526 results about "Liquid hydrogen" patented technology

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 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 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.

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).

The invention relates to an arrangement for transferring liquid hydrogen from a first storage vessel (1) into a second storage vessel (2), in which the storage vessel to be filled can be filled with a filling quantity of more than 200 kg at filling rates of more than 1 ton per hour, with only a filling line, but no return line, being required for this.

The invention relates to the technical field of detection, in particular to an inner wall state detection device for a liquid hydrogen transportation tank, which comprises a miniature liquid hydrogen transportation outer tank, a miniature liquid hydrogen transportation inner tank is welded and fixed at the upper end of the inner wall of the miniature liquid hydrogen transportation outer tank, and the upper end of the miniature liquid hydrogen transportation inner tank penetrates through the top of the miniature liquid hydrogen transportation outer tank and is in threaded connection with a screw cover; according to the device, by means of the characteristic that liquid argon can be gasified when making contact with normal-temperature air, when the micro liquid hydrogen transportation outer tank is broken, the trigger mechanism is started, and the micro liquid hydrogen transportation inner tank is in a vacuum state; the liquid argon is gasified and mixed with the fluorescent dry powder, the colored gas generated by gasification is sprayed out from the damaged position to form a striking visual mark, a worker can visually find the damaged position at the first time without the aid of a complex detection instrument or large-area troubleshooting, and the fault diagnosis time is greatly shortened.

A hardware-in-the-loop simulation system for liquid hydrogen-superconducting hybrid energy storage, capable of improving the accuracy and reliability of a simulation result. The system comprises: a liquid hydrogen-superconducting hybrid energy storage physical system (7), a real-time simulator, and a superordinate computer. The liquid hydrogen-superconducting hybrid energy storage physical system (7) comprises: a fuel cell device (1), a water-electrolysis-based hydrogen production device (2), and a liquid hydrogen-cooled superconducting magnetic energy storage device (6). The fuel cell device (1) is configured to convert hydrogen into electric energy and provide power supply for a power system; the water-electrolysis-based hydrogen production device (2) is configured to convert electric energy into chemical energy to be stored in hydrogen; the liquid hydrogen-cooled superconducting magnetic energy storage device (6) is configured to perform liquid hydrogen energy storage and superconducting magnetic energy storage; the real-time simulator is configured to generate control signals of the liquid hydrogen-superconducting hybrid energy storage physical system (7) on the basis of operation parameters of the liquid hydrogen-superconducting hybrid energy storage physical system (7) and an operating condition of a simulated renewable energy power generation system; and the superordinate computer is configured to monitor and manage operating conditions of the real-time simulator and the liquid hydrogen-superconducting hybrid energy storage physical system (7).

The invention belongs to the technical field of hydrogen recovery, and particularly provides a recovery system of a liquid hydrogen storage tank and a control method thereof.The system comprises a temperature and pressure rising device, a storage module, an electric energy conversion module and an adsorption and emission module, the temperature and pressure rising device is connected with the liquid hydrogen storage tank, and the storage module is connected with the electric energy conversion module; the heating and boosting device is used for heating and boosting low-temperature hydrogen overflowing from the liquid hydrogen storage tank to obtain hydrogen to be recycled; the storage module is connected with the heating and boosting device through a pipeline and is used for storing the hydrogen to be recycled; the electric energy conversion module is connected with the storage module through a pipeline and is used for converting the hydrogen to be recycled into electric energy and storing the electric energy; and the adsorption and discharge module is connected with the storage module through a pipeline and is used for adsorbing and discharging the hydrogen to be recycled. Through the technical scheme provided by the invention, the safety of hydrogen recovery can be improved.

The utility model discloses an electricity-hydrogen-carbon collaborative conveying, control and utilization system, and belongs to the technical field of energy conveying. The system comprises a control system and a conveying pipeline, wherein the conveying pipeline comprises a first pipe body, a second pipe body and a third pipe body which are sequentially arranged from inside to outside; the first pipe body forms a first channel for conveying liquid hydrogen, a second channel is formed between the first pipe body and the second pipe body, the second channel is filled with liquid nitrogen, and a third channel for conveying liquid carbon dioxide is formed between the second pipe body and the third pipe body; a power cable is further arranged in the second channel and used for transmitting electric power. Cold energy in the conveying pipeline is distributed in a uniform gradient mode, multi-stage gradient utilization of the cold energy can be achieved, and the comprehensive energy utilization rate of the liquid hydrogen, liquid carbon dioxide and electric power collaborative conveying system is increased.

The invention relates to the technical field of vehicle-mounted liquid hydrogen cylinder detection, and discloses a vehicle-mounted liquid hydrogen cylinder vibration test method, which comprises the following steps: filling a gas cylinder with hollow glass beads of which the density is close to that of liquid hydrogen; the helium is cooled through a helium refrigerating device, and the helium is continuously introduced into the gas storage bottle, so that the temperature of the hollow glass beads is consistent with the temperature of the liquid hydrogen; sleeving a helium cover on the gas storage bottle, and vacuumizing the inside of the helium cover; formulating a vibration loading scheme according to the actual driving condition of the vehicle; in the vibration loading process, the concentration of helium in the helium cover is monitored in real time through a helium mass spectrometer leak detector, and if helium leakage is detected, the test is stopped; after vibration loading is finished, a helium mass spectrometer leak detector is used for detecting whether leakage occurs at the joints of the valve, the pipeline joint, the inner container and the shell of the gas storage cylinder or not; the heat insulation performance of the gas storage cylinder is judged; the structural integrity of the gas storage cylinder is detected through visual inspection and an ultrasonic detector; according to the method, liquid hydrogen working conditions are accurately simulated, test safety is guaranteed, and test efficiency is improved.

The invention discloses a multi-source data adaptive fitting method for a liquid hydrogen storage tank bench test, which comprises the following steps: synchronously acquiring multi-source sensor data in the liquid hydrogen storage tank bench test in real time, and preprocessing the data to obtain preprocessed real-time data; establishing a physical priori constraint equation based on a low-temperature thermodynamic law and a heat transfer mechanism, embedding the physical priori constraint equation into a data fitting objective function, performing physical constraint, and determining energy conservation, phase equilibrium and heat transfer boundary conditions required to be met by a fitting result; extracting data features of the preprocessed real-time data, matching the data features with a preset working condition feature library, and performing working condition identification to obtain a current test working condition identifier; adjusting regularization parameters by adopting an iteration method according to the current test working condition identifier, the data fitting residual error and the noise level; and carrying out data fitting by combining physical constraints, current test working condition identifiers and the adjusted regularization parameters, and inverting the state parameters in the storage tank. The algorithm can provide a reliable basis for design optimization and safety evaluation of the liquid hydrogen storage tank.

The invention discloses a liquid hydrogen production device and a working method thereof.The liquid hydrogen production device comprises a first heat exchanger, a pipe mechanism, a conversion mechanism, a cooling mechanism and a valve bank, a second cooling medium inlet, a first inlet and a first outlet are formed in the first heat exchanger, and the pipe mechanism comprises a first cooling pipe; and the first cooling pipes are connected with the first heat exchanger. The valve set comprises a second throttling valve, the second throttling valve is installed on a first cooling pipe, the first cooling pipe is communicated with a first outlet and a second cooling medium inlet, and circulating hydrogen entering the first heat exchanger from the first inlet exchanges heat with circulating hydrogen cooled and depressurized through the cooling mechanism. And the first cooling medium flows into the first cooling pipe from the first outlet, is throttled by the second throttling valve and enters the first heat exchanger from the second cooling medium inlet. The raw material hydrogen is cooled through the mode that expansion continuous refrigeration of the cooling mechanism cooperates with high-pressure throttling refrigeration, energy is saved, and meanwhile the product hydrogen with the parahydrogen content reaching 97% is produced.

The utility model relates to liquid hydrogen liquid oxygen spacer heat conductivity coefficient appearance, including base, side plate and top plate, be provided with the base on the base, be provided with a plurality of heat insulating plates fixedly on the base, the heat insulating plate is fixed with the heat conduction plate, the top of base is provided with the lifting plate, the top plate's upper end is fixed with the cylinder, the cylinder has the expansion joint, and the expansion joint is fixedly connected with the upper surface of lifting plate, the lower surface of lifting plate is fixed with a plurality of heating plates, and one side of heating plate away from heat conduction plate and one side of heat conduction plate away from heating plate all are provided with temperature sensor, and the side of base is fixed with the reference plate, and the upper end surface of reference plate and the upper end surface of heat conduction plate are located same horizontal plane, and the side of lifting plate is fixed with the mounting plate, and the mounting plate is fixed with laser range finder, and laser range finder has laser emission end, and laser emission end is towards reference plate, and laser emission end and the lower surface of heating plate are located same horizontal plane, the utility model discloses that the accuracy of detection result has been improved, and saves time and labour, and the efficiency is high.

The utility model relates to the technical field of tail gas absorption, in particular to a liquid hydrogen chloride steel cylinder tail gas absorption device. The liquid hydrogen chloride steel cylinder tail gas absorption device comprises a falling film absorber, the falling film absorber is connected with an acid liquor circulating tank through a U-shaped bent pipe, an absorption area and a liquid outlet area are arranged in the falling film absorber, the acid liquor circulating tank is connected with the absorption area through a pipeline, a hydraulic jet pump is arranged above the acid liquor circulating tank, and the liquid outlet area is connected with the absorption area through a pipeline. The liquid outlet area is connected with the hydraulic jet pump through a connecting pipeline. Through the synergistic effect of the falling film absorber, the acid liquor circulating tank, the hydraulic jet pump and the like, the device realizes efficient absorption of the tail gas of the hydrogen chloride steel cylinder. Due to the design of the absorption area and the liquid outlet area in the falling film absorber and the arrangement of the tubes, hydrogen chloride gas is in full contact with absorption water, the absorption efficiency is greatly improved, the content of hydrogen chloride in tail gas is effectively reduced, and pollution to the environment is reduced.

The utility model provides a boil-off gas utilization device system for a liquid hydrogen transport ship and an arrangement structure of the boil-off gas utilization device system. The boil-off gas utilization device system for the liquid hydrogen transport ship comprises a liquid hydrogen storage device, a methanol preparation device and a methanol storage device which are connected in sequence, the vapor utilization device system for the liquid hydrogen transport ship further comprises a decarburization device, a methanol dual-fuel boiler and a methanol dual-fuel power generation device, wherein the methanol dual-fuel boiler and the methanol dual-fuel power generation device are arranged in parallel. The boil-off gas utilization device for the liquid hydrogen transport ship is good in system economy, high in safety, green, low in carbon and suitable for large-scale application and popularization.

The invention relates to an online diagnosis and early warning method for performance degradation of a multi-layer thermal insulation material in a liquid hydrogen temperature zone, and belongs to the technical field of extremely low temperature thermal insulation material testing. According to the method, an acoustic sensing module and a controllable micro excitation module are integrated on a traditional heat leakage testing system; the method comprises the following steps: collecting acoustic emission signals generated by a material under thermal cycle and active micro-excitation, extracting multi-dimensional characteristic parameters, and establishing a correlation diagnosis model of acoustic emission characteristics and the internal pre-tightening force state and macroscopic thermal performance of the material in combination with standard sample data in a known state; by utilizing the model, the internal mechanical contact state of the to-be-tested material can be evaluated in an online, lossless and real-time manner, and early warning can be performed on the degradation trend of the heat insulation performance of the to-be-tested material. According to the method, the defects of lagging and destructiveness of a traditional testing method are overcome, the root cause of performance degradation is monitored, and a guarantee is provided for reliability evaluation and service life prediction of the material.

The embodiment of the invention relates to the technical field of refrigeration, in particular to a low-temperature propellant storage system and method. The system is characterized in that a compressor compresses helium, a first part of compressed helium flows into a circulating refrigeration assembly, and a second part of compressed helium flows into a heating assembly; the circulating refrigeration assembly is used for cooling the first part of helium, liquid hydrogen stored in the liquid hydrogen storage tank and liquid oxygen stored in the liquid oxygen storage tank are cooled through the cooled first part of helium, and the cooled first part of helium flows back to the compressor; and the heating assembly is used for heating liquid oxygen flowing out of the liquid oxygen storage tank and liquid hydrogen flowing out of the liquid hydrogen storage tank through the second part of helium to obtain gaseous oxygen and gaseous hydrogen, the gaseous oxygen and the gaseous hydrogen are conveyed to the engine, and the second part of helium flows back to the compressor after heating treatment. According to the technical scheme, high-quality cooling capacity in the storage box can be effectively utilized, and the circulating refrigeration efficiency is improved.

The invention discloses a liquefied hydrogen production device, and relates to the technical field of low-temperature gas liquefaction. The helium expansion refrigeration system comprises a first branch assembly and a second branch assembly, the first branch assembly exchanges heat with the liquid nitrogen precooling system, the second branch assembly comprises a plurality of expansion machines, and the expansion machines are located at the outlet end of the first branch assembly and used for further cooling helium conveyed by the first branch assembly; and the liquid hydrogen production system exchanges heat with the first branch assembly and the second branch assembly in sequence to form liquid hydrogen, a catalyst storage piece is arranged on a heat exchange path of the liquid hydrogen production system, and a catalyst in the catalyst storage piece is used for achieving conversion from orthohydrogen to parahydrogen. The liquefied hydrogen production device integrates a liquid hydrogen production system, a liquid nitrogen pre-cooling system and a helium expansion refrigeration system, catalytic conversion of ortho-parahydrogen can be carried out in the raw material hydrogen cooling process, the cold energy utilization efficiency is improved, energy consumption is reduced, and the integration degree of the device is improved.

The invention belongs to the technical field of clean energy smelting, and particularly relates to an organic liquid hydrogen storage and fuel cell integrated system and method for hydrogen energy steelmaking. Comprising a solid oxide fuel cell module, an organic liquid hydrogen storage module and a hydrogen energy steelmaking module, high-temperature heat energy and electric energy generated by the solid oxide fuel cell module are transmitted to the hydrogen energy steelmaking module, and medium and low-temperature heat energy generated by the solid oxide fuel cell module is transmitted to the organic liquid hydrogen storage module; the organic liquid hydrogen storage module supplies hydrogen to the solid oxide fuel cell module and the hydrogen energy steelmaking module; a solid oxide fuel cell is adopted and is matched with organic liquid for hydrogen storage, so that efficient and stable hydrogen storage, heat supply and power supply integrated service is provided for hydrogen energy steelmaking; the organic liquid is used for storing hydrogen, so that a stable hydrogen storage service can be provided for hydrogen energy steelmaking, and a hydrogen storage service can also be provided for a solid oxide fuel cell.

The invention discloses a liquid hydrogen storage tank calculation model method based on an equivalent thermal resistance method, and relates to the technical field of low-temperature liquid hydrogen storage tanks. According to the method for constructing the multi-dimensional thermal resistance network of the liquid hydrogen storage tank, the heat transfer process of multi-field coupling inside and outside the storage tank can be accurately simulated. According to the algorithm, a complex heat transfer model is simplified into a series and parallel thermal resistance combination, the influence of geometric structures on heat transfer is considered, and the problem that a traditional calculation method is inaccurate in calculation result when facing different geometric structures is solved. According to the model, the dynamic change rule of the gas phase and the liquid phase of hydrogen along with pressure is considered, the problem that calculation deviation is caused by neglecting environmental influence in a traditional method is solved, the liquid hydrogen evaporation rate is used as a final result for evaluation, thermal resistance of all parts can be accurately marked, and the model is convenient to apply in liquid hydrogen storage tank design and high in practicability. And a designer can be assisted to quickly find out the direction needing to be optimized.

The invention provides a seawater hydrogen production and storage system and a seawater hydrogen production and storage process using offshore wind power. The seawater hydrogen production and storage system comprises a permeable membrane system, a two-stage RO membrane system, an EDI ultrapure water system and a hydrogen production and storage system, and the permeable membrane system, the two-stage RO membrane system, the EDI ultrapure water system and the hydrogen production and storage system are connected in sequence; in the seawater purification direction, the permeable membrane system comprises a forward osmosis module and permeable membrane modules, the forward osmosis module comprises a forward osmosis membrane and absorption liquid, the absorption liquid is selected from a sodium chloride solution with the mass concentration of 3-15%, and the number of the permeable membrane modules connected in series is 1-3. According to the seawater hydrogen production and storage system, the seawater is subjected to graded purification, the purified seawater can be directly discharged to the sea, the purified ultrapure water can thoroughly avoid a series of problems of chlorine, calcium and magnesium precipitation and the like in the subsequent water electrolysis hydrogen production process, and liquid hydrogen storage oil is directly prepared through the hydrogen production and storage system and is convenient to transport on the sea and other scenes.

The application relates to a liquid hydrogen hydrogenation station pressurizing system and a use method thereof. The liquid hydrogen hydrogenation station pressurizing system comprises a liquid hydrogen storage tank (10), a pressurizing assembly (20) and a refrigeration assembly (30), the liquid hydrogen storage tank (10) is connected with the pressurizing assembly (20) through a liquid hydrogen pipeline, a gas outlet of the pressurizing assembly (20) is connected back to the liquid hydrogen storage tank (10) through a gas hydrogen pipeline, and the refrigeration assembly (30) for condensing gas hydrogen is arranged between the liquid hydrogen pipeline and the gas hydrogen pipeline. Compared with the prior art, the application has the advantages of being capable of adjusting the liquid hydrogen storage tank pressure, reducing hydrogen loss, being capable of coping with liquid hydrogen tumbling, and the device being simple to build.

The invention discloses a liquid hydrogen heat exchange experimental device, which relates to the field of aero-engines and comprises a liquid hydrogen loop, a nitrogen heating loop, a test section, a measurement and control module and a safety protection module, wherein the liquid hydrogen loop is used for providing supercritical hydrogen meeting a preset working condition; the nitrogen heating loop is used for heating nitrogen to a target working condition temperature and providing a convection heating environment for the test section; the test section comprises a straight pipe type sealing sleeve, supercritical hydrogen circulates in an inner pipe of the straight pipe type sealing sleeve, and high-temperature nitrogen circulates in an outer pipe of the straight pipe type sealing sleeve; the measurement and control module comprises a controller, and the controller and the heater are configured to dynamically adjust the flow of hydrogen and nitrogen and the heating power of nitrogen so as to simulate transient working conditions; the safety protection module is used for conducting steady state judgment and safety monitoring according to data collected by the liquid hydrogen side sensor and the nitrogen side sensor. According to the invention, the convective heat transfer performance of supercritical hydrogen can be accurately measured under low-temperature, high-pressure and safe conditions, and reliable experimental support is provided for thermal management of a hydrogen fuel aero-engine.

This invention relates to the field of energy technology and discloses a method, apparatus, and storage medium for assessing the liquid level of a cold box in a hydrogen liquefaction unit. This invention combines the instantaneous rate curve of liquid hydrogen production with multiple preset experimental sampling logics, utilizing a preset cold box testing device to differentially obtain multiple sets of physical property parameters corresponding to the cold box during the hydrogen liquefaction process. Furthermore, by using a preset cold release convection heat transfer coefficient relationship, the target cold release convection heat transfer coefficient is determined, providing support for determining the defrosting frequency. This avoids frequent fixed-cycle defrosting operations and can more accurately guide the defrosting operation of the dynamic process combining the evaporation of the working fluid in the hydrogen liquefaction cold box and the injection of the working fluid into the cold box, thereby improving the technical and economic efficiency of liquid hydrogen production to a certain extent. Furthermore, by combining the determined defrosting frequency with the liquid level assessment results of the cold box in the hydrogen liquefaction unit, the operational efficiency of the dynamic process combining the evaporation of the working fluid in the cold box and the injection of the refrigerant into the cold box is improved.

The application relates to an inner liquid hydrogen pump pool type liquid hydrogen storage tank, and relates to the technical field of hydrogen energy equipment. The liquid hydrogen storage tank comprises a tank body, a filling pipeline is communicated with the tank body; a pump pool is arranged on the tank body, and the pump pool is used for accommodating a liquid hydrogen pump; one end of the pump pool is located outside the tank body, the other end of the pump pool extends into the tank body, and a liquid hydrogen inlet is coaxially and penetratingly arranged at the end of the pump pool in the tank body. The pump pool is arranged in the tank body, so that the liquid hydrogen pump can be arranged in the tank body, the liquid hydrogen pump and the tank body do not need to be connected through a pipeline, the leakage risk in the liquid hydrogen conveying process between the liquid hydrogen pump and the tank body is effectively reduced, and the safety hidden danger is reduced. Meanwhile, heat transfer in the liquid hydrogen conveying process is reduced, the evaporation loss of the liquid hydrogen is reduced, and the storage efficiency and economic benefits of the liquid hydrogen are improved.

The utility model relates to the technical field of liquid hydrogen storage, in particular to a heat exchange hydrogenation charging system for a liquid hydrogen skid-mounted hydrogen refueling station. The bottom of the liquid hydrogen storage tank is connected with a liquid inlet of the self-booster through a self-boosting pipeline, a gas outlet of the self-booster is connected with the top of the liquid hydrogen storage tank through a gas pipeline, the top of the liquid hydrogen storage tank is connected with the vaporizer, the vaporizer is connected with the first hydrogen storage bottle set through a pipeline, and the first hydrogen storage bottle set is connected with the hydrogen fuel cell. The hydrogen fuel cell is connected with the charging pile; the bottom of the liquid hydrogen storage tank is connected with a booster cavity liquid inlet of a plunger pump through a liquid inlet pipeline, a liquid outlet of the plunger pump is connected with a heat exchanger through a pipeline, the heat exchanger is connected with a second hydrogen storage bottle group through a pipeline, the second hydrogen storage bottle group is connected with a hydrogen cooler, and the hydrogen cooler is connected with a hydrogen hydrogenation machine; the self-booster does not need to be additionally provided with a booster pump, electric energy is saved, the plunger pump has the advantages of being high in pressure and large in flow, the hydrogenation speed is high, and the hydrogenation requirement can be met in the hydrogenation peak period.

Methods and systems providing a process for cooling and liquefying a purified gaseous hydrogen feed stream to a liquid hydrogen stream that may be stored in a liquid hydrogen storage tank, as well as a system wherein ortho-hydrogen (o-H2) contained in the purified gaseous hydrogen feed stream may be converted to para-hydrogen (p-H2) through serial low-temperature catalytic converters along with cooling process from normal ambient temperature (300K) to the liquefied temperature (about 20K) of the hydrogen.