CN114624286A - High-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption - Google Patents
High-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption Download PDFInfo
- Publication number
- CN114624286A CN114624286A CN202210337587.XA CN202210337587A CN114624286A CN 114624286 A CN114624286 A CN 114624286A CN 202210337587 A CN202210337587 A CN 202210337587A CN 114624286 A CN114624286 A CN 114624286A
- Authority
- CN
- China
- Prior art keywords
- liquid
- liquid hydrogen
- storage tank
- hydrogen storage
- inner container
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000007788 liquid Substances 0.000 title claims abstract description 222
- 239000001257 hydrogen Substances 0.000 title claims abstract description 134
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 134
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000012360 testing method Methods 0.000 title claims abstract description 53
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000001704 evaporation Methods 0.000 claims description 12
- 230000008020 evaporation Effects 0.000 claims description 11
- 239000012071 phase Substances 0.000 claims description 8
- 239000011555 saturated liquid Substances 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 5
- 239000011810 insulating material Substances 0.000 claims description 3
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000013526 supercooled liquid Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims 1
- 238000011056 performance test Methods 0.000 abstract description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 5
- 239000000446 fuel Substances 0.000 description 4
- 150000002431 hydrogen Chemical class 0.000 description 4
- 238000005984 hydrogenation reaction Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 229910000963 austenitic stainless steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000306 component Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004200 deflagration Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a high-safety liquid hydrogen storage tank testing system and method for saving liquid hydrogen consumption, which are used for testing a liquid hydrogen storage tank, wherein the liquid hydrogen storage tank comprises an outer container and an inner container, a liquid inlet pipeline, a liquid discharge pipeline and a gas discharge pipeline which are communicated with the outside are arranged in the inner container, and the testing system comprises a liquid discharge inner container and a signal acquisition pipeline which are arranged in the inner container; the lower part of the liquid drainage inner container is connected with the wall surface of the inner container through a plurality of inner container supports; the signal acquisition pipeline extends from the inside of the inner container to the outside of the outer container and then is connected with the first thermometer and the liquid level meter, and the exhaust pipeline is provided with a second thermometer and a pressure transmitter at the outside of the outer container; the first thermometer, the pressure transmitter, the liquid level meter and the second thermometer are all connected with a control room computer. By using the method and the device, the consumption of the liquid hydrogen during the test of the liquid hydrogen storage tank can be reduced, and the performance test of the liquid hydrogen storage tank is ensured.
Description
Technical Field
The invention relates to the field of low-temperature medium storage, in particular to a high-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption.
Background
At present, the storage, transportation and filling links of hydrogen are used as the middle part of hydrogen energy utilization, and are one of the bottlenecks of large-scale application of the hydrogen energy industry. The fuel cell automobile at home and abroad basically adopts a relatively mature high-pressure gaseous hydrogen storage technology, but the high-pressure gaseous hydrogen storage density is low, the risks of easy leakage, high explosion energy release and the like exist, and compared with the prior art, the liquefied hydrogen storage technology is considered to be a good method for solving the large-scale hydrogen storage and transportation.
At present, the liquefied hydrogen storage technology is mainly applied to the field of aerospace military industry, and as the launch of a space rocket is a specific requirement, the liquid hydrogen has the advantages of small capacity, centralized use and short storage time, and is different from the conditions of urbanization and high-frequency use of a civil fuel cell automobile hydrogenation station. Meanwhile, the difference of the civil hydrogen storage equipment in the aspects of equipment reliability, transportation cost and safety requirements is large, the attack of related technologies needs to be developed, and the bottleneck problem of large-scale civil liquid hydrogen storage and transportation technologies is solved.
Chinese patent publication No. CN210107039U discloses a liquid hydrogen storage type high-pressure hydrogen-charging vehicle, which includes: the system comprises a frame, wherein a liquid hydrogen storage tank, a high-pressure liquid hydrogen pump, a heat exchanger capable of enabling two media to exchange heat, a vaporizer, a high-pressure cylinder group for storing high-pressure gas hydrogen, a hydrogenation machine, a BOG heater, a first fuel cell for supplying power to a power system of a hydrogenation vehicle, a storage battery for supplying power to electrical equipment of the hydrogenation vehicle, a second fuel cell for charging the storage battery and a central controller are arranged on the frame.
Chinese patent publication No. CN110375194A discloses a thermal management system for a liquid hydrogen refueling station, where the liquid hydrogen refueling station includes a liquid hydrogen storage tank, and the thermal management system includes: the evaporation tank is connected with the liquid hydrogen storage tank and is used for storing gaseous hydrogen leaked from the liquid hydrogen storage tank; the integrated heat exchanger exchanges heat with the liquid hydrogen storage tank so as to convert liquid hydrogen in the liquid hydrogen storage tank into gaseous hydrogen; the clean energy heat energy supply device is connected with the integrated heat exchanger and supplies heat energy to the integrated heat exchanger; and the pressure regulator is respectively connected with the evaporating tank and the integrated heat exchanger and is used for pressurizing the gaseous hydrogen.
Besides the property of low temperature fluid, the liquid hydrogen has the characteristics of flammability and explosiveness of the evaporated gas (hydrogen), which leads to the problem that the test cost is less considered in the fields of military industry, aerospace and the like for ensuring the test safety, namely, the test safety is improved and the test cost is reduced. With the application of liquid hydrogen in the civil field, the usage amount of the liquid hydrogen is greatly increased, and more potential safety hazards are brought by the intrinsic property. Meanwhile, the test and use scene of the civil-oriented liquid hydrogen equipment is complex and different from the single special test and use scene of military and aerospace, and the test is finished under the severer standard.
Therefore, it is urgently needed to provide an effective method for reducing the amount of liquid hydrogen used in a liquid hydrogen storage test scheme, ensuring the performance test of a liquid hydrogen storage system, and meeting the dual requirements of test safety and test cost.
Disclosure of Invention
The invention provides a high-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption, which can reduce the liquid hydrogen consumption during the liquid hydrogen storage tank testing and ensure the realization of the liquid hydrogen storage tank performance testing.
A high-safety liquid hydrogen storage tank test system capable of saving liquid hydrogen consumption is used for testing a liquid hydrogen storage tank, the liquid hydrogen storage tank comprises an outer container and an inner container, a liquid inlet pipeline, a liquid discharge pipeline and a gas discharge pipeline which are communicated with the outside are arranged in the inner container, and the test system comprises a liquid discharge inner container and a signal acquisition pipeline which are arranged in the inner container;
the lower part of the liquid drainage inner container is connected with the wall surface of the inner container through a plurality of inner container supports;
the signal acquisition pipeline extends from the inside of the inner container to the outside of the outer container and then is connected with the first thermometer and the liquid level meter, and the exhaust pipeline is provided with a second thermometer and a pressure transmitter at the outside of the outer container; the first thermometer, the pressure transmitter, the liquid level meter and the second thermometer are all connected with a control room computer.
Based on the technical scheme, liquid hydrogen is filled into the inner container from the filling port, the liquid drainage inner container occupies a certain volume of the inner container, after a small amount of liquid hydrogen is filled, the liquid level quickly rises, and after a stable evaporation process is formed inside the system, the temperature distribution of the inner wall of the inner container and the outer wall of the outer container is the same as that of high-liquid-level liquid hydrogen in full filling and the like, so that the performance of the liquid hydrogen storage system can be tested by saving the liquid hydrogen.
Further, the liquid discharge inner container is made of stainless steel, the inner part of the liquid discharge inner container is hollow, and an opening for balancing pressure is formed in the upper part of the liquid discharge inner container.
Furthermore, four liner supports are arranged, and the lower ends of the four liner supports are welded and fixed with the wall surface of the inner container; the upper ends of two adjacent liner supports are welded and fixed with the lower part of the liquid drainage liner, and the upper ends of the other two liner supports are abutted against the lower part of the liquid drainage liner. The arrangement ensures that the liquid discharge inner container is not supported, pulled and deformed due to the shrinkage of the tank body in the liquid nitrogen cold cycle impact test.
Preferably, the vessel supports minimize heat conduction and heat leakage, and a low temperature non-metallic composite material such as G10 may be used. In order to ensure the impact toughness of the inner container and the outer container at low temperature, a face-centered cubic structure metal such as austenitic stainless steel is adopted.
In principle, the wall thickness of the liquid discharge liner is as thin as possible, and the total weight of the liquid hydrogen storage tank testing system is reduced.
The liquid hydrogen storage tank test system needs to be fully precooled before testing, the temperature reduction from 300K to 77K is realized through liquid nitrogen circulation, and the temperature reduction from 77K to 20K is realized through low-temperature hydrogen circulation. Because the triple point of nitrogen gas is higher than 20K, in order to prevent that solid-state nitrogen from forming and leading to the pipeline jam, need to manage to find time to the inner container before using the hydrogen precooling, consequently, flowing back inner bag sets up long strip form opening at the top, makes things convenient for in the inner container to manage to find time fast, the inside and outside atmospheric pressure of balanced flowing back inner bag simultaneously.
The liquid discharge inner container is used as a core component for reducing the consumption of liquid hydrogen, and must occupy the volume as large as possible, and meanwhile, as a test system, a holding space must be reserved for a measuring component, so that the end face of the inner container is a circular surface coaxial with the inner container.
The testing system comprises measuring elements such as a liquid level meter, a thermometer, a pressure meter and the like, wherein the liquid level meter is a capacitance type liquid level meter or a superconducting type liquid level meter and can be vertically installed, the thermometer is a resistance type thermometer or a silicon semiconductor type thermometer and can be installed by a patch or fastened by threads, and measuring signals of the liquid level meter, the thermometer, the pressure meter and the like are transmitted to a remote control room computer by a transmitter.
The invention also provides a test method of the liquid hydrogen storage tank, which is characterized in that the high-safety liquid hydrogen storage tank test system capable of saving the liquid hydrogen consumption comprises the following steps:
injecting liquid hydrogen from the liquid inlet pipeline, flowing through the relevant valves and entering the inner container, wherein other valves are in a closed state; the liquid level meter monitors the liquid hydrogen liquid level in the storage tank; the pressure in the gas phase area of the storage tank is monitored by a pressure gauge, and a measured pressure signal is transmitted to a control room computer by a pressure transmitter; the temperature of the gas phase area of the storage tank is measured by a first thermometer and a second thermometer, and a temperature signal is transmitted to a computer in a control room by a lead;
and the control room computer calculates the liquid hydrogen saving rate, the evaporation rate of the liquid hydrogen storage tank and the apparent thermal conductivity of the heat insulating material of the liquid hydrogen storage tank according to the liquid hydrogen liquid level, the pressure signal, the temperature signal and the size parameters of the liquid hydrogen storage tank and the liquid discharge liner.
Further, the calculation process of the liquid hydrogen saving rate is as follows:
The calculation formula of the evaporation rate of the liquid hydrogen storage tank is as follows:
wherein the content of the first and second substances,
is the evaporation rate; gamma is the corresponding latent heat of the saturated liquid under the initial pressure; delta h is sensible heat between the supercooled liquid and the saturated liquid at the initial pressure; m is the initial liquid mass of the original container; heat leakage quantity Q0Given by:
Q0＝hg2mg2+hl2ml2-(hg1mg1+hl1ml1)
wherein h isg，hlVapor phase enthalpy and liquid phase enthalpy, respectively, are obtained from the pressure vs. saturation value, and subscripts 1 and 2 respectively indicate parameters at the time before and after pressure increase.
The calculation formula of the apparent thermal conductivity of the liquid hydrogen storage tank heat-insulating material is as follows:
where Δ t is the time interval before and after boosting, AoAnd AiRespectively the outer container inner surface area and the inner container outer surface area, TaIs ambient temperature, TiThe saturation temperature corresponding to the average pressure before and after the container is pressurized.
Compared with the prior art, the invention has the following beneficial effects:
conventional liquid hydrogen storage test systems require complete filling of the inner vessel if the performance of the storage system is tested. The hydrogen has the characteristics of easy diffusion, low ignition energy and easy explosion, the deflagration limit of the hydrogen is about 4 to 75 percent, and the hydrogen is a chemical substance with dangerous property; meanwhile, liquid hydrogen is mainly applied to the field of space launch, and the industry of civil application ends is not perfect, so that the purchasing cost of the liquid hydrogen is high. The inner container structure provided by the invention can greatly occupy the volume of the inner container storage tank, and the performance test of the liquid hydrogen storage system can be realized by using less liquid hydrogen, so that the test expense is greatly reduced, and the test safety is improved.
Drawings
Fig. 1 is a schematic structural diagram of a high-safety liquid hydrogen storage tank test system for saving liquid hydrogen consumption according to embodiment 1 of the present invention;
FIG. 2 is an axial sectional view of the drain liner of example 1;
FIG. 3 is a graph of the volume of the inner container occupied by the inner container in relation to the liquid level in example 1;
fig. 4 is a schematic structural diagram of another high-safety liquid hydrogen storage tank testing system for saving liquid hydrogen consumption in embodiment 2 of the present invention.
Detailed Description
The invention will be described in further detail below with reference to the drawings and examples, which are intended to facilitate the understanding of the invention without limiting it in any way.
Example 1
As shown in FIG. 1, a high-safety liquid hydrogen storage tank testing system for saving the consumption of liquid hydrogen is used for testing a liquid hydrogen storage tank, and the liquid hydrogen storage tank comprises an outer container 1, an inner container 2 and a rupture disk 14 for preventing excessive pressure. In this embodiment, the testing system is of a horizontal structure, a liquid inlet pipeline 6, a liquid discharge pipeline 7 and an exhaust pipeline 8 which are communicated with the outside are arranged in the inner container 2, and the testing system comprises a liquid discharge inner container 3 and a signal acquisition pipeline 5 which are arranged in the inner container 2. Each pipeline is correspondingly provided with a valve combination (such as a stop valve, a safety valve, a one-way valve and the like).
The signal acquisition pipeline 5 extends from the inside of the inner container 2 to the outside of the outer container 1 and then is connected with a first thermometer 9 and a liquid level meter 11, and the exhaust pipeline 8 is provided with a second thermometer 12 and a pressure transmitter 10 at the outside position of the outer container 1; the first thermometer 9, the pressure transmitter 10, the liquid level meter 11 and the second thermometer 12 are all connected with a control room computer.
As shown in fig. 1 and 2, in the present embodiment, the lower portion of the drain liner 3 is connected to the wall surface of the inner container 2 via four liner supports 4. The lower ends of the four liner supports 4 are welded and fixed with the wall surface of the inner container 2, the upper ends of two adjacent liner supports 4 are welded and fixed with the lower part of the liquid drainage liner 3, and the upper ends of the other two liner supports 4 are abutted against the lower part of the liquid drainage liner 3.
The liquid discharge inner container 3 is made of stainless steel, the interior of the liquid discharge inner container is hollow, and an opening 13 for balancing pressure is formed in the upper portion of the liquid discharge inner container. The two end faces of the liquid drainage inner container 3 are circular faces coaxial with the inner container 2.
When filling begins, the filling gun and the liquid inlet c are connected, the valve of the liquid inlet pipeline 6 is opened, liquid hydrogen is filled into the inner container 2 from the liquid inlet c, after the liquid level is immersed in the liner support 4, the liquid discharging liner 3 discharges the liquid hydrogen until the liquid hydrogen is filled to the corresponding height of the specified filling rate of the test system, the liquid level height is monitored by the liquid level meter 11, and then the valve of the liquid inlet pipeline 6 is closed, and the liquid filling gun is pulled out.
The method of testing a liquid hydrogen tank is described below by way of example for a tank having an internal volume of about 500L.
The length of a straight cylinder in the storage tank is L1 mm, the diameter D1 mm is 700mm, a straight edge Ls is 25mm, and the storage tank is a standard elliptical end socket; the length of the inner container is 800mm, the diameter of the side circle is 600 mm, and the inner container are coaxially arranged. The storage tank volume at this time is:
the relationship between the fill volume and the liquid level height is determined by the following equation:
wherein:
filling rate,%; vtankIs the volume of the inner container, m3(ii) a a. b is the length of the elliptic major and minor semi-axes of the end socket, m; l ═ L1+Ls。
As shown in fig. 3, the relationship between the volume of the inner container occupied by the inner container and the height of the liquid level is determined by the following formula:
h1+h+(D1-Di)/2＝D1
wherein: h is the height of the liquid level in m; v is the volume occupied by the inner container and is larger than the inner m3(ii) a Theta is half of the angle of the corresponding fan shaped minor arc, unit rad.
Table 1 below shows the height and the volume saving of liquid hydrogen in volume percent for different filling rates.
TABLE 1
| Filling rate | Height (m) | Saving liquid hydrogen |
| 50％ | 0.35 | 45.44％ |
| 60％ | 0.4035 | 46.43％ |
| 70％ | 0.4587 | 47.10％ |
| 80％ | 0.5177 | 47.51％ |
| 90％ | 0.5857 | 47.59％ |
The evaporation rate of the container can be calculated by a boost method, and the formula is as follows:
before boosting:
shaking up the container after boosting:
Vg，Vlthe volumes of the gas phase and the liquid phase are respectively obtained by calculation according to the height of the liquid level; ρ is a unit of a gradientg，ρlDensity of gas phase and liquid phase respectively; v is the actual volume of the container; m is0Is the total mass of the fluid.
The amount of heat leakage is given by:
Q0＝hg2mg2+hl2ml2-(hg1mg1+hl1ml1)
wherein h isg，hlThe enthalpy values of the gas phase and the liquid phase are respectively obtained by the saturation value corresponding to the pressure.
The emptying liner is fixed in the liquid, so that the liner does not influence the liquid distribution, namely, the temperature field of the wall surface of the inner container is not changed no matter whether the liner exists or not, and the heat leakage quantity of the test system containing the emptying liner is considered to be the same as that of the original system. Thus, the evaporation rate can be derived from the following formula:
wherein the content of the first and second substances,
is the evaporation rate; gamma is the corresponding latent heat of the saturated liquid under the initial pressure; delta h is sensible heat between the supercooled liquid and the saturated liquid at the initial pressure; and m is the initial liquid mass of the original container.
Calculation of average apparent thermal conductivity of container interlayer insulation for liquid hydrogen temperature zone:
where Δ t is the time interval before and after boosting, AoAnd AiAre respectively external appearanceInner surface area of the container and outer surface area of the inner container, TaIs the ambient temperature, TiThe saturation temperature corresponding to the average pressure before and after the container is pressurized.
Example 2
As an explanation of embodiment 2 of the present invention, only differences from embodiment 1 will be explained below.
The difference from embodiment 1 is that in this embodiment, the test system has a vertical structure. As shown in fig. 4, the side edges and the bottom edge of the liquid discharge liner 3 and the inner container 2 are provided with liner supports 4. Wherein, the liner support 4 on the side is fixed with the liquid discharge liner 3 and the inner container 2, and is used for preventing the radial shaking of the liquid discharge liner 3. The lower end of the inner baffle support at the bottom is fixed with the inner container 2, and the upper end of the inner baffle support is abutted against the liquid drainage liner 3, so that the liquid drainage liner 3 has a certain degree of freedom in the axial direction. The middle of the liquid discharge inner container 3 is provided with a through hole for facilitating the placement of the liquid level meter.
When filling begins, the filling gun and the liquid inlet c are connected, the valve of the liquid inlet pipeline 6 is opened, liquid hydrogen is filled into the inner container 2 from the liquid inlet c, after the liquid level is immersed in the liquid discharging inner container and the inner container connecting piece 4, the liquid discharging inner container 3 discharges the liquid hydrogen until the liquid hydrogen is filled to the corresponding height of the specified filling rate of the test system, the liquid level height is monitored by the liquid level meter 11, and then the valve of the liquid inlet pipeline 6 is closed, and the liquid filling gun is pulled out.
The embodiments described above are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions and equivalents made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (8)
1. A high-safety liquid hydrogen storage tank test system capable of saving liquid hydrogen consumption is used for testing a liquid hydrogen storage tank, the liquid hydrogen storage tank comprises an outer container (1) and an inner container (2), a liquid inlet pipeline (6), a liquid discharge pipeline (7) and a gas discharge pipeline (8) which are communicated with the outside are arranged in the inner container (2), and the high-safety liquid hydrogen storage tank test system is characterized by comprising a liquid discharge inner container (3) and a signal acquisition pipeline (5) which are arranged in the inner container (2);
the lower part of the liquid drainage liner (3) is connected with the wall surface of the inner container (2) through a plurality of liner supports (4);
the signal acquisition pipeline (5) extends from the inside of the inner container (2) to the outside of the outer container (1) and then is connected with a first thermometer (9) and a liquid level meter (11), and the exhaust pipeline (8) is provided with a second thermometer (12) and a pressure transmitter (10) at the outer position of the outer container (1); the first thermometer (9), the pressure transmitter (10), the liquid level meter (11) and the second thermometer (12) are all connected with a control room computer.
2. The high-safety liquid hydrogen storage tank testing system capable of saving liquid hydrogen consumption according to claim 1, wherein the liquid discharge liner (3) is made of stainless steel, the liquid discharge liner is hollow, and an opening (13) for pressure balance is formed in the upper portion of the liquid discharge liner.
3. The high-safety liquid hydrogen storage tank testing system capable of saving liquid hydrogen consumption according to claim 1, wherein four liner supports (4) are provided, and the lower ends of the four liner supports (4) are welded and fixed with the wall surface of the inner container (2); the upper ends of two adjacent liner supports (4) are welded and fixed with the lower part of the liquid drainage liner (3), and the upper ends of the other two liner supports (4) are abutted against the lower part of the liquid drainage liner (3).
4. The high-safety liquid hydrogen storage tank testing system capable of saving liquid hydrogen consumption according to claim 1, wherein two end faces of the liquid discharge liner (3) are circular faces coaxial with the inner container.
5. A method for testing a liquid hydrogen storage tank, which is characterized in that the high-safety liquid hydrogen storage tank testing system for saving liquid hydrogen consumption according to any one of claims 1 to 4 is adopted, and comprises the following steps:
injecting liquid hydrogen from the liquid inlet pipeline (6), flowing through the related valves and entering the inner container (2), wherein other valves are in a closed state; the liquid level meter (11) monitors the liquid hydrogen liquid level in the storage tank; the pressure of the gas phase area of the storage tank is monitored by a pressure gauge, and a measured pressure signal is transmitted to a control room computer by a pressure transmitter (10); the temperature of the gas phase area of the storage tank is measured by a first thermometer (9) and a second thermometer (12), and a temperature signal is transmitted to a computer in a control room by a lead;
and the control room computer calculates the liquid hydrogen saving rate, the evaporation rate of the liquid hydrogen storage tank and the apparent thermal conductivity of the heat insulating material of the liquid hydrogen storage tank according to the liquid hydrogen liquid level, the pressure signal, the temperature signal and the size parameters of the liquid hydrogen storage tank and the liquid discharge liner.
6. The method for testing a liquid hydrogen storage tank according to claim 5, wherein the liquid hydrogen saving rate is calculated as follows:
step 1, calculating liquid level heights h corresponding to different filling rates;
step 2, calculating the volume V of the liquid at different liquid level heights h;
step 3, calculating the volume V occupied by the emptying liner under different liquid level heights hi；
Step 4, the liquid hydrogen saving rate is equal to Vi/V。
7. The method for testing the liquid hydrogen storage tank according to claim 5, wherein the evaporation rate of the liquid hydrogen storage tank is calculated by the following formula:
wherein the content of the first and second substances,
is the evaporation rate; gamma is the corresponding latent heat of the saturated liquid under the initial pressure; delta h is sensible heat between the supercooled liquid and the saturated liquid at the initial pressure; m is the initial liquid mass of the original container; heat leakage quantity Q0Given by:
Q0＝hg2mg2+hl2ml2-(hg1mg1+hl1ml1)
wherein the content of the first and second substances,hg，hlthe enthalpy values of the gas phase and the liquid phase are obtained from the saturation values corresponding to the pressure, and subscripts 1 and 2 respectively represent parameters at the time before and after the pressure rise.
8. The method for testing the liquid hydrogen storage tank according to claim 5, wherein the calculation formula of the apparent thermal conductivity of the thermal insulation material of the liquid hydrogen storage tank is as follows:
where Δ t is the time interval before and after boosting, AoAnd AiRespectively the outer container inner surface area and the inner container outer surface area, TaIs ambient temperature, TiThe saturation temperature corresponding to the average pressure before and after the container is pressurized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210337587.XA CN114624286A (en) | 2022-03-31 | 2022-03-31 | High-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210337587.XA CN114624286A (en) | 2022-03-31 | 2022-03-31 | High-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114624286A true CN114624286A (en) | 2022-06-14 |
Family
ID=81905341
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210337587.XA Pending CN114624286A (en) | 2022-03-31 | 2022-03-31 | High-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114624286A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076593A (en) * | 2022-07-17 | 2022-09-20 | 中国石油化工股份有限公司 | Liquid hydrogen storage device with cold shield space partition |
-
2022
- 2022-03-31 CN CN202210337587.XA patent/CN114624286A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115076593A (en) * | 2022-07-17 | 2022-09-20 | 中国石油化工股份有限公司 | Liquid hydrogen storage device with cold shield space partition |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103075906B (en) | High-pressure heat-storing/or cold-storing device | |
| CN103075907B (en) | Packed bed type high pressure heat/cold storage device | |
| CN103470946B (en) | High-pressure supercritical helium storage tank | |
| CN111578570A (en) | System for acquiring large supercooling degree of liquid oxygen by utilizing liquid hydrogen cooling capacity | |
| Zhao et al. | Review on studies of the emptying process of compressed hydrogen tanks | |
| US7434407B2 (en) | No-vent liquid hydrogen storage and delivery system | |
| CN114704765B (en) | Hydrogen liquefaction and boil-off gas recondensation system based on cryocooler | |
| CN114624286A (en) | High-safety liquid hydrogen storage tank testing system and method capable of saving liquid hydrogen consumption | |
| CN114046442A (en) | Multi-platform compression type hydrogen storage device and manufacturing method thereof | |
| CN103836333A (en) | Thermal-isolation conversion refrigerating device for parahydrogen | |
| CN113030151B (en) | Device and method for testing liquefaction rate of low-temperature gas liquefaction device | |
| CN207599332U (en) | A kind of spherical tank device for being used to store cryogenic liquid | |
| CN112350267A (en) | Superconductive energy pipeline terminal thermostat | |
| CN203163568U (en) | Packed bed type high-pressure heat or cold accumulation device | |
| CN115076592B (en) | BOG control system and method for liquid hydrogen storage tank and liquid hydrogen storage tank | |
| CN114688445B (en) | Hydrogen liquid hydrogen hydrogenation station | |
| CN113828254B (en) | Isothermal catalytic conversion equipment and method for para-hydrogen | |
| CN210800701U (en) | LNG storage tank | |
| CN114087522A (en) | Zero-loss liquid hydrogen storage and transportation and hydrogenation system, equipment and transport vehicle | |
| CN216224296U (en) | Orthosteric hydrogen conversion device | |
| KR20130043255A (en) | Efficient lng storage tank using waste heat | |
| CN213846220U (en) | Superconductive energy pipeline terminal thermostat | |
| CN219800931U (en) | Direct-cooling type hydrogen explosion-proof temperature control system | |
| CN219063082U (en) | Pump-free liquid hydrogen filling system with automatic precooling and metering control functions | |
| CN218762676U (en) | Cold shield device for ultralow-temperature liquid storage container |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |