CN115247643A - Liquid hydrogen booster pump performance test platform and test method - Google Patents
Liquid hydrogen booster pump performance test platform and test method Download PDFInfo
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- CN115247643A CN115247643A CN202110447892.XA CN202110447892A CN115247643A CN 115247643 A CN115247643 A CN 115247643A CN 202110447892 A CN202110447892 A CN 202110447892A CN 115247643 A CN115247643 A CN 115247643A
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- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 457
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- 239000007788 liquid Substances 0.000 title claims abstract description 177
- 238000011056 performance test Methods 0.000 title claims abstract description 28
- 238000010998 test method Methods 0.000 title claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 18
- 230000005540 biological transmission Effects 0.000 claims description 30
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 16
- 150000002431 hydrogen Chemical class 0.000 claims description 12
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- 238000000034 method Methods 0.000 claims description 9
- 229910052757 nitrogen Inorganic materials 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 239000007789 gas Substances 0.000 claims description 6
- 238000005259 measurement Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 4
- 239000011229 interlayer Substances 0.000 claims description 4
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- 238000009530 blood pressure measurement Methods 0.000 claims description 3
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- 238000010438 heat treatment Methods 0.000 claims description 3
- 239000001307 helium Substances 0.000 claims description 3
- 229910052734 helium Inorganic materials 0.000 claims description 3
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- 229920002635 polyurethane Polymers 0.000 claims description 2
- 239000004814 polyurethane Substances 0.000 claims description 2
- 238000005086 pumping Methods 0.000 claims 1
- 239000000446 fuel Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
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Classifications
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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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- 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
- F04B23/00—Pumping installations or systems
- F04B23/02—Pumping installations or systems having reservoirs
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
-
- 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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/45—Hydrogen technologies in production processes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The application provides a liquid hydrogen booster pump performance test platform and test method, include: the liquid hydrogen booster pump performance testing platform and the testing method can realize comprehensive performance testing of 0.3-90 MPa of outlet pressure of the liquid hydrogen booster pump, 0-150 kg/h of flow and electric power, and accordingly performance of the liquid hydrogen booster pump can be effectively evaluated.
Description
Technical Field
The application belongs to the technical field of refrigeration, low temperature and hydrogen energy, and particularly relates to a liquid hydrogen booster pump performance test platform and a test method.
Background
The liquid hydrogen is hydrogenThe liquid obtained by cooling is a colorless, tasteless, high-energy and low-temperature liquid fuel. Density of saturated liquid hydrogen (70.85 kg/m) 3 ) Is gaseous hydrogen in the standard state (0.089 kg/m) 3 ) Nearly 800 times, the liquid hydrogen has incomparable advantages in the aspects of energy storage density and transportation cost, and the development space is wider. The hydrogen station is a necessary infrastructure for the popularization and the application of fuel cell automobiles, and is also an important component of the hydrogen energy industry. Compared with a gas hydrogen refueling station with the same scale, the hydrogen storage capacity of the liquid hydrogen refueling station can be greatly improved. In Europe, america and Japan, a 70MPa liquid hydrogen refueling station has become a necessary trend for the technical development of the refueling station.
The liquid hydrogen refueling station is a facility for effectively utilizing liquid hydrogen and can provide fuel for a hydrogen fuel automobile. In the mature process abroad, generally, gaseous hydrogen is reduced to 20K in a liquid hydrogen factory for liquefaction, then the liquid hydrogen is transported to a hydrogenation station through a liquid hydrogen tank car and stored in a liquid hydrogen storage tank in the station, a low-temperature liquid hydrogen pump sucks the liquid hydrogen and then pressurizes the liquid hydrogen, the gasified high-pressure gaseous hydrogen is stored in a hydrogen storage bottle group in a high-pressure gasifier, and when a vehicle is hydrogenated, gas is taken from the hydrogen storage bottle group for filling. The liquid hydrogen booster pump is indispensable equipment in the liquid hydrogen storage gaseous state hydrogenation station technology, also is the key equipment that reduces liquid hydrogen storage gaseous state hydrogenation station energy consumption. The liquid hydrogen pump manufactured by German Linde company in 2018 has the liquid hydrogen flow rate of 100kg/h and the highest pressure of 87.5MPa, and is used for pressurizing liquid hydrogen at the medium-low pressure (3 bar) and the extremely low temperature (24.6K) in a liquid hydrogen Dewar, so that the energy consumption is reduced. Therefore, the performance of the liquid hydrogen booster pump (outlet pressure, flow rate and the like) is directly related to the energy consumption of the liquid hydrogen storage gaseous hydrogen station, and no related liquid hydrogen booster pump performance test platform is available for effectively evaluating the operation performance of the liquid hydrogen booster pump.
Disclosure of Invention
In view of this, it is necessary to provide a liquid hydrogen booster pump performance test platform and a test method capable of effectively evaluating the performance of a liquid hydrogen booster pump for the defects in the prior art.
In order to solve the above problems, the following technical solutions are adopted in the present application:
on the one hand, this application provides a liquid hydrogen booster pump capability test platform, includes: the system comprises a liquid hydrogen storage tank (1), a first liquid hydrogen low-temperature transmission pipeline (5), a liquid hydrogen booster pump (6), a low-temperature pipeline (9), a low-temperature control unit (10), a flowmeter (11), a plurality of high-pressure hydrogen storage tanks, a hydrogen pipeline (20), a hydrogen liquefier (23), a second liquid hydrogen low-temperature transmission pipeline (26), a first low-temperature high-pressure hydrogen pipeline (38), a low-temperature high-pressure hydrogen storage tank (1504) and a second low-temperature high-pressure hydrogen pipeline (42); wherein:
the liquid hydrogen storage tank (1) is connected with the liquid hydrogen booster pump (6) through the first liquid hydrogen low-temperature transmission pipeline (5), the liquid hydrogen booster pump (6) is connected with the low-temperature control unit (10) through the low-temperature pipeline (9), the low-temperature control unit (10) is connected with the plurality of high-pressure hydrogen storage tanks, the plurality of high-pressure hydrogen storage tanks are connected with the hydrogen liquefier (23) through the hydrogen pipeline (20), the low-temperature control unit (10) is connected with the low-temperature high-pressure hydrogen storage tank (1504) through the first low-temperature high-pressure hydrogen pipeline (38), the low-temperature high-pressure hydrogen storage tank (1504) is connected with the hydrogen liquefier (23) through the second low-temperature high-pressure hydrogen pipeline (42), and the hydrogen liquefier (23) is connected with the liquid hydrogen storage tank (1) through the second liquid hydrogen low-temperature transmission pipeline (26);
still be provided with first ooff valve (28) between liquid hydrogen storage tank (1) and liquid hydrogen booster pump (6), first liquid hydrogen low temperature transmission pipeline (5) still are equipped with second ooff valve (2), check valve (3) and third ooff valve (4) in proper order.
In some of these embodiments, the liquid hydrogen booster pump (6) employs a single-stage compression or multi-stage compression reciprocating pump, which may be in the form of a piston pump or a plunger pump.
In some embodiments, the low-temperature control unit (10) may adopt one or more ultrahigh-pressure gasifiers or a combination of an ultrahigh-pressure gasifier and a heater to regulate the temperature of the low-temperature high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6), so as to ensure that the temperatures of the high-pressure hydrogen tanks and the inlets of the low-temperature high-pressure hydrogen storage tanks (1504) are in the range of 60K to 300K.
In some embodiments, the ultrahigh pressure gasifier is made of aluminum, is provided with a liquid inlet and an air outlet, adopts a light pipe and fin type, has a pressure bearing range of 100MPa at most, and realizes single-point temperature regulation and control of low-temperature high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6) in one or more serial or multiple parallel modes.
In some embodiments, the heater is a built-in heating rod, the pressure bearing range of the heater is up to 100MPa, and the accurate and continuous temperature control of the low-temperature and high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6) within the range of 33K-253K can be realized.
In some embodiments, the first liquid hydrogen low-temperature transmission pipeline (5) and the second liquid hydrogen low-temperature transmission pipeline (26) are kept cold in a vacuum multi-layer heat insulation mode, a plurality of layers of heat insulation materials are wrapped on the outer surface of the inner pipe, a vacuum is pumped between the inner pipe and the outer pipe and is lower than Pa, and a corrugated pipe is used for stress compensation.
In some embodiments, the low-temperature pipeline (9), the first low-temperature high-pressure hydrogen pipeline (38) and the second low-temperature high-pressure hydrogen pipeline (42) are cooled by adopting a vacuum multilayer heat insulation mode, a plurality of layers of heat insulation materials are wrapped on the outer surface of an inner pipe, a vacuum is pumped between the inner pipe and the outer pipe and is lower than Pa, and a corrugated pipe is adopted for stress compensation; or a single-layer pipe can be adopted, and the outside of the pipe is foamed and formed by polyurethane to play a role in heat insulation.
In some embodiments, the thermal insulation material is a glass fiber paper and aluminum foil composite, or glass bead thermal insulation material.
In some embodiments, the number of the high-pressure hydrogen storage tanks is 3, and the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502) and the third high-pressure hydrogen storage tank (1503) are sequentially recorded, the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502) and the third high-pressure hydrogen storage tank (1503) adopt a normal-temperature hydrogen storage tank managed by a plurality of pressure levels, when the temperature at the inlet of the high-pressure hydrogen storage tank is greater than 253K, the hydrogen storage pressure range of the third high-pressure hydrogen storage tank (1503) is 45-90 MPa, the hydrogen storage pressure range of the second high-pressure hydrogen storage tank (1502) is 20-45 MPa, and the maximum hydrogen storage pressure of the first high-pressure hydrogen storage tank (1501) is 20MPa.
In some embodiments, the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502) and the third high-pressure hydrogen storage tank (1503) are connected in parallel, the third high-pressure hydrogen storage tank (1503) supplies hydrogen to the second high-pressure hydrogen storage tank (1502) through a pressure reducing valve, the second high-pressure hydrogen storage tank (1502) supplies hydrogen to the first high-pressure hydrogen storage tank (1501) through a pressure reducing valve, and the first high-pressure hydrogen storage tank (1501) supplies hydrogen to the hydrogen liquefier (23) through the hydrogen pipeline (20) through a pressure reducing valve.
In some embodiments, the low-temperature high-pressure hydrogen storage tank (1504) is kept cold in a vacuum multi-layer heat insulation mode, multiple layers of heat insulation materials are wrapped on the outer surface of the inner pipe, a vacuum layer between the inner vacuum layer and the outer vacuum layer is vacuumized to be lower than Pa, and when the temperature of liquid hydrogen at the inlet of the high-pressure hydrogen storage tank is lower than 253K, the low-temperature high-pressure hydrogen storage tank (1504) can realize low-temperature high-pressure hydrogen storage with the pressure of 90MPa at most.
In some of these embodiments, the hydrogen liquefier (23) takes the form of multiple liquefaction cycles: the method comprises a Linde-Hampson hydrogen liquefaction cycle with precooling, a helium expansion refrigeration hydrogen liquefaction cycle with precooling of liquid nitrogen or mixed working medium, or a hydrogen expansion refrigeration liquefaction cycle with precooling of liquid nitrogen or mixed working medium or a liquid nitrogen-level expander.
In some embodiments, a thermometer and a pressure measuring unit are further arranged on the first liquid hydrogen low-temperature transmission pipeline (5) and the low-temperature pipeline (9).
In some embodiments, a flow meter (11) is further arranged on a pipeline between the low-temperature control unit (10) and the high-pressure hydrogen storage tanks, the flow meter (11) is used for testing the flow rate of low-temperature high-pressure hydrogen, and the flow meter (11) adopts a plurality of parallel sectional type flow meters to meet the flow rate measurement of the low-temperature high-pressure hydrogen with different measuring range accuracies.
In some embodiments, an electric power measuring unit (31) is further connected to the liquid hydrogen booster pump (6) and is used for measuring the power of the liquid hydrogen booster pump (6).
In some embodiments, the electric power meter further comprises a data acquisition unit (37), and the thermometer, the pressure measurement unit, the flow meter (11) and the electric power measurement unit (31) are all connected with the data acquisition unit (37).
On the other hand, the application also provides a test method of the liquid hydrogen booster pump performance test platform, which comprises the following steps:
opening an outlet valve (28) of the liquid hydrogen storage tank (1), and precooling and cooling each pipeline of the liquid hydrogen booster pump (6) and the low-temperature high-pressure hydrogen transmission pipeline (9) along the way by adopting low-temperature saturated hydrogen;
after precooling is finished, the outlet valve (28) is closed, the second switch valve (2), the one-way valve (3) and the third switch valve (4) are opened, liquid hydrogen is conveyed to the liquid hydrogen booster pump (6), and the liquid hydrogen is boosted to be low-temperature high-pressure hydrogen;
the temperature at the inlet of the high-pressure hydrogen storage tank is controlled through the low-temperature control unit (10), and when the temperature is higher than 253K, the high-pressure hydrogen storage tank is determined and low-temperature supercritical hydrogen is stored in the high-pressure hydrogen storage tank; storing low temperature supercritical hydrogen in the low temperature high pressure hydrogen storage tank (1504) when the temperature at the high pressure hydrogen storage tank inlet is less than 253K;
the hydrogen in the high-pressure hydrogen storage tank is depressurized and then is conveyed to the hydrogen liquefier (23) through the hydrogen pipeline (20), and the hydrogen in the low-temperature high-pressure hydrogen storage tank (1504) is depressurized and then is conveyed to the hydrogen liquefier (23) through the first low-temperature high-pressure hydrogen pipeline (38);
and the hydrogen in the hydrogen liquefier (23) returns to the liquid hydrogen storage tank (1) through the second low-temperature high-pressure hydrogen pipeline (42) to complete the sequence.
The technical scheme adopted by the application has the following effects:
the application provides a liquid hydrogen booster pump performance test platform and test method, include: the liquid hydrogen booster pump performance testing platform and the testing method can realize comprehensive performance testing of 0.3-90 MPa of outlet pressure of the liquid hydrogen booster pump, 0-150 kg/h of flow and electric power, and accordingly performance of the liquid hydrogen booster pump can be effectively evaluated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments of the present application or the prior art will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a performance testing platform of a liquid hydrogen booster pump provided in embodiment 1 of the present application;
fig. 2 is a flowchart illustrating steps of a performance testing platform of a liquid hydrogen booster pump according to embodiment 2 of the present application.
Wherein: the hydrogen storage tank comprises a liquid hydrogen storage tank (1), a second switch valve (2), a one-way valve (3), a third switch valve (4), a first liquid hydrogen low-temperature transmission pipeline (5), a liquid hydrogen booster pump (6), a bypass valve (7), a switch valve (8), a low-temperature pipeline (9), a low-temperature control unit (10), a flowmeter (11), switch valves (12, 13, 14), high-pressure hydrogen storage tanks (1501, 1502, 1503), pressure reducing valves (16, 17, 19), switch valves (18, 21), a hydrogen pipeline (20), process and safety exhaust units (22, 25 and 32), a hydrogen liquefier (23), switch valves (24, 27), a second liquid hydrogen low-temperature transmission pipeline (26), an outlet valve (28), outlet valves (29, 33 and 35), pressure measuring units (30, 34 and 36), an electric power measuring unit (31), a data collecting unit (37), a first low-temperature high-pressure hydrogen pipeline (38), a low-temperature high-pressure hydrogen storage tank (1504), switch valves (39), switch valves (40), pressure reducing valves (41) and a second low-temperature high-pressure hydrogen pipeline (42).
Detailed Description
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present application and should not be construed as limiting the present application.
In the description of the present application, it is to be understood that the terms "upper", "lower", "horizontal", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments.
Example 1
Referring to fig. 1, a schematic structural diagram of a performance testing platform of a liquid hydrogen booster pump according to embodiment 1 of the present application includes: the system comprises a liquid hydrogen storage tank (1), a first liquid hydrogen low-temperature transmission pipeline (5), a liquid hydrogen booster pump (6), a low-temperature pipeline (9), a low-temperature control unit (10), a flowmeter (11), a plurality of high-pressure hydrogen storage tanks, a hydrogen pipeline (20), a hydrogen liquefier (23), a second liquid hydrogen low-temperature transmission pipeline (26), a first low-temperature high-pressure hydrogen pipeline (38), a low-temperature high-pressure hydrogen storage tank (1504) and a second low-temperature high-pressure hydrogen pipeline (42). Specific implementations of the various components are described in detail below.
In some embodiments, the liquid hydrogen storage tank (1) can adopt a vertical type, a horizontal type or a spherical type.
In some of these embodiments, the liquid hydrogen booster pump (6) employs a single-stage compression or multi-stage compression reciprocating pump, which may be in the form of a piston pump or a plunger pump.
In some embodiments, the low-temperature control unit (10) may adopt one or more ultrahigh-pressure gasifiers or a combination of an ultrahigh-pressure gasifier and a heater to regulate the temperature of the low-temperature high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6), so as to ensure that the temperatures of the high-pressure hydrogen tanks and the inlets of the low-temperature high-pressure hydrogen storage tanks (1504) are in the range of 60K to 300K.
Further, the ultrahigh pressure gasifier adopts aluminium system material, the ultrahigh pressure gasifier is equipped with inlet and gas outlet, the ultrahigh pressure gasifier adopts light pipe plus fin form, and the pressure-bearing range is 100MPa at most, the ultrahigh pressure gasifier realizes through one or more series connection or a plurality of parallel mode that the single-point temperature of the low temperature high pressure hydrogen of liquid hydrogen booster pump (6) export is regulated and control.
Furthermore, the heater is a built-in heating rod, the pressure bearing range of the heater is up to 100MPa, and the accurate and continuous temperature control of the low-temperature and high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6) within the range of 33K-253K can be realized.
In some embodiments, the first liquid hydrogen low-temperature transmission pipeline (5) and the second liquid hydrogen low-temperature transmission pipeline (26) are kept cold in a vacuum multi-layer heat insulation mode, a plurality of layers of heat insulation materials are wrapped on the outer surface of the inner pipe, a vacuum is pumped between the inner pipe and the outer pipe and is lower than Pa, and a corrugated pipe is used for stress compensation.
In some embodiments, the low-temperature pipeline (9), the first low-temperature high-pressure hydrogen pipeline (38) and the second low-temperature high-pressure hydrogen pipeline (42) are kept cold in a vacuum multi-layer heat insulation mode, a plurality of layers of heat insulation materials are wrapped on the outer surface of the inner pipe, a vacuum is pumped between the inner pipe and the outer pipe to be lower than Pa, and a corrugated pipe is used for stress compensation; or a single-layer pipe can be adopted, and polyurethane foam forming is adopted outside the pipe to play a role in heat insulation.
Further, the heat-insulating material is formed by compounding glass fiber paper and aluminum foil or a glass bead heat-insulating material.
Further, the number of the high-pressure hydrogen storage tanks is 3, and the first high-pressure hydrogen storage tank (1501), the first high-pressure hydrogen storage tank (1502), the third high-pressure hydrogen storage tank (1503), the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502), and the third high-pressure hydrogen storage tank (1503) are sequentially recorded as normal-temperature hydrogen storage tanks managed by a plurality of pressure levels, when the temperature at the inlet of the high-pressure hydrogen storage tank is higher than 253K, the hydrogen storage pressure range of the third high-pressure hydrogen storage tank (1503) is 45-90 MPa, the hydrogen storage pressure range of the second high-pressure hydrogen storage tank (1502) is 20-45 MPa, and the maximum hydrogen storage pressure of the first high-pressure hydrogen storage tank (1501) is 20MPa.
Further, the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502) and the third high-pressure hydrogen storage tank (1503) are connected in parallel, the third high-pressure hydrogen storage tank (1503) conveys hydrogen to the second high-pressure hydrogen storage tank (1502) through a pressure reducing valve (16), the second high-pressure hydrogen storage tank (1502) conveys hydrogen to the first high-pressure hydrogen storage tank (1501) through a pressure reducing valve (17), and the first high-pressure hydrogen storage tank (1501) conveys hydrogen to the hydrogen liquefier (23) through a pressure reducing valve (19) and through the hydrogen pipeline (20).
Further, the low-temperature high-pressure hydrogen storage tank (1504) is kept cold in a vacuum multi-layer heat insulation mode, multiple layers of heat insulation materials are bound on the outer surface of the inner pipe, the vacuumizing between the inner vacuum interlayer and the outer vacuum interlayer is lower than Pa, and when the temperature of liquid hydrogen at the inlet of the high-pressure hydrogen storage tank is lower than 253K, the low-temperature high-pressure hydrogen storage tank (1504) can realize the low-temperature high-pressure hydrogen storage with the pressure of 90MPa at most.
In some of these embodiments, the hydrogen liquefier (23) takes the form of multiple liquefaction cycles: the method comprises a Linde-Hampson hydrogen liquefaction cycle with precooling, a helium expansion refrigeration hydrogen liquefaction cycle with precooling of liquid nitrogen or mixed working medium, or a hydrogen expansion refrigeration liquefaction cycle with precooling of liquid nitrogen or mixed working medium or a liquid nitrogen-level expander.
Referring to fig. 1 again, the liquid hydrogen storage tank (1) is connected to the liquid hydrogen booster pump (6) through the first liquid hydrogen low-temperature transmission pipeline (5), the liquid hydrogen booster pump (6) is connected to the low-temperature control unit (10) through the low-temperature pipeline (9), the low-temperature control unit (10) is connected to the plurality of high-pressure hydrogen storage tanks, the plurality of high-pressure hydrogen storage tanks are connected to the hydrogen liquefier (23) through the hydrogen pipeline (20), the low-temperature control unit (10) is connected to the low-temperature high-pressure hydrogen storage tank (1504) through the first low-temperature high-pressure hydrogen pipeline (38), the low-temperature high-pressure hydrogen storage tank (1504) is connected to the hydrogen liquefier (23) through the second low-temperature high-pressure hydrogen pipeline (42), and the hydrogen liquefier (23) is connected to the liquid hydrogen storage tank (1) through the second liquid hydrogen low-temperature transmission pipeline (26); still be provided with first ooff valve (28) between liquid hydrogen storage tank (1) and liquid hydrogen booster pump (6), first liquid hydrogen low temperature transmission line (5) still are equipped with second ooff valve (2), check valve (3) and third ooff valve (4) in proper order.
The above embodiment 1 of this application provides a liquid hydrogen booster pump capability test platform, its working method as follows:
it can be understood that the gas replacement in the pipeline of the test platform is firstly completed for multiple times, after the impurity content of the redundant gas in the system meets the requirement, the system is kept at about 0.15MPa (gauge pressure) of residual pressure until the experiment is carried out, and the method specifically comprises the following steps:
opening an outlet valve (28) of the liquid hydrogen storage tank (1), and precooling and cooling each pipeline of the liquid hydrogen booster pump (6) and the low-temperature high-pressure hydrogen transmission pipeline (9) along the way by adopting low-temperature saturated hydrogen;
after precooling is finished, the outlet valve (28) is closed, the second switch valve (2), the one-way valve (3) and the third switch valve (4) are opened, liquid hydrogen is conveyed to the liquid hydrogen booster pump (6), and the liquid hydrogen is boosted to be low-temperature high-pressure hydrogen; the temperature at the inlets of a first high-pressure hydrogen storage tank (1501), a second high-pressure hydrogen storage tank (1502) and a third high-pressure hydrogen storage tank (1503) is effectively controlled through a low-temperature control unit (10), and when the temperature is higher than 253K, hydrogen is determined to be stored in the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502) or the third high-pressure hydrogen storage tank (1503) according to the pressure; storing low temperature high pressure hydrogen in said low temperature high pressure hydrogen storage tank (1504) when the temperature is less than 253K, thereby completing a continuous operation open cycle; the hydrogen in the high-pressure hydrogen storage tank is depressurized and then is conveyed to the hydrogen liquefier (23) through the hydrogen pipeline (20), and the hydrogen in the low-temperature high-pressure hydrogen storage tank (1504) is depressurized and then is conveyed to the hydrogen liquefier (23) through the first low-temperature high-pressure hydrogen pipeline (38); and the hydrogen in the hydrogen liquefier (23) returns to the liquid hydrogen storage tank (1) through the second low-temperature high-pressure hydrogen pipeline (42) to finish the sequence.
It is understood that the operation time depends on the hydrogen storage capacity of the high-pressure hydrogen storage tank, and the high-pressure hydrogen storage tank 1503 or 1504 may also be used as a hydrogen storage buffer tank of the hydrogen liquefier.
Furthermore, the first liquid hydrogen low-temperature transmission pipeline (5) and the low-temperature pipeline (9) are also provided with thermometers (such as 29, 33 and 35 in the figure 1) and pressure measuring units (such as 30, 34 and 36 in the figure), wherein the thermometers can detect the corresponding temperatures in the pipelines, and the pressure measuring units can detect the corresponding pressures in the pipelines.
Further, a flowmeter (11) is further arranged on a pipeline between the low-temperature control unit (10) and the high-pressure hydrogen storage tanks, the flowmeter (11) is used for testing the flow of low-temperature high-pressure hydrogen, and the flowmeter (11) adopts a plurality of parallel sectional flowmeters to meet the flow measurement of the low-temperature high-pressure hydrogen with different measuring range accuracy.
Further, an electric power measuring unit (31) is connected to the liquid hydrogen booster pump (6) and is used for measuring the power of the liquid hydrogen booster pump (6).
Further, the temperature meter, the pressure measuring unit, the flow meter (11) and the electric power measuring unit (31) are all connected with the data acquisition unit (37).
The liquid hydrogen booster pump performance test platform provided by the application can realize comprehensive performance test of outlet pressure of 0.3 MPa-90 MPa, flow of 0-150 kg/h and electric power of the liquid hydrogen booster pump, thereby effectively evaluating the performance of the liquid hydrogen booster pump.
Example 2
Referring to fig. 2, a method for testing a performance testing platform of a liquid hydrogen booster pump according to embodiment 2 of the present application includes the following steps:
step S110: opening an outlet valve (28) of the liquid hydrogen storage tank (1), and precooling and cooling each pipeline of the liquid hydrogen booster pump (6) and the low-temperature high-pressure hydrogen transmission pipeline (9) along the way by adopting low-temperature saturated hydrogen;
step S120: after precooling is finished, closing the outlet valve (28), opening the second switch valve (2), the one-way valve (3) and the third switch valve (4), conveying liquid hydrogen to the liquid hydrogen booster pump (6), and boosting the liquid hydrogen into low-temperature supercritical hydrogen;
step S130: the temperature at the inlet of the high-pressure hydrogen storage tank is controlled through the low-temperature control unit (10), and when the temperature is higher than 253K, the high-pressure hydrogen storage tank is determined and low-temperature supercritical hydrogen is stored in the corresponding high-pressure hydrogen storage tank; storing low temperature supercritical high pressure hydrogen in the low temperature high pressure hydrogen storage tank (1504) when the temperature at the high pressure hydrogen storage tank inlet is less than 253K;
step S140: the hydrogen in the high-pressure hydrogen storage tank is depressurized and then is conveyed to the hydrogen liquefier (23) through the hydrogen pipeline (20), and the hydrogen in the low-temperature high-pressure hydrogen storage tank (1504) is depressurized and then is conveyed to the hydrogen liquefier (23) through the first low-temperature high-pressure hydrogen pipeline (38);
step S150: and the hydrogen in the hydrogen liquefier (23) returns to the liquid hydrogen storage tank (1) through the second low-temperature high-pressure hydrogen pipeline (42) to finish the sequence.
The detailed operation is described in detail in embodiment 1, and is not described herein again.
The performance test method for the liquid hydrogen booster pump can realize comprehensive performance test of the outlet pressure of the liquid hydrogen booster pump of 0.3-90 MPa, the flow of 0-150 kg/h and electric power, thereby effectively evaluating the performance of the liquid hydrogen booster pump.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (17)
1. The utility model provides a liquid hydrogen booster pump capability test platform which characterized in that includes: the system comprises a liquid hydrogen storage tank (1), a first liquid hydrogen low-temperature transmission pipeline (5), a liquid hydrogen booster pump (6), a low-temperature pipeline (9), a low-temperature control unit (10), a flowmeter (11), a plurality of high-pressure hydrogen storage tanks, a hydrogen pipeline (20), a hydrogen liquefier (23), a second liquid hydrogen low-temperature transmission pipeline (26), a first low-temperature high-pressure hydrogen pipeline (38), a low-temperature high-pressure hydrogen storage tank (1504) and a second low-temperature high-pressure hydrogen pipeline (42); wherein:
the liquid hydrogen storage tank (1) is connected with the liquid hydrogen booster pump (6) through the first liquid hydrogen low-temperature transmission pipeline (5), the liquid hydrogen booster pump (6) is connected with the low-temperature control unit (10) through the low-temperature pipeline (9), the low-temperature control unit (10) is connected with the high-pressure hydrogen storage tanks, the high-pressure hydrogen storage tanks are connected with the hydrogen liquefier (23) through the hydrogen pipeline (20), the low-temperature control unit (10) is connected with the low-temperature high-pressure hydrogen storage tank (1504) through the first low-temperature high-pressure hydrogen pipeline (38), the low-temperature high-pressure hydrogen storage tank (1504) is connected with the hydrogen liquefier (23) through the second low-temperature high-pressure hydrogen pipeline (42), and the hydrogen liquefier (23) is connected with the liquid hydrogen storage tank (1) through the second liquid hydrogen low-temperature transmission pipeline (26); still be provided with first ooff valve (28) between liquid hydrogen storage tank (1) and liquid hydrogen booster pump (6), first liquid hydrogen low temperature transmission pipeline (5) still are equipped with second ooff valve (2), check valve (3) and third ooff valve (4) in proper order.
2. The liquid hydrogen booster pump performance test platform of claim 1, characterized in that the liquid hydrogen booster pump (6) employs a single-stage compression or multi-stage compression reciprocating pump, which may be in the form of a piston pump or a plunger pump.
3. The liquid hydrogen booster pump performance test platform of claim 1, wherein the low temperature control unit (10) can adopt one or more ultrahigh pressure gasifiers, or ultrahigh pressure gasifiers and heaters, or ultrahigh pressure gasifiers and heat exchangers to regulate and control the temperature of the low temperature and high pressure hydrogen at the outlet of the liquid hydrogen booster pump (6), so as to ensure that the temperatures of the plurality of high pressure hydrogen storage tanks and the inlet of the low temperature and high pressure hydrogen storage tank (1504) are in the range of 60K to 300K.
4. The liquid hydrogen booster pump performance test platform of claim 3, wherein the ultra-high pressure gasifier is made of aluminum, the ultra-high pressure gasifier is provided with a liquid inlet and a gas outlet, the ultra-high pressure gasifier is in a light pipe and fin adding mode, the pressure bearing range is up to 100MPa, and the ultra-high pressure gasifier realizes single-point temperature regulation and control of low-temperature and high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6) through one or more serial connection or multiple parallel connection modes.
5. The liquid hydrogen booster pump performance test platform of claim 4, wherein the heater is a built-in heating rod, the pressure bearing range of the heater is up to 100MPa, and accurate and continuous temperature control of the low-temperature and high-pressure hydrogen at the outlet of the liquid hydrogen booster pump (6) within the range of 33K-253K can be realized.
6. The liquid hydrogen booster pump performance test platform of claim 1, wherein the first liquid hydrogen low-temperature transmission pipeline (5) and the second liquid hydrogen low-temperature transmission pipeline (26) are kept cold in a vacuum multilayer heat insulation mode, a multilayer heat insulation material is wrapped on the outer surface of the inner pipe, a vacuum is pumped between the inner pipe and the outer pipe and is lower than Pa, and a corrugated pipe is used for stress compensation.
7. The liquid hydrogen booster pump performance test platform of claim 1, wherein the low-temperature pipeline (9), the first low-temperature high-pressure hydrogen pipeline (38) and the second low-temperature high-pressure hydrogen pipeline (42) are cooled by vacuum multi-layer heat insulation, a plurality of layers of heat insulation materials are wrapped on the outer surface of the inner pipe, a vacuum is pumped between the inner pipe and the outer pipe and is lower than Pa, and a corrugated pipe is used for stress compensation; or a single-layer pipe can be adopted, and the outside of the pipe is foamed and formed by polyurethane to play a role in heat insulation.
8. The liquid hydrogen booster pump performance test platform of claim 6 or 7, wherein the heat insulating material is a glass fiber paper and aluminum foil composite or a glass bead heat insulating material.
9. The liquid hydrogen booster pump performance test platform of claim 1, wherein the number of the plurality of high-pressure hydrogen tanks is 3, and the first high-pressure hydrogen tank (1501), the second high-pressure hydrogen tank (1502), the third high-pressure hydrogen tank (1503), the first high-pressure hydrogen tank (1501), the second high-pressure hydrogen tank (1502), and the third high-pressure hydrogen tank (1503) are sequentially recorded as normal-temperature hydrogen tanks managed by a plurality of pressure levels, when the temperature at the inlet of the high-pressure hydrogen tank is greater than 253K, the hydrogen storage pressure range of the third high-pressure hydrogen tank (1503) is 45 to 90MPa, the hydrogen storage pressure range of the second high-pressure hydrogen tank (1502) is 20 to 45MPa, and the maximum hydrogen storage pressure of the first high-pressure hydrogen tank (1501) is 20MPa.
10. The liquid hydrogen booster pump performance test platform of claim 1, wherein the first high-pressure hydrogen storage tank (1501), the second high-pressure hydrogen storage tank (1502) and the third high-pressure hydrogen storage tank (1503) are connected in parallel, the third high-pressure hydrogen storage tank (1503) delivers hydrogen to the second high-pressure hydrogen storage tank (1502) through a pressure reducing valve, the second high-pressure hydrogen storage tank (1502) delivers hydrogen to the first high-pressure hydrogen storage tank (1501) through a pressure reducing valve, and the first high-pressure hydrogen storage tank (1501) delivers hydrogen to the hydrogen liquefier (23) through the pressure reducing valve and the hydrogen pipeline (20).
11. The liquid hydrogen booster pump performance test platform of claim 10, wherein the low-temperature high-pressure hydrogen storage tank (1504) is kept cold by adopting a vacuum multi-layer heat insulation mode, a plurality of layers of heat insulation materials are wrapped on the outer surface of an inner pipe, vacuum pumping is lower than Pa between an inner vacuum interlayer and an outer vacuum interlayer, and when the temperature at the inlet of the high-pressure hydrogen storage tank is lower than 253K, the low-temperature high-pressure hydrogen storage tank (1504) can realize low-temperature high-pressure hydrogen storage with the pressure of 90MPa at most.
12. The liquid hydrogen booster pump performance test platform of claim 1, wherein the hydrogen liquefier (23) takes the form of multiple liquefaction cycles: the method comprises a Linde-Hampson hydrogen liquefaction cycle with precooling, a helium expansion refrigeration hydrogen liquefaction cycle with precooling of liquid nitrogen or mixed working medium, or a hydrogen expansion refrigeration liquefaction cycle with precooling of liquid nitrogen or mixed working medium or a liquid nitrogen-level expander.
13. The liquid hydrogen booster pump performance test platform of claim 1, wherein a thermometer and a pressure measurement unit are further disposed on the first liquid hydrogen low-temperature transmission pipeline (5) and the low-temperature pipeline (9).
14. The liquid hydrogen booster pump performance test platform of claim 13, wherein a flow meter (11) is further arranged on a pipeline between the low temperature control unit (10) and the plurality of high pressure hydrogen storage tanks, the flow meter (11) is used for testing the flow rate of low temperature high pressure hydrogen, and the flow meter (11) adopts a plurality of parallel sectional type flow meters, so that the flow rate measurement of low temperature high pressure hydrogen with different range accuracy is met.
15. The liquid hydrogen booster pump performance test platform of claim 14, wherein an electric power measurement unit (31) is further connected to the liquid hydrogen booster pump (6) for measuring the power of the liquid hydrogen booster pump (6).
16. The liquid hydrogen booster pump performance test platform of claim 15, further comprising a data acquisition unit (37), wherein the thermometer, the pressure measurement unit, the flow meter (11), and the electric power measurement unit (31) are all connected to the data acquisition unit (37).
17. A method of testing a liquid hydrogen booster pump performance test platform according to any one of claims 1 to 16, comprising the steps of:
opening an outlet valve (28) of the liquid hydrogen storage tank (1), and precooling and cooling each pipeline of the liquid hydrogen booster pump (6) and the low-temperature high-pressure hydrogen transmission pipeline (9) along the way by adopting low-temperature saturated hydrogen;
after precooling is finished, the outlet valve (28) is closed, the second switch valve (2), the one-way valve (3) and the third switch valve (4) are opened, liquid hydrogen is conveyed to the liquid hydrogen booster pump (6), and the liquid hydrogen is boosted to be low-temperature high-pressure hydrogen;
the temperature at the inlet of the high-pressure hydrogen storage tank is controlled through the low-temperature control unit (10), and when the temperature is higher than 253K, the high-pressure hydrogen storage tank is determined and low-temperature supercritical hydrogen is stored in the high-pressure hydrogen storage tank; storing low temperature supercritical hydrogen in the low temperature high pressure hydrogen storage tank (1504) when the temperature at the high pressure hydrogen storage tank inlet is less than 253K;
the hydrogen in the high-pressure hydrogen storage tank is depressurized and then is conveyed to the hydrogen liquefier (23) through the hydrogen pipeline (20), and the hydrogen in the low-temperature high-pressure hydrogen storage tank (1504) is depressurized and then is conveyed to the hydrogen liquefier (23) through the first low-temperature high-pressure hydrogen pipeline (38);
and the hydrogen in the hydrogen liquefier (23) returns to the liquid hydrogen storage tank (1) through the second low-temperature high-pressure hydrogen pipeline (42) to complete the sequence.
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