1246 results about "Liquid hydrogen" patented technology

The invention discloses a hydrogen supply and energy storage device which comprises a hydrogen storage tank body, a gaseous hydrogen storage tank is installed in the hydrogen storage tank body, a liquid hydrogen storage tank is installed on the hydrogen storage tank body, a supporting plate is fixedly connected to the hydrogen storage tank body, and a cooling liquid storage box is installed at the top end of the supporting plate. A transverse plate is fixedly connected to the side wall of the cooling liquid storage box, metal cooling fins are arranged on the side wall of the transverse plate, and the cooling device further comprises a cooling circulation assembly and an air blowing cleaning assembly. A motor drives a first sector gear to rotate, the first sector gear is alternately engaged with a transmission gear and a driven gear, so that a rotating shaft drives metal heat dissipation fins to rotate for heat dissipation, and meanwhile, the driven gear drives cooling liquid to circularly flow in a sealing pipe, a cooling pipe and a liquid inlet pipe through a connecting rod and a piston rod; and cold airflow generated by the fan is used for dissipating heat of the hydrogen conveying pipe, so that the heat dissipation effect is improved.

The gradually-expanded printed circuit board type heat exchange inner core comprises a cover plate, a bottom plate, a cold side plate layer and a hot side plate layer, a cold side gradually-expanded channel is of a flow channel structure with the width gradually expanded, and the sectional area of a flow channel dynamically adapts to gas-liquid phase change and volume change. And pressure drop fluctuation and bubble aggregation caused by gas phase expansion are reduced, the shunt channels and the divergent channels are arranged in parallel, an inner wall porous structure is combined, medium distribution uniformity is optimized through graded distribution and surface wettability enhancement, and the flow stability is remarkably improved. The turbulent flow ribs are arranged in the heat exchange channel on the heat side, combination of heterogeneous working media such as supercritical CO2-water and liquid hydrogen-liquid oxygen is supported by destroying a heat boundary layer, inducing turbulent flow and strengthening convective heat exchange and phase change heat transfer, the heat exchanger can improve the heat exchange efficiency while reducing pressure drop, compactness, reliability and wide working condition adaptability are considered, and the heat exchange efficiency is improved. Two-phase flow optimization and efficient heat exchange are achieved, and the extreme heat exchange requirements in the fields of aerospace, new energy and the like are met.

The utility model relates to a liquid hydrogen storage tank with a vaporizer. Comprising an inner shell used for containing liquid hydrogen; the pressurizing unit comprises a pressurizing pipeline, and a pressurizing valve, a pressurizer and a pressurizing and pressure regulating valve which are sequentially arranged on the pressurizing pipeline in the medium flowing direction; one end of the pressurizing pipeline is connected with the bottom end of the inner shell, and the other end is communicated with the gas-phase space of the inner shell; the pressurizing unit is used for maintaining the pressure of the inner shell at a first pressure; the air supply unit comprises an air supply pipeline, and an air supply valve, a vaporizer, a pressure reducing valve and a check valve which are sequentially arranged on the air supply pipeline in the medium flowing direction; one end of the gas supply pipeline is connected with the bottom end of the inner shell, and the other end is connected with external gas utilization equipment; the vaporizer is used for converting liquid hydrogen into hydrogen, and the pressure reducing valve is used for reducing the pressure of the gasified hydrogen to the pressure required by gas equipment; and the exhaust unit is communicated with the gas phase space of the inner shell and is used for exhausting the overpressure gas. According to the storage tank, gas supply parameters can be changed according to gas use requirements of users, and the applicability is high.

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 relates to a hydrogen supply system and a new energy automobile. The system comprises a liquid hydrogen module and a gas hydrogen module, wherein the liquid hydrogen module and the gas hydrogen module are used for respectively providing hydrogen and high-pressure hydrogen subjected to first pressurization treatment for a pressurization module; the first side of the recovery module is connected with the liquid hydrogen module, and the recovery module is used for receiving recovered gas hydrogen discharged by the liquid hydrogen module and obtaining pressurized recovered gas hydrogen; the second side of the recovery module is connected with the gas hydrogen module and is used for transmitting the pressurized recovered gas hydrogen to the gas hydrogen module; the pressurizing module is used for performing second pressurizing treatment and third pressurizing treatment on the hydrogen subjected to the first pressurizing treatment and the high-pressure hydrogen to obtain pressurized target hydrogen; the buffer module is used for supplying the supercharged target hydrogen to the engine module. By adopting the hydrogen supply system, under the condition of low liquid hydrogen storage pressure, the liquid hydrogen supply pressure can be effectively maintained, stable operation of a fuel cell is guaranteed, meanwhile, evaporated hydrogen of the liquid hydrogen system is recycled, the energy utilization rate is increased, and then the power and cruising ability of a vehicle are guaranteed.

The invention relates to the technical field of liquid hydrogen storage and transportation, and discloses a liquid hydrogen container heat insulation performance rapid detection method, which comprises: S1, measuring the specification of a liquid hydrogen container and the initial state parameter in the liquid hydrogen container; s2, calculating initial parameters of liquid hydrogen and hydrogen in the liquid hydrogen container; s3, the change rate of the state parameters in the liquid hydrogen container is measured, and the final state parameters in the liquid hydrogen container are monitored; s4, calculating final parameters of liquid hydrogen and hydrogen in the liquid hydrogen container; s5, calculating the evaporation mass flow rate of the gas-liquid interface of the liquid hydrogen container according to the change rate of the state parameters in the liquid hydrogen container; s6, the thermodynamic energy change rate of hydrogen and liquid hydrogen in the liquid hydrogen container is calculated; s7, calculating the total internal energy change of the liquid hydrogen container, and calculating the total heat transfer amount of the gas phase and the liquid phase of the liquid hydrogen container; and S8, comparing the total heat transfer amount of the gas phase and the liquid phase of the liquid hydrogen container with standard static evaporation rate data to obtain the heat insulation performance of the liquid hydrogen container. The detection method has the characteristics that hydrogen does not need to be discharged, and the detection precision and safety are improved.

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.

The invention provides a multiphase hydrogen fuel flow and pressure cooperative control system, and belongs to the technical field of aero-engines, the multiphase hydrogen fuel flow and pressure cooperative control system comprises a liquid hydrogen tank, a liquid hydrogen pump, a heat exchanger, a pressure stabilizing valve, a regulating valve, a stop valve, a sensor and an engine main controller, the engine main controller receives engine state feedback and outputs a hydrogen fuel mass flow instruction; the pressure maintaining valve outlet pressure instruction calculation module and the pressure maintaining valve pressure closed-loop control module are arranged between the pressure maintaining valve and the engine, and the liquid hydrogen pump outlet pressure instruction calculation module and the liquid hydrogen pump outlet pressure compensation control module are arranged between the liquid hydrogen pump and the engine. The regulating valve outlet flow lead correction control module is arranged between the regulating valve and the engine; according to the scheme, the rotating speed of the liquid hydrogen pump, the opening area of the pressure maintaining valve and the opening area of the adjusting valve are cooperatively controlled, flow and pressure dynamic matching of the hydrogen fuel adjusting system under the non-stable working condition is achieved, and the flow control dynamic response performance of the hydrogen fuel adjusting system is improved.

The invention discloses a low-temperature high-toughness austenitic stainless steel welding wire and a preparation method thereof, and relates to the technical field of welding materials, in particular to a welding wire with high-toughness mechanical properties of formed cladding metal in a low-temperature environment and a preparation method of the welding wire. The Ti element is introduced into the welding wire, the dosage relation of the Al element and the Ti element is controlled, and the mass ratio of Al to Ti is kept to be (5-10): 1; a proper amount of Al element can play a role in purifying a molten pool during welding work, a proper amount of Ti element can effectively stabilize an austenite phase, and therefore it is guaranteed that the welding wire has the basic welding capacity, and meanwhile after the welding wire is converted into cladding metal, the welding wire is not prone to deformation. The material characteristics and the like of the material can meet the use requirements at room temperature and ultralow temperature environment, that is, the material has and keeps good tensile property, impact property and the like, so that pipelines, containers and the like prepared from the material can be used for transmitting or loading special low-temperature materials such as liquid hydrogen, liquid helium and the like.

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.

The invention discloses an austenitic stainless steel welding wire for a liquid hydrogen storage tank and a preparation method and application of the austenitic stainless steel welding wire, and belongs to the technical field of welding materials and preparation of the welding materials. The welding wire solves the problem that the low-temperature performance of a welding seam is poor when the current welding wire for the liquid hydrogen storage tank is used for welding. The welding wire comprises the following chemical components in percentage by mass: less than or equal to 0.02% of C, 0.4-1.5% of Si, 5.0-7.5% of Mn, less than or equal to 0.020% of S, less than or equal to 0.030% of P, 16.0-22.0% of Cr, 15.0-18.0% of Ni, 2.0-5.0% of Mo, 0.05-0.2% of N, less than or equal to 0.01% of O and the balance of Fe and inevitable impurities. According to the welding wire, deposited metal is low in low-temperature embrittlement tendency, high in low-temperature strength and excellent in low-temperature impact and fracture toughness. The welding wire is used for welding the austenitic stainless steel liquid hydrogen storage tank and is wide in application range, and the mechanical property of deposited metal is good.

The invention discloses a method and system for liquid hydrogen superconducting co-melting energy storage to participate in power grid frequency control, and belongs to the field of electrical engineering. The method comprises the steps that when a power grid frequency event occurs, the maximum and minimum value of the system frequency change rate is obtained according to the instantaneous frequency change rate of a power grid, and the active output control quantity of the liquid hydrogen superconducting co-melting energy storage system is determined according to the maximum and minimum value of the system frequency change rate and a power response coefficient. The charge and discharge dynamic characteristics of the liquid hydrogen superconductive co-melting energy storage system and the energy storage capacity of the system are used as operation constraints, and the liquid hydrogen superconductive co-melting energy storage system is controlled to cooperatively output according to a time sequence echelon response control strategy. The superconducting magnetic energy storage fast power response meets the active output control quantity; and after the set superconducting magnetic energy storage output duration time is exceeded, the hydrogen energy storage coordinated output makes up the active output control quantity vacancy caused by superconducting magnetic energy storage load shedding. The active power output of each device in the system can be effectively coordinated according to the liquid hydrogen superconductive co-melting energy storage operation characteristics, and the frequency stability of the power grid is improved.

The invention relates to a system for storing liquid hydrogen and for distributing gaseous hydrogen, comprising a source of liquid hydrogen (20), at least two gaseous hydrogen tanks (31-35) to be filled and a transfer device comprising: a transfer unit (25) configured to transfer liquid hydrogen from the hydrogen source (20) to any of the tanks, a vapour compressor (10) having a first upstream end and a second downstream end fluidly connected to each of the tanks, a set of valves (51-55), a control device configured to issue a command to transfer the liquid hydrogen and to open and / or close one or more valves (51-55), the compressor (10) being arranged so as to transfer vapours created during filling from any tank to each of the other tanks in succession, by compressing the vapors to a pressure greater than the pressure in the tank during filling.

A fuel system for a hydrogen fueled aircraft propulsion system comprises first and second hydrogen fuel tanks configured to store liquid hydrogen, first fuel line and second fuel lines configured to supply hydrogen from the first hydrogen fuel tank to a combustor of a first gas turbine engine and from the second hydrogen fuel tank to a combustor of a second gas turbine engine respectively. First and second fuel pumps are provided, each being configured to pump fuel in a respective first and second fuel line. First and second fuel heaters are provided, each being configured to heat fuel in a respective first and second fuel line. A fuel cross-feed fuel line is provided, which is configured to transfer fuel between the first and second fuel lines. The fuel cross-feed line is provided downstream in fuel flow of the first and second fuel heaters.

A liquid hydrogen storage tank capable of eliminating thermal stratification with low turbulence relates to the field of liquid hydrogen storage and comprises a tank body and a spray rod mechanism arranged in the tank body, the spray rod mechanism is communicated with a liquid hydrogen circulation pipeline, and liquid hydrogen in the tank body is extracted by the liquid hydrogen circulation pipeline and sprayed to a heat leakage point through the spray rod mechanism. The spray rod mechanism comprises a main guide pipe and a plurality of branch guide pipes, the tail ends of the branch guide pipes are provided with distribution assemblies attached to the heat leakage points, and the distribution assemblies are of structures defined by elastic metal wire meshes and filled with porous media, so that liquid hydrogen is dispersed and sprayed to the heat leakage points through the porous media, and turbulence of the liquid hydrogen is reduced. The spray rod mechanism is arranged in the storage tank, and the liquid hydrogen is directly sprayed to the heat leakage point by utilizing the guide pipe and the distribution component of the spray rod mechanism, so that turbulence of the liquid hydrogen in the tank is reduced, and evaporation of the liquid hydrogen caused by heat leakage is slowed down.

The invention relates to the technical field of hybrid aircrafts, and discloses a high-power take-off energy supply system for a hybrid aircraft based on superconducting magnetic energy storage, which is characterized in that a superconducting coil is directly soaked in a hydrogen storage tank of the aircraft, and a large amount of liquid hydrogen carried by the aircraft is used as a cold source of the superconducting coil; the weight of a refrigerating machine and a heat preservation tank which are necessary for original superconducting magnetic energy storage is saved; when the aircraft is in a scene with low power requirements such as level flight or landing, the power generated by the superconducting generator driven by the gas turbine is greater than the power required by the aircraft, and at the moment, the superconducting coil can be charged to realize energy recovery and storage; under the scene of high power demand such as takeoff, the advantages of high power density, high response speed and the like of the superconducting coil are utilized to provide electric power for the propulsion unit so as to meet the high-power demand of the aircraft in the stages such as takeoff and the like, and the high-power maneuvering, electric energy management and transmission capabilities of the hybrid aircraft are greatly improved.

The invention discloses a method for producing formic acid by reducing carbon dioxide through a hydrogen-driven hollow fiber catalytic membrane reactor, and relates to the technical field of carbon dioxide resource utilization. In order to solve the problems of low formic acid product selectivity, low CO2 conversion efficiency and high cost in the prior art, hydrogen is used as the only energy source, and a hollow fiber non-porous membrane is utilized to realize bubble-free efficient mass transfer of H2 to form a compact hydrogen-rich layer on the surface; the nano-metal particle catalyst loaded on the surface of the membrane synergistically activates hydrogen at a gas-liquid-solid three-phase interface to generate active hydrogen atoms, and CO2 transferred in a dissolved state or a gas phase is subjected to directional catalytic reduction to form formic acid with high selectivity. The method is operated at normal temperature and normal pressure, so that the H2 utilization efficiency and the CO2 mass transfer efficiency are remarkably improved, and the byproduct separation cost and the operation energy consumption are effectively reduced; the produced formic acid can be used as an important chemical raw material and intermediate, an excellent liquid hydrogen storage carrier, a formic acid fuel cell fuel and a microbial carbon source, and has wide application value.

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 a liquid hydrogen superconducting energy storage configuration system and method considering multi-mode safe operation. The system comprises a superconducting energy storage application scene demand module, a superconducting strip performance parameter module, a superconducting magnet structure economic configuration optimization module, a superconducting magnet'electricity-magnetism-heat 'multi-physics field simulation modeling module and a superconducting magnet dynamic safe working area module which are in synergistic effect. According to the method, the minimum energy storage capacity and the maximum magnetic field intensity threshold value are determined according to the superconducting energy storage application scene requirement, the genetic algorithm is adopted to conduct strip use amount minimum parameter optimization on magnet structure parameters, and an electricity-magnetism-heat multi-physics field coupling simulation model is established to quantify the liquid hydrogen cooling requirement. And finally, constructing a dynamic safe working area with the maximum allowable temperature to realize closed-loop control. Compared with the prior art, the multi-mode operation safety of the superconducting energy storage system can be guaranteed, meanwhile, the using amount of superconducting strips and the liquid hydrogen cooling capacity are reduced, and the economic efficiency of the system is improved.

A pumping system includes a plurality of interconnected integrated motor / pump modules (IMPs) submerged in a process liquid, such as liquid hydrogen (LH2), within a container, the IMPs being separately controlled by adjustable speed drives (ASDs). The rotation speeds of the IMP impellers are controlled such that the NPSH_A for each IMP remains above a minimum, critical suction head NPSH_c of the IMP, while the outlet pressure and flow of the last IMP is maintained at a specified level unless its NPSH_A falls substantially to its NPSH_c, or until the container is substantially empty. The IMPs can be identical, initially operating at the same speeds, or the first IMP can be an inducer IMP having a reduced NPSH_c. The IMPs can comprise permanent magnets or induction coils attached to their impellers that pass in proximate radial or axial alignment with stator coils. The ASDs can be variable frequency drives (VFDs).

The invention discloses an engine configuration using liquid hydrogen as a coolant and fuel and an overall design method, and relates to the field of aero-engines, and the engine configuration comprises an air inlet channel, a fan, a precooler, an air compressor, a main combustion chamber, a high-pressure turbine, a low-pressure turbine, a mixing chamber, an afterburner and an exhaust nozzle. Only the inner culvert airflow is cooled, on the basis of solving the difficulty of rotation limitation under the high Mach number working condition of the core engine, the problem of cooling capacity waste generated by precooling the outer culvert airflow is avoided, and the liquid hydrogen amount depends on the combustion amount needed by the main combustion chamber and the afterburner; therefore, the waste problem caused by the fact that the amount of liquid hydrogen needed by pre-cooling is larger than the amount of liquid hydrogen needed by combustion is avoided. According to the overall design of the engine, from the angle of flight / intake / launch integration, the size and performance parameters of an engine body are determined in a ground state based on the take-off task requirement of an aircraft, the size of an intake and exhaust system is determined in a cruise state based on the cruise task requirement of the aircraft, and a control rule is determined by the engine demand flow and the intake passage capture flow.

A work vehicle includes a chassis having frame rails, a cargo bed disposed along the chassis, an electric motor disposed on the chassis, one or more fuel cell enclosures disposed under the cargo bed, and a hydrogen tank disposed above the one or more fuel cell enclosures. The one or more fuel cell enclosures include a plurality of fuel cells configured to be inserted into the one or more fuel cell enclosures, and one or more leak-free valves configured to couple the plurality of fuel cells with the work vehicle.

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.

The invention relates to a liquid hydrogen storage tank heat insulation structure multi-objective optimization method based on a quasi-two-dimensional model and an NSGA-2 algorithm. The method comprises the steps that digital modeling is conducted on a liquid hydrogen storage tank variable-density multi-layer heat insulation structure and a steam cooling screen based on the quasi-two-dimensional model; taking the position of the steam cooling screen and the layer number of each spacing layer heat insulation layer as optimization objects, and taking the manufacturing cost and the heat insulation performance of the heat insulation structure of the liquid hydrogen storage tank as optimization objectives to construct a multi-objective optimization model; and solving the multi-objective optimization model based on an NSGA-2 algorithm to obtain the optimal values of the position of the steam cooling screen and the number of layers of the heat insulation layers of the spacing layers as optimization results. Compared with the prior art, the method can synchronously improve the heat insulation efficiency and reduce the manufacturing cost, and has the remarkable advantages of high model precision and excellent optimization efficiency.

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.

The invention relates to the technical field of ferrous metallurgy, in particular to a high-strength extremely-low-temperature welding material wire rod and a manufacturing method and application thereof.The manufacturing method comprises the steps that molten steel smelting is conducted according to chemical components and percentages of the high-strength extremely-low-temperature welding material wire rod, a square billet is manufactured in a forging and rolling mode after die casting, the square billet is heated and subjected to heat preservation for 4.5-6 h, and then the square billet is rolled into a first-diameter wire rod; cooling after rolling, uncoiling a wire rod, reducing the diameter from a first diameter to a second diameter through three times of drawing, annealing, reducing the diameter from the second diameter to a third diameter through three times of drawing after annealing, and finally performing finish drawing to a fourth diameter. The high-manganese steel liquid hydrogen storage tank welding material can be used for producing the high-manganese steel liquid hydrogen storage tank welding material, is matched with high-manganese steel welding and is good in forming, the content of Mn in formed weld metal is 24-28 wt%, the situation that due to large-range diffusion of the manganese element, the structure and performance near a fusion line are greatly different is avoided, and the extremely-low-temperature service mechanical performance of the weld metal is guaranteed.