971 results about "Hydrogen flow" patented technology

The invention discloses an intelligent hydrogen production system and method.The intelligent hydrogen production system comprises a water supply device, a hydrogen production device, a purification device, a hydrogen conveying device, a pressure relief device, a system monitoring unit and a system control unit.The liquid level of a water tank is detected through a first liquid level meter, and the temperature of pure water of the water tank is detected through a first temperature sensor; the conductivity of water treated by the water machine is detected through the first conductivity meter so as to judge the purity degree of the water, the conductivity of electrolyzed water entering the electrolytic bath is detected through the second conductivity meter, the temperature of the electrolyzed water in the electrolytic bath is detected through the second temperature sensor, and it is guaranteed that the water quality and the water temperature in the electrolytic bath meet the electrolysis requirement. The liquid level of separated water in the water-vapor separator is detected through the second liquid level meter, the dew-point temperature of hydrogen is detected through the dew-point meter, and the actual output flow of hydrogen flowing through the hydrogen outlet is detected through the flow meter. The water temperature, the water level, the hydrogen flow, the conductivity and the like can be monitored, safe and efficient operation of equipment is ensured, and potential safety hazards are prevented.

The invention discloses a fuel cell output voltage control method and system based on fuzzy neural network PID, and the method comprises the steps: building an air-cooled fuel cell voltage model based on an MATLAB / Simulink simulation platform, and obtaining the temperature changes of an air-cooled fuel cell under different working conditions; establishing an air-cooled fuel cell test bench, and obtaining a polarization curve of output voltage changing along with current; according to experimental data, calibrating the semi-empirical equation by adopting a nonlinear least square method, and comparing experimental results to verify the accuracy of the model; the input hydrogen flow is changed through the PID controller, so that stable control of the output voltage of the galvanic pile is realized, and the power generation performance of the battery is improved; a fuzzy neural network is adopted to optimize a PID controller, control parameters of PID are adjusted in a self-adaptive mode according to the error between expected voltage and actual voltage and the error change rate, and therefore a better temperature control effect is achieved. The method has the advantages of high robustness, high response speed and the like, and ensures that the voltage output of the fuel cell stack is maintained at a fixed preset value.

The invention belongs to the technical field of unmanned aerial vehicles, and discloses a hydrogen-lithium hybrid power unmanned aerial vehicle and a control system and a control method thereof. The control system of the hydrogen-lithium hybrid power unmanned aerial vehicle comprises a control unit, and a power supply control module, a temperature control module, a gas control module and an exhaust module which are in communication connection with the control unit, wherein the power supply control module collects the power supply quantity of a hydrogen fuel cell and a lithium battery and controls and distributes the power supply quantity to drive the unmanned aerial vehicle to start and fly; the temperature control module is used for radiating and cooling the hydrogen fuel cell; the gas control module is used for detecting hydrogen pressure and controlling hydrogen flow; the exhaust module is used for controlling exhaust of the hydrogen fuel cell. According to the method, the power supply quantity of the hydrogen fuel cell and the lithium battery is optimally controlled and distributed in the flight control process of the unmanned aerial vehicle, so that the problem of different requirements of the unmanned aerial vehicle on energy in the rapid starting and flight processes is solved, the energy utilization efficiency of the hydrogen-lithium hybrid power unmanned aerial vehicle is improved, and the application range of the hydrogen fuel cell on the unmanned aerial vehicle is expanded.

A fuel system for a gas turbine engine. The fuel system comprises a fuel offtake configured to divert a portion of hydrogen fuel from a main fuel conduit, a burner configured to burn the portion of hydrogen fuel diverted from the main fuel conduit and at least first and second heat exchangers. The first heat exchanger is configured to transfer heat from exhaust gasses produced by the burner to hydrogen fuel in the main fuel conduit and the second heat exchanger is provided upstream in hydrogen flow of the first heat exchanger and is configured to transfer heat from a further heat exchange fluid to hydrogen fuel in the main fuel conduit. In an embodiment, the further heat exchange fluid is compressor bleed air bled from a core compressor of the gas turbine engine.

The invention provides a method for growing an oversized diamond polycrystalline film. The method comprises the following steps: S1, cleaning and drying a monocrystalline silicon wafer at room temperature; s2, carrying out pretreatment seed crystal on the monocrystalline silicon wafer, covering a diamond nanocrystalline layer on the silicon surface, and putting the monocrystalline silicon wafer into MPCVD (Microwave Plasma Chemical Vapor Deposition) equipment; s3, the cavity is vacuumized, then hydrogen is introduced for purging, and then vacuumizing is conducted again; then hydrogen is introduced, the air pressure is regulated and controlled to be 5-8 torr, and starting is started to ignite the plasma; s4, the microwave power is increased to 70 KW to 75 KW at the speed of 4.5 KW / min to 5.5 KW / min, the air pressure is increased to 165 torr to 180 torr at the speed of 10 torr / min to 30 torr / min, and the temperature is increased to 900 DEG C to 950 DEG C at the speed of 60 DEG C / min; s5, introducing growth gas, wherein the flow rate of hydrogen is 5000-6000 sccm, the flow rate of methane is 100-150 sccm, the flow rate of oxygen is 5-8 sccm, the flow rate of nitrogen is 1-2 sccm, and the flow rate of argon is 800-1000 sccm; and S6, after the growth is finished, cooling at a rate of 30 DEG C / min, and introducing nitrogen into the cavity for vacuum breaking until the temperature is reduced to room temperature, so as to obtain the oversized diamond polycrystalline film. The size of the oversized diamond polycrystalline film reaches 12 inches.

The invention discloses an integrated adjustable ejector for a vehicle-mounted hydrogen supply circulating system, which relates to the technical field of ejectors for vehicle-mounted hydrogen supply circulating systems and comprises a hydrogenation pipeline, a working pipeline and a circulating return pipeline. The circulating return pipeline comprises an integrated adjustable ejector, a hydrogen compressor, a steam-water separator, a circulating return pipeline one-way valve and a pressure reducing valve; the integrated adjustable ejector comprises a shell, a hydrogen inlet and outlet, a storage cavity, a valve, a control device, an execution controller and a monitoring and temperature control module. The integrated adjustable ejector is installed on the circulating backflow pipeline, the monitoring and temperature control module is integrated on the ejector, the hydrogen flow, pressure and temperature are monitored in real time, and the hydrogen temperature is adjusted so that stable operation can be achieved; the fuel cell reactor hydrogen flow sensor converts flow required by a fuel cell reactor into an electric signal, transmits the electric signal to the control device, and controls the execution controller to adjust the valve, so that dynamic optimization is realized, and various working condition requirements of a hydrogen fuel cell automobile are met.

A green ammonia production hydrogen load prediction method based on sparse attention variational Bayes comprises the following steps: acquiring historical data of a green ammonia electrolysis hydrogen production industry through an acquisition sensor, and dividing the historical data into a training set, a verification set and a test set; performing standardization processing on the training set, and constructing an SVAE soft measurement training model; determining a final objective function suitable for SVAE; and performing real-time online prediction on the output target variable by using the current input characteristic variable by adopting the trained SVAE. The SVAE combines CNNs, PSSAM and a cross attention mechanism, and captures a long-term dependency relationship and a complex mutual relationship in industrial data. An optimized objective function is formulated in combination with variational reasoning and a Monte Carlo method and is used for offline training. The SVAE has remarkable advantages in the process of accurately predicting the hydrogen flow and optimizing the production process of the green ammonia, the production efficiency is improved, and the energy consumption is reduced.

The invention discloses a hydrogen storage and transportation system under a wind-solar hydrogen production project and a control method. The hydrogen storage and transportation system at least comprises a hydrogen flowing pipeline and a water flowing pipeline, the hydrogen flowing pipeline at least comprises a first compressor, a low-pressure hydrogen storage container, a third compressor and a second heat exchanger which are connected in sequence; the first compressor is further sequentially connected with a second compressor, a high-pressure hydrogen storage tank, an eighth valve connected with the pressure reducing valve in parallel and a third compressor; the second compressor, the high-pressure hydrogen storage tank and the low-pressure hydrogen storage container are connected in parallel; the high-pressure hydrogen storage tank is connected with the pressure reducing valve through a ninth valve connected with the third compressor in parallel; the first compressor pressure is smaller than the third compressor pressure and smaller than the second compressor pressure; the water flow pipeline at least comprises a first heat exchanger, a first water pump and a second water pump which are sequentially arranged in the water flow direction. The second water pump is in fluid communication with the second heat exchanger; the first heat exchanger is arranged on the cooling water pipeline corresponding to the compressor. The multi-aspect requirements of stable output, efficient storage, energy conservation, environmental protection and the like can be met.

The invention relates to the technical field of fuel cells, in particular to a method and system for accurately controlling the hydrogen stoichiometric ratio of a fuel cell, and the method comprises the steps: firstly, obtaining a quantitative anode health state value through a fusion calculation model by collecting load current, anode inlet and outlet pressure, temperature, high-frequency resistance and other multi-source signals in real time; a feed-forward model based on a load current change rate predicts sudden change of hydrogen demand, and an optimal hydrogen flow instruction is jointly generated in combination with output of a PID controller which adaptively adjusts parameters according to a health state value. According to the method, the integrated diagnosis parameter, namely the anode health state value, is created, so that the internal state of the fuel cell can be accurately perceived and prospectively judged. Through deep fusion of multi-source heterogeneous information such as high-frequency resistance, anode pressure difference, current and temperature, a comprehensive index capable of comprehensively and quantitatively reflecting anode water content, gas concentration and runner smoothness is generated.

The invention discloses an efficient ammonia decomposition hydrogen production system based on the Joule heating effect and belongs to the technical field of clean energy. The system is composed of an ammonia supply module, a Joule thermally driven ammonia decomposition reaction module and a hydrogenation module. Wherein the ammonia supply module consists of a liquid ammonia storage device, a vaporizing chamber and an ammonia gas storage device; the Joule thermally-driven ammonia decomposition reaction module consists of an ammonia gas flow control valve, a reaction tube gas inlet, a reaction tube gas outlet, a Joule heating electrode tip, a direct-current power supply, a temperature sensor, a thermal insulation layer, a reaction tube, a catalyst and a stainless steel alligator clip; the hydrogenation module is composed of a hydrogen purifying and drying device, a hydrogen compressor, a hydrogen cooling unit, a high-pressure hydrogen storage tank, a hydrogen flow control valve and a hydrogenation machine. The whole process can be started and stably output within one second, the conversion rate and the electrothermal conversion efficiency both exceed 90%, low energy consumption, quick response and safe operation are achieved, the system is particularly suitable for hydrogen refueling station construction in a future hydrogen energy network, and green hydrogen energy economy development is promoted.

The invention provides a high-power fuel cell hydrogen system and a control method, a high-power fuel cell comprises a plurality of galvanic pile groups, the galvanic pile groups are connected in parallel to realize power supply, each galvanic pile group comprises a plurality of galvanic pile units, the galvanic pile units are connected in series one by one, and the hydrogen system adjusts hydrogen distribution among piles according to different working conditions; a hydrogen circulation mode that the hydrogen circulation pump and the ejector are connected in parallel is adopted, so that the hydrogen circulation quantity requirements of the high-power fuel cell under different working conditions can be met; according to the control method, a PID air inlet control strategy with feedforward and a hydrogen circulation control strategy are adopted, the air inlet control strategy can achieve quick response when the working condition of the electric pile changes dynamically, the hydrogen flow and pressure are controlled more quickly and effectively, and the hydrogen circulation control strategy can meet the hydrogen flow requirements under different load working conditions; the reliability and stability of the fuel cell system are improved, the working efficiency of the high-power fuel cell system can be improved, and the service life of the high-power fuel cell system can be prolonged.

The invention discloses a solid hydrogen storage system capacity state estimation method. The method comprises the following steps of: firstly, simplifying a high-dimensional numerical calculation model into a lumped parameter model according to a chemical chemistry kinetic equation of solid hydrogen storage / desorption, and then carrying out linearization processing to obtain a state space equation and a linearization model of a solid hydrogen storage system; then designing extended Kalman filtering for monitoring the state of the solid-state hydrogen storage system, estimating the state of the solid-state hydrogen storage system at the future moment by using an extended Kalman filtering algorithm, and accordingly outputting the state of the hydrogen content SOC of the solid-state hydrogen storage system; and finally, predicting and updating the state of the solid-state hydrogen storage system through loop iteration, and adjusting the SOC estimated value of the solid-state hydrogen storage system in real time. According to the method, the phenomenon of error accumulation in hydrogen flow integration can be avoided, the SOC estimation precision is improved, meanwhile, the hydrogen content state of the system is estimated in real time under the dynamic working condition, dynamic control over system operation is guided, and errors caused by measurement noise and model uncertainty are reduced.

The invention provides a hydrogen charging management method of a solid hydrogen storage device, and relates to the technical field of hydrogen storage, the method comprises the following steps: connecting a hydrogenation gun into a first gas inlet end of the solid hydrogen storage device, and charging hydrogen with a preset hydrogen flow into the solid hydrogen storage device; controlling the exhaust end of the solid hydrogen storage device to exhaust the hydrogen subjected to heat exchange; a circulating pump is started, hydrogen exhausted from the exhaust end is input into a cooling device through a circulating pipeline to be cooled, and the cooled hydrogen is filled into the solid hydrogen storage device through a second gas inlet end of the solid hydrogen storage device through the circulating pipeline; and when the solid hydrogen storage material in the solid hydrogen storage device reaches a hydrogen absorption saturation state, hydrogen charging is stopped. The solid hydrogen storage device can be filled with hydrogen of the preset hydrogen flow, heat generated by hydrogen absorption of the solid hydrogen storage material in the solid hydrogen storage device is brought out of the solid hydrogen storage device, the solid hydrogen storage device discharges a small amount of hydrogen after hydrogenation is completed, and safety is high.

The invention relates to the technical field of hydrogen cylinder tests, in particular to a vehicle-mounted hydrogen storage cylinder liner hydrogen aging test device which comprises a test bed and a protection assembly. The test bench is connected with a protection assembly. According to the device, chippings are limited through the first limiting part, the situation that the chippings are wrapped by hydrogen to flow into the second gas pump is avoided, meanwhile, the chippings are limited through the second limiting part, the situation that the chippings are wrapped by hydrogen to flow into the second gas pump can also be avoided, and the chipping collecting effect of the chipping collecting position is improved; hydrogen is guided to flow away from one side of an included angle between the guide plate and the second baffle through the guide surface, so that influence of hydrogen flow on collection of scraps is prevented, and the situation that the scraps are wrapped by hydrogen and flow into the second gas pump, blockage is caused, and the follow-up leaked hydrogen collection effect of equipment is affected is avoided.

The invention provides a flame photometric detector and a detection method.The flame photometric detector comprises an air inlet base, a detection chamber, a flow control unit, an ignition exhaust unit and an optical detection unit, and the flow control unit comprises a first flow control assembly, a second flow control assembly and a third flow control assembly; the control unit is used for controlling the hydrogen flow, the carrier gas flow carrying a to-be-detected object and the air flow respectively, the ignition and exhaust unit is used for igniting mixed gas of hydrogen and air and discharging a combusted product, and the optical detection unit is used for detecting components and content of the to-be-detected object; the first flow control assembly, the second flow control assembly and the third flow control assembly are arranged to control the flow of hydrogen, carrier gas and air entering the detection chamber respectively, so that airflow in the detection chamber is stable, combustion flames are kept stable, and the detection efficiency is improved. The problems that the flame luminosity is not within the detection range of the optical detection unit and the flame jumps due to unstable gas flow are avoided, and the detection result is more accurate.

The invention discloses a closed cathode pure oxygen fuel cell, which comprises a fuel cell stack, the fuel cell stack comprises a gas inlet end plate, a positive electrode collector plate arranged close to one side of the gas inlet end plate, a blind end plate and a blind end collector plate arranged close to one side of the blind end plate, and a plurality of stacked bipolar plates and membrane electrode assemblies are arranged between the gas inlet end plate and the blind end plate; the gas inlet end plate is provided with a hydrogen inlet, a hydrogen outlet, an oxygen inlet and an oxygen outlet, the positive electrode collector plate, the bipolar plate and the membrane electrode assembly are provided with an oxygen common channel and a hydrogen common channel, and the bipolar plate is provided with an oxygen flow channel and a hydrogen flow channel; the oxygen inlet and the oxygen outlet are communicated through the oxygen common channel and the oxygen flow channel to form an oxygen flow path; and the hydrogen inlet and the hydrogen outlet are communicated through the hydrogen public channel and the hydrogen flow channel to form a hydrogen flow path. Compared with a traditional fuel cell, the fuel cell provided by the invention has the advantages that the stability and the endurance are greatly improved, and the problem of poor performance of the traditional fuel cell is improved.

The utility model relates to the technical field of chemical engineering, provides an automatic chlorine-hydrogen flow ratio control device for a hydrochloric acid synthesis furnace, and solves the problem that the ratio of hydrogen to chlorine in the hydrochloric acid synthesis furnace cannot reach a theoretical set value due to design defects of the conventional device. Comprising a hydrochloric acid synthesis furnace, a hydrogen buffer tank and a chlorine buffer tank, the hydrogen buffer tank and the chlorine buffer tank are connected with the hydrochloric acid synthesis furnace, a hydrogen flow meter and a hydrogen purity detector are arranged between the hydrogen buffer tank and the hydrochloric acid synthesis furnace, and a chlorine flow meter and a chlorine purity detector are arranged between the chlorine buffer tank and the hydrochloric acid synthesis furnace. The online hydrogen purity detector and the chlorine purity detector are additionally arranged, the flow of hydrogen and chlorine is subjected to proportional control, the adding amount of hydrogen and chlorine is automatically adjusted, automatic adjustment is achieved, it is guaranteed that the ratio of hydrogen to chlorine reaches a theoretical set value, and then it is guaranteed that the concentration of finished hydrochloric acid is qualified.

The invention discloses a hydrogen fuel cell stack which comprises a pair of end plates, a plurality of cell units are stacked between the pair of end plates, each cell unit comprises a cathode plate and an anode plate, each end plate is provided with an end plate connecting hole, the cathode plate in each cell unit is provided with a cathode plate connecting hole, and the anode plate in each cell unit is provided with a cathode plate connecting hole. The anode plate in each battery unit is provided with an anode plate connecting hole, the end plate connecting hole corresponds to the cathode plate connecting hole of each cathode plate and the anode plate connecting hole of each anode plate, and the end plates and all the battery units are fixed through the end plate connecting holes, the cathode plate connecting holes and the anode plate connecting holes; an air flow field capable of spirally conveying air from inside to outside is arranged on the plate surface of each negative plate; and a hydrogen flow field capable of spirally conveying hydrogen from outside to inside is arranged on the plate surface of each anode plate. The method has the advantage that the condition that the middle of the polar plate is expanded and bulged due to uneven heating in the working process of the electric pile can be effectively prevented.

The invention discloses high-concentration nano-bubble hydrogen water production equipment, which belongs to the technical field of water treatment.The high-concentration nano-bubble hydrogen water production equipment comprises an electrolytic hydrogen production unit, a sucking pump, a water suction pump, a high-pressure pipeline, a water outlet pipeline, a high-pressure gas spray head, a high-pressure water spray head and a rotating bin, the rotating bin freely rotates on the peripheries of the high-pressure pipeline and the water outlet pipeline, and a water outlet nozzle is arranged on the outer wall of the rotating bin; the collecting bin is arranged on the rotating bin in a sleeving mode, and the rotating bin is rotationally connected into the collecting bin. Hydrogen is sprayed out from the high-pressure gas spray head, hydrogen water is sprayed out from the high-pressure water spray head at the same time, then hydrogen flow and hydrogen water flow generate jet flow hedging, the hydrogen water can be segmented through the jet flow hedging, then the hydrogen is fully dissolved in the hydrogen water, and in the process, through cutting of the hydrogen flow, the hydrogen can be fully dissolved in the hydrogen water. And thus, the hydrogen bubbles are cut to nano-scale.

The invention belongs to the technical field of functional sugar alcohol hydrogenation, and particularly relates to a system and a method for intelligently controlling a reaction kettle in a functional sugar alcohol hydrogenation process. Comprising a temperature sensor TT, a pressure sensor PT, a liquid level sensor LT, a hydrogen concentration sensor TZT and a spectrum sensor, and the sensor networks are arranged on a reaction kettle body, a feeding pipeline, a condenser and a hydrogen recovery device. The device is used for collecting temperature, pressure, liquid level and hydrogen concentration in the reaction kettle and spectral data of an outlet sugar alcohol product in real time. The control execution layer comprises a PLC (Programmable Logic Controller), a dynamic valve controller, temperature control equipment and a stirrer speed regulation module; and the dynamic valve controller is connected to the hydrogen supply pipeline and the feeding pump. The hydrogen flow, the temperature and the stirring speed are adjusted in real time through AI dynamic optimization, the sugar alcohol conversion rate is increased to 5%, and the conversion rate fluctuation range is reduced to + / -0.5%.

The invention relates to the technical field of unmanned aerial vehicle power systems, in particular to a low-altitude unmanned aerial vehicle hydrogen-electricity hybrid energy management system and control device.According to the low-altitude unmanned aerial vehicle hydrogen-electricity hybrid energy management system and control device, the residual hydrogen amount can be accurately quantified through combined collection and fusion calculation of hydrogen flow signals and air pressure signals; and the opening state of the proportional valve and the air inlet valve is adjusted in real time under data driving, so that the hydrogen input is matched with the actual power requirement, the voltage, the current and the temperature are synchronously monitored, and fluctuation feature extraction and life parameter calibration are performed on a power output sequence. The operation health degree and the life loss trend of the fuel cell can be dynamically obtained before power distribution, an accurate reference basis is provided for follow-up power allocation, the internal resistance change trend is measured and calculated through voltage and current sampling, and dynamic adjustment of the charge-discharge depth and charge-discharge process parameters is carried out in combination with the health degree. And the usability and the load capacity of the lithium battery are accurately represented.

A fuel system (300) for a gas turbine engine (203). The fuel system comprises a fuel offtake (302) configured to divert a portion of hydrogen fuel from a main fuel conduit (217), a burner (218) configured to burn the portion of hydrogen fuel diverted from the main fuel conduit (217) and at least first and second heat exchangers (306, 310). The first heat exchanger (306) is configured to transfer heat from exhaust gasses produced by the burner (218) to hydrogen fuel in the main fuel conduit (217) and the second heat exchanger (310) is provided upstream in hydrogen flow of the first heat exchanger (306) and is configured to transfer heat from a further heat exchange fluid to hydrogen fuel in the main fuel conduit (217). In an embodiment, the further heat exchange fluid is compressor bleed air bled from a core compressor of the gas turbine engine.

The fuel cell system comprises a gas source, a heat exchange device and a galvanic pile, a hydrogen source is connected with the heat exchange device, hydrogen output by the hydrogen source flows through the heat exchange device, the heated hydrogen is input into the galvanic pile, air output by an air source is input into the galvanic pile, and the galvanic pile is connected with the heat exchange device. The hydrogen and the air are subjected to electrochemical reaction in the electric pile; the electric pile is connected with the heat exchange device, and tail gas of the electric pile flows through the heat exchange device. Before hydrogen and air are input into the galvanic pile according to the set volume ratio, the hydrogen flows through the heat exchange device to be preheated and then is input into the galvanic pile, the hydrogen and the air are subjected to an electrochemical reaction in the galvanic pile to generate tail exhaust fluid, and the tail exhaust fluid flows through the heat exchange device to be subjected to heat exchange and then is discharged. In the whole process, hydrogen and air are subjected to electrochemical reaction in the galvanic pile to generate tail exhaust fluid, and the tail exhaust fluid is used for preheating the hydrogen, so that the utilization of heat carried by the tail exhaust fluid is realized.

The invention relates to the technical field of hydrogen energy storage and control, and discloses a hydrogen storage tank pressure and temperature control method and device based on model predictive control, and the method comprises the steps: determining a hydrogen state equation of a hydrogen storage tank, and constructing a hydrogen mass conservation equation and a hydrogen energy conservation equation; based on the hydrogen mass conservation equation and the hydrogen energy conservation equation, a state prediction model of the hydrogen storage tank state related to the net hydrogen flow change is established, and the hydrogen storage tank state comprises hydrogen pressure and hydrogen temperature; a target function is constructed with the hydrogen storage tank state and the net hydrogen flow as control targets, and constraint conditions are configured; on the basis of the input net hydrogen flow sequence of the state prediction model and the predicted hydrogen storage tank state sequence output by prediction, the target function is subjected to minimum solving, and the optimal net hydrogen flow sequence is obtained through iteration; and adjusting an inlet / outlet valve of the hydrogen storage tank based on the optimal net hydrogen flow sequence. The operation efficiency of the hydrogen storage system can be improved.

The present invention discloses a fuel cell hydrogen circulation component, including a shell, a one-way valve, a position sensor, a circulation pump and a controller. A first cavity, a second cavity, a main channel and a branch channel are provided inside the shell, a first interface and a second interface are provided on the side wall of the first cavity, and a third interface is provided on the side wall of the branch channel. The upper end of the one-way valve is hingedly mounted on the side wall of the second cavity, so that the one-way valve completely blocks the first connecting hole when it droops naturally. The position sensor is installed in the second cavity for sensing the angle of the one-way valve. The position sensor is electrically connected to the controller, and the controller is electrically connected to the circulation pump. Compared with the prior art, the fuel cell hydrogen circulation component of the present invention can not only realize the basic function of the one-way valve to prevent gas backflow, but also be used to monitor the hydrogen flow through the one-way valve. It is not only convenient to calculate the hydrogen utilization rate, but also convenient to realize the closed-loop control of the circulation pump speed according to the hydrogen flow.

The invention discloses a gas-liquid separation device for a fuel cell and hydrogen supply equipment. The gas-liquid separation device comprises a shell, and the shell is provided with a first inlet, a first outlet, a second inlet, a second outlet and a water outlet; an accommodating space is arranged in the shell, at least one baffle is arranged in the accommodating space, the accommodating space is divided into a plurality of mutually independent subspaces by the at least one baffle, the baffle is provided with a via hole, and the adjacent subspaces are communicated through the via hole; the first inlet is communicated with one subspace in the plurality of subspaces, and the first outlet is communicated with the other subspace in the plurality of subspaces; the water outlet is communicated with at least one subspace in the plurality of subspaces; the baffle is internally provided with a new hydrogen flow channel, and the second inlet and the second outlet communicate with the new hydrogen flow channel. According to the scheme, the gas-liquid separation of the waste hydrogen can be more thorough, and the temperature of the new hydrogen and the temperature of the waste hydrogen tend to be the same, so that liquid water is not easily generated in the galvanic pile, and the anode of the galvanic pile can be prevented from being flooded.

The invention belongs to the technical field of diamond preparation, and discloses a high-speed preparation method of a thick diamond film, which comprises the following steps of: uniformly spreading diamond particles on a substrate by using absolute ethyl alcohol, placing the substrate on a sample table in an MPCVD (Micro-Pressure Chemical Vapor Deposition) system, and introducing hydrogen, slowly heating the interior of the MPCVD system to a preset cleaning temperature so as to perform plasma cleaning on the surface of the substrate, and growing the substrate on the basis of the growth hydrogen flow, the methane gas flow, the growth power, the growth temperature and the growth air pressure through a segmented growth method, promoting the growth of nano-scale diamonds in gaps of the diamond particles on the surface of the substrate to connect the diamond particles to obtain a compact and uniform rough thick diamond film, and polishing the rough thick diamond film to obtain a thick diamond film with a smooth surface; the thick diamond film is grown on the substrate on which a layer of diamond particles are paved by using hydrogen and methane gas through a segmented growth method, so that the high-speed preparation efficiency of the thick diamond film is improved.

A turbofan engine includes a fan, a core turbine engine having an exhaust section, and a hydrogen-exhaust gas heat exchanger in flow communication with the exhaust section and hydrogen flowing along a hydrogen supply line. The hydrogen-exhaust gas heat exchanger defines a load capacity factor determined by raising a product to a one-quarter power, the product being determined by multiplying a heat transfer surface area density associated with the hydrogen-exhaust gas heat exchanger by a process conductance parameter that relates characteristics of hydrogen, ambient air, and exhaust gas at takeoff, as well as a fan diameter of the fan and an overall pressure ratio of the turbofan engine. The load capacity factor is between 2.92 and 24 for the fan diameter being between 0.5 and 5 meters and the heat transfer surface area density being between 500 m2 / m3 and 13,000 m2 / m3.

The invention relates to the technical field of pressure reducing valves, and discloses a high-pressure hydrogen pressure reducing valve and a using method thereof.The high-pressure hydrogen pressure reducing valve comprises a valve pipe assembly, the valve pipe assembly comprises a hydrogen filtering assembly, the two ends of the hydrogen filtering assembly fixedly communicate with valve shells, and the top of the hydrogen filtering assembly fixedly communicates with a gas valve assembly; one end of the hydrogen filtering assembly is fixedly sleeved with an electric heating ring sleeve, the other end of the hydrogen filtering assembly is rotationally connected with a fan wheel, the side face of the fan wheel is rotationally sleeved with a magnetic cutting element, the bottom of the fan wheel is fixedly connected with a rotating wheel, and one end of the inner side of the bottom of the valve shell fixedly communicates with a magnetic cylinder. The problem that groove-shaped erosion marks appear on the sealing face of the valve seat due to the fact that metal impurity particles in a pipeline of the pressure reducing valve impact the valve element and the valve seat along with high-speed hydrogen flow is solved, the metal impurity particles attached to the magnetic cylinder can be recycled, and the problems that resources are wasted and the surface of an outlet of a valve body is frosted when high-pressure hydrogen expands through throttling are solved.

The invention relates to the technical field of hydrogen engines, and particularly discloses a hydrogen engine crankcase pipeline hydrogen concentration control method, device and system.The method comprises the steps that the hydrogen concentration in a crankcase ventilation pipeline in the current period, the mixed gas flow in the crankcase ventilation pipeline and the air flow at the front end of an air inlet header pipe are obtained; then the hydrogen concentration of the rear end of the gas inlet main pipe in the current period is calculated; the hydrogen concentration of the rear end of the intake manifold in the current period is compared with a hydrogen concentration threshold value, and the actual air-fuel ratio of the hydrogen engine in the current period is calculated according to a comparison result; and when the actual air-fuel ratio of the hydrogen engine in the current period is inconsistent with the required air-fuel ratio, the flow of hydrogen sprayed by the hydrogen nozzle in the next period is adjusted, so that the actual air-fuel ratio of the hydrogen engine in the next period reaches the required air-fuel ratio. The risk that high-concentration hydrogen mixed gas explodes in the turbocharger can be eliminated, meanwhile, the air-fuel ratio of the hydrogen engine is accurately controlled, and the risks of preignition and detonation are reduced.