413 results about "Hydrogen flow" patented technology

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 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 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.

The invention discloses a hydrogen charging system and method for a magnesium-based solid hydrogen storage reaction kettle. A hydrogen storage tank is placed in each placement position in an inner cavity of the reaction kettle, and a heat exchange coil pipe is arranged outside each placement position; the hydrogen charging system comprises a hydrogen charging part, a temperature control part and a safety protection part; the hydrogen filling part comprises a hydrogen filling main pipeline; a hydrogen flow controller and a hydrogen heat exchanger are arranged on the hydrogen filling main pipeline; the temperature control part comprises an external heat-conducting oil circulating system, the external heat-conducting oil circulating system comprises a heat-conducting oil tank, a flow bypass pipeline is arranged between the oil inlet pipeline and the oil return pipeline, and a heat-conducting oil shunting automatic switch valve is arranged on the flow bypass pipeline; the safety protection part comprises a safety valve arranged on the reaction kettle, the safety valve is externally connected with an emptying pipeline, a pressure relief bypass pipeline is arranged between the emptying pipeline and the hydrogen filling main pipeline, and an automatic opening and closing pressure relief valve is arranged on the pressure relief bypass pipeline. The system has the advantages that the hydrogen storage tanks in the reaction kettle can be quickly and efficiently filled with hydrogen, and the safety of the system is ensured.

The invention relates to the technical field of fuel cells, in particular to a hydrogen feeding amount control method of a hydrogen cell water-gas separation device for an unmanned aerial vehicle, a cyclone separation cavity, a heat exchange condensation cavity and a hydrogen mixing cavity which are sequentially distributed from bottom to top are arranged in a separation shell, and a structure combining multi-stage separation and heat exchange is adopted; the technical problem that a traditional gas-liquid separator cannot thoroughly remove micron-sized liquid drops and gaseous water vapor is solved, liquid water drops are efficiently removed through the cyclone separation cavity, new hydrogen and wet hydrogen are subjected to heat exchange through the heat exchange condensation cavity, residual water vapor is sufficiently condensed and separated out, and finally mixed hydrogen with the dryness meeting the requirement is output. When water in the water-gas separation device for the hydrogen battery is excessive, the opening degree of the first valve of the wet hydrogen inlet is reduced, and the opening degree of the second valve of the new hydrogen inlet is increased at the same time, so that the amount of water entering wet hydrogen in the gas-liquid separator is reduced, and formation of condensed accumulated water in the gas-liquid separator is inhibited.

The invention relates to the technical field of image recognition, in particular to a hydrogen filling recognition method and system of a hydrogen filling station based on an image recognition technology, and the method comprises the steps: multi-source image synchronous collection: synchronously collecting a visible light image and an infrared thermogram of a hydrogen filling gun connection region; segmentation of a fogging interference area: segmenting the fogging interference area in the visible light image based on the temperature distribution of the infrared thermogram to generate an effective imaging area; hydrogen flow feature extraction and matching region generation: hydrogen flow features are extracted, the hydrogen flow features comprise reflection intensity gradient distribution in the visible light image and a low-temperature diffusion region of the infrared thermogram, and a candidate matching region set is constructed; and spatial coincidence degree judgment and leakage trend identification: monitoring the change of the spatial coincidence degree of the reflection intensity gradient and the low-temperature diffusion region, and generating a hydrogen leakage alarm when the coincidence degree exceeds a preset coincidence degree threshold value and is in a continuous expansion trend. The method introduces a spatial coincidence degree evolution discrimination mechanism, and has the characteristics of high resolution, high sensitivity and quick response.

The invention provides a movable zero-carbon emergency energy device and management method for hydrogen-oriented wind-light-storage cooperation, and the device comprises a reaction system which is used for preparing a hydrogen flow in real time; the auxiliary gas system is used for outputting auxiliary gas flow; the fuel cell system is used for generating electricity through the reaction of the hydrogen flow and the auxiliary gas flow; the power storage system is used for storing electric energy generated by power generation of the fuel cell system; the discharging system is used for outputting the electric energy stored in the electricity storage system at a corresponding output voltage according to a preset requirement; the control system is used for coordinating and controlling the reaction system, the auxiliary gas system, the fuel cell system, the power storage system and the discharge system; and the explosion-proof box is used for loading the system. According to the movable zero-carbon emergency energy device for hydrogen-oriented wind-light-storage cooperation, power can be supplied to the outside by preparing hydrogen in real time and adopting a fuel cell power generation mode, the position of the device can be flexibly adjusted according to the power supply requirement, and the high-reliability, green and low-carbon emergency energy supply requirement is met.

A method for predicting a multi-physics field coupling process of natural hydrogen flow-heat transfer-rock thermal strain in underground pores belongs to the field of natural hydrogen resource exploration, and is characterized in that a multi-physics field coupling model for describing natural hydrogen flow-heat transfer-rock thermal strain in formation pores is established based on phase field variables; the method comprises the following steps: establishing a porous medium geometric model according to a rock underground pore structure, performing grid division on the porous medium geometric model to obtain a plurality of grid units for reflecting different spatial distribution positions of natural hydrogen in the rock underground pore structure, and setting initial conditions and boundary conditions of the porous medium geometric model; according to the multi-physics field coupling model, solving the space-time evolution characteristics of the hydrogen volume fraction, the water volume fraction, the fluid temperature, the rock skeleton matrix temperature and the rock skeleton matrix thermal strain value of each grid unit of the porous medium geometric model to obtain the distribution in time and space; according to the method, the reservoir forming mechanism and the reservoir forming stability of the natural hydrogen are evaluated more accurately and systematically.

The invention discloses a two-stage rotational flow hydrogen fuel nozzle and a combustion chamber thereof. The nozzle comprises a main hydrogen flow path, an auxiliary hydrogen flow path and an air flow path; the hydrogen main flow path is provided with a plurality of main spray holes which are distributed in a circumferential array; the air flow path is provided with a two-stage cyclone; the hydrogen auxiliary flow path comprises a hollow annular flow divider, the flow divider is coaxially arranged around the periphery of the hydrogen main flow path, and a plurality of injection holes are formed in the inner wall and the outer wall of the flow divider and communicated with the first-stage rotational flow channel and the second-stage rotational flow channel respectively. In the using process, efficient mixing of fuel and air is achieved through the synergistic effect of graded injection of main and auxiliary hydrogen and two-stage rotational flow air. According to the combustion chamber provided with the nozzle, large-scale flames are decomposed into a plurality of small flames through micro-scale injection, two-stage rotational flow is combined for strengthening mixing, the backfire risk is effectively restrained, the combustion temperature is lowered, NOx emission is remarkably reduced, meanwhile, the combustion stability is improved, and a reliable solution is provided for hydrogen fuel combustion of an aero-engine.

The invention provides a control method and device of an alkaline electrolyzed water system, an MPC controller optimizes hydrogen flow and auxiliary power supply power in real time through a prediction model in each control period to obtain an optimal control sequence of the current control period, and based on a first control parameter in the optimal control sequence, a second control parameter in the current control period is obtained; and cooperatively regulating the hydrogen-oxygen side pressure difference of the alkaline electrolyzed water system to a target value, and meanwhile, controlling the hydrogen concentration in oxygen of the alkaline electrolyzed water system within a safety threshold value. According to the scheme, the input is controlled based on rolling optimization of the multivariable dynamic prediction model, the dual targets of pressure difference stabilization and inhibition of the hydrogen content in oxygen are achieved, the technical problem that dynamic balance and the HTO risk are difficult to consider in traditional single parameter adjustment is solved, and the hydrogen production efficiency and safety are remarkably improved in the scene of wind and light fluctuation.

A H2 defueling system for automating defueling of a hydrogen tank is disclosed. The H2 defueling system comprises: a hydrogen storage tank containing hydrogen; a plurality of electronic valves configured for regulating hydrogen discharge of hydrogen from the hydrogen tank; at least one pressure sensor and at least one temperature sensor; a hydraulic circuit interconnecting the hydrogen tank, the plurality of electronic valves, the at least one pressure sensor and the at least one temperature sensor; and a control unit configured to: receive input from the at least one pressure sensor and the at least one temperature sensor; automatically adjust the flow rate of gaseous hydrogen from the storage tanks based on the input from the sensors to maintain the gaseous hydrogen within pressure limits; modulate operations of the plurality of electronic valves to control hydrogen discharge to control the flow of hydrogen from the hydrogen tank.

The application relates to the technical field of hydrogen energy transportation and material performance testing, and relates to a test structure for hydrogen permeation testing under a high-pressure gaseous hydrogen environment, a mounting method and application thereof. The test structure comprises a sample body and an insulating sealing assembly, and the sample body is in a double-stage disc structure. The uppermost edge of the first sealing insulating assembly is flush with the upper end surface of the cylindrical platform, and the sample body is matched with the inner side of the first sealing insulating assembly for installation. The second sealing insulating assembly is in an open-upward shape, and the first sealing insulating assembly is matched with the second sealing insulating assembly for installation. The test surface of the sample body of the test structure is kept consistent with the flow field of the gas main stream, and when the test structure is used for testing, the permeation behavior of the hydrogen flow to the material surface can be truly reflected. All clamping and conducting structures are arranged on the outer part of the pipe wall of the test pipeline or the left part of the sample body, so that flow field disturbance is avoided in the main path of the gas flow.

The utility model relates to the technical field of electrolyzed water, in particular to a bipolar plate and an electrolytic bath. The utility model relates to a bipolar plate, which comprises a substrate, at least two side-by-side water oxygen flow fields arranged on the anode surface of the substrate, at least one hydrogen flow field arranged on the cathode surface of the substrate, and a water inlet, a water oxygen outlet and a hydrogen outlet which penetrate through the substrate, and the water inlet is communicated with the water inlet end part of each water oxygen flow field; the water oxygen outlet is communicated with the water oxygen outlet end part of each water oxygen flow field; and the hydrogen outlet is communicated with the hydrogen outlet end part of the hydrogen flow field. The utility model provides a bipolar plate and an electrolytic bath, which are used for solving the problem of non-uniform water flow distribution on the anode side of the bipolar plate.

The invention relates to the technical field of fuel cells, in particular to an air-cooled hydrogen fuel cell energy recycling device and a control method thereof.The air-cooled hydrogen fuel cell energy recycling device comprises a hydrogen fuel cell stack, a hydrogen storage bottle and a fan, the fan is communicated with an air flow channel of the hydrogen fuel cell stack, and the hydrogen storage bottle is communicated with a hydrogen flow channel of the hydrogen fuel cell stack through a hydrogen supply pipeline; a heat recovery channel surrounding the hydrogen storage bottle is arranged on the outer side of the hydrogen storage bottle, one end of the heat recovery channel is communicated with the fan through an air inlet channel, the other end of the heat recovery channel is connected with a humidifier through an air outlet channel, the humidifier is arranged on the side, away from the fan, of the hydrogen fuel cell stack, and waste heat generated during operation of the hydrogen fuel cell stack is recovered. Heat is provided for the hydrogen storage bottle through the heat recovery channel, the energy utilization rate is improved, the hydrogen desorption speed of the hydrogen storage bottle is maintained, the stack efficiency is improved, condensate water in the hydrogen desorption and heat absorption process of the hydrogen storage bottle is used for humidifying an air inlet of a hydrogen fuel cell stack, water balance of the air-cooled hydrogen fuel cell is effectively guaranteed, and the phenomenon of membrane drying is prevented.

The invention provides a fuel cell anode pressure fluctuation suppression method and system, and relates to the technical field of battery intelligent control, and the method comprises the steps: carrying out the real-time sensing of the stack operation condition of a target fuel cell, and obtaining the stack operation state parameters; performing critical working condition identification, pressure trend prediction and adaptive model prediction control based on the operation state parameters of the electric pile, and deciding an optimal control instruction for balancing pressure stability, action smoothness and system energy efficiency; the optimal control instruction is converted into the opening degree of a proportional valve at the front end of an ejector and the rotating speed of an anode circulating pump, and the flow of hydrogen entering an anode and the amount of recycled gas are finally adjusted by changing the opening degree and the rotating speed, so that the anode pressure fluctuation of the target fuel cell is inhibited; through multi-level information fusion and decision optimization, accurate and smooth control of the anode pressure is realized, and the dynamic performance and reliability of the fuel cell system are significantly improved.

The invention discloses a hydrogen storage reactor based on synergistic heat management of a phase change material and a spiral heat exchange tube. The hydrogen storage reactor comprises an outer cylinder, a middle cylinder, an inner cylinder, a sealing cover and the spiral heat exchange tube. The outer cylinder, the middle cylinder and the inner cylinder divide the hydrogen storage reactor into three layers from inside to outside, and the inner layer and the outer layer are filled with phase change materials; the spiral heat exchange tube is arranged on the middle layer, and metal hydride is filled around the spiral heat exchange tube; in the hydrogen storage process, hydrogen flows into the middle layer of the reactor from an inlet in the center of the top end of the reactor and reacts with metal hydride; heat exchange fluid flows into the spiral heat exchange tube from a top inlet of the reactor, absorbs heat generated by reaction and flows out from a bottom outlet of the reactor; the phase change materials filled in the inner layer and the outer layer absorb heat generated by reaction and store the heat. The spiral heat exchange pipe is adopted for accelerating heat exchange, and the hydrogen storage and release rate is increased; the phase change material can store part of heat generated by the hydrogen storage reaction and release the heat during hydrogen release, the interlayer type arrangement can increase the heat exchange area, and the heat storage and release efficiency is improved.

A highly efficient large-flow mixing device for natural gas and hydrogen for gas-fired power plants, characterized in that it comprises: a natural gas line on which a first flow meter and a first Venturi tube are arranged; a hydrogen line on which a second flow meter, a flow control valve and a second Venturi tube are arranged; a mixed gas line on which, in the direction of gas flow, a static mixer, a swirl mixer and a concentration meter are arranged sequentially; a PLC control unit which is electrically connected to the first flow meter, the second flow meter, the flow control valve and the concentration meter respectively; wherein the natural gas line and the hydrogen line are each connected to the inlet of the static mixer;wherein the PLC control unit is designed to calculate the target hydrogen flow rate and control the opening degree of the flow control valve based on the current natural gas flow rate detected by the first flow meter and a preset mixture concentration; wherein the PLC control unit is further designed to correct the opening degree of the flow control valve in real time based on the concentration signal of the mixed gas measured by the concentration meter.

A process for producing amines by reductive amination, the process includes introducing a feed stream, the feed stream comprising an amino alcohol and a reducing agent, and hydrogen in a reaction zone of a reactor, and contacting the feed stream with a catalyst in the reaction zone. A hydrogen flow rate into the reaction zone is adjusted, and a product stream comprising ethyleneamines is extracted. The catalyst includes a carrier component selected from alumina, silica, and combinations thereof; and an active component having a first metal, a second metal, and a third metal. The first metal is selected from cobalt, nickel, and copper, the second metal is selected from rhenium, ruthenium, chromium, zinc, sodium, calcium, magnesium, strontium, lithium, potassium, barium, cesium, lanthanum, tungsten, iron, silver, titanium, manganese, aluminum, rhodium, platinum, palladium, iridium, and combinations thereof, and the third metal is niobium.

The application relates to a hydrogenation flow adjusting and detecting device of a hydrogenation machine, which is applied to the technical field of hydrogenation equipment and comprises a detecting pipeline connected to a gas outlet of the hydrogenation machine, wherein a detecting assembly is arranged in the detecting pipeline, the detecting assembly comprises a plurality of connecting pieces fixed to the inner wall of the detecting pipeline, the connecting pieces are uniformly distributed along the circumference of the detecting pipeline, a strain piece is arranged on the connecting piece, a wind ball is arranged on the end of the connecting piece away from the inner wall of the detecting pipeline, an adjusting valve is arranged between the detecting pipeline and the hydrogenation machine, the adjusting valve is signal-connected with the strain piece, and hydrogen gas in the detecting pipeline flows from the end close to the adjusting valve to the end away from the adjusting valve. The application has the effect that when the hydrogenation machine works, hydrogen gas rushes into the detecting pipeline, the wind ball is impacted by airflow and moves, the connecting piece and the strain piece are deformed, the current air pressure is measured, and then the hydrogen gas flow rate is measured. The area of the windward surface is constant during measurement, the backflow phenomenon is not prone to occurring, and the accuracy of the detection of the detecting device is improved.

The invention belongs to the technical field of fuel gas generators, and discloses a combustion chamber of a fuel gas generator. The gas generator combustion chamber comprises a combustion chamber front section and a combustion chamber rear section which are sequentially connected from front to back through a flange plate. A hydrogen spray hole and a spark plug are arranged at the front section of the combustion chamber, the spark plug ignites hydrogen, an oxidizing agent and fuel in main flow are ignited through hydrogen flames, and the hydrogen flow is controlled to be suitable for different ignition working conditions; two paths of body air are arranged at the rear section of the combustion chamber, and flame stability in the combustion chamber is achieved through flow matching of the two paths of body air; meanwhile, the ignition function of the igniter and the flame stabilizing function of the flame stabilizer are integrated on the combustion chamber of the fuel gas generator, the complexity of the fuel gas generator is reduced, the space size is reduced, and the fuel gas generator can be suitable for application scenes with the limited installation space size. The flow calculation method is simple and reliable and has engineering practical value.

The invention discloses a hydrogen storage tank pressure control system of a hydrogen production, hydrogen storage and power generation closed-loop system, and relates to the technical field of hydrogen production, hydrogen storage and power generation, and the hydrogen storage tank pressure control system comprises a pressure data acquisition module which is used for acquiring internal pressure data of a hydrogen storage tank so as to monitor the internal pressure data change of the hydrogen storage tank in real time; the hydrogen output line is used for outputting hydrogen in the hydrogen storage tank, the hydrogen input line is used for inputting hydrogen into the hydrogen storage tank, the control execution module is used for controlling in and out of the hydrogen in the hydrogen storage tank, and the compression module is used for compressing the hydrogen in the hydrogen input line and increasing the pressure. The hydrogen flow rate monitoring module is used for monitoring the flow rate of hydrogen in the hydrogen output line and monitoring the flow rate of hydrogen in the hydrogen input line. The execution module and the compression module are controlled based on the stepped control model, so that the hydrogen flow rate in the hydrogen output line and the hydrogen flow rate in the hydrogen input line are changed until the pressure in the hydrogen storage tank is balanced.

The invention belongs to the technical field of hydrogen storage, and particularly relates to a solid hydrogen storage tank and an explosion suppression control method thereof. The solid hydrogen storage tank comprises a tank body, at least one monitoring module, at least one explosion suppression device and a control module, the tank body comprises a tank shell and an airflow speed limiter, an inner cavity is formed in the tank shell, and the airflow speed limiter is arranged in the tank shell. The monitoring module is arranged on the peripheral wall of the tank shell and used for collecting pressure and temperature in the inner cavity. And the at least one explosion suppression device is arranged on the peripheral wall of the tank shell and can spray an explosion suppression material towards the inner cavity. The control module is connected with the monitoring module and the explosion suppression device and controls the explosion suppression device according to monitoring information sent by the monitoring module. Wherein the airflow speed limiter is connected with a hydrogen output pipeline and is used for adjusting the flow of hydrogen entering the hydrogen output pipeline according to the pressure in the inner cavity. According to the solid-state hydrogen storage tank provided by the invention, the safety level of the solid-state hydrogen storage tank is greatly improved in a mode of combining active safety defense and passive safety adjustment.

The present disclosure relates to a flow channel plate, a preparation method thereof and a primary and secondary hydrogen converter, wherein Fe2O3 and / or Fe3O4 are deposited in the first micro-channel of the heat exchange plate by magnetron sputtering, the prepared flow channel plate has a catalyst layer with uniform thickness, and the catalyst layer has strong bonding force with the micro-channel plate material, which can avoid the problems of large heat fluid channel resistance and large hydrogen flow pressure drop caused by uneven catalyst filling thickness, and is conducive to improving the heat exchange efficiency of cold and hot fluids and the primary and secondary hydrogen conversion efficiency, while reducing space occupation.

The invention discloses a hydrogenated lecithin synthesis method based on a nickel catalysis continuous flow strategy, relates to the technical field of preparation of hydrogenated lecithin, and aims to solve the problem that the cost of preparing the hydrogenated lecithin is greatly increased due to the fact that the hydrogen pressure is relatively high and recycling of a catalyst is not considered in an existing method. The preparation method is technically characterized by comprising the following steps: (1) performing heat treatment on moso bamboo powder in a protective gas atmosphere to obtain a carbon carrier; dipping the carbon carrier in an alkali solution, and then carrying out a high-temperature activation reaction in a protective gas atmosphere; an activated carbon carrier is obtained; the preparation method comprises the following steps: loading a nickel source, an auxiliary agent and a structure stabilizer into an activated carbon carrier by dipping to obtain a catalyst precursor, and pyrolyzing the catalyst precursor in a protective gas atmosphere to obtain a Ni / C catalyst, and (2) preparation of hydrogenated lecithin: dissolving lecithin in a mixed solution of dichloromethane and methanol, taking a Ni / C catalyst, filling a catalytic pipeline with the Ni / C catalyst, and carrying out a hydrogenation reaction under hydrogen flow to obtain the hydrogenated lecithin.

This invention discloses a combined fuel cell and heat pump power generation and heat production system. The system includes: a fuel cell with a hydrogen flow channel, an air flow channel, and a coolant flow channel; a first inlet pipe with its outlet end connected to the inlet end of the hydrogen flow channel; a condenser having a third flow channel and a fourth flow channel; a hydrogen catalytic burner with its inlet end connected to the inlet end of the first inlet pipe via a first branch pipe; a first heat exchanger including a first channel and a second channel, one end of the first channel being connected to the outlet end of the hydrogen catalytic burner, the second channel being connected in series with a water inlet pipe, and the other end of the water inlet pipe being connected to the liquid inlet end of the fourth flow channel; and a second heat exchanger including a third channel and a fourth channel, one end of the third channel being connected to the outlet end of the hydrogen catalytic burner, and the inlet end of the fourth channel being connected to the outlet end of the fourth flow channel. The combined fuel cell and heat pump power generation and heat production system of this invention broadens the range of heat production ratios for combined fuel cell and heat pump systems.

Water electrolysis system comprising: a membrane electrode assembly; a first separator in contact with a hydrogen electrode of the membrane electrode assembly; a hydrogen flow passage provided between the first separator and the hydrogen electrode; a second separator in contact with an oxygen electrode of the membrane electrode assembly; an oxygen flow passage provided between the second separator and the oxygen electrode; and a cooling device that cools the hydrogen electrode so that the temperature of the hydrogen electrode becomes lower than the temperature of the oxygen electrode.

The application discloses a kind of ammonia hydrogen mixed natural gas combustion boiler test platform and its working method, test platform includes natural gas storage tank, hydrogen storage tank, liquid ammonia storage tank and liquid ammonia heating system, natural gas storage tank is connected with the multiple-component gas burner installed on gas boiler, hydrogen storage tank is connected with the multiple-component gas burner installed on gas boiler and is equipped with hydrogen flow regulating valve on connecting pipeline, liquid ammonia storage tank is connected with ammonia water pump, and ammonia water pump outlet is connected with liquid ammonia heating system, liquid ammonia heating system can heat liquid ammonia into ammonia gas of preset temperature, and the outlet of liquid ammonia heating system is connected with multiple-component gas burner and is equipped with ammonia gas main flow regulating valve on connecting pipeline.The application can realize zero carbon emission, and the system structure is reasonable, with the characteristics that heat can be matched and utilized in stages, providing a kind of thought for the development of industrial boiler in future.

The application discloses a growth method for improving pit defects of a silicon carbide epitaxial wafer, and comprises the following steps: cleaning a silicon carbide substrate and placing the substrate in an epitaxial reaction chamber, introducing hydrogen, and performing high-temperature annealing treatment; increasing the hydrogen flow and the reaction chamber temperature, and performing hydrogen etching; reducing or maintaining the reaction chamber temperature, introducing a carbon source and a silicon source, and growing a buffer layer on the substrate surface; maintaining the gas introduction, increasing the reaction chamber temperature, and growing a gradient layer on the buffer layer; reducing the reaction chamber temperature, simultaneously opening a center gas source and an edge gas source, and growing a base epitaxial layer on the gradient layer; maintaining the reaction chamber temperature, adjusting the edge gas source flow to form a gradient flow, and growing a flat epitaxial layer on the base epitaxial layer. Through the substrate pretreatment-low rate epitaxy-high rate flat epitaxy, combined with the gradient process filling process, the application realizes the step-by-step filling and surface flattening of the pit defects, and effectively reduces the number of Pit defects and the epitaxial thickness uniformity.

This invention discloses a modeling method, electronic device, and storage medium for hydrogen energy systems. The method includes: establishing a hydrogen production mass flow model for an electrolyzer, and using a multi-condition linearization method to handle the nonlinear operating efficiency of the electrolyzer; establishing a storage mass flow model for a hydrogen storage tank, dynamically characterizing its effective capacity based on the tank's physical volume, operating pressure, and ambient temperature parameters; constructing a hydrogen mass flow bus, linking the electrolyzer's hydrogen production variable and the storage tank's hydrogen filling variable to this bus, and establishing hydrogen mass flow balance constraints among the models to characterize that at any given time, the total amount of hydrogen flowing into the bus equals the total amount flowing out. This invention solves the problem of insufficient accuracy in traditional models, achieving a balance between high accuracy of the equipment model and high solution efficiency for the optimization problem, providing a reliable modeling foundation for the optimal scheduling of hydrogen-containing integrated energy systems.

The utility model provides a simple hydrogen circulation device for fuel cell testing, and relates to the technical field of fuel cells, and the simple hydrogen circulation device comprises a hydrogen flow meter used for measuring hydrogen flow; the hydrogen circulating pump is used for pushing hydrogen to flow; the electromagnetic valve is used for controlling the working state of the hydrogen circulating pump; the gas-liquid separator is used for separating liquid components in the hydrogen; the drain valve is used for regularly draining the separated excessive water; the temperature and pressure sensor is used for monitoring pressure and temperature changes; the hydrogen flow meter is mounted on the outlet side of the hydrogen circulating pump; the electromagnetic valves are arranged at a gas inlet and a gas outlet of the hydrogen circulating pump; the gas-liquid separator is arranged on the inlet side of the hydrogen circulating pump, and the drain valve is connected with the gas-liquid separator; the temperature and pressure sensors are installed on the outlet side and the inlet side of the hydrogen circulating pump.