833 results about "Liquid hydrogen" patented technology

A hydrogen aircraft includes: an airframe including a fuselage and a wing; at least one propulsion system fixed to the airframe; a pressurized chamber disposed inside the fuselage; a pressure bulkhead that is disposed at a rear part of the pressurized chamber and has strength to withstand pressurization of the pressurized chamber; a hydrogen tank that is disposed in an accommodation section and stores liquid hydrogen, the accommodation section being installed behind the pressure bulkhead, outside the pressurized chamber, and inside the fuselage; and a supply line that supplies the liquid hydrogen stored in the hydrogen tank to the propulsion system.

The invention discloses a liquid hydrogen container heat leakage prediction and boost characteristic detection method and system. The method comprises the following steps: establishing a three-dimensional heat flow field model of a liquid hydrogen container; calculating the heat flow density of a gas-liquid interface based on the three-dimensional heat flow field model so as to adjust the liquid hydrogen evaporation capacity; total heat leakage is obtained through finite element simulation and experimental data collaborative calibration; calculating a static evaporation rate according to the total heat leakage; establishing a nonlinear mapping model of the static evaporation rate and the boost rate through a response surface regression method; the wall temperature distribution of the liquid hydrogen container is monitored in real time, thermophysical parameters are calibrated through the LSTM neural network by adopting a dynamic calibration algorithm, and the output result of the three-dimensional heat flow field model is corrected. By establishing a three-dimensional heat flow field model of the liquid hydrogen container, determining a nonlinear response relationship between the evaporation rate and the pressure rising rate of the liquid hydrogen container, and constructing a cloud-edge collaborative detection system, the heat leakage performance of the liquid hydrogen container is accurately predicted, and efficient pressure rising rate detection is realized.

The invention discloses 15Ni steel for an ultralow-temperature liquid hydrogen storage tank and a preparation method of the 15Ni steel, and belongs to the technical field of metallurgy. The 15Ni steel comprises the following chemical components in percentage by mass: 0.02%-0.07% of C, 0.10%-0.30% of Si, 0.20%-0.80% of Mn, 0.15%-0.30% of Mo, 0.020%-0.050% of Al, 12.5%-15.5% of Ni, 0.0015%-0.0060% of N, less than or equal to 0.008% of P, less than or equal to 0.002% of S, less than or equal to 0.020% of Nb, less than or equal to 0.080% of V, less than or equal to 0.020% of Ti and the balance of Fe and inevitable impurities. The preparation method comprises the procedures of smelting, continuous casting, heating, rolling and heat treatment. The steel plate produced by the invention has excellent ultralow temperature (-269 DEG C) impact toughness, effectively solves the problems of brittle phase martensite precipitation and low strength of stainless steel at a low temperature of-196 DEG C, can replace stainless steel to be widely used for manufacturing large ultralow temperature liquid hydrogen storage tanks, and has wide application prospects.

A system and method for hydrogen storage, and delivery. The system includes a hydrogen storage tank, a first pump disposed within the hydrogen storage tank, and a second pump disposed outside of the hydrogen storage tank. The hydrogen storage tank is to store gaseous hydrogen and liquid hydrogen. The first pump is to pump out liquid hydrogen out of the storage tank, producing a low pressure flow. The second pump is to receive this low pressure flow and produces a high pressure flow of liquid hydrogen. The system can also include a thermal device disposed within the hydrogen storage tank to heat gaseous hydrogen when a pressure within the hydrogen storage tank drops below a predetermined minimum pressure. The system can also include a heat exchanger to receive the high pressure flow of liquid hydrogen from the second pump.

The invention relates to the technical field of low-temperature gasification and heat management, and discloses an ice layer monitoring prediction and self-adaptive control device for a liquid hydrogen air temperature type gasifier. A data acquisition unit of the device acquires the running state of the gasifier and multi-source sensor data of an external environment; the weather prediction unit obtains weather change information in a future period and calculates a comprehensive influence coefficient of weather on the operation state of the gasifier; the data fusion and processing unit calculates an ice layer thickness correction value of each monitoring node according to the data of the multi-source sensor; the threshold value judgment unit judges the icing state of the node, and after the node is judged to be in the icing state, a judgment index representing the icing risk and the ice layer development trend is calculated; and the control response unit switches a deicing mode and executes a corresponding deicing control strategy according to the change state of the judgment index, and switches a high-energy-consumption deicing mode, a low-energy-consumption deicing mode and an observation mode. The deicing energy consumption of the gasifier is reduced, and the operation stability and the heat efficiency are improved.

An aircraft comprises a fuselage; wings; engines connected to the wings; a set of liquid hydrogen tanks; a vent located on the tail on the fuselage; a conduit system connecting the liquid hydrogen tanks to the vent; and a controller. The controller is configured to control the conduit system to remove gaseous hydrogen in the set of liquid hydrogen tanks to travel through the conduit system and exit at the vent in response to pressure in the set of liquid hydrogen tanks being greater than a specified tolerance.

The invention relates to the technical field of aviation aircraft power systems, and discloses an aero-engine liquid hydrogen fuel conveying system and a control method thereof, which adopt multi-branch high-precision metering to realize wide-range high-precision flow regulation requirements, determine branch through-flow capability by a root order method, and realize high-precision flow regulation of the aero-engine liquid hydrogen fuel conveying system. The number of hydrogen supply branches, the available regulation ratio of the regulating valve and the total flow regulation ratio demand are matched, and the problem of high-precision fuel conveying in an extremely wide flow regulation range is solved. The circulating coupling heat exchanger is adopted to reasonably utilize waste heat of the system to raise the temperature of hydrogen fuel to the level suitable for combustion, reasonable optimization of heat / energy utilization of the system is achieved, fuel consumption is reduced, and circulating heat efficiency is improved. The hydrogen temporary storage tank is adopted to solve the problem that the supply flow of an upstream liquid hydrogen pump and a heat exchanger is not matched with the flow required by a downstream regulating valve due to hysteresis in the heat exchange process in the fuel flow regulation transient process.

According to the gas-liquid mixing hydrogen refueling station system with the cooling capacity recovery and gradient utilization functions, flash steam of the low-temperature liquid hydrogen storage tank is collected and stored in the low-temperature hydrogen storage tank, the cooling capacity of the flash steam is fully utilized, cooling capacity is provided for the heat exchanger, high-pressure hydrogen is cooled, the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized, and the cooling capacity of the low-temperature flash steam of the liquid hydrogen is fully utilized. Energy gradient utilization of cooling capacity is achieved, and loss of extra energy in the hydrogen refueling station is reduced; the flash steam obtained after heat exchange is further used for hydrogen compression, and reutilization of the low-temperature liquid hydrogen flash steam is achieved; the flash steam after heat exchange is pressurized and then cooled by using the cooling capacity of the high-pressure liquid hydrogen, and meanwhile, the heating gasification of the high-pressure liquid hydrogen is realized, namely the gasification of the pressurized liquid hydrogen in the liquid hydrogen refueling station and the cooling of a gas hydrogen pressurization process in the liquid hydrogen refueling station are coupled for heat exchange, so that the utilization efficiency of the heat and the cooling capacity is greatly improved; an external vaporizer is not needed for high-pressure liquid hydrogen gasification, an external cooler is not needed in the gas-hydrogen pressurization process, and energy consumption is greatly reduced.

The invention discloses an intelligent cooperative control method and system for an extra-heavy hydrogen energy special vehicle, and belongs to the technical field of new energy vehicles. The method comprises the steps of collecting vehicle state data through a sensor network; based on the state data, adopting a model predictive control (MPC) algorithm to solve an optimal torque and distributing the optimal torque to the distributed driving system; according to the part temperature data, a thermal system is regulated and controlled through a thermal management algorithm TMS; and preprocessing the hydrogen system data, inputting the hydrogen system data into the LSTM model, and outputting leakage probability and positioning to execute multi-stage early warning. The system comprises a central controller, a sensor network and a combined driving system. Through multi-core domain control deep fusion of MPC, TMS and LSTM, global optimization collaboration of multiple groups of high-power hydrogen fuel cells, a high-density high-power energy storage battery pack, a liquid hydrogen storage and safety module, multiple groups of axial flux motor driving systems, a sensing network and central control extra-heavy vehicle parts is realized; and the endurance mileage of the vehicle and the intelligent control heavy load performance in a mine field and a special scene are effectively improved.

The utility model relates to a liquid hydrogen storage system which comprises an integrated hydrogen storage device and a hydrogen storage medium, the integrated hydrogen storage device comprises a liquid storage tank for storing a hydrogen storage medium, a gas storage tank for storing hydrogen, a reactor connected with the output ends of the liquid storage tank and the gas storage tank, a condenser connected with the reactor, a gas-liquid separator connected with the output end of the condenser, a gas compressor and a gas buffer tank, and one or more unsaturated aromatic hydrocarbons or heterocyclic unsaturated compounds with a saturated vapor pressure of more than 1 kPa and a temperature of 20 DEG C. The gas-phase storage medium of the liquid hydrogen storage system sequentially passes through the condenser, the gas-liquid separator, the gas compressor and the gas buffer tank, so that a hydrogen pressurizing, cooling and refluxing process is realized, a liquid hydrogen storage material can be effectively recycled, and the purity of hydrogen can be ensured.

A system such as a refueling station capable of multi-mode dispensing is provided. The refueling station is configured to dispense a fuel such as hydrogen to vehicles in different modes, for example, in a form selected from liquid hydrogen, cryo-compressed hydrogen, and compressed hydrogen gases under different nominal pressures such as 35 MPa and 70 MPa. A method of making the same and a method of using are also provided.

This heat insulation structure of a tank wall includes a tank wall, a plurality of heat insulation panels, an interlayer heat insulation material, and a soft material. The tank wall defines an accommodation space for cryogenic fluid. The heat insulation panels are arranged on the outer periphery of the tank wall and each include an inner first heat insulation layer and an outer second heat insulation layer that have mutually different heat insulation performances. The interlayer heat insulation material is disposed between: the second heat insulation layer of one of the heat insulation panels that are adjacent when arranged on the outer periphery; and the second heat insulation layer of the other of such heat insulation panels. The interlayer heat insulation material is disposed in a state of being divided from the foregoing second heat insulation layers. The soft material is interposed between the interlayer heat insulation material and the second heat insulating layer.

A system and method for high rate liquid hydrogen tank filling is provided. The flexible, pump-based filling system can achieve high fill rate of liquid hydrogen in excess of 100 kg per minute and accommodate maximum delivery pressures. The present system and method further includes recovery and re-liquefaction of displaced and flash generated tank vapors.

The invention discloses a small modular hydrogen liquefaction and intelligent filling system and method. The system is integrated in a container module and comprises a pretreatment purification module connected with a raw material hydrogen source and used for purifying raw material hydrogen, a liquefaction module connected with the pretreatment purification module and used for cooling and liquefying the purified hydrogen, and a liquid hydrogen storage and transportation and filling module connected with the liquefaction module and used for storing liquefied hydrogen, the central control module is respectively connected with the pretreatment purification module, the liquefaction module and the liquid hydrogen storage and transportation and filling module and is used for controlling all the modules. According to the system, rapid deployment is achieved through modular design, low energy consumption and low cost are achieved by optimizing operation through a prediction algorithm, the system is particularly suitable for distributed hydrogen production scenes and small and medium-sized hydrogen refueling stations, and the problems that an existing large liquefying device is not flexible and a traditional refueling station depends on external hydrogen supply are effectively solved.

The invention relates to the technical field of vacuum insulation manufacturing of liquid hydrogen storage and transportation equipment, and discloses a liquid hydrogen spherical tank vacuumizing and filtering multi-parameter cooperative control method and system, and the method comprises the steps: obtaining the temperature, vacuum degree and vibration monitoring data in a liquid hydrogen spherical tank, and space coordinates of the data; calculating a vacuum degree mean value and a vibration intensity mean value of each partition, and generating a multi-physical field heterogeneous partition topological structure; extracting a physical field coupling factor matrix by using a tensor decomposition algorithm, and identifying a dominant coupling relationship between physical fields; and scheduling the multi-parameter monitoring data to be transmitted in a shallow fading period according to the partition period quality label matrix, completing issuing of a scheduling cooperative control instruction before deep fading arrives, and outputting the control instruction to an execution mechanism. The overall performance and safety of the liquid hydrogen spherical tank vacuumizing and filtering multi-parameter cooperative control system are improved under the extreme environment of coupling influence of multiple physical fields such as a temperature field, a vacuum degree field and a vibration field.

A cold energy recovery facility includes a liquid hydrogen tank configured to store liquid hydrogen a first circuit configured to circulate a first working medium, a second circuit configured to circulate a second working medium having a freezing point higher than the first working medium, a first turboexpander provided in the first circuit, the first turboexpander being configured to be driven by the first working medium in a gas state, a second turboexpander provided in the second circuit, the second turboexpander being configured to be driven by the second working medium in a gas state, a first heat exchanger configured to vaporize the liquid hydrogen from the liquid hydrogen tank by heat exchange with the first working medium, a second heat exchanger configured to vaporize the first working medium in a liquid state by heat exchange with the second working medium, and a third heat exchanger configured to vaporize the second working medium in a liquid state by heat exchange with a heat medium, wherein the first circuit and the first turboexpander form a part of a first thermodynamic cycle that uses the liquid hydrogen as a low-temperature heat source in the first heat exchanger, and the second circuit and the second turboexpander form a part of a second thermodynamic cycle that uses the first working medium as a low-temperature heat source in the second heat exchanger.

A propulsion system comprises a propulsive hydrogen-burning gas turbine engine, a first tank storing liquid hydrogen with an ullage and a first fuel line including a fuel pump and a vaporiser, the first fuel line providing gaseous hydrogen to the engine during operation of the system. A second tank storing gaseous hydrogen is coupled by a second fuel line to the first fuel line at a position thereon between the vaporiser and the engine, providing for engine start-up (when the vaporiser is inoperative) and power-boosting during operation of the system. A duct connects gaseous hydrogen within the second tank to the ullage in the first tank in order maintain pressure in the first tank as liquid hydrogen within it is depleted, preventing cavitation of liquid hydrogen within the fuel pump.

The application discloses a modular hydrogen liquefaction system, comprising: one or more parallelly arranged liquefaction modules, a hydrogen inlet of the liquefaction module being connected with a hydrogen source, and a product outlet of the liquefaction module being connected with one or more parallelly arranged liquid hydrogen storage tanks; each of the liquefaction modules is an integrated structure capable of hydrogen cooling, liquefaction, primary and secondary hydrogen conversion and independent start and stop. The application realizes hydrogen liquefaction by connecting a large number of refrigeration units in series and in parallel to form modules at different levels, can effectively utilize the benefit of large-scale production of standard refrigeration units, and reduces equipment cost. By controlling the number of different level modules and refrigeration units to be started, the application can also realize large-range liquid hydrogen production capacity adjustment. In addition, by using a regenerative refrigerator as a standard refrigeration unit, rapid cooling and instant shutdown can be realized, so that the system has the advantages of rapid start and stop. The above advantages make the application particularly suitable for matching with renewable energy to produce green liquid hydrogen.

The invention provides a device and a method for reducing exhaust loss by using the pressure of a liquid hydrogen storage tank, and relates to the technical field of liquid hydrogen storage and transportation safety. The device comprises an adsorption storage assembly, a desorption recovery assembly and an adsorption enhancement assembly which are arranged in a gas pillow of the liquid hydrogen storage tank. The adsorption and storage assembly is communicated with the air pillow through a one-way mechanical low-temperature valve, is internally provided with a solid adsorption material and a vacuum heat insulation cylinder, and is used for adsorbing and storing evaporation gas and reducing the tank pressure when the tank pressure is increased; the adsorption enhancing assembly comprises a low-temperature hydrogen regulating valve and a low-temperature heat exchanger, and the throttling effect of high-pressure hydrogen in the tank is used for refrigerating an adsorption material, so that the adsorption capacity of the adsorption material is improved; the desorption recovery assembly heats an adsorption material through an intermediate heater, and controllable release of hydrogen is achieved. According to the invention, the active management of the pressure of the liquid hydrogen storage tank and the efficient recovery of the boil-off gas are realized, the exhaust period is obviously prolonged, the hydrogen loss is reduced, and the storage and transportation economy and safety are improved.

The application discloses an ultralow-temperature steel and a heat treatment process and application thereof, and relates to the technical field of ultralow-temperature steel. ‑2 The ultralow-temperature steel comprises the following components in percentage by mass: C: 0.41% to 0.45%, Mn: 23.5% to 24.5%, Cr: 3.5% to 3.7%, Cu: 0.35% to 0.45%, Ni: 0.55% to 0.65%, V: 0.20% to 0.24%, Mo: 0.20% to 0.24%, Si: 0.15% to 0.25%, Al: 0.02% to 0.04%, and the balance of Fe and inevitable impurities; the ultralow-temperature steel is full austenite structure, and the stacking fault energy of the ultralow-temperature steel is 18 to 21 mJ·m ‑2 at-269 DEG C. The ultralow-temperature steel has multiple properties of excellent ultralow-temperature resistance, corrosion resistance and hydrogen damage resistance through the specific heat treatment process and the component composition, can be applied to the storage and transportation of ultralow-temperature medium such as liquefied natural gas and liquid hydrogen, and is suitable for complex environments such as land, sea and aviation.

The utility model provides a reaction tube cleaning device, and belongs to the technical field of hydrogen energy storage device cleaning. The reaction tube cleaning device comprises: a heating tank for accommodating and heating a reaction tube; the brush is used for cleaning the inner wall of the reaction tube; the cleaning liquid storage tank is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are both communicated with the heating tank; the hydraulic machine is arranged between the liquid inlet and the reaction tube. According to the reaction tube cleaning device, the reaction tube is arranged in the heating tank, and the cleaning liquid pressurized by the hydraulic machine is conveyed into the heating tank through the cleaning liquid storage tank, so that the reaction tube can be cleaned by the cleaning liquid under a certain heating condition and certain pressure, and meanwhile, the inner wall of the reaction tube is cleaned by the brush, so that the reaction tube can be fully cleaned; and the device is suitable for small reaction tubes with various specifications in an organic liquid hydrogen storage system.

The invention discloses an operation method and system of a liquid-gas dual-mode liquid hydrogen refueling station, the system realizes the switching of a refueling route through a plurality of liquid hydrogen control valves and a control switch of a gas hydrogen control valve, liquid hydrogen output from a liquid hydrogen storage tank is primarily pressurized through a first liquid hydrogen booster pump, and in the liquid hydrogen refueling route, the liquid hydrogen output from the liquid hydrogen storage tank is pressurized through a second liquid hydrogen booster pump. The liquid hydrogen pressurized for the first time is in a supercooled state and is not easy to evaporate, the generation of BOG is greatly inhibited, the leakage amount of the liquid hydrogen in a liquid-liquid filling process can be reduced, the filling efficiency is improved, in a high-pressure hydrogen filling route, the liquid hydrogen in a supercritical state can also effectively reduce the cavitation problem of a pump during secondary pressurization, waste of liquid hydrogen cold energy is reduced, and the production cost is reduced. High volume efficiency can be effectively guaranteed, and durability of equipment and efficient operation of the hydrogen refueling station are guaranteed.

The invention discloses a liquid hydrogen high-temperature superconducting motor and magnetofluid dual-power propulsion system, and aims to solve the problems that an existing ship propulsion system is single in power mode and insufficient in power density. The system comprises a liquid hydrogen storage and supply unit, a cooling unit, an energy conversion unit, a superconducting motor propulsion unit and a magnetofluid propulsion unit, the liquid hydrogen storage and supply unit conveys liquid hydrogen to the superconducting part through the cooling loop, the liquid hydrogen is converted into hydrogen through the heat exchanger after being cooled, the energy conversion unit converts the hydrogen into electric energy and outputs the electric energy in a matched mode, and the superconducting motor propulsion unit and the magnetic fluid propulsion unit generate mechanical energy or electromagnetic force through the electric energy to drive a ship. And the superconducting component is cooled by the cooling loop. The liquid hydrogen in the system has the dual functions of a cooling medium and fuel, a coolant and fuel do not need to be additionally configured, the requirements for silence, high thrust and rapid maneuvering are met, the power density is high, the environmental protection property is good, and the system is suitable for high-performance propelling scenes such as ships, especially submarines.

The invention belongs to a sealing structure and aims to solve the problem that an existing piston sealing structure used in liquid hydrogen filling is affected by the low-temperature and high-pressure environment. The sealing structure suitable for the low-temperature liquid hydrogen pump and the low-temperature liquid hydrogen pump comprise a piston rod body arranged in an inner cavity of a pump body, and a plurality of piston rings are installed on the outer wall of the sealing end of the piston rod body in the axial direction. An elastic piece is arranged between the piston ring and the outer wall of the sealing end, and the piston ring and the elastic piece form a radial sealing structure. Meanwhile, the radial sealing structure abuts against one axial end of the sealing groove, an elastic cushion piece is arranged between the radial sealing structure and the other axial end of the sealing groove, and the elastic cushion piece and the radial sealing structure form an axial sealing structure. The sealing structure is less affected by the low-temperature and high-pressure environment, the sealing performance is greatly improved, the service life can be effectively prolonged, and leakage is reduced.

The application discloses a kind of liquid hydrogen centrifugal submerged pump inducer hydraulic and anti-cavitation performance optimization method, belong to liquid hydrogen pump inducer optimization design technical field.Step includes: through Bezier curve control and change the three-dimensional structure of inducer blade;With the design variable of Bezier curve center control point coordinate, carry out Latin hypercube sampling, generate inducer calculation sample;Establish inducer flow field geometric model and carry out numerical simulation, obtain inducer hydraulic and cavitation performance sample library;Deep learning inducer performance prediction proxy model is constructed, and the optimal center control point coordinate is solved using genetic algorithm, generates optimal inducer model and verifies.The application generates the three-dimensional structure of liquid hydrogen inducer by accurate control, establishes deep learning prediction model and intelligent multi-objective optimization, realizes the hydraulic and cavitation performance promotion of inducer, and improves the design and optimization efficiency of liquid hydrogen inducer.

A fuel system having a hydrogen fuel tank for fueling a fuel feed and propulsion system. The fuel system having a jet pump within the hydrogen fuel tank, at least one primary pump receiving fuel from the jet pump and pressurizing fuel to an outlet path and a first fuel recirculation path configured to selectively recirculate fuel to the hydrogen fuel tank. The first fuel recirculation path is fluidly connected to the outlet path. The first fuel recirculation path includes a heat exchanger positioned within the hydrogen fuel tank to cool fuel received from at least one of the fuel feed system or a tank pressurization system. The heat exchanger and a Joule-Thomson expansion at the jet pump minimizes recirculated fuel temperature, which in combination with a selective flow recirculation rate improve the life of the primary pump downstream.

The application provides a liquid hydrogen diffusion state real-time analysis method and system, which photographs temperature change white fog images of a liquid hydrogen leakage site at a set time interval, monitors surrounding related atmospheric environmental factors, determines the dew point temperature of the site atmosphere, constructs a liquid hydrogen vapor volume concentration calculation model of a liquid hydrogen diffusion temperature change white fog boundary according to the heat conservation principle at the boundary, further divides diffusion types for different liquid hydrogen diffusion situations, respectively combines the liquid hydrogen vapor volume concentration calculation model, the atmospheric environmental factors and the position change of the temperature change white fog boundary relative to the leakage source within a set time period, and analyzes diffusion speed and diffusion position data at a current and future demand time point. The scheme can solve the problems of monitoring data lag and insufficient precision of the existing liquid hydrogen leakage monitoring technology, can flexibly obtain dynamic diffusion conditions of the leakage site based on simple calculation, and can effectively predict the trend of liquid hydrogen diffusion.

The utility model discloses a composite hydrogen supply system and hydrogen using equipment. The composite hydrogen supply system comprises a methanol storage device, a water storage device, a mixing device, a reaction chamber, a catalytic burner and a hydrogen storage device, the methanol storage device and the water storage device are connected to the mixing device in parallel, the mixing device is connected with the reaction chamber, the reaction chamber is used for being connected with hydrogen using equipment, and the catalytic burner is connected with the hydrogen storage device. The reaction chamber is used for carrying out reforming hydrogen production reaction or organic liquid hydrogen storage and desorption reaction, the catalytic burner is connected to the reaction chamber and used for maintaining the temperature needed by the reaction chamber, and the hydrogen storage device is used for being connected with hydrogen using equipment and used for providing hydrogen for the hydrogen using equipment in the cold start stage of the system. The water storage device is further used for being connected with hydrogen using equipment so as to collect water generated by the hydrogen using equipment. The composite hydrogen supply system provided by the utility model can solve the problem of slow cold start of methanol reforming hydrogen production in the prior art, and improves the hydrogen storage density of the whole system at the same time.

This invention discloses a support structure, front and rear support structures, and a liquid hydrogen cylinder, relating to the technical field of liquid hydrogen cylinder support structures. The support structure includes: a first metal connector, a second metal connector, and a support body. The first metal connector is used for welding to an outer end cap; the second metal connector is used for welding to an inner end cap. The support body is made of fiberglass, and its two ends are directly or indirectly connected to the first and second metal connectors, respectively. The support body constitutes the load-bearing and heat transfer path between the first and second metal connectors, and the first and second metal connectors are only used for welding to the inner and outer end caps and connecting to the support body. This invention reduces thermal conductivity and achieves lightweight design.

The utility model provides a liquid hydrogen storage device which can reduce heat input from a port to the inside of a hydrogen tank so as to improve the heat insulation performance of the hydrogen tank. This liquid hydrogen storage device (100) is provided with: a hydrogen tank (10) that is mounted in a vehicle (200) and stores liquid hydrogen; and an evaporation line (40) connected to the hydrogen tank (10) and discharging hydrogen gas gasified in the hydrogen tank (10) to the outside of the vehicle (200), the liquid hydrogen storage device (100) being characterized in that the hydrogen tank (10) is provided with a pump port (20) protruding from the outer surface, and the evaporation line (40) is disposed so as to surround the pump port (20).