Miniature hydrogen production system applied to sea island

Abstract

The invention discloses a miniature hydrogen production system for island application, which utilizes wind energy to simulate hydrogen production by adopting a water electrolysis hydrogen production technology, and comprises a wind power generation module, a main control system module, an LCD (Liquid Crystal Display) module and a signal processing module, the wind power generation module comprises a wind power generator and a rechargeable battery, the wind power generator rotates to supply power to the electrolytic cell and stores surplus power into the rechargeable battery, tap water is added into the electrolytic cell to serve as an electrolyte, and an electrolyte is added into the electrolytic cell to improve the conductivity of the electrolyte; the main control system module serves as a core controller of the system and is used for processing various instructions; the LCD display module is used for displaying the hydrogen concentration, the electrolyte temperature and the electric quantity generated by wind power generation; the signal processing module comprises a hydrogen sensor and a temperature sensor which are used for measuring the concentration of hydrogen and the temperature of the electrolyte respectively. The device faces an island, adopts wind power generation to electrolyze water to produce hydrogen, and reduces the consumption of fossil energy.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen production, and in particular to a micro hydrogen production system for island applications. Background Art

[0002] As a renewable energy source, hydrogen has several meanings. In terms of environmental protection, hydrogen combustion does not emit greenhouse gases and harmful substances such as carbon dioxide, but only produces water, which is very friendly to the environment. In terms of efficiency, hydrogen fuel cell vehicles can convert hydrogen into electricity, and the energy conversion efficiency is high. Compared with traditional fuel vehicles, they can more effectively meet the automotive market's demand for efficient energy conversion. In terms of energy storage, hydrogen can be used to store unstable renewable energy sources such as solar and wind energy, providing balancing capabilities for the output of the power grid. In terms of versatility, in addition to being used as a fuel, hydrogen can also be used in the industrial field, aerospace and semiconductor manufacturing, and other fields, and has broad application prospects. Therefore, in the future energy transformation, hydrogen is expected to become one of the important energy sources and play an increasingly important role.

[0003] In addition, hydrogen, as a new type of clean energy, can reduce the consumption of fossil energy, reduce dependence on it, alleviate the shortage of fossil energy resources, and reduce the adverse impact on the environment. "Green hydrogen" produced by renewable energy can also be directly applied to various decarbonization fields, such as industry, transportation, construction, etc., which is an effective way to achieve deep reduction of carbon emissions. At present, fossil energy is the main source of hydrogen, and the hydrogen produced by electrolysis process accounts for less than 4% of the world. In the past two centuries, the continuous growth of population has led to an increasing demand for energy. Due to the continuous growth of fossil energy consumption, a large amount of greenhouse gas emissions have been caused. In order to achieve the goal of zero emissions, the production of "green hydrogen" from renewable energy needs to be significantly increased. Therefore, hydrogen produced by renewable energy is considered to be an important energy carrier for achieving sustainable green development in the future, which can achieve energy conservation and emission reduction and environmental protection, and promote the sustainable development of the economy and society.

[0004] Hydrogen can be used as both a valuable commodity gas and a chemical raw material, so it can be used as an energy storage carrier for renewable energy conversion. Combining water electrolysis technology and renewable energy power generation, excess electricity can be stored in hydrogen in the form of chemical energy, so that the volatility of renewable energy can be better responded to, and the level of consumption and clean energy substitution can be improved. "Green hydrogen" produced by renewable energy can also be directly applied to various decarbonization fields, such as industry, transportation, and construction, which is an effective way to achieve a deep reduction in carbon emissions. At present, most hydrogen is produced by fossil energy, and very little is produced by water electrolysis hydrogen production technology. With the continuous growth of population and the continuous increase in energy demand, the use of fossil energy has also emitted more and more greenhouse gases. In order to effectively alleviate the problem of greenhouse gas emissions, it is necessary to significantly increase the output of "green hydrogen" produced by renewable energy.

[0005] The disclosure of the above background technology content is only used to assist in understanding the concept and technical solution of the present invention. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above content has been disclosed on the filing date of this patent application, the above background technology should not be used to evaluate the novelty and creativity of the present application. Summary of the invention

[0006] The purpose of the present invention is to propose a micro hydrogen production system for island applications to solve the technical problem of using fossil energy to produce hydrogen and emitting more and more greenhouse gases in the above-mentioned prior art.

[0007] To this end, the present invention proposes a micro hydrogen production system for island applications.

[0008] Preferably, the present invention may also have the following technical features:

[0009] A micro hydrogen production system for island applications utilizes wind energy to simulate hydrogen production using water electrolysis hydrogen production technology. The system comprises a wind power generation module, a main control system module, an LCD display module and a signal processing module; the wind power generation module comprises a wind turbine generator and a rechargeable battery, the wind turbine generator rotates to supply power to an electrolyzer and stores surplus power in the rechargeable battery, tap water is added to the electrolyzer as an electrolyte, and electrolytes are added to the electrolyzer to improve the conductivity of the electrolyte; the main control system module serves as the core controller of the system and is used to process various instructions; the LCD display module is used to display the hydrogen concentration, the electrolyte temperature and the amount of electricity generated by wind power generation; the signal processing module comprises a hydrogen sensor and a temperature sensor to measure the hydrogen concentration and the electrolyte temperature respectively.

[0010] Preferably, the wind power generation module further includes fan blades connected to the wind generator.

[0011] Preferably, the electrolyte is a KOH or NaOH aqueous solution.

[0012] Preferably, the temperature of the electrolyte is 45°C.

[0013] Preferably, a plurality of the batteries are connected in series to ensure a relatively stable power supply.

[0014] Preferably, the hydrogen is collected by exhausting air downward, the collecting device is turned upside down, and the hydrogen sensor is placed at the bottle mouth.

[0015] Preferably, a desiccant is further included, and the desiccant is arranged on the gas outlet conduit of the collecting device and is used to filter the impurity water vapor in the hydrogen.

[0016] Preferably, the desiccant is soda lime.

[0017] Preferably, the main control system module uses STC89C51 single-chip microcomputer chip as the control body.

[0018] Preferably, the voltage change of the hydrogen sensor is proportional to the hydrogen concentration, and the hydrogen concentration data can be simulated according to the linear relationship between the voltage and the concentration, and the simulated concentration data can be displayed on the LCD display in the form of digital quantity through relationship conversion.

[0019] The beneficial effects of the present invention compared with the prior art include:

[0020] In terms of environmental protection, hydrogen energy, as an important secondary energy source, has high energy density and is green and pollution-free. If hydrogen is produced by electrolyzing water with renewable energy, it will not only provide a new way to absorb renewable energy, but also greatly reduce the cost of hydrogen production, which is consistent with my country's clean energy transformation goals. Developing renewable energy to produce hydrogen will reduce carbon emissions, which will inevitably contribute to carbonization and carbon neutrality. Wind power generation is an important link to achieve this goal. Wind power generation technology is widely regarded as one of the renewable energy sources closest to commercialization and most competitive in the market, except for water. And it occupies a small area, has little social controversy, is rich in resources, is environmentally friendly, and can develop faster on a large scale, so the country has given strong support. In addition, the use of renewable energy to produce hydrogen will not produce harmful gases and particulate matter, and will not pollute the air and land, and can achieve zero emissions and zero pollution, so it can help reduce dependence on fossil fuels and damage to the environment, thereby helping to alleviate climate change.

[0021] In terms of economy, the use of renewable electricity to electrolyze water to produce hydrogen avoids excessive reliance on traditional non-renewable energy such as oil and natural gas, and helps ease the pressure of energy supply and demand. Although the cost of hydrogen production by electrolysis of water is relatively high at present, with the continuous improvement of technology, the cost of hydrogen production by electrolysis of water is gradually decreasing. Compared with traditional hydrogen production methods, the equipment and energy costs required for hydrogen production by electrolysis of water are also gradually decreasing. Therefore, hydrogen production by electrolysis of water is expected to become a more economical and feasible method of hydrogen production in the future. Not only that, hydrogen production by electrolysis of water can also realize the transformation from clean energy to hydrogen energy, and promote cross-industry cooperation and development through the application of hydrogen. For example, the application of hydrogen energy technologies such as hydrogen fuel cells will help promote the intelligent development of automobiles, transportation, construction and other fields, thereby promoting economic development.

[0022] In terms of society, the application of wind power generation hydrogen production technology helps to create a good employment environment, because the construction and development of the wind power generation and hydrogen production industry chain requires various skills and positions, thus creating employment opportunities for the society. In addition, the application of wind power generation hydrogen production technology can also create new business opportunities and fields, promote the continuous improvement and innovation of technology, promote social progress and development, and help build a more environmentally friendly and happy society. Considering the social impact, this paper filters the hydrogen produced by the water electrolysis hydrogen production system to reduce the impact of impurity gases and provide quality assurance for the mixed use of hydrogen raw materials and other gases, which is of great significance to people's livelihood and society.

[0023] In terms of law, wind power generation hydrogen production technology is conducive to the achievement of energy transformation and carbon emission reduction targets, which is closely related to the policies and regulations of many countries and regions. Therefore, the application of wind power generation hydrogen production technology can be supported by the government at the legal level, and will also promote the introduction and implementation of carbon emission reduction regulations.

[0024] In terms of safety and health, the use of wind power to generate hydrogen through electrolysis of water uses renewable energy, which can greatly reduce the use of fossil energy, thereby reducing the emission of gases that pollute the air, such as carbon dioxide and sulfur dioxide, effectively controlling greenhouse gas emissions and ensuring the respiratory health of humans and animals. In addition, it can also slow down the rise in global temperatures, thereby slowing down the melting of glaciers, rising sea levels and other problems, ensuring the stability of the habitats of various organisms and protecting biological diversity. Using renewable energy to produce clean energy, namely hydrogen energy, will not produce harmful gases, thereby reducing the occurrence of human cardiopulmonary diseases and reducing the pollution of crops by the environment, which greatly guarantees people's health and food safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of alkaline water electrolysis according to a specific embodiment of the present invention.

[0026] Figure 2 It is a schematic diagram of the acidic water electrolysis according to a specific embodiment of the present invention.

[0027] Figure 3 It is an overall design flow chart of a hydrogen production device according to a specific implementation mode of the present invention.

[0028] Figure 4 It is a peripheral connection diagram of the electrolytic cell and charging module according to a specific embodiment of the present invention.

[0029] Figure 5 It is a schematic diagram of a gas washing bottle for collecting gas according to a specific embodiment of the present invention.

[0030] Figure 6 It is a schematic diagram of the overall hardware design composition of a specific implementation method of the present invention.

[0031] Figure 7 It is a circuit diagram of a wind turbine generator according to a specific embodiment of the present invention.

[0032] Figure 8 It is a single chip microcomputer and peripheral circuit diagram of a specific implementation mode of the present invention.

[0033] Fig. 9 It is a LCD12864 display circuit diagram of a specific implementation mode of the present invention.

[0034] Fig.10 It is a signal processing circuit diagram of a specific implementation mode of the present invention.

[0035] Fig.11 It is the main program design flow chart of the specific implementation mode of the present invention.

[0036] Fig.12 It is an A / D conversion flow chart of a specific implementation mode of the present invention.

[0037] Fig.13 It is a program flow chart of LCD12864 display according to a specific implementation mode of the present invention.

[0038] Fig.14 It is a schematic diagram of producing hydrogen by electrolyzing water at a voltage of 5V with the addition of a catalyst according to a specific embodiment of the present invention.

[0039] Fig.15 It is a schematic diagram of the display screen display situation of a specific implementation mode of the present invention.

[0040] Fig.16 It is a schematic diagram of the initial value of the hydrogen concentration according to a specific embodiment of the present invention.

[0041] Fig.17 It is a schematic diagram of hydrogen concentration detection value according to a specific embodiment of the present invention.

[0042] Fig.18It is a schematic diagram showing the electrolyte temperature and the supply voltage according to a specific embodiment of the present invention.

[0043] Fig.19 It is a schematic diagram of an overall device of a specific implementation mode of the present invention. DETAILED DESCRIPTION

[0044] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0045] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein like reference numerals refer to like parts unless otherwise specifically stated.

[0046] 1 Hydrogen production principle and device design

[0047] 1.1 Introduction to the Island Hydrogen Production Project

[0048] 1.1.1 Hydrogen production on islands in actual production

[0049] The realization of the island hydrogen production project requires the construction of an offshore plant, which uses a large amount of solar energy to electrolyze seawater into hydrogen and oxygen, and then stores the hydrogen and transports it to land. Hydrogen production projects require a large amount of energy input. In order to avoid polluting the land and water environment, these projects are usually built on the ocean. The ocean can supply a large amount of seawater and solar energy to the factory, and the ocean space is also large, so there is no need to worry about oppressing the surrounding residents. Several key links involved in the island hydrogen production project include seawater electrolysis, hydrogen storage and transportation.

[0050] The actual steps of hydrogen production engineering are: 1. Seawater electrolysis. The construction site of the project is usually located at sea, and seawater is electrolyzed using renewable energy such as solar energy and wind energy to produce hydrogen and oxygen. This step is one of the most important links in the hydrogen production process, and the efficiency and stability of the electrolysis process must be guaranteed. 2. Hydrogen storage. Due to the high energy and low density of hydrogen, hydrogen storage is a key and complex link in hydrogen production engineering. Hydrogen is usually stored by compressed hydrogen storage and liquefied hydrogen storage. 3. Transportation. Since the construction site of hydrogen production projects is usually located at sea, hydrogen needs to be transported to land for use. Due to the low density of hydrogen, it needs to be transported at high pressure or low temperature to ensure its safety, and the cost and efficiency of transportation also need to be considered. In addition to the above-mentioned key links, issues such as project design and operation management also need to be considered in island hydrogen production projects. Various risk controls need to be done in actual construction and operation to ensure the safety and economic feasibility of the project.

[0051] 1.1.2 Design of a device to simulate hydrogen production on an island

[0052] Based on the actual hydrogen production project, the simulation steps of the hydrogen production project are as follows: 1. Electrolysis of water. Considering the convenience of material selection in the actual design, seawater is not needed and tap water can be used directly for simulation. Wind energy will be used for electrolysis in terms of renewable energy. 2. Hydrogen storage. The device actually collects hydrogen by using a scrubber to discharge air downwards according to the characteristics of hydrogen. 3. Filtration. This design requires that no transportation is required, and a filtration part is added to filter out water vapor in the hydrogen. Based on the island hydrogen production project, a micro water electrolysis hydrogen production device will be designed. According to the principle of hydrogen production, the electrolyte and temperature will be demonstrated, and then the design of several key links such as wind power generation, filtration and collection devices will be designed to finally complete the design of the hydrogen production device.

[0053] 1.2 Principle of hydrogen production

[0054] 1.2.1 Principle of Hydrogen Generation by Water Electrolysis

[0055] The process of producing hydrogen by electrolysis of water is to use electricity to electrolyze water into hydrogen and oxygen. This process takes place in an electrolyzer, which has two electrodes, namely the anode and the cathode. When the electrolyzer is powered on, the current enters the water, and the hydrogen ions in the water move toward the cathode and are oxidized into hydrogen. At the same time, the oxygen ions in the water move toward the anode and are reduced to oxygen. Through the principle of hydrogen production, we can see that the production of hydrogen by electrolysis of water only produces oxygen and hydrogen, both of which are environmentally friendly and valuable gases, and there is no pollution or harmful gases, which has far-reaching significance for environmental protection and sustainable development. The production of hydrogen by electrolysis of water can be divided into alkaline water electrolysis and acidic water electrolysis according to the acidity and alkalinity of the electrolyte. The schematic diagram of the electrolysis principle of alkaline water electrolysis is shown in the figure. Figure 1 As shown, the principle diagram of acidic water electrolysis is as follows Figure 2 shown.

[0056] The chemical reaction formula for hydrogen production by electrolysis of water in alkaline and neutral electrolysis of water is: cathode: 4H 2 O+4e - =2H 2 ↑+4OH - , anode: 4OH - -4e - =2H 2 O+O 2 ↑, overall reaction formula: 2H 2 O=2H 2 ↑+O 2 ↑.

[0057] The chemical reaction formula for hydrogen production by electrolysis of water in acidic electrolysis of water is: cathode: 4H + +4e - =2H 2 ↑, anode: 2H 2 O-4e - =4H+ +O 2 ↑, overall reaction formula: 2H 2 O=2H 2 ↑+O 2 ↑.

[0058] 1.2.2 Principles of Electrolyte Selection

[0059] When electrolyzing water, pure water is a weak electrolyte and therefore difficult to ionize, and its conductivity is relatively low. Therefore, it is necessary to add appropriate electrolytes to improve the conductivity of the solution so that water can electrolyze hydrogen and oxygen smoothly. When selecting electrolytes, it is necessary to consider whether it will affect the electrolyzed substances. After direct current is passed through the aqueous solution with electrolytes, the decomposed substances do not change much due to the addition of certain electrolytes. Only the water solvent of the solution is decomposed, and the original electrolyte remains in the water. For example, sulfuric acid, potassium hydroxide, sodium hydroxide, etc. belong to this type of electrolyte. Therefore, the selection of this type of electrolyte can avoid the generation of impurities and ensure that the generation of hydrogen is not affected by impurities.

[0060] According to the activity of metal ions in aqueous solution, they can be ranked as follows: K, Ca, Na, Mg, Al, Zn, Fe, Sn, Pb, H, Cu, Hg, Ag, Pt, Au. The metals in the front are more active than those in the back, and the more active the metal, the easier it is to lose electrons. On the contrary, the less active the metal, the less likely it is to lose electrons. K and Na are more active metals. In industry, KOH or NaOH aqueous solution is generally used as electrolyte for electrolysis of water to produce hydrogen. By comparing KOH and NaOH, it is found that although KOH has better conductivity than NaOH, it is more expensive, and KOH is more corrosive to the electrolytic cell under high temperature conditions. Therefore, considering all factors, NaOH is selected as the electrolyte. As a strong electrolyte, NaOH can almost completely ionize sodium ions and hydroxide ions that can move freely in water. Adding sodium hydroxide increases the ion concentration, thereby enhancing the conductivity of the solution.

[0061] Theoretically, the higher the electrode potential of a metal ion, the less likely it is to lose electrons. The more active a metal ion is, the lower its electrode potential is, so it is easy to lose electrons and difficult to become an atom. On the contrary, a metal with low activity, i.e., high potential, is more likely to become an atom. According to the order of activity, it can be seen that H + The activity of Na + The lower the H + It is easier to get electrons to become hydrogen atoms. Therefore, when H + and Na + When H + It will react more easily and will first gain electrons at the cathode to become hydrogen, while Na +The electrolyte will remain in the solution without reacting, so there will be no situation where the electrolyte takes over.

[0062] 1.2.3 Justification for the selection of electrolytic water temperature

[0063] The rate of hydrogen production by water electrolysis is affected by temperature. Generally, the reaction rate becomes faster as the temperature increases. This is because the increase in temperature increases the thermal motion of water molecules, making it easier for them to react with ions on the electrode. Therefore, under the condition of a single variable, increasing the temperature can increase the efficiency of hydrogen production by water electrolysis. In addition, temperature also affects the conductivity of water. Conductivity is the ability of electric current to pass through a substance, and the conductivity of water increases with increasing temperature. This means that under the same current density conditions, the higher the temperature, the higher the efficiency of hydrogen production by water electrolysis.

[0064] Table 1.1 Theoretical relationship between temperature and hydrogen production efficiency

[0065]

[0066] Temperature is one of the important factors that affect the efficiency of hydrogen production by water electrolysis. Increasing the temperature can improve the efficiency of hydrogen production by water electrolysis. The theoretical data of temperature and hydrogen production efficiency as shown in Table 1.1 show that when the temperature rises to 45°C, the efficiency of hydrogen production by water electrolysis has reached 91.7%. Therefore, in practical applications, in order to improve the efficiency of hydrogen production by water electrolysis, we should increase the temperature as much as possible. At the same time, it is also necessary to pay attention to controlling the temperature in the electrolyzer. It is found from the table that when the temperature of water electrolysis reaches 45°C, its hydrogen production efficiency is as high as 90%. The hydrogen production efficiency will not change much at higher temperatures, so there is no need to increase the temperature too high. At the same time, controlling the temperature not too high can avoid the impact of high temperature on the efficiency of hydrogen production by water electrolysis and the electrolyzer.

[0067] 1.3 Design of hydrogen production device

[0068] 1.3.1 Overall design process

[0069] The hydrogen production device is centered on the electrolyzer. The wind turbine rotates to supply power to the electrolyzer. At the same time, the wind turbine stores the surplus power in the lithium battery through the charging module, and finally filters and collects it. The overall flow chart of the hydrogen production device is as follows: Figure 3 As shown:

[0070] 1.3.2 Wind power generation design

[0071] The wind power generation part consists of a wind turbine and fan blades. In order to simulate the wind on the island blowing the fan blades of the wind turbine, a hair dryer will be used to simulate the sea breeze. Through the measurement of the multimeter, it can be seen that the wind turbine can provide about 5V of direct current driven by the hair dryer. The actual power generation is somewhat different from the ideal power, but it reaches the theoretical power required for electrolyzing water to produce hydrogen. Hydrogen can be produced, and the wind turbine is supported by a bracket. Through actual operation, it is found that 5V of electricity can electrolyze water to produce hydrogen. In a certain electrolysis time, more hydrogen can be produced, which is enough to meet the requirements of hydrogen production, so that the hydrogen concentration can be monitored. Therefore, based on the above demonstration of catalysts and temperature, it will be considered to use catalysts and increase the temperature of electrolyzed water, so that the 5V voltage provided by wind power generation can charge the rechargeable battery, thereby electrolyzing a large amount of hydrogen.

[0072] Using wind power to provide stable power is an important requirement of the overall design. In order to provide a stable power supply, a rechargeable battery will be designed. The purpose of the rechargeable battery is that when there is no wind, the battery can provide power for the electrolyzer. The amount of power can be controlled according to the number of batteries in series to ensure a relatively stable power supply.

[0073] 1.3.3 Design of electrolytic cell and rechargeable battery

[0074] The electrolyzer used is a finished product of a micro-electrolyzer hydrogen production device teaching instrument. The main body is made of transparent plastic, and the gas outlet uses a latex connecting tube to lead the gas out. The electrodes are ordinary metal electrodes, the red one is the positive electrode, which electrolyzes oxygen, and the black one is the negative electrode, which electrolyzes hydrogen.

[0075] The +-pad next to the Type-C socket of the charging module is the power input terminal. The positive and negative poles of the wind turbine are connected to it accordingly. B+ and B- are connected to the positive and negative poles of the lithium battery respectively. OUT+ and OUT- are connected to the positive and negative poles of the electrolyzer respectively. The actual connection of the charging module is as follows: Figure 4 shown.

[0076] 1.3.4 Selection of filtration reagents

[0077] The purity of hydrogen produced by electrolysis of water is theoretically relatively high. The main impurity gas is water vapor that will be carried during the electrolysis process. In particular, the higher the temperature of the electrolysis water, the greater the interference of water vapor. From the argument of the selection of the electrolysis water temperature, it can be seen that the electrolysis water for preparing hydrogen will require a higher temperature, so the main object of filtration is water vapor. To filter out the impurity water vapor in hydrogen, you can choose a desiccant. When choosing a desiccant, the principle is that the desiccant cannot react with the substance to be dried. Hydrogen is a neutral gas. Generally, except for some strong oxidants, it is usually not easy to react. Neutral alkaline and acidic desiccants can be used. Even concentrated sulfuric acid cannot oxidize hydrogen. Therefore, almost all common desiccants can be used to remove water vapor from hydrogen, such as phosphorus pentoxide, concentrated sulfuric acid, anhydrous calcium chloride or soda lime, etc., which have good treatment effects. If concentrated sulfuric acid is used, the prepared hydrogen can be passed through an absorption tube containing concentrated sulfuric acid. If soda lime is used, the hydrogen can be passed through a glass drying tube containing soda lime.

[0078] Comparison between concentrated sulfuric acid and soda lime: concentrated sulfuric acid is highly corrosive, irritating, acidic and oxidizing. If it accidentally drips onto your hands, it will cause severe burns. It is quite dangerous and also harmful to the environment. It will pollute the soil and water and is difficult to preserve. The chemical formula of soda lime is Ca(OH) 2 , is a very common substance and is widely used in food processing, so it is very safe, cheap and easy to buy. Based on the design of environmentally friendly principles, dangerous and environmentally harmful concentrated sulfuric acid is not used. Therefore, soda lime is selected to dry hydrogen after comprehensive consideration.

[0079] 1.3.5 Design of hydrogen collection device

[0080] The gas density of hydrogen is smaller than that of air and it is insoluble in water, so the downward air discharge method and the water discharge method can be used to collect hydrogen. The downward air discharge method requires the collection device to be turned upside down, with the hydrogen input end close to the bottom of the device and the output end close to the bottle mouth of the device, so that the hydrogen will first fill the top of the device and the air below will be discharged. The water discharge method is to fill the collection device with water and use the "short in and long out" method, that is, the hydrogen input end enters from the short pipe mouth, the hydrogen will run to the top of the water, and the water will be squeezed out in the long pipe.

[0081] Although hydrogen will escape from another port in the downward air discharge method, since hydrogen density is very low, hydrogen will be concentrated at the bottom of the inverted bottle. When detecting hydrogen, place the sensor at the bottle mouth and hydrogen will flow out slowly, making it easy to detect hydrogen concentration and avoiding the situation where hydrogen escapes all at once and cannot be detected in time. In the case of the water discharge method, water will be discharged, and the water in the gas washing bottle must be drained before the hydrogen concentration can be detected, which is more troublesome. Therefore, after comprehensive consideration, the downward air discharge method is chosen to collect hydrogen. The density of oxygen is similar to that of air, so it is not suitable for the air discharge method, and oxygen is insoluble in water, so the water discharge method is used for collection. In actual collection, a gas washing bottle is used to collect hydrogen. The bottle mouth of the gas washing bottle is equipped with a rubber stopper and a glass tube. The device for collecting hydrogen and oxygen is as follows: Figure 5 As shown (Note: There will be hydrogen leakage during the measurement of hydrogen concentration, avoid open flames).

[0082] 2 Hardware Selection and Design

[0083] 2.1 Hardware comparison and selection

[0084] 2.1.1 Overall Hardware Design

[0085] The whole system can be divided into wind power generation module, main control system module, LCD display module and signal processing module. The overall hardware design consists of Figure 6 As shown. The wind power generation module consists of a wind turbine and a rechargeable battery, which are connected by a charging module; the main control system uses the STC89C51 single-chip microcomputer chip as the control body; the LCD display module uses the LCD12864 display; the signal processing module uses the MQ-8 hydrogen sensor to measure the hydrogen concentration data, and uses the BS18B20 to detect the temperature of the electrolyte. The ET2046 chip is used to perform A / D conversion processing on the signal, and the processed digital quantity is displayed on the display screen in real time.

[0086] The wind power generation module provides power for the electrolysis device. In order to control the stability of hydrogen production according to the wind force, a rechargeable battery is used. The wind turbine can charge the rechargeable battery, and the charged electricity can power the electrolyzer. The function of the rechargeable battery is that when the wind force is small, the power in the rechargeable battery can continue to power the electrolyzer, thus solving the problem of no wind and no power supply. The STC89C51 selected by the main control system module is the core controller of the system, which will process various instructions. The LCD12864 display selected by the LCD display module will not only display the hydrogen concentration, but also the electrolyte temperature and the amount of electricity generated by wind power generation. The single-chip microcomputer, display screen and other modules used only need a voltage of 5V. The state of hydrogen production concentration is indicated by the on and off of the LED light.

[0087] The hydrogen sensor module uses the MQ-8 hydrogen concentration sensor, which has an analog output of 0 to 5V voltage. The voltage change of the sensor is proportional to the hydrogen concentration, that is, the higher the concentration, the higher the voltage. Therefore, the hydrogen concentration data can be simulated based on the linear relationship between voltage and concentration. The hydrogen concentration measurement range of the module is 0 to 1000ppm. According to the linear relationship between voltage and hydrogen concentration, a voltage of 5V corresponds to a hydrogen concentration of 1000ppm. Through relationship conversion, the simulated concentration data is displayed on the LCD in the form of digital quantity. If the hydrogen concentration exceeds a certain value, the specified LED light can be lit.

[0088] 2.1.2 Comparison and selection of single chip microcomputers

[0089] Alternative 1: Atmel AVR series microcontrollers. They are 8-bit and 32-bit microcontrollers with high cost performance and are relatively simple to program and debug, but they have low performance and limited storage space.

[0090] Alternative Option 2: STM32 series microcontrollers. They have the characteristics of high performance, low power consumption, rich peripheral resources, and a variety of memory types, and have broad application prospects.

[0091] Alternative solution 3: STC89C51 microcontroller. This is a high-performance, low-power 8-bit microcontroller. It is widely used, but its disadvantages are that the A / D function needs to be expanded and the running speed is slow. Through comprehensive comparison, this system finally chooses the STC89C51 microcontroller as the system controller.

[0092] 2.1.3 Comparison and selection of hydrogen concentration sensors

[0093] Alternative solution 1: ME3-H2 hydrogen electrochemical gas sensor. This sensor has the characteristics of high sensitivity, low power consumption, high precision, wide linear range, strong anti-interference ability and excellent stability, and the measurement range is 0-1000ppm. According to the electrochemical principle, the sensor forms a current through an external circuit, and the current is proportional to the gas concentration. According to the linear relationship, the electrical quantity of the target gas can be measured.

[0094] Alternative Option 2: TGS2615 hydrogen gas sensor. This sensor can eliminate the influence of interfering gases such as alcohol, has a filter layer with enhanced selectivity, low power consumption, high service life, and simple application circuit. The measurement range is 40-4000ppm. Although the measurement range is large, it is relatively expensive, and the detected hydrogen does not contain much interfering gas, so this sensor is not selected.

[0095] Alternative solution three: MQ-8 hydrogen sensor module. This sensor module can perform TTL output test and analog quantity test. The analog quantity test is the analog quantity of hydrogen concentration. The higher the concentration, the higher the voltage. The linear relationship between voltage and hydrogen concentration can be used to determine the generation of high concentration hydrogen. It is cheap. In addition, for economic considerations, the sensor module is low in price and can reduce the design cost of the system device. Comprehensive considerations make this sensor module a better choice.

[0096] 2.1.4 Comparison and selection of displays

[0097] Alternative solution 1: LCD1602 liquid crystal display. This widely used character type liquid crystal display module can display two lines of characters in the form of 16 characters. It is widely used because of its simple structure and low price. It can be connected to a single chip microcomputer or other controller to display text, graphics and other information, but its disadvantage is that it cannot display Chinese characters.

[0098] Alternative Option 2: LCD12232 Liquid Crystal Display. LCD12232 is a high-resolution graphic liquid crystal display that can display numbers, symbols, graphics and Chinese characters. This display is usually more complex. In order to avoid damage to the display due to improper use, LCD12232 liquid crystal display is not used.

[0099] Alternative solution three: LCD12864 liquid crystal display. Under the control of the single-chip microcomputer, the LCD12864 liquid crystal display can display a variety of information such as graphics, characters, dynamic effects, etc., and can also adjust the clarity of the screen display. Compared with the LCD12232 liquid crystal display, the display screen is larger and more convenient to observe. After demonstration, LCD12864 was selected as the display module for this design.

[0100] 2.2 Hardware Design

[0101] 2.2.1 Wind power generation circuit

[0102] Wind power generation circuit Figure 7As shown, this circuit is only a simulation circuit for wind power generation micro-design, and is not suitable for actual wind power generation applications. The circuit consists of a wind turbine, a TP4056 charging module and a battery interface. The wind turbine rotates to convert mechanical energy into electrical energy to provide power for the electrolyzer. When the wind is strong, such as when a hair dryer is used to blow, the motor voltage does not carry LED lights and other loads, and the no-load voltage can easily reach about 20V. However, when the electrolyzer is actually connected, the voltage provided is only about 5V, but it can also meet the voltage required for electrolysis of water in theory. The charging module can store the electricity generated by the wind turbine in a rechargeable battery, specifically a lithium battery. The lithium battery uses a flat-head 18650 lithium battery. The working voltage of the lithium battery is generally between 2.5V and 4.2V, and one lithium battery is 3.7V. In this way, the voltage provided by one lithium battery can be basically close to the voltage provided by the wind turbine to the electrolyzer.

[0103] Introduction to TP4056 charging module: This module is a chip specially developed for single-cell lithium battery charging management. With the special internal structure of MOSFET and anti-reverse charging circuit, TP4056 does not require external isolation diodes and detection resistors. The operating voltage range of this module is 4.5V~5V, and the maximum charging current allowed is 1000mA. The type-c female socket of the module and the + / - pad next to it are the power input terminals, with an input voltage of 5V. The B+ port is connected to the positive electrode of the lithium battery, and the B- port is connected to the negative electrode of the lithium battery.

[0104] 2.2.2 Main control system and its peripheral circuits

[0105] The processor in this system is the STC89C51 microcontroller, and the peripheral circuits include a reset circuit and a crystal oscillator circuit. They can be used by connecting the voltage, and the pins are connected to the pin header to facilitate the subsequent connection of various required modules. Figure 8 shown.

[0106] 2.2.3 Introduction to STC89C51 MCU

[0107] The STC89C51 microcontroller is based on the 80C51 core, has two different clock modes, 1T and 2T, and a main frequency of up to 33MHz. It features programmable Flash memory, RAM memory, and a large number of peripheral interfaces such as timers, serial communication ports, and parallel ports. The STC89C51 series microcontrollers have the ability to run programs in high-level programming languages ​​such as C language and assembly language, so they are suitable for a wide range of application scenarios.

[0108] The STC89C51 microcontroller has the advantages of being relatively cheap, cost-effective, suitable for medium and small engineering development, and having a relatively large built-in Flash memory capacity, which can meet the needs of relatively complex applications. The disadvantage is that the integration of the microcontroller is relatively low, and a large number of external circuits and peripherals are required, which increases the difficulty and cost of hardware development. In addition, the microcontroller instruction set and registers are relatively old, and have poor compatibility with modern microcontrollers. In summary, the STC89C51 microcontroller is a microcontroller with a high cost-effectiveness, rich peripheral interfaces and strong system performance, but compared with modern microcontrollers, it lacks certain modern characteristics and has poor compatibility. When selecting a microcontroller, it is necessary to make choices based on specific application requirements in order to flexibly adapt to various application requirements.

[0109] 2.2.4 LCD12864 display circuit

[0110] LCD12864 display circuit Fig. 9 As shown, the module is driven by 5V voltage, which is the same as the driving voltage of the microcontroller, so the same VCC can be used. Since the display needs to display the data of three indicators, a serial connection method is used. The display can display Chinese characters, characters and numbers, so LCD12864 meets the display function required by the system. When displaying letters and numbers, LCD12864 can display 4 lines, and each line can display 16 letters or numbers. It is worth noting that numbers and letters cannot display an odd number; when displaying Chinese characters, it can display 4 lines, and each line can display 8 Chinese characters. If the display screen displays one indicator per line, it can display at least four indicators, so it is more than enough for the three indicators that need to be displayed this time.

[0111] The main pins used by the display and their functions are shown in Table 2.1. LCD12864 has a total of 20 pins, of which GND and VCC at pins 1 and 2 are two power pins; CS chip select pins at pins 4 to 6 can accept data at high voltage and latch at low voltage, RW pin is the serial data input terminal EN pin is the serial synchronous clock; pins 7 to 14 are 8-bit data transmission ports, namely DB0 to DB7; CS1 at pin 15 is the serial / parallel interface selection port, which can control the communication mode between LCD12864 and the microcontroller. If the input is high level, the communication mode between LCD12864 and the microcontroller is parallel communication, and low level is serial communication. This system uses serial communication and low level; pins 16 and 17 are empty pins and do not need to be connected; LED_A and LED_B at pins 19 and 20 are two power backlight pins, which can be used to control the brightness of the LCD screen. Write commands can control the mode and working status of the LCD, and then write data to let the LCD display the required interface.

[0112] Table 2.1 Main pins and functions of LCD12864 display

[0113]

[0114] LCD12864 is a 128×64 dot matrix LCD screen, which is a square or nearly square rectangle with a size of about 65 mm × 40 mm. It has a main display area, which is a central rectangular area that occupies most of the entire screen.

[0115] 2.2.5 Signal Processing Circuit

[0116] The circuit includes hydrogen sensor, temperature and voltage interface circuit. The STC89C51 used in the main control system does not have an internal ADC interface, so an external A / D module is required. Therefore, the signal processing circuit uses the ET2046 (also called XPT2046) analog-to-digital converter for A / D conversion to assist in the measurement of analog quantities of wind power input voltage, temperature and hydrogen concentration output. The reason for A / D conversion is that the 51 microcontroller uses digital quantities when it is running internally, that is, binary numbers composed of 0 and 1, and cannot recognize analog quantities. Therefore, it is necessary to use A / D conversion to convert unrecognizable analog quantities into recognizable digital quantities. Signal processing circuit such as Fig.10 shown.

[0117] Since the circuit is integrated, the control pins of the ET2046 chip are connected to the P3.4~P3.7 pins of the microcontroller, and the ADC input conversion channel AIN of the ET2046 chip is connected to the hydrogen thermistor and potentiometer respectively, and the temperature is controlled through the P3.7 pin.

[0118] ET2046 has built-in high-speed ADC, which is a successive approximation A / D converter. ET2046 has sampling, holding, analog-to-digital conversion and serial data output functions, and its low-voltage I / O interface voltage operates in the range of 1.5V to 5.25V.

[0119] The hydrogen sensor uses the MQ-8 sensor, and its signal is controlled by AIN0 of ET2046. In the voltage measurement module, since the output voltage of ET2046 cannot be greater than 5V, and the actual voltage generated by wind power generation may be greater than 5V, a potentiometer can be connected to adjust the potentiometer so that the output voltage of the detection is within 5V. The actual displayed voltage can be multiplied by the corresponding proportion of the data to display the actual voltage generated by wind power generation.

[0120] The temperature measurement module uses the DS18B20 module. The temperature measurement range of DS18B20 is between -55℃ and +125℃, and the maximum error is about 0.4℃. The microcontroller and the temperature sensor module communicate using a single bus, that is, a single line is used to send and receive data. The P3.7 pin signal connection is used here. No peripheral components are required during use, and the independent chip can complete the work. The pin functions of DS18B20 are shown in Table 2.2:

[0121] Table 2.2 DS18B20 sensor pin functions

[0122]

[0123] The main material of the MQ-8 hydrogen sensor is tin dioxide semiconductor gas-sensitive material. During the heating process, the tin dioxide material absorbs oxygen from the air, which causes the semiconductor electron density to decrease and eventually increases the semiconductor resistance value. When the sensor comes into contact with hydrogen, the surface conductivity will change with the change of hydrogen concentration. According to this characteristic, the information of the existence of hydrogen can be captured. It can be seen that as the concentration of hydrogen increases, the output analog signal will become larger. After the analog-to-digital conversion circuit and formula conversion, the concentration of the gas can be obtained. The pin functions of the MQ-8 hydrogen sensor are shown in the table, where DO is the high and low level output terminal of TTL, and AO is the analog voltage output terminal, which is used to display the analog value of hydrogen concentration. The pin functions of the MQ-8 hydrogen sensor are shown in Table 2.3:

[0124] Table 2.3MQ-8 hydrogen sensor pin functions

[0125]

[0126] 3. Software Programming

[0127] 3.1 Main program design

[0128] The design of the main program module combines the use process of each sub-program module as the main body of the entire software program design. After the main program module is powered on by the power module, the program is initialized first, and the analog quantity detected by each sensor is transmitted to the A / D conversion module. After A / D conversion, the digital quantity is obtained. The actual digital quantity to be output can be obtained through formula conversion, and finally the real-time digital quantity is displayed on the display. Fig.11 This is the workflow diagram of the main program.

[0129] 3.2A / D conversion program design

[0130] 3.2.1 Overall A / D Conversion

[0131] The A / D conversion module includes hydrogen concentration A / D conversion, temperature A / D conversion and voltage A / D conversion. The module performs A / D conversion through the chip ET2046. Before performing A / D conversion, it is necessary to initialize first, and then convert the analog quantity into a digital quantity through a series of steps such as ADC sampling, holding, quantization and encoding to achieve the goal of A / D conversion. Sampling is to convert continuous analog quantity into discrete analog quantity, while holding is to store the sampled analog quantity for later use, quantization is to convert the sampled level into a discrete digital level close to its initial level, and programming is to express the quantization result in digital form. After the A / D conversion is completed, the microcontroller will read and output the converted digital quantity, thus completing the A / D conversion. The A / D conversion process is as follows Fig.12 shown.

[0132] The voltage driving the A / D module will use the 5V voltage input from the external power module, and the analog signals of hydrogen concentration, voltage and temperature of X+, Y+ and DOUT enter the A / D module. The data interface of ET2046 is a serial interface. When communicating between the processor and the converter, eight clock cycles are required. Synchronous serial interfaces such as SPI, SSI, etc. can be used. Each complete conversion requires 24 serial synchronous clocks to complete.

[0133] 3.2.2 Hydrogen concentration A / D conversion

[0134] The hydrogen sensor transmits the hydrogen concentration signal to ET2046 through the AO port and the 6th pin of ET2046, that is, the X+ pin. By writing a program, the analog value of hydrogen concentration is converted into a digital value. The ADC value of hydrogen concentration can be obtained according to the linear relationship between voltage and concentration and the formula of digital-to-analog conversion. The linear relationship and formula are as follows. Among them, 5 is 5V voltage, 4096 is the AD value range of 0~4095, a total of 4096 bits, and the hydrogen concentration sensor output 0~5V corresponds to 0~1000ppm.

[0135]

[0136]

[0137] 3.2.3 Temperature A / D Conversion

[0138] DS18B20 uses a single-line communication method, sending and receiving through the same communication pin. The A / D conversion program design first initializes the pin, which includes setting the input and output status of the DQ pin and pulling the DQ pin high or low, as well as delaying for a period of time, and then sending instructions. After receiving the instructions, the main control chip will read the data on the pin, and finally the main control chip will perform relevant calculations to process the data.

[0139] The temperature value detected by the probe in real time is the binary number returned by DS18B20 at this time. The upper five bits of the binary number represent the positive or negative value. If the upper five bits are all 1, the output temperature value is negative; if the upper five bits are all 0, the output temperature value is positive. The last 11 bits of data show the absolute value of the temperature. After converting it into a decimal value and multiplying it by 0.0625, the temperature value at this time can be obtained. Finally, the temperature value +5 is processed to get the final value.

[0140] The purpose of +0.5 is to round the value. The reason is that in C language, when a floating point number is converted to an integer, the digits after the decimal point will be automatically removed, regardless of whether it exceeds 0.5 or not. If the number after the decimal point is originally greater than 0.5, it will exceed 1 after +0.5, so it can be rounded to 1; if the number is less than 0.5, even if 0.5 is added, the unit digit will not change, so it will remain the original number.

[0141] 3.3 LCD12864 display program design

[0142] The program design of each pin of LCD12864 is as follows:

[0143] The data pins include DB0~DB7, which realize data transmission between the LCD screen and the single-chip microcomputer. When writing a program, it is necessary to define each data pin as the input or output port of the single-chip microcomputer, and read or write the corresponding data in the program as needed. The control line pins include CD, RW and E function lines. The CD pin is connected to the single-chip microcomputer through the P2.2 pin to determine whether the data received by the LCD screen is an instruction or a character, and its state controls whether the data received by the LCD is a character to be displayed. The RW pin is connected to the P2.1 pin of the single-chip microcomputer, which defines the read and write status between the LCD and the single-chip microcomputer. It is an input signal. When the RW pin is at a logic high level, it indicates that the LCD enters the read state; when it is at a logic low level, it indicates that the LCD enters the write state. The E pin is connected to the P2.0 pin of the single-chip microcomputer, which is a timing signal that controls LCD data transmission and starts LCD internal operations. When the LCD executes data writing, it must receive the rising edge of E to transmit data. Therefore, when writing a program, it is necessary to control the output level of the E port according to specific needs to ensure that the timing control is correct. In addition, there is a backlight control pin, which can adjust the brightness of the screen backlight through program control.

[0144] The implementation process of LCD12864 displaying text:

[0145] First, you need to add header file support. After adding macro definition, you can include font header file. Then add header file in the main function source file, and call display function in the main function. To make the called function display, you must first call initialization function to initialize the internal registers of the display. Then call clear screen function to realize line break display. After four cycles, the display will stop at the last line.

[0146] The usage process of LCD12864 display module is as follows Fig.13 shown.

[0147] 4. Prototype debugging

[0148] 4.1 Hydrogen production unit commissioning

[0149] After assembling the hydrogen production device according to the design process of the hydrogen production device, use a hair dryer to blow at the wind turbine, use a multimeter to detect the voltage at both ends of the electrolyzer, and find that 5V voltage is provided. Observe the condition of the two-stage plates of the electrolyzer. When pure water is used as the electrolyte, a few bubbles begin to appear on the two-stage plates after about one minute of power supply. The rate of bubble generation is very slow and almost no bubbles can be seen. When pure water is used as the electrolyte and the wind turbine power supply is changed to 12V DC power supply, the two-stage plates can produce continuous bubbles, but the bubbles are small, and only a small amount of hydrogen can be obtained after electrolysis for a few minutes.

[0150] As mentioned in the principle of hydrogen production by electrolysis of water, it is necessary to add a catalyst and increase the temperature of the electrolyte. Therefore, by adding an appropriate amount of NaOH solution and preparing an electrolyte at a suitable temperature, it can be found that the electrolysis rate is significantly improved compared to the previous conditions without adding a catalyst and without increasing the temperature. After one minute of preheating, the two electrodes can continuously produce a large number of bubbles, and hydrogen can be collected faster. Under the same conditions just now, the wind power generation was changed to use a power module to provide a 12V voltage. It was found that hydrogen can be produced faster when the voltage was increased. The hydrogen production situation is as follows Fig.14 As shown in the figure, the gas is generated by electrolyzing water with an appropriate amount of NaOH solution and 5V DC. It can be seen from the figure that a lot of hydrogen bubbles are generated at the cathode, and a lot of hydrogen is obtained after two minutes of electrolysis. It can also be seen that the ratio of hydrogen to oxygen is 2:1, which is in line with the principle of hydrogen production by electrolyzing water.

[0151] 4.2 Hardware debugging

[0152] 4.2.1 Hydrogen concentration module debugging

[0153] First, let the water electrolyze for a proper time. After a lot of hydrogen is produced, unplug the hydrogen collection device and place the MQ-8 hydrogen sensor close to the hydrogen outlet conduit, where the outlet conduit has passed through a drying tube containing a desiccant. Wait for about half a minute, and after the hydrogen concentration value stabilizes, you can read the real-time hydrogen production concentration.

[0154] First detect the initial hydrogen concentration, such as Fig.15 As shown, the initial hydrogen concentration is 93ppm. Through the relationship between voltage and hydrogen, we know that the initial output voltage is about 0.5V, with a slight error. After hydrogen is introduced, the display shows the value, such as Fig.16 As shown, the hydrogen concentration is 930ppm, which is very close to the maximum range of 1000ppm, indicating that the produced hydrogen concentration is relatively high. It also shows that the design is capable of detecting hydrogen and meets the requirements for hydrogen production and detection of hydrogen concentration.

[0155] 4.2.2 Debugging of electrolyte temperature and power supply status

[0156] Electrolyte temperature adjustment: When the electrolyte can continuously generate bubbles, place the temperature probe into the electrolyte, and the electrolyte temperature will be displayed on the display in real time. Fig.17 The electrolyte temperature is shown to be 27.9°C. The actual temperature is measured with an electronic thermometer and found to be consistent with the temperature detected by the sensor, both at 27.9°C, indicating that the electrolyte temperature debugging is partially successful.

[0157] Power supply status debugging: two wires are led out from the positive and negative ends of the electrolytic cell, respectively, and connected to the wiring terminals for measuring the power supply voltage. The display screen can display the power supply voltage in real time. Due to the use of lithium batteries, the power supply voltage is always stable at 3.4V regardless of the wind speed. Fig.18 As shown. Wind power generation supplies power to lithium batteries, so the power of lithium batteries will not be exhausted, so it can basically make up for the unstable power supply in the absence of wind. The power supply voltage is not much different from the value measured by the multimeter, so it meets the task of displaying the power supply voltage.

[0158] 4.3 Overall device debugging

[0159] The overall device is a combination of a hydrogen production device and a hardware device. The hydrogen production device also includes a wind turbine, a filter device and a collection device to process the electrolyzer. The hardware device includes a main control circuit, a display circuit, a signal processing circuit and a charging module for wind power generation. Fig.19 shown.

[0160] Those skilled in the art will appreciate that numerous variations to the above description are possible, and that the examples and figures are intended only to describe one or more specific implementations.

[0161] Although what is considered as exemplary embodiments of the present invention has been described and described, it will be understood by those skilled in the art that various changes and substitutions may be made thereto without departing from the spirit of the present invention. In addition, many modifications may be made to adapt specific situations to the teachings of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but the present invention may also include all embodiments and their equivalents that fall within the scope of the present invention.

Claims

1. A micro hydrogen production system for island applications, characterized by: The system utilizes wind energy to simulate hydrogen production by water electrolysis hydrogen production technology, and includes a wind power generation module, a main control system module, an LCD display module and a signal processing module; the wind power generation module includes a wind turbine generator and a rechargeable battery, the wind turbine generator rotates to supply power to an electrolyzer and stores surplus power in the rechargeable battery, tap water is added to the electrolyzer as an electrolyte, and electrolytes are added to the electrolyzer to improve the conductivity of the electrolyte; the main control system module is used as the core controller of the system to process various instructions; the LCD display module is used to display the hydrogen concentration, the electrolyte temperature and the amount of electricity generated by wind power generation; the signal processing module includes a hydrogen sensor and a temperature sensor to measure the hydrogen concentration and the electrolyte temperature respectively.

2. The micro hydrogen production system for island applications according to claim 1 is characterized in that: The wind power generation module also includes fan blades connected to the wind power generator.

3. The micro hydrogen production system for island applications according to claim 1 is characterized in that: The electrolyte is a KOH or NaOH aqueous solution.

4. The micro hydrogen production system for island applications according to claim 1 is characterized in that: The temperature of the electrolyte is 45°C.

5. The micro hydrogen production system for island applications according to claim 1 is characterized in that: A plurality of the batteries are connected in series to ensure a relatively stable power supply.

6. The micro hydrogen production system for island applications according to claim 1 is characterized in that: The hydrogen is collected by using the downward air exhaust method, the collecting device is turned upside down, and the hydrogen sensor is placed at the bottle mouth.

7. The micro hydrogen production system for island applications according to claim 6 is characterized in that: It also includes a desiccant, which is arranged on the gas outlet conduit of the collecting device and is used to filter the impurity water vapor in the hydrogen.

8. The micro hydrogen production system for island applications according to claim 7 is characterized in that: The desiccant is soda lime.

9. The micro hydrogen production system for island applications according to claim 1, characterized in that: The main control system module adopts STC89C51 single-chip microcomputer chip as the control body.

10. The micro hydrogen production system for island applications according to claim 1, characterized in that: The voltage change of the hydrogen sensor is proportional to the hydrogen concentration. The hydrogen concentration data can be simulated according to the linear relationship between the voltage and the concentration. The simulated concentration data can be displayed on the LCD display in the form of digital quantity through relationship conversion.

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