference of the throttling element (15);
an emergency discharge system (3) which is communicated with an outlet pipeline of the liquid hydrogen booster pump (6) to be tested through a second safety valve (18);
and the concentrated high-emission system (4) is communicated with the outlet of the exhaust method testing system (2) and is used for discharging the testing medium.
2. The system according to claim 1, wherein a flowmeter (23) is provided on a communication pipe between the outlet of the vaporizer (7) and the exhaust method test system (2).
3. The liquid hydrogen booster pump low temperature performance test system of claim 1, further comprising: and the inflation method testing system (5) is communicated with the outlet of the vaporizer (7) through a degassing valve (25).
4. A liquid hydrogen booster pump low temperature performance test system according to claim 3, wherein the inflation method test system (5) comprises: the high-pressure gas cylinder (26), the export of high-pressure gas cylinder (26) pass through check valve (27) with go out gas valve (25) intercommunication, the export of high-pressure gas cylinder (26) with be provided with second manometer (28) between check valve (27), check valve (27) orientation high-pressure gas cylinder (26) direction one-way switch on.
5. The liquid hydrogen booster pump low temperature performance test system according to any one of claims 1 to 4, further comprising: and a fire control device (29) which is arranged in the test area of the liquid hydrogen booster pump (6), is controlled by a test auxiliary system (30), and is used for performing fire control by spraying nitrogen gas towards the test area.
6. The system according to any one of claims 1 to 4, wherein a first thermometer (33) is connected to the vaporizer (7), and the first thermometer (33) is used for detecting temperature change in the vaporizer (7).
7. The liquid hydrogen booster pump low temperature performance test system according to any one of claims 1 to 4, wherein the outlet of the liquid hydrogen booster pump (6) is connected with a third pressure gauge (34), and the third pressure gauge (34) is used for detecting the outlet pressure of the liquid hydrogen booster pump (6).
8. The liquid hydrogen booster pump low temperature performance test system according to any one of claims 1-4, wherein the emergency exhaust system (3) is in communication with the outlet of the liquid hydrogen booster pump (6) through a submerged exhaust (17), the submerged exhaust (17) also being in communication with the concentrated high exhaust system (4) through a second exhaust valve (19).
9. The low-temperature performance test method of the liquid hydrogen booster pump is characterized by comprising the following steps of:
s1, connecting a liquid hydrogen booster pump (6) and a vaporizer (7) to the liquid hydrogen booster pump low-temperature performance test system according to any one of claims 1-8, enabling an inlet of the liquid hydrogen booster pump (6) to be communicated with a low-temperature storage and supply system (1), and enabling an outlet of the vaporizer (7) to be communicated with an exhaust method test system (2);
s2, setting the frequency of a liquid hydrogen booster pump (6), starting the liquid hydrogen booster pump (6), and conveying a liquid hydrogen medium towards the liquid hydrogen booster pump (6) through the low-temperature storage and supply system (1);
s3, closing an inlet of the exhaust method test system (2) to enable a liquid hydrogen medium output by the liquid hydrogen booster pump (6) to be released into the vaporizer (7);
s4, when the outlet pressure of the liquid hydrogen booster pump (6) reaches a first preset value, closing the liquid hydrogen booster pump (6);
s5, opening an inlet of an exhaust method testing system (2), enabling a testing medium in a carburetor (7) to enter the exhaust method testing system (2), limiting the flow of the testing medium by the exhaust method testing system (2) through a throttling element (15), and counting the flow of a detection medium by matching the throttling element (15) with a first pressure gauge (16) at the inlet;
s6, gradually increasing the frequency of the liquid hydrogen booster pump (6), starting the liquid hydrogen booster pump (6) at a set frequency by adopting the same steps as the steps S2-S5, and enabling the outlet pressure of the liquid hydrogen booster pump (6) to respectively reach a plurality of preset values which gradually increase, so that the output pressure of the liquid hydrogen booster pump (6) at different frequencies is tested in sequence.
10. The method for testing the low-temperature performance of the liquid hydrogen booster pump according to claim 9, further comprising the steps of:
s7, opening an inlet of the inflation method testing system (5), starting the liquid hydrogen booster pump (6), and conveying a liquid hydrogen medium towards the liquid hydrogen booster pump (6) through the low-temperature storage and supply system (1);
s8, directly conveying the liquid hydrogen medium output by the liquid hydrogen booster pump (6) into a high-pressure gas cylinder (26) of the inflation method test system (5) through a vaporizer (7);
s9, in the inflation method testing system (5), the flow of the output medium of the liquid hydrogen booster pump (6) is tested through a second pressure gauge (28).
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| WO2018012779A1 (en) * | 2016-07-13 | 2018-01-18 | 하이리움산업(주) | Hydrogen fuel filling system using liquid hydrogen and method for supplying hydrogen fuel by hydrogen fuel filling system |
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