CN111006124B - Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen - Google Patents

Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen Download PDF

Info

Publication number
CN111006124B
CN111006124B CN201911418464.3A CN201911418464A CN111006124B CN 111006124 B CN111006124 B CN 111006124B CN 201911418464 A CN201911418464 A CN 201911418464A CN 111006124 B CN111006124 B CN 111006124B
Authority
CN
China
Prior art keywords
storage tank
liquid
liquid nitrogen
hydrogen storage
tank body
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.)
Active
Application number
CN201911418464.3A
Other languages
Chinese (zh)
Other versions
CN111006124A (en
Inventor
邱利民
方松
王凯
植晓琴
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN201911418464.3A priority Critical patent/CN111006124B/en
Publication of CN111006124A publication Critical patent/CN111006124A/en
Application granted granted Critical
Publication of CN111006124B publication Critical patent/CN111006124B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
    • F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/02—Special adaptations of indicating, measuring, or monitoring equipment
    • F17C13/026—Special adaptations of indicating, measuring, or monitoring equipment having the temperature as the parameter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C13/00—Details of vessels or of the filling or discharging of vessels
    • F17C13/12—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures
    • F17C13/123—Arrangements or mounting of devices for preventing or minimising the effect of explosion ; Other safety measures for gas bottles, cylinders or reservoirs for tank vehicles or for railway tank wagons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/01—Shape
    • F17C2201/0104—Shape cylindrical
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/054—Size medium (>1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2201/00—Vessel construction, in particular geometry, arrangement or size
    • F17C2201/05—Size
    • F17C2201/056—Small (<1 m3)
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2203/00—Vessel construction, in particular walls or details thereof
    • F17C2203/03—Thermal insulations
    • F17C2203/0375—Thermal insulations by gas
    • F17C2203/0383—Air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/03—Control means
    • F17C2250/032—Control means using computers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/06—Controlling or regulating of parameters as output values
    • F17C2250/0605—Parameters
    • F17C2250/0631—Temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
    • F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
    • F17C2250/00—Accessories; Control means; Indicating, measuring or monitoring of parameters
    • F17C2250/07—Actions triggered by measured parameters
    • F17C2250/072—Action when predefined value is reached
    • 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 discloses a vehicle-mounted liquid hydrogen storage tank integration device integrating fire extinguishing and heat preservation based on liquid nitrogen, which belongs to the technical field of vehicle-mounted liquid hydrogen storage tanks and comprises a liquid hydrogen storage tank, a liquid nitrogen storage tank and a fire prevention and extinguishing device; the outer tank body of the liquid hydrogen storage tank is connected with the inner tank body of the liquid nitrogen storage tank by adopting a cold bridge, so that the outer tank body of the liquid hydrogen storage tank is at a temperature close to the temperature of liquid nitrogen, and the radiation heat exchange between the inner tank body and the outer tank body of the liquid hydrogen storage tank is reduced to the greatest extent; simultaneously, the liquid nitrogen storage tank is connected with the fire prevention and extinguishing module, when hydrogen reveals that the hydrogen concentration that the appearance monitored out on-vehicle confined space surpassed safe allowable value, the fire prevention and extinguishing module sets up from pressure boost bypass branch road, through pressure boost vaporizer and atomizing spray gun, with the quick atomizing of the liquid nitrogen in the liquid nitrogen storage tank spout to confined space, utilize the gaseous expansion volume of liquid nitrogen big, the heat absorption height of liquid nitrogen, arrange the hydrogen in confined space rapidly and extrude and make its cooling to reach the fire prevention purpose of on-vehicle liquid hydrogen storage tank.

Description

Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen
Technical Field
The invention relates to the technical field of vehicle-mounted liquid hydrogen storage tanks, in particular to a vehicle-mounted liquid hydrogen storage tank integrated device integrating fire extinguishing and heat preservation based on liquid nitrogen.
Background
The transportation industry has been the main increase of global energy consumption, so that various large vehicle enterprises have no way to accelerate the development of new energy vehicles, such as pure electric vehicles, hybrid electric vehicles, fuel cell vehicles and the like. Wherein the hydrogen fuel cell vehicle has CO2Zero emission, high efficiency, long endurance, short energy supplementing time, wide fuel source and the like, and is gradually regarded as a great direction for the development of new energy automobiles in the future.
It is a conservative estimate that the market hold for hydrogen fuel cell vehicles by 2030 will be as high as a million, meaning that the market demand for hydrogen is also growing, which will create a significant challenge to the hydrogen storage capacity of transport tankers serving the hydrogen stations. In addition, the vehicle-mounted hydrogen storage device is one of the technical difficulties in the design of the hydrogen fuel cell automobile, and directly determines the endurance mileage, the running cost and the safety of the automobile. Therefore, the design of the vehicle-mounted hydrogen storage tank is a key for the overall popularization of the hydrogen energy automobile in the future. At present, the feasible vehicle-mounted hydrogen storage technology mainly comprises modes of high-pressure gaseous hydrogen storage, metal hydride hydrogen storage, low-temperature liquid hydrogen storage and the like. The high-pressure gaseous hydrogen storage technology compresses hydrogen to a high-pressure state and stores the hydrogen in a steel gas storage tank, and the pressure of the hydrogen can reach 70 MPa. The high-pressure gaseous hydrogen storage device has mature technology and low cost, but the unit hydrogen storage density is smaller, so the mileage range of a vehicle is limited when the device is used for being carried on the vehicle, and the pressure in the tank is high, so the device has larger potential safety hazard. The hydrogen storage of metal hydride is carried out by reacting metal with hydrogen to form compound, heating for hydride to decompose and educe out hydrogen. Compared with a high-pressure hydrogen storage mode, the metal hydride hydrogen storage is safer, the volume hydrogen storage density is higher, but the technology is still not mature, the hydrogen storage material is expensive, the weight of the hydrogen storage device is large, the hydrogen release rate is slow, and the large-scale commercial application of the hydrogen storage device on a vehicle is limited. The low-temperature liquid hydrogen storage is to liquefy hydrogen and store the liquefied hydrogen in a low-temperature heat-insulating container. Compared with normal pressure hydrogen, the volume of the hydrogen storage tank is reduced by hundreds of times, and high-density hydrogen storage is realized. The low-temperature heat insulation technology is mature, and the low-temperature liquid hydrogen storage pressure is low, so that the method is particularly suitable for long-endurance vehicle-mounted application and is a hydrogen storage mode with great application prospect.
Although the safety of the vehicle-mounted low-temperature liquid hydrogen storage mode is high, the combustion and explosion accidents caused by hydrogen leakage still need to be prevented. Compared with other fuels, the hydrogen has the characteristics of small relative molecular mass, flammability, explosiveness and easy diffusion, the combustion range of the hydrogen and air mixture is 4-75%, and the minimum ignition energy is only 0.019 mJ. However, the potential factor of explosion caused by leakage of the vehicle-mounted liquid hydrogen storage tank is very large. For example, the tank body is cracked or perforated due to factors such as vacuum heat insulation failure of the tank body, aging corrosion of the tank body and the like; the pressure of the tank body is overhigh due to the fault of a system pressure relief system; the welding interface of the pipeline and the valve is cracked due to the violent vibration of the vehicle; structural deformation or seal damage due to external mechanical impact on the vehicle; and so on. In the event of a liquid hydrogen leak, there are many possible ignition sources within the on-board environment. For example, when a vehicle is in a collision accident or jolts, collision friction between system equipment generates electric sparks; when the hydrothermal management system breaks down, the surface temperature of the equipment rises; when the anti-static device is damaged, static electricity is generated among system equipment; and so on. These potential factors are all unavoidable, and therefore an effective and fast-response fire protection and control system is needed to reduce the risk of hydrogen leakage and explosion as much as possible.
Low-temperature heat insulation is one of the technical difficulties faced by the design of low-temperature liquid hydrogen storage tanks. When the container has poor heat insulating properties, the evaporation loss of liquid hydrogen tends to be accelerated, resulting in an increase in the pressure in the tank. When the pressure of the evaporated hydrogen reaches the upper limit of the pressure resistance of the container, hydrogen leakage accidents may be caused, which poses safety threats to people in the vehicle in a closed space. In order to reduce the evaporation loss of the vehicle-mounted liquid hydrogen storage tank, the technology of the high-pressure low-temperature liquid hydrogen storage tank is most commonly adopted at present, and a corresponding research and development unit such as the national laboratory of Lorentlivormol in the United states is adopted. Compared with the normal pressure liquid hydrogen storage tank, the high pressure liquid hydrogen storage tank has higher hydrogen storage density, but the safety and the cost are also more outstanding. Therefore, how to reduce the evaporation rate of the vehicle-mounted normal-pressure liquid hydrogen storage tank as much as possible still is one of the current development directions of the vehicle-mounted liquid hydrogen storage tank.
Disclosure of Invention
The invention aims to provide a vehicle-mounted liquid hydrogen storage tank integration device integrating fire extinguishing and heat preservation based on liquid nitrogen, which can reduce the high evaporation rate of the existing vehicle-mounted liquid hydrogen storage tank and prevent explosion caused by hydrogen leakage in a closed space.
In order to achieve the purpose, the vehicle-mounted liquid hydrogen storage tank integrated device integrating fire extinguishing and heat preservation based on liquid nitrogen comprises a liquid hydrogen storage tank, a liquid nitrogen storage tank and a fire preventing and extinguishing device based on liquid nitrogen;
the liquid hydrogen storage tank comprises an inner-layer tank body, an outer-layer tank body and a heat-insulating cold shield; a liquid hydrogen level meter and a pressure gauge are arranged in the inner tank body, and electric remote signals of the liquid hydrogen level meter and the pressure gauge are connected with a vehicle-mounted computer; the liquid hydrogen storage tank is also provided with a pressure relief safety valve, a one-way exhaust valve, a one-way liquid discharge valve and a one-way liquid charging valve, wherein the pressure relief safety valve and the one-way exhaust valve are connected to the top of the gas phase region through a guide pipe, and the one-way liquid discharge valve and the one-way liquid charging valve are communicated to the bottom of the liquid phase region; valves of the liquid hydrogen storage tank are all arranged in an openable heat-insulating cold shield box, a vacuumizing port is arranged in the heat-insulating cold shield box, and a hydrogen leakage monitor is arranged at the upper part of the heat-insulating cold shield box;
the liquid nitrogen storage tank comprises an inner tank body and an outer tank body; a liquid nitrogen level meter and a pressure gauge are arranged in the inner tank body, and electric remote transmission signals of the liquid nitrogen level meter and the pressure gauge are also connected to a vehicle-mounted computer; a safety pressure relief valve, a stop air valve, a one-way liquid charging valve and a one-way liquid discharging valve are arranged outside the liquid nitrogen storage tank, wherein the one-way liquid discharging valve is connected to the liquid nitrogen fire prevention and extinguishing device;
the fire prevention and extinguishing device comprises a liquid nitrogen pressurization gasifier, a check valve, a pressure regulating valve and an atomization spray gun which are arranged in sequence; a self-pressurization bypass branch is arranged between the check valve and the pressure regulating valve and is connected to the stop air valve.
Above-mentioned technical scheme both can utilize liquid nitrogen gasification's quick expansion characteristic when liquid hydrogen takes place to reveal, will reveal the hydrogen dilution of dew point and extrude the airtight space of vehicle, can also reduce the evaporation rate of liquid hydrogen through the self cold energy of liquid nitrogen.
Liquid nitrogen, as a cryogenic fluid, has a large latent heat of vaporization, rapidly expands in volume after vaporization, and the nitrogen gas obtained by vaporization is a non-flammable inert gas. Therefore, the liquid nitrogen is an ideal fire extinguishing agent and is expected to be used in a fire preventing and extinguishing system of a vehicle-mounted liquid hydrogen storage tank. In addition, the liquid nitrogen temperature under normal pressure can reach 77.7K, certain compensation cold quantity can be provided for the liquid hydrogen storage tank, and the evaporation rate of the liquid hydrogen storage tank is reduced. The double advantages of the liquid nitrogen can provide certain safety guarantee for the large-scale application of the vehicle-mounted liquid hydrogen storage tank.
As a specific scheme, the heat-insulating cold shield of the liquid hydrogen storage tank and the outer tank body of the liquid nitrogen storage tank are integrated together. Preferably, the outer layer tank body of the liquid hydrogen storage tank is connected with the inner layer tank body of the liquid nitrogen storage tank through a copper cold bridge. The heat-insulating cold shield of the liquid hydrogen storage tank is integrated with the outer tank body of the liquid nitrogen storage tank, so that the tank body is tidier. The preferred integral type liquid hydrogen storage tank adopts the damping base, reduces the vibration deformation of cold bridge.
As another specific scheme, the invention adopts a separable series connection structure, and the heat-insulating cold shield of the liquid hydrogen storage tank and the outer tank body of the liquid nitrogen storage tank are two independent tank bodies; the outer layer tank body of the liquid hydrogen storage tank is connected with the inner layer tank body of the liquid nitrogen storage tank through a copper cold bridge with a vacuum movable joint.
Preferably, the vacuum movable joint is welded and fixed on the two copper cold bridges, the outer part of the vacuum movable joint is provided with threads, and the front end of the vacuum movable joint is provided with a sealing ring; coating low-temperature heat-conducting silicone grease on the contact end of the copper cold bridge; a layer of cold insulation pipe wraps the outer portion of the copper cold bridge, a vacuum porous heat insulation material is adopted in the pipe, and the pipe is supported by a set point.
The detachable serial arrangement is more convenient to disassemble and assemble; the outer layer tank body of the liquid hydrogen storage tank is connected with the inner layer tank body of the liquid nitrogen storage tank through two sections of cold bridges, the cold bridges are communicated through vacuum movable joints, and the outside of each cold bridge is wrapped by a vacuum cold insulation pipe. The preferred detachable liquid hydrogen storage tank adopts integral type vibration damping mount, reduces the vibration deformation of cold bridge.
As another specific scheme, the invention adopts a concentric layered structure, and the liquid hydrogen storage tank is positioned in the liquid nitrogen storage tank; and a point support is arranged between the outer layer tank body of the liquid hydrogen storage tank and the inner layer tank body of the liquid nitrogen storage tank.
Preferably, a vacuum multilayer heat insulation is adopted between the inner layer tank body and the outer layer tank body of the liquid hydrogen storage tank, and an annular reinforcing rib support is arranged; a vacuum multi-layer heat insulation is adopted between the inner tank body and the outer tank body of the liquid nitrogen storage tank, and an annular reinforcing rib support is adopted.
The concentric layered structure has a more compact structure and a better cold shield effect; the liquid hydrogen storage tank integration device comprises four layers of tank bodies, wherein the innermost layer of tank body stores liquid hydrogen, the second layer of tank body from inside to outside is a pressure-bearing cold screen, liquid nitrogen is stored between the second layer of tank body and the third layer of heat-insulating tank body, the outermost layer of tank body is a heat-insulating cold screen, and vacuum heat insulation is adopted between layers.
Preferably, when the concentration of hydrogen in the vehicle-mounted closed space is higher than a safety allowable value, the hydrogen leakage monitor transmits a leakage electric transmission signal to a vehicle-mounted computer, and the vehicle-mounted computer sends a starting instruction of the fire prevention and extinguishing device; the liquid nitrogen stop air valve, the one-way liquid discharge valve, the check valve and the pressure regulating valve are all opened; because a certain pressure is kept in the liquid nitrogen tank, liquid nitrogen spontaneously flows out from the one-way liquid discharge valve to the liquid nitrogen pressurization gasifier, and the gasification rate of the liquid nitrogen is higher than 70%; after passing through the check valve, one part of pressurized and gasified liquid nitrogen flows to the atomizing spray gun from the pressure regulating valve, hydrogen in the closed space is extruded, diluted and cooled, and the other part of pressurized and gasified nitrogen flows back to the liquid nitrogen storage tank through the self-pressurizing bypass branch pipe and the stop air valve, so that enough self-flowing pressure in the tank is ensured.
Compared with the prior art, the invention has the beneficial effects that:
the vehicle-mounted liquid hydrogen storage tank integrated device is provided with a liquid nitrogen cold insulation and fire prevention and extinguishing device on the basis of the existing low-temperature liquid hydrogen storage tank; the liquid hydrogen outer tank is at the temperature of liquid nitrogen by connecting the liquid nitrogen inner tank with the liquid hydrogen outer tank in a cold bridge mode, and the radiation heat exchange between the liquid hydrogen storage tank inner tank and the liquid hydrogen outer tank is reduced. According to the following radiant heat exchange formula:
Figure BDA0002351767290000051
in the formula, ToAnd TiThe temperatures of the outer layer tank body and the inner layer tank body of the liquid hydrogen storage tank are respectively. Assuming the temperature T of the outer tanko,LNThe temperature of the inner tank body fluctuates between 77.7K and 150K, the temperature difference between the temperature of the inner tank body and the liquid hydrogen temperature is 5K, and when the relative environment temperature is 25 ℃, the device of the invention is adopted, the reduction rate of the radiation heat exchange quantity is
Figure BDA0002351767290000052
In addition, the liquid nitrogen fire prevention and extinguishing device can rapidly spray a large amount of nitrogen when liquid hydrogen leaks, so that the hydrogen is extruded out of the closed space, the concentration of the hydrogen is reduced, the materialized liquid nitrogen can be rapidly evaporated, the temperature of the closed space is reduced, and the purpose of fire prevention and extinguishing in the vehicle-mounted closed space is achieved. The bypass branch of the air valve of the fire-fighting device is combined with a pressurization gasifier, so that the liquid-discharging self-pressurization effect of the liquid nitrogen tank can be achieved.
Drawings
FIG. 1 is a schematic view of an integrated series integrated structure of a vehicle-mounted liquid hydrogen storage tank integrated device based on integration of fire extinguishing and heat preservation by liquid nitrogen in embodiment 1 of the invention;
FIG. 2 is a schematic diagram of a detachable series integrated structure of a vehicle-mounted liquid hydrogen storage tank integrated device based on integration of fire extinguishing and heat preservation by liquid nitrogen in embodiment 2 of the invention;
FIG. 3 is a schematic structural diagram of the material of the outer tank body of the liquid hydrogen storage tank in the embodiment 1 and the embodiment 2 of the invention;
FIG. 4 is a schematic cross-sectional view of a cold bridge loose joint in embodiment 2 of the present invention;
fig. 5 is a schematic diagram of a concentric layered integrated structure of a vehicle-mounted liquid hydrogen storage tank integrated device based on integration of fire extinguishing and heat preservation by liquid nitrogen in embodiment 3 of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be further described with reference to the following embodiments and accompanying drawings.
Example 1
Referring to fig. 1, the vehicle-mounted liquid hydrogen storage tank integrated device based on the integration of fire extinguishing and heat preservation of liquid nitrogen of the embodiment adopts an integrated series integrated structure, and comprises a liquid hydrogen storage tank 01, a liquid hydrogen storage tank valve cold shield case 02, a liquid nitrogen storage tank 03 and a fire prevention and extinguishing device 04.
Wherein, the liquid hydrogen storage tank 01 is provided with an inner tank body 11, an outer tank body 12 and a heat insulation cold shield 13 from inside to outside in sequence. The inner tank 11 contains a gas phase region 14 and a liquid phase region 15, the gas phase region 14 contains gas phase hydrogen, the liquid phase region 15 contains liquid phase hydrogen, and a vacuum multilayer heat insulating material 16 is arranged among the inner tank 11, the outer tank 12 and the heat insulating cold shield 13 and adopts a reinforcing rib support frame 17. The inner tank 01 is internally provided with a liquid hydrogen level gauge 18 and a pressure gauge 20, and electric remote signals 19 of the liquid hydrogen level gauge and the pressure gauge are transmitted to a vehicle-mounted computer. The valve cold screen box 02 comprises a pressure gauge 20, a pressure relief safety valve 21, a one-way exhaust valve 22, a one-way liquid discharge valve 23, a one-way liquid charging valve 24, a vacuum pumping port 27 and a hydrogen leakage monitor 25 arranged at the upper part of the cold screen box; the pressure relief safety valve 21 and the one-way exhaust valve 22 are connected to the top of the gas phase region 14 through exhaust pipes, and the one-way liquid discharge valve 23 and the one-way liquid charging valve 24 are connected to the bottom of the liquid phase hydrogen 15 through liquid conveying pipes; the vacuumizing port 27 is communicated with the vacuum multilayer heat-insulating material 16 between the inner-layer tank body 11 and the outer-layer tank body 12 of the liquid hydrogen storage tank 03 and the heat-insulating cold screen 13; the hydrogen leakage monitor 25 is provided with a sensor probe 26, is close to a valve leakage-prone point and is used for monitoring the hydrogen content of the vehicle-mounted closed space.
The liquid nitrogen storage tank 03 comprises an inner layer tank body 31 and an outer layer tank body, the outer layer tank body of the embodiment is integrated with the heat insulation cold shield 13 of the liquid hydrogen storage tank 01, and the interlayer space between the inner layer tank body and the outer layer tank body forms vacuum multi-layer heat insulation through the vacuumizing port 27. The liquid level and the pressure in the liquid nitrogen storage tank 03 are monitored by a liquid nitrogen level meter 32 and a pressure gauge 33; the pressure relief safety valve 34 and the air valve 35 on the tank body are connected with the top of a gas phase area 38 of the liquid nitrogen storage tank, and the one-way liquid filling valve 36 and the one-way liquid discharging valve 37 are connected with the bottom of a liquid phase area 39.
The fire prevention and extinguishing device 04 is connected to the liquid nitrogen one-way liquid discharge valve 37 and sequentially comprises a pressurization gasifier 41, a check valve 42, a pressure regulating valve 43 and an atomization spray gun 45; a bypass branch 44 is provided after the check valve 42 and connected to the liquid nitrogen gas valve 35 for preventing self-pressurization of the liquid nitrogen in the tank during fire suppression and venting during liquid nitrogen charging.
In the embodiment, the outer tank body 12 of the liquid hydrogen storage tank is connected with the inner tank body 31 of the liquid nitrogen storage tank by adopting the cold bridge 05, so that the outer tank body 12 of the liquid hydrogen storage tank is at the liquid nitrogen temperature as far as possible; the cold bridge 05 may be a copper heat conducting rod or strip.
In the above embodiment, the inner tank 11 of the liquid hydrogen storage tank 01 and the inner tank 31 of the liquid nitrogen storage tank 03 both adopt aluminum linings, and high-strength carbon fibers are wound outside; the material composition of the outer tank body 12 and the connection with the cold bridge 05 are shown in fig. 3, the innermost layer adopts a copper lining 120, the high-frequency welding 122 is adopted between the inner layer and the cold bridge 05, and the outer layer covers a high-reflectivity polymer 121, so that the outer tank body 12 of the liquid hydrogen storage tank is kept at the liquid nitrogen temperature (77.7K) as far as possible, and the radiation heat exchange between the outer tank body 12 and the inner tank body 11 is reduced; a layer of heat-insulating cold screen 13 is sleeved outside the outer layer tank body 12 of the liquid hydrogen storage tank, the material is austenitic steel, and vacuum heat insulation is also adopted between the heat-insulating cold screen 13 and the outer layer tank body 12 so as to reduce radiation heat leakage between the outer layer tank body 12 at the temperature of liquid nitrogen and the environment; the instrument and the valve of the liquid hydrogen storage tank 01 are both arranged in the independent cold shield box 02 so as to reduce the heat leakage of the liquid hydrogen in the tank body to the environment when the valve works.
The pressure booster vaporizer 41 may be provided with an electrical heating aid to achieve a liquid nitrogen vaporization rate of at least 70%, ensuring on the one hand sufficient outlet pressure of the vaporizer and on the other hand sufficient fire-suppressing nitrogen gas generation.
Valve action method in the valve cold screen box 02: when the pressure measured by the pressure gauge 20 is higher than the set pressure value, the pressure relief safety valve 21 is opened to discharge the overpressure hydrogen to the external atmosphere or a recovery device. When the fuel cell vehicle is operating, the one-way drain valve 23 is opened, and the liquid is automatically drained by the pressure in the gas phase zone 14. And when the liquid level in the liquid hydrogen storage tank is lower than a set value, opening the one-way liquid filling valve 24 and the one-way exhaust valve 22 to replenish hydrogen for the liquid hydrogen storage tank.
Controlling the fire prevention and extinguishing device 04: when the liquid hydrogen storage tank is not leaked, the one-way liquid discharge valve 37 and the check valve 42 are both in a closed state, if the internal pressure 33 of the liquid hydrogen storage tank 03 exceeds a set value due to evaporation of liquid nitrogen, the pressure relief safety valve 34 is opened, and the safe operation of the liquid hydrogen storage tank 03 is ensured; when the liquid hydrogen storage tank 01 leaks to cause the hydrogen concentration in the vehicle-mounted density space to be higher than a safety allowable value, the hydrogen leakage monitor 25 sends a hydrogen leakage signal, the one-way liquid discharge valve 37 is opened, the liquid phase region 39 in the liquid hydrogen storage tank 03 flows to the pressurization gasifier 41 due to the pressure in the tank, partial gasification occurs, the gasification rate is not lower than 70%, then the gas flows through the check valve 42 and the pressure regulating valve 43 and is sprayed out from the atomizing spray gun 45, the hydrogen in the vehicle-mounted closed space is discharged to the external environment, and the temperature in the space is reduced; in addition, a gas bypass branch 44 is arranged behind the check valve 42, part of the gasified nitrogen flows through the stop gas valve 35 and returns to the liquid nitrogen storage tank 03, and the effect of self-pressurization of the fire prevention and extinguishing device is achieved by adjusting the pressure regulating valve 43; when the liquid level measured by the liquid nitrogen level meter 32 is lower than the set value, the fire prevention and extinguishing device 04 stops working, the one-way liquid filling valve 36, the stop air valve 35 and the pressure regulating valve 43 are opened, the liquid nitrogen flows through the liquid filling valve 36 to supplement nitrogen to the liquid nitrogen storage tank, and meanwhile, the gas phase area 38 is discharged through the stop air valve 35, the pressure regulating valve 43 and the atomizing spray gun 45 first and then, so that the nitrogen is smoothly supplemented.
In conclusion, the outer tank body of the vehicle-mounted liquid hydrogen storage tank is connected with the inner tank body of the liquid nitrogen storage tank by the cold bridge, so that the outer tank body of the liquid hydrogen storage tank is at the temperature close to liquid nitrogen, the radiation heat exchange between the inner tank body and the outer tank body of the liquid hydrogen storage tank is greatly reduced, the storage time of the liquid hydrogen is prolonged, and meanwhile, the leaked hydrogen can be rapidly extruded out of the vehicle-mounted closed space and cooled by utilizing the characteristics of high gasification latent heat and large gasification expansion volume of the liquid nitrogen, so that the use safety of the vehicle-mounted liquid hydrogen storage tank is effectively ensured.
Example 2
Referring to fig. 2, the vehicle-mounted liquid hydrogen storage tank integration device based on integration of fire extinguishing and heat preservation of liquid nitrogen of the embodiment adopts a separable series connection integration structure, adopts an independent and detachable liquid nitrogen storage tank 03, and is non-integrated between the heat insulation cold shield 13 of the liquid hydrogen storage tank 01 and the outer tank body 30 of the liquid nitrogen storage tank 03, but the outer tank body 12 of the liquid hydrogen storage tank 01 and the inner tank body 31 of the liquid nitrogen storage tank 03 are tightly connected by the cold bridge 05 with the vacuum union 50, and the configuration of other components is consistent with that of the above embodiment 1, and will not be described herein again.
In this embodiment, a schematic cross-sectional structure of the cold bridge 05 with the vacuum union 50 is shown in FIG. 4. The vacuum movable joint 50 is welded and fixed on the two sections of cold bridges 05, and the outer part of the vacuum movable joint is provided with threads; the contact end of the cold bridge 05 is coated with low-temperature heat-conducting silicone grease 55 to reduce contact thermal resistance; the front end of the movable joint 50 is provided with a sealing ring 54 to reduce heat leakage; a layer of cold insulation pipe 51 is wrapped outside the cold bridge 05 to reduce heat loss with the environment; a vacuum porous heat insulating material 53 is used in the heat insulating pipe 51, and a point support 52 is provided.
Example 3
Referring to fig. 5, the vehicle-mounted liquid hydrogen storage tank integration device based on integration of fire extinguishing and heat preservation of liquid nitrogen of the embodiment adopts a concentric layered integration structure, and comprises four layers of tank bodies from inside to outside, wherein the inner layer tank body 11 comprises a gas phase region 14 and a liquid phase region 15, a vacuum multilayer heat insulation 16 and an annular reinforcing rib support 17 are adopted between the inner layer tank body 11 and the outer layer tank body 12, the outer layer tank body 12 and the inner layer tank body 31 store liquid nitrogen, a point support 173 is arranged, and a vacuum multilayer heat insulation 16 and an annular reinforcing rib support 17 are also adopted between the inner layer tank body 31 and the outermost outer layer tank body 30; the rest of the component arrangement is identical to that of embodiment 1 above and will not be described again here.

Claims (8)

1. A vehicle-mounted liquid hydrogen storage tank integrated device integrating fire extinguishing and heat preservation based on liquid nitrogen is characterized by comprising a liquid hydrogen storage tank (01), a liquid nitrogen storage tank (03) and a fire preventing and extinguishing device (04) based on liquid nitrogen;
the liquid hydrogen storage tank (01) comprises an inner layer tank body (11), an outer layer tank body (12) and a heat insulation cold shield (13); a liquid hydrogen liquid level meter (18) and a pressure gauge (20) are arranged in the inner tank body (11), and electric remote transmission signals (19) of the liquid hydrogen liquid level meter and the pressure gauge are connected with a vehicle-mounted computer; the liquid hydrogen storage tank (01) is also provided with a pressure relief safety valve (21), a one-way exhaust valve (22), a one-way liquid discharge valve (23) and a one-way liquid charging valve (24), wherein the pressure relief safety valve (21) and the one-way exhaust valve (22) are connected to the top of the gas phase region (14) through a guide pipe, and the one-way liquid discharge valve (23) and the one-way liquid charging valve (24) are communicated to the bottom of the liquid phase region (15); valves of the liquid hydrogen storage tank are all arranged in an openable heat-insulating cold screen box (02), a vacuumizing port (27) is arranged in the heat-insulating cold screen box (02), and a hydrogen leakage monitor (25) is arranged at the upper part of the heat-insulating cold screen box;
the liquid nitrogen storage tank (03) comprises an inner tank body (31) and an outer tank body (30); a liquid nitrogen liquid level meter (32) and a pressure gauge (33) are arranged in the inner tank body (31), and an electric remote transmission signal (19) of the inner tank body is also connected to a vehicle-mounted computer; a safety pressure relief valve (34), a stop air valve (35), a one-way liquid charging valve (36) and a one-way liquid discharging valve (37) are arranged outside the liquid nitrogen storage tank (03), wherein the one-way liquid discharging valve (37) is connected to the liquid nitrogen fire prevention and extinguishing device (04);
the fire prevention and extinguishing device (04) comprises a liquid nitrogen pressurization gasifier (41), a check valve (42), a pressure regulating valve (43) and an atomizing spray gun (45) which are arranged in sequence; a self-pressurization bypass branch (44) is arranged between the check valve (42) and the pressure regulating valve (43) and is connected to the stop air valve (35);
the liquid hydrogen storage tank (01) and the liquid nitrogen storage tank (03) are connected in a cold bridge mode or adopt a concentric layered structure.
2. The integrated liquid hydrogen storage tank device integrating extinguishment and heat preservation based on liquid nitrogen as claimed in claim 1, wherein the heat-insulating cold screen (13) of the liquid hydrogen storage tank (01) is integrated with the outer tank body (30) of the liquid nitrogen storage tank (03) in a body.
3. The vehicle-mounted liquid hydrogen storage tank integrated device integrating fire extinguishment and heat preservation based on liquid nitrogen as claimed in claim 2, wherein an outer tank body (12) of the liquid hydrogen storage tank (01) is connected with an inner tank body (31) of the liquid nitrogen storage tank (03) through a copper cold bridge (05).
4. The integrated liquid hydrogen storage tank device integrating extinguishment and heat preservation based on liquid nitrogen as claimed in claim 1, wherein a separable series structure is adopted, and the heat insulation cold shield (13) of the liquid hydrogen storage tank (01) and the outer tank body (30) of the liquid nitrogen storage tank (03) are two independent tank bodies; the outer layer tank body (12) of the liquid hydrogen storage tank (01) is connected with the inner layer tank body (31) of the liquid nitrogen storage tank (03) through a copper cold bridge (05) with a vacuum movable joint (50).
5. The integrated fire extinguishing and heat preserving vehicle-mounted liquid hydrogen storage tank device based on liquid nitrogen of claim 4, wherein the vacuum movable joint (50) is welded and fixed on two sections of copper cold bridges (05), the outer part of the vacuum movable joint is provided with threads, and the front end of the vacuum movable joint is provided with a sealing ring (54); the contact end of the copper cold bridge (05) is coated with low-temperature heat-conducting silicone grease (55); a layer of cold insulation pipe (51) wraps the outside of the copper cold bridge (05), a vacuum porous heat insulation material (53) is adopted in the pipe, and a point support (52) is arranged.
6. The integrated liquid hydrogen storage tank device for liquid nitrogen-based fire extinguishment and heat preservation according to claim 1, wherein a concentric layered structure is adopted, and the liquid hydrogen storage tank (01) is positioned in the liquid nitrogen storage tank (03); and a point support (173) is arranged between the outer layer tank body (12) of the liquid hydrogen storage tank (01) and the inner layer tank body (31) of the liquid nitrogen storage tank (03).
7. The vehicle-mounted liquid hydrogen storage tank integration device integrating fire extinguishment and heat preservation based on liquid nitrogen as claimed in claim 6, wherein a vacuum multi-layer heat insulation (16) is adopted between an inner tank body (11) and an outer tank body (12) of the liquid hydrogen storage tank (01), and an annular reinforcing rib support (17) is arranged; a vacuum multi-layer heat insulation (16) is adopted between an inner tank body (31) and an outer tank body (30) of the liquid nitrogen storage tank (03), and an annular reinforcing rib support (17) is adopted.
8. The integrated fire extinguishing and heat preserving vehicle-mounted liquid hydrogen storage tank device based on liquid nitrogen as claimed in claim 1, wherein when the hydrogen concentration in the vehicle-mounted closed space is higher than a safe allowable value, the hydrogen leakage monitor (25) transmits a leakage electric transmission signal to a vehicle-mounted computer, and the vehicle-mounted computer sends an fire extinguishing preventing and extinguishing device starting instruction; the liquid nitrogen stop air valve (35), the one-way liquid discharge valve (37), the check valve (42) and the pressure regulating valve (43) are all opened; because a certain pressure is kept in the liquid nitrogen tank, liquid nitrogen flows out from the one-way liquid discharge valve (37) to the liquid nitrogen pressurization gasifier, and the gasification rate of the liquid nitrogen is higher than 70%; after passing through the check valve (42), one part of pressurized and gasified liquid nitrogen flows to the atomizing spray gun (45) from the pressure regulating valve (43) to expel, dilute and cool the hydrogen in the closed space, and the other part of pressurized and gasified nitrogen flows back to the liquid nitrogen storage tank (03) through the self-pressurizing bypass branch pipe (44) and the stop air valve (35), so that the sufficient self-flowing pressure in the tank is ensured.
CN201911418464.3A 2019-12-31 2019-12-31 Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen Active CN111006124B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911418464.3A CN111006124B (en) 2019-12-31 2019-12-31 Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911418464.3A CN111006124B (en) 2019-12-31 2019-12-31 Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen

Publications (2)

Publication Number Publication Date
CN111006124A CN111006124A (en) 2020-04-14
CN111006124B true CN111006124B (en) 2021-02-19

Family

ID=70120083

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911418464.3A Active CN111006124B (en) 2019-12-31 2019-12-31 Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen

Country Status (1)

Country Link
CN (1) CN111006124B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200025338A1 (en) * 2018-07-16 2020-01-23 Lawrence Livermore National Security, Llc System and method to cost-effectively pressurize cryogenic h2 by heat transfer
CN111678038A (en) * 2020-06-24 2020-09-18 中冶西北工程技术有限公司 LNG storage tank accident rescue system
CN114877247A (en) * 2022-04-08 2022-08-09 东南大学 Liquid hydrogen supply system for high-voltage fuel cell and control method thereof
CN114923125B (en) * 2022-05-23 2023-11-03 中国计量大学 Safety discharge device for enhancing hydrogen dilution by utilizing suspended nanoparticle adsorption

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN205260064U (en) * 2015-09-02 2016-05-25 煤科集团沈阳研究院有限公司 Mining portable liquid nitrogen fire prevention device
CN205372075U (en) * 2016-01-22 2016-07-06 杨超 Effectively reduce high vacuum insulation cryrogenic pressure vessel of evaporation rate
GB2564879A (en) * 2017-07-25 2019-01-30 Linde Ag Liquiefying a gaseous medium
CN207307039U (en) * 2017-08-18 2018-05-04 山东宏达科技集团有限公司 One kind fire extinguishing skid-mounted device
CN208107633U (en) * 2018-04-24 2018-11-16 安徽巨力能源有限公司 A kind of safe early warning type LNG storage tank
CN110043791A (en) * 2019-04-30 2019-07-23 成都深冷科技有限公司 The device and method of liquid hydrogen storage tank evaporation rate is reduced using liquid nitrogen cooling capacity

Also Published As

Publication number Publication date
CN111006124A (en) 2020-04-14

Similar Documents

Publication Publication Date Title
CN111006124B (en) Fire extinguishing and heat preservation integrated vehicle-mounted liquid hydrogen storage tank integrated device based on liquid nitrogen
CN105683643B (en) fuel tank
CA2530608C (en) Hydrogen handling or dispensing system
US20080314050A1 (en) No-vent liquid hydrogen storage and delivery system
JP5841680B2 (en) LNG tank
CN203161377U (en) Gas fuel supply system of marine power plant
CN216079287U (en) Low-temperature high-pressure hydrogen mixed filling type hydrogen filling station
AU2018344229B2 (en) Fuel cell system
KR101939983B1 (en) Fuel Storage Tank For Vehicle Using Cryogenic Liquid
Barelli et al. Boil-off gas emission from the fuel tank of a LNG powered truck
US20070214830A1 (en) Hydrogen tank system based on high-surface materials used for intermediate storage of excess hydrogen gas in stationary applications
Verfondern Safety consideration on liquid hydrogen
Michel et al. On-board equipment for liquid hydrogen vehicles
US3059804A (en) Safety device for insulated tank
Rinaldi et al. The hydrogen for base radio stations
CN220623666U (en) Low-temperature liquid silane storage tank
CN111623230A (en) Low-temperature high-pressure gas cylinder capable of directly filling LNG and avoiding blow-off BOG
GB2567265A (en) Fuel cell system
CN104751909A (en) Container pressurizing and energy-storage system in nuclear power station
RU2781731C1 (en) Adsorption system of reversible accumulation of vapors of liquefied natural gas
CA2619895C (en) Hydrogen handling or dispensing system
CN212617594U (en) Vacuum powder heat insulation low-temperature liquid storage tank
WO2023274559A1 (en) Arrangement and method in liquid hydrogen fuel supply system
Han et al. Development of Technical Specifications and Process System Requirements for the World’s Largest LH2 Refueling Station
CN210687760U (en) Coal mine liquid carbon dioxide direct injection system

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
GR01 Patent grant
GR01 Patent grant