Hydrogen supply system and method and storage medium

Abstract

The invention provides a hydrogen supply system and method and a storage medium, and the hydrogen supply system comprises a power generation device which is used for providing green electricity. And the hydrogen production device is used for electrolyzing water to produce hydrogen by adopting green electricity to obtain hydrogen. And the hydrogen storage device is used for storing or releasing hydrogen. And the controller is used for controlling the hydrogen storage device to store the hydrogen and controlling at least one of the hydrogen production device and the hydrogen storage device to output the hydrogen. Wherein the output flow of the hydrogen is determined based on the hydrogen storage capacity of the hydrogen storage device, and the hydrogen storage capacity of the hydrogen storage device comprises at least two hydrogen storage capacity threshold values corresponding to the output flow of the hydrogen. In the hydrogen storage capacity increasing process of the hydrogen storage device, a first hydrogen storage capacity threshold value corresponding to the fact that the hydrogen is increased from the first output flow to the second output flow is different from a second hydrogen storage capacity threshold value corresponding to the fact that the hydrogen is reduced from the second output flow to the first output flow in the hydrogen storage capacity reducing process of the hydrogen storage device. According to the hydrogen supply system, the hydrogen supply adjusting frequency is reduced, and stable hydrogen supply is achieved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of clean energy utilization, and in particular to a hydrogen supply system, method and storage medium. Background Art

[0002] Green electricity, or green power, refers to electricity generated from renewable energy. During the production process, the carbon dioxide emissions of green electricity are zero or close to zero. Compared with traditional thermal power generation, green electricity has lower pollution emissions, so it is regarded as an environmentally friendly and clean energy.

[0003] Currently, the use of green electricity for chemical synthesis has gradually become a hot topic for enterprises and institutions. However, the contradiction between the frequent fluctuations in renewable energy power generation and the need for stable operation of chemical processes has resulted in no projects being put into production yet. Summary of the invention

[0004] In view of the above problems, embodiments of the present disclosure provide a hydrogen supply system, method and storage medium.

[0005] One aspect of the present disclosure provides a hydrogen supply system, including: a power generation device for providing green electricity. A hydrogen production device for using green electricity to electrolyze water to produce hydrogen. A hydrogen storage device for storing or releasing hydrogen. A controller for controlling the storage of hydrogen by the hydrogen storage device, and controlling at least one of the hydrogen production device and the hydrogen storage device to output hydrogen. Wherein, the output flow rate of hydrogen is determined based on the hydrogen storage capacity of the hydrogen storage device, and the hydrogen storage capacity of the hydrogen storage device includes at least two hydrogen storage capacity thresholds corresponding to the output flow rate of hydrogen. During the process of increasing the hydrogen storage capacity of the hydrogen storage device, the first hydrogen storage capacity threshold corresponding to the increase of hydrogen from the first output flow rate to the second output flow rate is different from the second hydrogen storage capacity threshold corresponding to the decrease of hydrogen from the second output flow rate to the first output flow rate during the process of decreasing the hydrogen storage capacity of the hydrogen storage device.

[0006] According to an embodiment of the present disclosure, the hydrogen supply system further includes: a hydrogen storage sensor for monitoring the hydrogen storage capacity of the hydrogen storage device; a flow sensor for monitoring the output flow rate of hydrogen; and a processor connected to the controller, the hydrogen storage sensor, and the flow sensor, respectively, and the processor is used to determine the output flow rate of hydrogen according to the hydrogen storage capacity of the hydrogen storage device and the hydrogen storage threshold, and send it to the controller for execution.

[0007] According to an embodiment of the present disclosure, the output flow rate of hydrogen includes at least two output flow rate thresholds, and the output flow rate thresholds have a corresponding relationship with the hydrogen storage capacity thresholds. When the hydrogen storage capacity of the hydrogen storage device decreases and reaches one of the hydrogen storage capacity thresholds, the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level lower than the output flow rate threshold corresponding to the current hydrogen storage capacity threshold. When the hydrogen storage capacity of the hydrogen storage device increases and reaches the current hydrogen storage capacity threshold corresponding to the most recent decrease in the hydrogen storage capacity of the hydrogen storage device, the output flow rate of hydrogen remains unchanged until the hydrogen storage capacity of the hydrogen storage device increases to a hydrogen storage capacity threshold that is one level higher than the current hydrogen storage capacity threshold, and the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level higher than the output flow rate threshold corresponding to the higher hydrogen storage capacity threshold.

[0008] According to an embodiment of the present disclosure, the output flow rate of hydrogen includes at least two output flow rate thresholds, each output flow rate threshold corresponds to a set of hydrogen storage capacity thresholds, and a set of hydrogen storage capacity thresholds includes an upper limit of the hydrogen storage capacity threshold and a lower limit of the hydrogen storage capacity threshold. When the hydrogen storage capacity of the hydrogen storage device reaches the upper limit of the hydrogen storage capacity threshold, the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level higher than the current output flow rate threshold. When the hydrogen storage capacity of the hydrogen storage device reaches the lower limit of the hydrogen storage capacity threshold, the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level lower than the current output flow rate threshold.

[0009] According to an embodiment of the present disclosure, the hydrogen production device is connected to the hydrogen storage device through a first pipeline, and the hydrogen storage device outputs hydrogen through a second pipeline. A first flow valve is provided in the second pipeline, and the first flow valve is used to control the flow rate of the output hydrogen. A flow sensor is provided in at least one of the first pipeline and the second pipeline.

[0010] According to an embodiment of the present disclosure, the hydrogen production device is connected to the first branch pipeline and the second branch pipeline respectively through the first main pipeline, the first branch pipeline is connected to the hydrogen storage device, the second branch pipeline is connected to the second main pipeline, the hydrogen storage device is connected to the second main pipeline through the third branch pipeline, and the second main pipeline is used to output hydrogen. The first branch pipeline, the second branch pipeline and the third branch pipeline are respectively provided with a second flow valve, and the second flow valve is used to control the flow rate of the transmitted hydrogen. The flow sensor is provided in at least one of the first main pipeline, the first branch pipeline, the second branch pipeline and the second main pipeline.

[0011] According to an embodiment of the present disclosure, the hydrogen supply system further includes: an energy storage device for storing green electricity or providing electric energy to the hydrogen production device. A power supply sensor for monitoring the rate of change of electric energy output of the power generation device. The controller is also used to control the amount of hydrogen produced by the hydrogen production device according to the rate of change of electric energy output, and / or control the storage or release of green electricity by the energy storage device.

[0012] According to an embodiment of the present disclosure, a hydrogen supply system is used to supply hydrogen to a chemical synthesis device to synthesize chemical products, wherein the chemical products include at least one of ammonia and alcohol.

[0013] According to an embodiment of the present disclosure, the hydrogen in the hydrogen storage device is in a gaseous state, and the internal pressure of the hydrogen storage device is between 1.6 MPa and 70 MPa.

[0014] Another aspect of the present disclosure provides a hydrogen supply method, including: determining the hydrogen storage capacity of a hydrogen storage device. According to the relationship between the hydrogen storage capacity of the hydrogen storage device and a hydrogen storage capacity threshold, determining the output flow rate of hydrogen, the hydrogen storage capacity threshold is multiple, and the multiple hydrogen storage capacity thresholds correspond to multiple hydrogen output flow rate thresholds respectively. Determine the hydrogen production amount of the hydrogen production device. According to the hydrogen production amount and the hydrogen output flow rate, determine the trend of the change of the hydrogen storage capacity of the hydrogen storage device. When the trend of the change of the hydrogen storage capacity is a decrease in the hydrogen storage capacity, and reaches one of the multiple hydrogen storage capacity thresholds, adjust the output flow rate of hydrogen to an output flow rate threshold that is one level lower than the current output flow rate threshold. When the trend of the change of the hydrogen storage capacity is an increase in the hydrogen storage capacity, and reaches the hydrogen storage capacity threshold corresponding to the most recent decrease in the hydrogen storage capacity of the hydrogen storage device, keep the output flow rate of hydrogen unchanged until the hydrogen storage capacity of the hydrogen storage device increases to a relatively higher hydrogen storage capacity threshold, and adjust the output flow rate of hydrogen to an output flow rate threshold that is one level higher than the current output flow threshold.

[0015] Another aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the hydrogen supply method according to an embodiment of the present disclosure.

[0016] According to the embodiments of the present disclosure, adaptive adjustment is performed on the upstream hydrogen production and the downstream hydrogen supply through a specific hydrogen storage device. The specific hydrogen storage device is provided with a hydrogen storage capacity threshold, so that when its hydrogen storage capacity fluctuates near the hydrogen storage capacity threshold, different control standards are adopted in the process of reducing and increasing the hydrogen storage capacity, that is, when the hydrogen storage capacity is reduced to the hydrogen storage capacity threshold, it is reduced to a lower-level output flow rate threshold. If the hydrogen storage capacity of the hydrogen storage device can be increased, when the hydrogen storage capacity threshold is reached again, the lower-level output flow rate threshold is kept unchanged, which can extend the time that the hydrogen output flow rate is in a relatively steady state, reduce the frequency of hydrogen supply regulation, and achieve a stable hydrogen supply to the downstream. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The above contents and other objects, features and advantages of the present disclosure will become more apparent through the following description of the embodiments of the present disclosure with reference to the accompanying drawings, in which:

[0018] Figure 1 The schematic diagram shows the architecture of the hydrogen supply system according to the embodiment of the present disclosure;

[0019] Figure 2 Schematically shows an architecture diagram of a hydrogen supply system according to another embodiment of the present disclosure;

[0020] Figure 3 A control logic flow chart of a hydrogen supply system according to an embodiment of the present disclosure is schematically shown;

[0021] Figure 4 A schematic diagram of a connection structure of a hydrogen supply system according to an embodiment of the present disclosure is shown;

[0022] Figure 5 A schematic diagram of a connection structure of a hydrogen supply system according to another embodiment of the present disclosure is shown;

[0023] Figure 6 The schematic diagram shows an architecture diagram of a hydrogen supply system according to another embodiment of the present disclosure;

[0024] Figure 7 A schematic diagram of an operating condition curve of a hydrogen supply method according to an embodiment of the present disclosure for three consecutive typical days in a certain place is shown;

[0025] Figure 8 A flow chart of a hydrogen supply method according to an embodiment of the present disclosure is schematically shown.

[0026] [Description of Reference Numerals]

[0027] 1-power generation device; 2-hydrogen production device; 3-hydrogen storage device; 4-controller; 5-hydrogen storage sensor; 6-flow sensor; 7-processor; 8-first pipeline; 9-second pipeline; 10-first flow valve; 11-first main pipeline; 12-first branch pipeline; 13-second branch pipeline; 14-second main pipeline; 15-third branch pipeline; 16-second flow valve; 17-energy storage device; 18-power supply sensor. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that in the drawings or descriptions, similar or identical parts use the same figure numbers. The technical features in the various embodiments exemplified in the specification can be freely combined to form a new solution without conflict. In addition, each claim can be used as an embodiment alone or the technical features in each claim can be combined as a new embodiment. In the drawings, the shape or thickness of the embodiment can be expanded and simplified or conveniently indicated. Furthermore, the elements or implementations not shown or described in the drawings are in a form known to a person of ordinary skill in the art. In addition, although demonstrations of parameters containing specific values ​​may be provided herein, it should be understood that the parameters do not need to be exactly equal to the corresponding values, but can be approximated to the corresponding values ​​within an acceptable error tolerance or design constraint.

[0030] Unless there are technical obstacles or contradictions, the above-mentioned various embodiments of the present disclosure can be freely combined to form additional embodiments, and these additional embodiments are all within the protection scope of the present disclosure.

[0031] Although the present disclosure is described in conjunction with the accompanying drawings, the embodiments disclosed in the accompanying drawings are intended to exemplify the preferred embodiments of the present disclosure and should not be construed as limiting the present disclosure. The dimensional ratios in the accompanying drawings are merely illustrative and should not be construed as limiting the present disclosure.

[0032] Although some embodiments of the present general inventive concept have been shown and described, it will be appreciated by those skilled in the art that changes may be made to these embodiments without departing from the principles and spirit of the present general inventive concept, the scope of which is defined by the claims and their equivalents.

[0033] Figure 1 The schematic diagram shows an architecture diagram of a hydrogen supply system according to an embodiment of the present disclosure.

[0034] According to the embodiments of the present disclosure, Figure 1 As shown, the present disclosure provides a hydrogen supply system 100, including: a power generation device 1, for providing green electricity. A hydrogen production device 2, for using green electricity to electrolyze water to produce hydrogen, to obtain hydrogen. A hydrogen storage device 3, for storing or releasing hydrogen. A controller 4, for controlling the storage of hydrogen by the hydrogen storage device 3, and controlling at least one of the hydrogen production device 2 and the hydrogen storage device 3 to output hydrogen. Among them, the output flow rate of hydrogen is determined based on the hydrogen storage capacity of the hydrogen storage device 3, and the hydrogen storage capacity of the hydrogen storage device includes at least two hydrogen storage capacity thresholds corresponding to the output flow rate of hydrogen. In the process of increasing the hydrogen storage capacity of the hydrogen storage device 3, the first hydrogen storage capacity threshold corresponding to the increase of hydrogen from the first output flow rate to the second output flow rate is different from the second hydrogen storage capacity threshold corresponding to the decrease of hydrogen from the second output flow rate to the first output flow rate in the process of decreasing the hydrogen storage capacity of the hydrogen storage device 3.

[0035] In some embodiments, the power generation device is responsible for providing green electricity, that is, electricity generated by renewable energy (such as solar energy, wind energy, etc.) as the energy basis of the entire system. Since the output power of the green electricity will change continuously, the output of hydrogen produced by water electrolysis will also be in a fluctuating state. Therefore, in order to ensure the stable operation of the downstream hydrogen user, a hydrogen storage device is required to regulate the flow of hydrogen supplied to the downstream.

[0036] For example, the power generation device supplies power to the hydrogen production device through electric wires. After the hydrogen production device produces hydrogen, at least part of the hydrogen is transported to the hydrogen storage device through a pipeline, or the generated hydrogen is directly transported to the hydrogen use end (such as a chemical plant, etc.) through a pipeline. The hydrogen storage device transports the stored hydrogen to the hydrogen use end through a pipeline. The controller is connected to the power generation device, the hydrogen production device and the hydrogen storage device through communication cables to control the working status of each device, such as adjusting the hydrogen production amount of the hydrogen production device, and adjusting the output or storage amount of the hydrogen storage device.

[0037] The hydrogen production device uses the green electricity provided by the power generation device to carry out the process of water electrolysis to produce hydrogen, decomposing water into hydrogen and oxygen, of which the hydrogen is collected and used for subsequent applications.

[0038] The hydrogen storage device is used to store the hydrogen produced by the hydrogen production device and release the hydrogen for use when needed. It has sufficient storage capacity to ensure a stable supply of hydrogen.

[0039] For example, the hydrogen storage device can be a high-pressure gaseous hydrogen storage device. It uses high pressure to compress hydrogen and store it in a hydrogen storage tank. This type of hydrogen storage device has the advantages of simple structure, mature technology, easy operation and maintenance. At the same time, the working pressure range of the high-pressure gaseous hydrogen storage device is wide and can be adjusted according to actual needs.

[0040] The hydrogen storage device can also be a cryogenic liquid hydrogen storage device, which liquefies the hydrogen by lowering its temperature and stores it in an insulated container. Since the density of liquid hydrogen is much higher than that of gaseous hydrogen, the cryogenic liquid hydrogen storage device has a higher hydrogen storage capacity. However, this method of hydrogen storage consumes a lot of energy to maintain the low temperature of the hydrogen, and the manufacturing and maintenance costs of the insulated container are also high. Despite this, cryogenic liquid hydrogen storage devices still have broad application prospects in the aerospace field and other occasions that require high energy density and long-term storage.

[0041] The hydrogen storage device can also be a solid-state hydrogen storage device, which uses solid materials (such as metal hydrides, coordinated hydrides, etc.) to store hydrogen. Solid-state hydrogen storage devices have the advantages of high safety, high hydrogen storage density, and easy to carry and transport. At the same time, solid-state hydrogen storage devices can also be used in conjunction with renewable energy such as photovoltaic green electricity or wind power to achieve green production and storage of hydrogen.

[0042] In the hydrogen supply system, the hydrogen storage device plays a vital role. It can not only store a large amount of hydrogen to meet the needs of the system, but also optimize the hydrogen release process through intelligent control strategies. At the same time, the safety of the hydrogen storage device is also an important guarantee for the stable operation of the entire system. Therefore, when selecting and designing a hydrogen storage device, it is necessary to comprehensively consider factors such as its hydrogen storage capacity, working pressure, safety, cost, and compatibility with other system components.

[0043] As the core control component of the system, the controller is responsible for controlling at least one of the hydrogen production device and the hydrogen storage device to output hydrogen. The control strategy determines the output hydrogen flow rate based on the hydrogen storage capacity of the hydrogen storage device. In particular, for example, during the pressurization process of the hydrogen storage device, when the pressure reaches a specific value, the controller will keep the output hydrogen flow rate unchanged. This specific pressure value (i.e., the above-mentioned hydrogen storage capacity indicator) is a key threshold, which represents the pressure point corresponding to the controller changing the output hydrogen flow rate during the depressurization process of the hydrogen storage device.

[0044] It is understandable that, in actual operation, the hydrogen supply amount to the hydrogen user end can also be preset according to the state of the hydrogen supply system and historical experience data. Then, the system determines the output amount or storage amount of the hydrogen storage device according to the preset hydrogen supply amount, the hydrogen production amount of the hydrogen production device and the hydrogen storage amount of the hydrogen storage device, so that the hydrogen production amount of the hydrogen production device and the output amount or storage amount of the hydrogen storage device meet the preset hydrogen supply amount, thereby achieving a dynamic balance state.

[0045] The controller ensures the stability of hydrogen output through a series of intelligent control strategies, which are mainly based on system parameters, pressure changes, and the working status of hydrogen production and storage devices.

[0046] For example, the controller can monitor the key parameters of the hydrogen production device and the hydrogen storage device in real time, such as the amount of hydrogen produced, the pressure and temperature of the hydrogen storage device, etc. And according to the real-time monitored data, the output hydrogen flow rate is adjusted through the feedback mechanism to maintain the steady-state output of the system.

[0047] The controller sets the pressure threshold of the hydrogen storage device. When the pressure reaches or exceeds this threshold, the controller will adopt the corresponding control strategy.

[0048] The pressure threshold may be, for example, a plurality of specific pressure values, and each specific pressure value corresponds to a specific hydrogen output flow rate. For example, the second specific output flow rate corresponds to the first specific pressure value, and the first specific output flow rate corresponds to the second specific pressure value. The first specific pressure value is greater than the second specific pressure value.

[0049] During the pressure increase process of the hydrogen storage device, when the hydrogen increases from the first specific output flow rate to the second specific output flow rate, the corresponding pressure threshold is the first specific pressure value.

[0050] During the depressurization process of the hydrogen storage device, when the pressure drops from greater than the first specific pressure value to the first specific pressure value, the second specific output flow rate is kept unchanged until the pressure drops to the second specific pressure value. The controller adjusts the hydrogen from the second specific output flow rate to the first specific output flow rate to adapt to changes in system demand.

[0051] For another example, the controller can also adjust the working state of the hydrogen production device, such as the current and voltage of water electrolysis, according to the pressure of the hydrogen storage device and the demand for hydrogen, to control the amount of hydrogen produced. It is also responsible for the storage and release management of hydrogen in the hydrogen storage device to ensure that hydrogen can be stably output when needed.

[0052] For another example, a proportional-integral-derivative (PID) control algorithm can be used to make real-time adjustments based on system errors to maintain the stability of hydrogen output.

[0053] For complex and changeable system environments, the controller can also use fuzzy control algorithms to make decisions and adjustments through fuzzy logic to adapt to different system states.

[0054] The controller can also use the learning ability of neural networks to continuously optimize control strategies and improve the adaptability and stability of the system.

[0055] For another example, the controller can be connected to a remote monitoring system to implement remote monitoring and fault diagnosis functions. This helps to find and solve problems in a timely manner and ensure the stable operation of the system. By real-time monitoring and analyzing system data, the controller can diagnose potential faults or anomalies and take appropriate measures to repair or alarm.

[0056] The embodiments of the present disclosure realize the functions of green electricity hydrogen production, hydrogen storage and on-demand output by integrating power generation devices, hydrogen production devices, hydrogen storage devices and controllers. Among them, the intelligent control strategy of the controller ensures the stability and flexibility of hydrogen output, especially when the pressure of the hydrogen storage device changes, by maintaining or changing the hydrogen output flow rate to adapt to different system requirements. This design not only improves the utilization efficiency of hydrogen energy, but also enhances the reliability and stability of the system.

[0057] Figure 2 The schematic diagram shows an architecture diagram of a hydrogen supply system according to another embodiment of the present disclosure.

[0058] According to the embodiments of the present disclosure, Figure 2As shown, the hydrogen supply system also includes: a hydrogen storage sensor 5, which is used to monitor the hydrogen storage capacity of the hydrogen storage device 3. A flow sensor 6, which is used to monitor the output flow rate of hydrogen. A processor 7 is connected to the controller, the hydrogen storage sensor and the flow sensor respectively, and the processor 7 is used to determine the output flow rate of hydrogen according to the hydrogen storage capacity and the hydrogen storage threshold of the hydrogen storage device, and send it to the controller for execution. Among them, the output flow rate of hydrogen includes at least two output flow thresholds, and the output flow threshold has a corresponding relationship with the hydrogen storage threshold. When the hydrogen storage capacity of the hydrogen storage device 3 decreases and reaches one of the hydrogen storage thresholds, the output flow rate of hydrogen is adjusted to an output flow threshold that is one level higher than the output flow threshold corresponding to the current hydrogen storage threshold. When the hydrogen storage capacity of the hydrogen storage device 3 increases and reaches the current hydrogen storage threshold corresponding to the most recent decrease in the hydrogen storage capacity of the hydrogen storage device 3, the output flow rate of hydrogen remains unchanged until the hydrogen storage capacity of the hydrogen storage device 3 increases to a hydrogen storage threshold that is one level higher than the current hydrogen storage threshold, and the output flow rate of hydrogen is adjusted to an output flow threshold that is one level higher than the output flow threshold corresponding to the higher hydrogen storage threshold.

[0059] In some embodiments, for example, a hydrogen storage sensor may be used to monitor the current hydrogen storage capacity of the hydrogen storage device in real time, and a flow sensor may be used to monitor the output flow rate of hydrogen in real time.

[0060] As the computing core of the system, a processor can be used to determine the output flow rate of the output hydrogen according to the sensor data, and control the hydrogen storage capacity of the hydrogen storage device to increase or decrease the hydrogen storage capacity. The processor is connected to each sensor in the system (such as hydrogen storage capacity sensor, flow sensor, etc.) to receive sensor data. In addition, the processor is connected to the controller through a communication cable to send control instructions to the controller. For example, one or more computers in the control center can be used to realize the analysis and calculation of sensor data and the control of each device in the system.

[0061] In this embodiment, the flow sensor can also monitor the hydrogen production of the hydrogen production device, and the processor controls the storage or release of hydrogen in the hydrogen storage device through the controller according to the relative size of the hydrogen production amount and the hydrogen output flow rate.

[0062] The hydrogen in the hydrogen storage device is in gaseous state, for example, and the hydrogen storage sensor may be a pressure sensor, for example, and the corresponding hydrogen storage indicator is a specific pressure value, which may include multiple step-change values, for example. These step-change values ​​correspond to multiple step-change specific hydrogen output flow values.

[0063] For example, when the pressure of the hydrogen storage device reaches the first step change value, the output hydrogen flow rate is set to the first specific hydrogen output flow rate value; when the pressure reaches the second step change value, the output hydrogen flow rate is adjusted to the second specific hydrogen output flow rate value, and so on.

[0064] For another example, during the depressurization process, when the pressure of the hydrogen storage device reaches a certain step change value, the controller will control the current output hydrogen flow rate to be reduced to a relatively lower specific hydrogen output flow rate value.

[0065] During the boosting process, when the pressure of the hydrogen storage device reaches a specific pressure value corresponding to the most recent pressure reduction, the controller will keep the current output hydrogen flow rate unchanged until the pressure is boosted to a relatively higher specific pressure value, and then adjust the output hydrogen flow rate to a relatively higher specific hydrogen output flow rate value to ensure the stability of the system.

[0066] The processor can determine the current internal pressure of the hydrogen storage device and the current flow rate of hydrogen in real time based on the data from the pressure sensor and the flow sensor, and determine the current hydrogen flow rate to be output based on the step changes of the current internal pressure and the specific pressure value.

[0067] At the same time, the processor also performs a pressure-increasing or pressure-reducing operation on the hydrogen storage device according to the current hydrogen production amount and the current output hydrogen flow rate of the hydrogen production device.

[0068] In some embodiments, the output flow rate of hydrogen includes at least two output flow rate thresholds, each output flow rate threshold corresponds to a set of hydrogen storage capacity thresholds, and a set of hydrogen storage capacity thresholds includes an upper limit of the hydrogen storage capacity threshold and a lower limit of the hydrogen storage capacity threshold. When the hydrogen storage capacity of the hydrogen storage device reaches the upper limit of the hydrogen storage capacity threshold, the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level higher than the current output flow rate threshold. When the hydrogen storage capacity of the hydrogen storage device reaches the lower limit of the hydrogen storage capacity threshold, the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level lower than the current output flow rate threshold.

[0069] For example, in the above embodiment, the pressure threshold also includes a third specific pressure value that is less than the second specific pressure value, and the third specific pressure value corresponds to a third specific output flow that is less than the first specific output flow. Then, a set of hydrogen storage thresholds corresponding to the first specific output flow are the first specific pressure value and the third specific pressure value.

[0070] For example, the current output flow rate of hydrogen is the first specific output flow rate, and the current hydrogen storage threshold corresponds to the second specific pressure value. When the hydrogen storage capacity of the hydrogen storage device reaches the first specific pressure value, the output flow rate of hydrogen is increased from the current first specific output flow rate to the second specific output flow rate; when the hydrogen storage capacity of the hydrogen storage device reaches the third specific pressure value, the output flow rate of hydrogen is reduced from the current first specific output flow rate to the third specific output flow rate. This increases the time for the output flow rate of hydrogen to stabilize at the current first specific output flow rate.

[0071] Figure 3 A control logic flow chart of a hydrogen supply system according to an embodiment of the present disclosure is schematically shown.

[0072] Take the four-speed adjustment scheme as an example. Figure 3 As shown in the figure, the pressure index values ​​of the hydrogen storage tank are set from high to low as P1, P2, P3, and P4. The hydrogen supply flow rate of the main pipe (the current output hydrogen flow rate) is from high to low as Q1, Q2, Q3, and Q4. The hydrogen production of the electrolyzer is Q t1 The hydrogen supply flow rate of the main pipe is Q t2 .

[0073] For example, for the hydrogen supply Q2, the upper limit of the hydrogen storage capacity of the hydrogen storage device is P1, and the lower limit of the hydrogen storage capacity is P3. In particular, for the hydrogen supply Q1, the upper limit of the hydrogen storage capacity of the hydrogen storage device is when the storage tank is full, and for the hydrogen supply Q4, the lower limit of the hydrogen storage capacity of the hydrogen storage device is when the storage tank is empty. When the storage tank is close to being full or empty, it is necessary to adjust the hydrogen production and supply in time to avoid the occurrence of the storage tank being full or empty.

[0074] Assume that the hydrogen supply flow rate Q t2 The initial value is Q1, the hydrogen storage tank pressure P t The initial value is greater than P1. At this time, if the wind and solar power generation is low, the hydrogen production of the electrolyzer is Q t1 When it is less than Q1, the pressure in the hydrogen storage tank gradually decreases. When it drops to P2, the hydrogen supply flow rate is adjusted to Q2.

[0075] When the hydrogen supply flow rate is Q2, if the hydrogen production of the electrolyzer is greater than Q2, the pressure of the hydrogen storage tank gradually increases, and when it rises to P1, the hydrogen supply flow rate is adjusted to Q1; if the hydrogen production of the electrolyzer is less than Q2, the pressure of the hydrogen storage tank continues to decrease, and when it drops to P3, the hydrogen supply flow rate is adjusted to Q3.

[0076] When the hydrogen supply flow rate is Q3, if the hydrogen production of the electrolyzer is greater than Q3, the pressure of the hydrogen storage tank gradually increases, and when the pressure rises to P2, the hydrogen supply flow rate is adjusted to Q2; if the hydrogen production of the electrolyzer is less than Q3, the pressure of the hydrogen storage tank continues to decrease, and when the pressure drops to P4, the hydrogen supply flow rate is adjusted to Q4.

[0077] When the hydrogen supply flow rate is Q4, if the hydrogen production of the electrolyzer is greater than Q4, the pressure of the hydrogen storage tank will rise. When the pressure rises to P3, the hydrogen supply flow rate is adjusted to Q3.

[0078] Understandably, Figure 3 The hydrogen supply strategy of the present disclosure is mainly described from the perspective of pressure reduction. Similarly, from the perspective of pressure increase, assuming that the hydrogen supply flow rate Q t2 The initial value of is Q4, the hydrogen tank pressure P t It starts to increase from a state less than P4, and when it reaches P3, the hydrogen supply is adjusted to Q3. Then, when the pressure is greater than P3 but the hydrogen storage amount changes in a decreasing direction, when the hydrogen storage tank pressure reaches P3 again, the current hydrogen supply Q3 is kept unchanged, and so on.

[0079] It is understandable that the multiple step change values ​​may be 4 in the above embodiment, or more or less. Through the control method of the pressure and hydrogen supply flow of the hydrogen storage tank disclosed in the present invention, the amount of hydrogen in the hydrogen storage tank can be kept floating within a certain range, avoiding the situation where there is no hydrogen in the hydrogen storage tank or it is full of hydrogen for a long time, improving the stability of hydrogen supply to the downstream, and improving the utilization rate of the hydrogen storage tank. At the same time, it also makes the capacity configuration of the hydrogen storage device smaller than the traditional solution, reducing the hardware investment cost.

[0080] It is understandable that when the stored hydrogen is in liquid or solid state, the hydrogen storage sensor may be, for example, a sensor for measuring mass, and the hydrogen storage indicator may be certain corresponding specific mass values.

[0081] By introducing multiple step change values ​​and corresponding specific hydrogen output flow values, the embodiment of the present disclosure enables the system to more accurately control the output of hydrogen. At the same time, by utilizing the coordinated work of components such as hydrogen storage sensors, flow sensors, processors, and controllers, the system can monitor and feedback data in real time, make intelligent decisions based on real-time data, and optimize the storage and release process of hydrogen. This design not only improves the stability and response speed of the system, but also enhances the adaptability and flexibility of the system, providing a strong guarantee for the efficient use of hydrogen energy.

[0082] Figure 4 The connection structure diagram of the hydrogen supply system according to an embodiment of the present disclosure is schematically shown.

[0083] According to the embodiments of the present disclosure, Figure 4 As shown, the hydrogen production device 2 is connected to the hydrogen storage device 3 through the first pipeline 8, and the hydrogen storage device 3 outputs hydrogen through the second pipeline 9. A first flow valve 10 is arranged in the second pipeline 9, and the first flow valve 10 is used to control the flow rate of the output hydrogen. The flow sensor 6 is arranged at least at one of the first pipeline 8 and the second pipeline 9.

[0084] In some embodiments, the system's pipeline connections, flow control, and sensor configuration are further refined to ensure efficient, stable, and safe output of hydrogen.

[0085] Green electricity is used to electrolyze water to produce hydrogen, and the generated hydrogen is connected to the hydrogen storage device through the first pipeline. The internal pressure of the hydrogen storage device is monitored in real time by a pressure sensor.

[0086] The output pipeline (second pipeline) is led out from the hydrogen storage device and is used to output hydrogen to an external device or system. A first flow valve is arranged in the second pipeline to accurately control the flow rate of the output hydrogen.

[0087] For example, flow sensors are provided in the first pipeline (connecting the hydrogen production device and the hydrogen storage device) and the second pipeline (output pipeline), so that the flow rate of hydrogen charged from the hydrogen production device to the hydrogen storage device and the flow rate of hydrogen outputted from the hydrogen storage device to the outside can be monitored in real time.

[0088] The controller calculates the current internal pressure of the hydrogen storage device and the current flow rate of hydrogen in real time based on the data from the pressure sensor and the flow sensor, and adjusts the opening of the first flow valve according to a preset intelligent control strategy, thereby accurately controlling the output flow rate of hydrogen.

[0089] When the pressure of the hydrogen storage device reaches a step change of a specific pressure value, the controller will adjust the opening of the first flow valve according to a preset specific hydrogen output flow value to achieve a step change of the flow.

[0090] The controller dynamically adjusts the opening of the first flow valve according to real-time monitoring data and preset intelligent control strategies to ensure the stability and accuracy of hydrogen output.

[0091] During the depressurization process, when the pressure of the hydrogen storage device reaches a certain step change value, the controller will control the first flow valve to reduce the opening, thereby reducing the flow rate of the output hydrogen.

[0092] During the pressurization process, when the pressure of the hydrogen storage device reaches a specific pressure value corresponding to the most recent pressure reduction, the controller will maintain the opening of the first flow valve unchanged until the pressure is increased to a relatively higher specific pressure value, and then adjust the output hydrogen flow rate to a relatively higher specific hydrogen output flow rate value to ensure the stability of the output hydrogen flow rate.

[0093] In addition, the system also has multiple safety protection measures, such as overvoltage protection, overcurrent protection, etc., to ensure that the hydrogen output can be quickly cut off under abnormal circumstances to ensure the safety of the system.

[0094] The disclosed embodiment can, for example, store all the hydrogen produced by the hydrogen production device in the hydrogen storage device, that is, the inlet flow rate of the hydrogen storage device is equal to the hydrogen production of the hydrogen production device, and the outlet hydrogen flow rate is equal to the hydrogen supply of the second pipeline. By setting flow sensors in both the first pipeline and the second pipeline, and introducing a first flow valve to accurately control the flow rate of the output hydrogen, the system can more accurately monitor and control the flow state of hydrogen. At the same time, combined with the pressure sensor and the preset intelligent control strategy, the system can dynamically adjust the flow rate of the output hydrogen according to the real-time data to achieve a step-by-step change in the flow rate. This design system has a simple structure, which not only improves the stability and accuracy of the system, but also enhances the safety and reliability of the system.

[0095] Figure 5 The figure schematically shows a connection structure diagram of a hydrogen supply system according to another embodiment of the present disclosure.

[0096] According to the embodiments of the present disclosure, Figure 5 As shown, the hydrogen production device 2 is connected to the first branch pipeline 12 and the second branch pipeline 13 through the first main pipeline 11, the first branch pipeline 12 is connected to the hydrogen storage device 3, the second branch pipeline 13 is connected to the second main pipeline 14, the hydrogen storage device 3 is connected to the second main pipeline 14 through the third branch pipeline 15, and the second main pipeline 14 is used to output hydrogen. The first branch pipeline 12, the second branch pipeline 13 and the third branch pipeline 15 are respectively provided with a second flow valve 16, and the second flow valve 16 is used to control the flow rate of the transmitted hydrogen. The flow sensor 6 is provided in at least one of the first main pipeline 11, the first branch pipeline 12, the second branch pipeline 13 and the second main pipeline 14.

[0097] In some embodiments, a more complex but more powerful system architecture can be constructed to achieve more precise control over hydrogen transmission and output by adding branch pipes and flow valve configurations.

[0098] Green electricity is used to electrolyze water to produce hydrogen, and the generated hydrogen is distributed through the first main pipeline.

[0099] The hydrogen production device and the hydrogen storage device are connected through the first pipeline to transfer hydrogen from the hydrogen production device to the hydrogen storage device for storage. The hydrogen storage device and the second main pipeline are connected through the third pipeline to release hydrogen from the hydrogen storage device and output it to the outside. The second main pipeline serves as the hydrogen output pipeline of the system and is used to transport hydrogen to external equipment or systems.

[0100] The hydrogen production device is connected to the second main pipeline through a second branch pipeline, providing a bypass for the system to directly output hydrogen to an external device or system when needed.

[0101] For example, flow sensors are provided in the first main pipeline, the first branch pipeline, the second branch pipeline and the second main pipeline. These sensors can monitor the flow of hydrogen in each pipeline in real time and provide accurate data support for the controller.

[0102] For another example, a second flow valve is provided in each of the first pipeline, the second pipeline and the third pipeline, respectively. These flow valves can accurately control the transmission flow of hydrogen in each pipeline, ensuring that the system can be flexibly adjusted according to actual needs.

[0103] The controller calculates the current internal pressure of the hydrogen storage device and the current flow rate of hydrogen in each pipeline in real time based on the data from the pressure sensor and the flow sensor.

[0104] According to the preset intelligent control strategy, the controller dynamically adjusts the opening of each second flow valve to control the transmission and output flow of hydrogen.

[0105] When the hydrogen storage device needs to be charged with hydrogen, the controller opens the second flow valve on the first pipeline, and simultaneously closes or reduces the second flow valves on the second pipeline and the third pipeline to ensure that hydrogen can smoothly enter the hydrogen storage device for storage.

[0106] When the external device or system needs hydrogen, the controller adjusts the opening of the second flow valve on the third branch pipeline according to the actual demand to control the flow of hydrogen released from the hydrogen storage device and output to the outside. At the same time, the opening of the second flow valve on the second branch pipeline can also be adjusted as needed to directly output hydrogen from the hydrogen production device.

[0107] For example, if the hydrogen production capacity of the hydrogen production device is greater than the set value of the hydrogen supply of the second main pipeline at the current moment, the hydrogen flow rate of the second pipeline is equal to the hydrogen supply, and the excess is stored in the hydrogen storage device through the first pipeline.

[0108] If the hydrogen production device produces less hydrogen than the set value of the hydrogen supply of the second main pipeline at the current moment, the hydrogen flow rate of the second branch pipeline is equal to the hydrogen production device, and the difference between the hydrogen supply and the hydrogen production is supplemented by releasing hydrogen from the hydrogen storage tank.

[0109] The disclosed embodiment can, for example, store only part of the produced hydrogen in a hydrogen storage tank, and use the hydrogen storage tank to assist in the supply of hydrogen to the downstream. By adding branch pipes and flow valves, combined with real-time monitoring of flow sensors and the application of intelligent control strategies, the system achieves more precise control of hydrogen transmission and output. This design not only enhances the stability of the system, but also reduces the requirements for hydrogen storage devices and reduces hardware investment.

[0110] Figure 6 The schematic diagram shows an architecture diagram of a hydrogen supply system according to another embodiment of the present disclosure.

[0111] According to the embodiments of the present disclosure, Figure 6 As shown, the hydrogen supply system further includes: an energy storage device 17 for storing green electricity or providing electric energy to the hydrogen production device 2. A power supply sensor 18 for monitoring the rate of change of the electric energy output of the power generation device 1. The controller 4 is also used to control the amount of hydrogen produced by the hydrogen production device 2 according to the rate of change of the electric energy output, and / or control the storage or release of green electricity by the energy storage device 17.

[0112] In some embodiments, energy storage devices and power supply sensors are further integrated to achieve efficient storage and utilization of green electricity, and dynamically adjust the hydrogen production of the hydrogen production device according to the rate of change of the power output of the power generation device. It can also effectively deal with the load instability problem caused by the volatility of green energy (such as wind energy, solar energy, etc.), buffer the load fluctuation of the hydrogen production device, reduce the need for frequent power adjustment of the equipment, and thus extend the service life of the hydrogen production device.

[0113] The energy storage device is used to store excess green electricity or provide electricity to the hydrogen production device when needed. This helps balance the power supply and demand of the system and ensure the stable operation of the hydrogen production process.

[0114] For example, the energy storage device may be a battery energy storage system, such as a lithium-ion battery, a sodium-sulfur battery, a flow battery, etc. These battery systems can efficiently store electrical energy and release it quickly when needed, providing stable power support for the hydrogen production device.

[0115] For another example, the energy storage device may also be a supercapacitor energy storage system. A supercapacitor is an energy storage device with high energy density that can be quickly charged and discharged. It is suitable for occasions that require frequent charging and discharging and rapid response, and can provide instantaneous high-power electrical energy for the hydrogen production device.

[0116] For another example, the energy storage device can also be a pumped storage power station. Although this is not a storage method directly connected to the hydrogen production device, in large-scale power systems, pumped storage power stations are an important means of energy storage. It uses electricity to pump water from low places to high places during off-peak hours, and then releases water to generate electricity during peak hours, thereby balancing the supply and demand of the power system. In the hydrogen energy system, the pumped storage power station can indirectly provide a stable source of electricity for the hydrogen production device.

[0117] In addition, the energy storage device can also be a compressed air energy storage system, a flywheel energy storage system, a hydrogen energy storage system (such as a fuel cell), etc.

[0118] It is understandable that the specific selection of energy storage devices depends on factors such as system size, power demand, cost-effectiveness, and technical feasibility. The controller will intelligently select and manage energy storage devices based on the data from the power supply sensors and the preset control strategy to ensure stable operation and efficient performance of the system.

[0119] The power supply sensor can monitor the power output change rate of the power generation device in real time to provide accurate data support for the controller. The controller dynamically adjusts the hydrogen production of the hydrogen production device and the storage or release of green electricity by the energy storage device based on the data of the power supply sensor and the preset control strategy.

[0120] When the power output of the power generation device is stable, the controller controls the amount of hydrogen produced by the hydrogen production device according to actual demand and ensures that the energy storage device is in an appropriate charging state.

[0121] When the rate of change of the power output of the power generation device is large (such as fluctuations in wind or solar power generation), the controller will quickly adjust the amount of hydrogen produced by the hydrogen production device according to the size and direction of the change rate. For example, when the power output increases, the amount of hydrogen produced can be increased; when the power output decreases, the amount of hydrogen produced can be reduced or the power provided by the energy storage device can be used to maintain the stable operation of the hydrogen production process.

[0122] At the same time, the controller will intelligently decide whether to store excess green electricity in the energy storage device or use it directly in the hydrogen production process based on the current status of the energy storage device (such as the power level) and future power demand forecasts.

[0123] This embodiment integrates the energy storage device and the power supply sensor, and combines the intelligent adjustment strategy of the controller. The system realizes the efficient storage and utilization of green electricity, and dynamically adjusts the hydrogen production of the hydrogen production device according to the change rate of the power output of the power generation device. This design not only improves the flexibility and stability of the system, but also enhances the energy utilization efficiency of the system.

[0124] According to an embodiment of the present disclosure, the power generation device includes, for example, at least one of a photovoltaic power generation device and a wind power generation device.

[0125] In some embodiments, the composition of the power generation device is further clarified, combining photovoltaic power generation devices and wind power generation devices to fully utilize renewable energy and achieve a diversified supply of green electricity.

[0126] The power generation device includes, for example, at least one of a photovoltaic power generation device and a wind power generation device. The photovoltaic power generation device generates electricity using solar energy, while the wind power generation device generates electricity using wind energy. Both of these power generation methods are forms of utilizing renewable energy, which help reduce dependence on traditional energy.

[0127] Photovoltaic power generation devices and wind power generation devices generate electricity separately or simultaneously according to weather conditions and energy demand. The generated green electricity is stored through the power grid or directly transmitted to energy storage devices.

[0128] The controller monitors the power output of the photovoltaic power generation device and the wind power generation device in real time, as well as the power level of the energy storage device. It also intelligently adjusts the hydrogen production of the hydrogen production device according to system requirements and power supply conditions to ensure the stability and reliability of hydrogen supply.

[0129] It is understandable that in addition to photovoltaic power generation devices and wind power generation devices, hydropower generation devices can also be used to generate electricity using the kinetic energy generated by water flows (such as rivers, waterfalls, tides, etc.). Biomass power generation devices use the heat energy generated by the combustion or fermentation of biomass (such as crop waste, wood, urban garbage, etc.) to generate electricity. Geothermal power generation devices, tidal power generation devices, wave power generation devices, solar thermal power generation devices, and temperature difference power generation devices (such as thermocouple power generation) are used to produce green electricity.

[0130] It should be noted that when selecting these green power generation devices, it is necessary to comprehensively consider factors such as energy efficiency, environmental impact, technological maturity, economic cost, and geographical location. At the same time, it is also necessary to make reasonable configuration and scheduling according to the specific needs of the system and energy supply conditions to achieve efficient use of energy and stable operation of the system.

[0131] This embodiment realizes the diversified supply of green electricity by combining photovoltaic power generation devices and wind power generation devices. This design not only improves the stability and reliability of energy supply, but also enhances the flexibility and adaptability of the system.

[0132] According to an embodiment of the present disclosure, a hydrogen supply system is used to supply hydrogen to a chemical synthesis device to synthesize chemical products, wherein the chemical products include at least one of ammonia and alcohol.

[0133] In some embodiments, the hydrogen supply system can be used to supply hydrogen to a chemical synthesis unit to synthesize chemical products such as ammonia and alcohols.

[0134] The electricity generated by wind power and photovoltaic new energy is used to electrolyze water to produce hydrogen, providing raw hydrogen for chemical synthesis equipment. According to the needs of the chemical synthesis equipment, the supply volume and supply pressure of hydrogen are adjusted to ensure a stable supply of hydrogen.

[0135] Since green electricity itself has the problem of power generation volatility, it is easy to cause fluctuations and instability in the hydrogen production at the hydrogen production end, which will cause the concentration of ammonia or methanol produced at the chemical end to be unstable, affecting the balance of ammonia or methanol synthesis and reducing production. At the same time, if the hydrogen production power of the hydrogen production device is frequently adjusted to meet the stability of hydrogen use at the chemical end, it will affect the stable operation and service life of the hydrogen production device. Therefore, the use of a hydrogen storage device as an intermediate buffer can ensure the stability of hydrogen supply while avoiding frequent adjustments to the hydrogen production power of the hydrogen production device, which affects the service life of the hydrogen production device.

[0136] For example, the wind-solar-hydrogen-ammonia-alcohol integrated matching technology can be used to achieve the deep integration and development of new energy power and chemical industry, and promote the local consumption and high value-added transformation of renewable energy. The flexible ammonia synthesis technology can be used to improve the efficiency and stability of ammonia synthesis to reduce energy consumption and costs. And the use of carbon dioxide and hydrogen to synthesize green methanol can realize the recycling of carbon resources.

[0137] The hydrogen supply system of this embodiment can provide a stable and efficient hydrogen supply for chemical synthesis equipment by adjusting the internal pressure of the hydrogen storage tank and the hydrogen supply flow rate, ensuring the smooth synthesis of chemical products such as ammonia and alcohols, realizing the deep integration and development of new energy electricity and chemical industry, and promoting the on-site consumption and high value-added conversion of renewable energy.

[0138] According to an embodiment of the present disclosure, the hydrogen in the hydrogen storage device is in a gaseous state, and the internal pressure of the hydrogen storage device is between 1.6 MPa and 70 MPa.

[0139] For example, in the field of chemical synthesis, especially in the synthesis process of ammonia and alcohol, a stable supply of hydrogen is crucial. In order to meet this demand, the present disclosure proposes a hydrogen supply system. The system can adjust the supply amount and supply pressure of hydrogen according to the actual needs of the chemical synthesis device to ensure a stable and efficient supply of hydrogen.

[0140] This embodiment describes the application of the hydrogen supply system in detail in view of the feature that the internal pressure of the hydrogen storage device is set within a preset range, for example, 1.6 MPa to 70 MPa (such as 1.6 MPa, 5 MPa, 10 MPa, 20 MPa, 50 MPa, 70 MPa, etc.).

[0141] In this embodiment, for example, a high-pressure hydrogen storage device is used to store hydrogen produced by electrolysis of water, and its internal pressure is set within the above preset range to ensure safe and efficient storage of hydrogen. According to the preset range, the hydrogen storage capacity of the device is, for example, 8000kg~25000kg, which meets the needs of large-scale chemical synthesis devices.

[0142] In some embodiments, the hydrogen in the hydrogen storage device may be in liquid or solid state.

[0143] It should be noted that the capacity of the hydrogen storage device disclosed in the present invention is not limited to 25,000 kg, and can be made larger or smaller according to actual needs. However, based on the above-mentioned specific strategy, the capacity of the hydrogen storage device disclosed in the present invention will be smaller than the solution of storing hydrogen in accordance with the conventional method (such as the same hydrogen storage index corresponding to the same flow change value in the process of increasing hydrogen storage and the process of decreasing hydrogen storage with a large corresponding fluctuation frequency).

[0144] According to the actual needs of the chemical synthesis unit, the amount and pressure of hydrogen released from the high-pressure hydrogen storage device are adjusted to ensure a stable supply of hydrogen. At the same time, the concentration, pressure, temperature and other parameters of hydrogen in the hydrogen storage device and hydrogen supply pipeline can be monitored in real time to ensure the safe operation of the system.

[0145] For example, based on the above method, the present disclosure performs modeling calculation based on the wind and solar resources in a certain place, and then verifies the method. Among them, the hydrogen storage capacity of the hydrogen storage device corresponding to P1, P2, P3, and P4 is 25,000 kg, 21,000 kg, 15,000 kg, and 8,000 kg respectively; Q1, Q2, Q3, and Q4 are 21,000 Nm3 / h, 17,000 Nm3 / h, 13,000 Nm3 / h, and 9,000 Nm3 / h respectively; the electrolyzer adjusts the load synchronously with the wind and solar output.

[0146] Figure 7The operating condition curve diagram of the hydrogen supply method according to an embodiment of the present disclosure for three typical consecutive days at a certain location is schematically shown.

[0147] like Figure 7 As shown in the figure, in three typical days, the storage tank was not full for a long time or the hydrogen storage was 0. The hydrogen supply curve is an operating condition, which can be maintained at a certain hydrogen supply for several hours or even days, and the single adjustment fluctuation rate is small to meet the needs of the chemical industry. Therefore, the operation results are in line with expectations, proving the effectiveness of this method.

[0148] The hydrogen supply system in this embodiment realizes a stable and efficient supply of hydrogen by adopting a high-pressure hydrogen storage device and an intelligent monitoring and control system. The internal pressure of the hydrogen storage device is set within a preset range, which not only ensures the storage efficiency of hydrogen, but also ensures the safety of the equipment.

[0149] Figure 8 A flow chart of a hydrogen supply method according to an embodiment of the present disclosure is schematically shown.

[0150] Another aspect of the present disclosure provides a method for supplying hydrogen, such as Figure 8 As shown, for example, operations S810 to S860 are included.

[0151] In operation S810, a hydrogen storage amount of a hydrogen storage device is determined.

[0152] In this operation, for example, a pressure sensor may be used to monitor the internal pressure of the hydrogen storage device in real time.

[0153] For example, a high-precision pressure sensor is installed inside the hydrogen storage device to ensure that the pressure changes inside the hydrogen storage device can be monitored in real time. The data collection frequency of the pressure sensor is set, such as collecting data once per second, to ensure that the details of the pressure changes can be captured.

[0154] The pressure data can be transmitted to the control system in real time through a data communication interface (such as RS485, Ethernet, etc.) for use in subsequent steps. Assuming that the current internal pressure of the hydrogen storage device is 1.5MPa, the pressure sensor transmits this data to the control system in real time.

[0155] In operation S820, the output flow rate of hydrogen is determined according to the relationship between the hydrogen storage capacity of the hydrogen storage device and the hydrogen storage capacity threshold, and there are multiple hydrogen storage capacity thresholds, and the multiple hydrogen storage capacity thresholds correspond to multiple hydrogen output flow rate thresholds respectively.

[0156] In this operation, for example, multiple step change values ​​are preset, which represent different pressure thresholds. Each step change value corresponds to a specific hydrogen output flow value. According to the relationship between the current internal pressure and these step change values, a suitable hydrogen output flow value is selected.

[0157] For example, multiple step change values ​​are preset in the control system, such as 1.0MPa, 1.5MPa, 2.0MPa, etc. Each step change value corresponds to a specific hydrogen output flow value, such as 50m3 corresponding to 1.0MPa, 1.5MPa, and 2.0MPa, respectively. 3 / h、100m 3 / h、150m 3 / h.

[0158] The control system compares the received current internal pressure data with the preset step change value, and selects the hydrogen output flow value corresponding to the step change value that is closest to and not greater than the current internal pressure according to the comparison result.

[0159] In operation S830, a hydrogen generation amount of the hydrogen production apparatus is determined.

[0160] In this operation, for example, the current amount of hydrogen generated may be acquired through a flow sensor.

[0161] For example, a flow sensor or a production monitoring device is installed on the hydrogen production device to monitor the amount of hydrogen produced in real time.

[0162] The monitored hydrogen production data is transmitted to the control system in real time. For example, the current hydrogen production of the hydrogen production device is 80m 3 / h, and the data is transmitted to the control system in real time.

[0163] In operation S840, a hydrogen storage amount change trend of the hydrogen storage device is determined according to the hydrogen generation amount and the hydrogen output flow rate.

[0164] In this operation, for example, by comparing the difference between the current hydrogen generation amount and the output flow rate, the internal pressure change trend of the hydrogen storage device is predicted.

[0165] For example, the control system calculates the difference between the current hydrogen production amount and the current output hydrogen flow rate data according to the received data.

[0166] According to the size and positive and negative of the difference, the internal pressure change trend of the hydrogen storage device (increasing, decreasing or stable) is judged. For example, the current hydrogen production is 80m 3 / h, the current output hydrogen flow rate is 100m 3 / h, so the difference is -20m 3 / h, indicating that the hydrogen storage device is releasing hydrogen and the internal pressure is decreasing.

[0167] In operation S850, when the hydrogen storage amount variation trend is a decrease in hydrogen storage amount and reaches one of a plurality of hydrogen storage amount thresholds, the output flow rate of hydrogen is adjusted to an output flow rate threshold value one level lower than the current output flow rate threshold value.

[0168] In this operation, for example, when the internal pressure change trend is to reduce pressure and reaches one of multiple step change values, the specific hydrogen output flow value is relatively lowered by one level to reduce the output of hydrogen, thereby slowing down the pressure reduction speed or preventing excessive pressure reduction.

[0169] For example, when it is determined that there is a pressure reduction trend and the current internal pressure reaches the preset pressure reduction step change value, the control system automatically adjusts the hydrogen output flow value down by one level. Assuming that the current internal pressure drops from 1.5MPa to 1.0MPa (reaching the preset pressure reduction step change value), the control system adjusts the hydrogen output flow value from 100m 3 / h reduced to 50m 3 / h.

[0170] In operation S860, when the hydrogen storage capacity change trend is an increase in hydrogen storage capacity and reaches a hydrogen storage capacity threshold corresponding to the most recent decrease in hydrogen storage capacity of the hydrogen storage device, the output flow rate of hydrogen is kept unchanged until the hydrogen storage capacity of the hydrogen storage device increases to a relatively higher hydrogen storage capacity threshold, and then the output flow rate of hydrogen is adjusted to an output flow rate threshold that is one level higher than the current output flow rate threshold.

[0171] In this operation, for example, when the internal pressure variation trend is increasing and reaches a specific pressure value corresponding to the most recent pressure reduction, the current output hydrogen flow rate is kept unchanged to maintain pressure stability or allow appropriate pressure increase.

[0172] For example, when it is determined that there is a pressure increase trend and the current internal pressure reaches the specific pressure value corresponding to the most recent pressure reduction, the control system maintains the current output hydrogen flow rate unchanged until the pressure is increased to a relatively higher specific pressure value, and then adjusts the output hydrogen flow rate to a relatively higher specific hydrogen output flow rate value. If the internal pressure starts to rise after falling to less than 1.0MPa, when it reaches 1.0MPa (the specific pressure value corresponding to the most recent pressure reduction), the control system maintains the hydrogen output flow rate at 50m 3 / h unchanged until the internal pressure rises back to 1.5MPa, then increase the hydrogen output flow rate to 100m 3 / h.

[0173] The hydrogen supply method of this embodiment, by introducing a step flow control strategy, achieves precise control of the internal pressure of the hydrogen storage device and dynamic adjustment of the hydrogen output. This method not only improves the stability and efficiency of hydrogen supply, but also enhances the safety of the system. This strategy has broad application prospects in hydrogen energy storage and supply systems, especially in scenarios where stable control of hydrogen supply flow is required.

[0174] The details not included in the method embodiment section are similar to those in the device embodiment section. Please refer to the device embodiment section and will not be repeated here.

[0175] Another aspect of the present disclosure provides a computer-readable storage medium having a computer program stored thereon, characterized in that when the computer program is executed by a processor, the steps of the hydrogen supply method according to the embodiment of the present disclosure are implemented. The computer-readable storage medium may be included in the system described in the above embodiment; or it may exist independently without being assembled into the system. The above computer-readable storage medium carries one or more programs, and when the above one or more programs are executed, the method according to the embodiment of the present disclosure is implemented.

[0176] According to an embodiment of the present disclosure, a computer-readable storage medium may be a non-volatile computer-readable storage medium, for example, may include but is not limited to: a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination thereof. In the present disclosure, a computer-readable storage medium may be any tangible medium containing or storing a program, which may be used by or in combination with an instruction execution system, apparatus, or device.

[0177] It should be understood that the specific order or hierarchy of steps in the disclosed process is an example of an exemplary method. Based on design preferences, it should be understood that the specific order or hierarchy of steps in the process can be rearranged without departing from the scope of protection of the present disclosure. The attached method claims present the elements of the various steps in an exemplary order and are not intended to be limited to a specific order or hierarchy.

[0178] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present disclosure. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or configurations will be omitted when they may cause confusion in the understanding of the present disclosure. In addition, the shapes, sizes, and positional relationships of the components in the drawings do not reflect the actual sizes, proportions, and actual positional relationships.

[0179] In the above detailed description, various features are grouped together in a single embodiment to simplify the disclosure. This method of disclosure should not be interpreted as reflecting an intention that the embodiments of the claimed subject matter require more features than are clearly stated in each claim. On the contrary, as reflected in the attached claims, the disclosure is in a state of having less than all the features of the disclosed individual embodiments. Therefore, the attached claims are hereby expressly incorporated into the detailed description, with each claim standing on its own as a separate preferred embodiment of the disclosure.

[0180] In addition, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present disclosure, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. With respect to the term "comprising" used in the specification or claims, the word is covered in a manner similar to the term "including", as explained in terms of "including," used as a transitional word in the claims. Any term "or" used in the specification of the claims is intended to mean "non-exclusive or".

[0181] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present disclosure. It should be understood that the above description is only a specific embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure should be included in the protection scope of the present disclosure.

Claims

1. A hydrogen supply system, characterized in that: include: A power generation device for providing green electricity; A hydrogen production device, used to use the green electricity to electrolyze water to produce hydrogen, thereby obtaining hydrogen gas; A hydrogen storage device, used to store or release the hydrogen; a controller, configured to control the storage of the hydrogen by the hydrogen storage device, and to control at least one of the hydrogen production device and the hydrogen storage device to output the hydrogen; The output flow rate of the hydrogen is determined based on the hydrogen storage capacity of the hydrogen storage device, and the hydrogen storage capacity of the hydrogen storage device includes at least two hydrogen storage capacity thresholds corresponding to the output flow rate of the hydrogen; During the process of increasing the hydrogen storage capacity of the hydrogen storage device, the first hydrogen storage capacity threshold corresponding to the increase of the hydrogen from the first output flow rate to the second output flow rate is different from the second hydrogen storage capacity threshold corresponding to the decrease of the hydrogen storage capacity of the hydrogen storage device from the second output flow rate to the first output flow rate.

2. The hydrogen supply system according to claim 1, characterized in that: Also includes: A hydrogen storage sensor, used to monitor the hydrogen storage amount of the hydrogen storage device; A flow sensor, used to monitor the output flow of the hydrogen; The processor is connected to the controller, the hydrogen storage sensor and the flow sensor respectively, and is used to determine the output flow of the hydrogen according to the hydrogen storage capacity of the hydrogen storage device and the hydrogen storage threshold, and send it to the controller for execution.

3. The hydrogen supply system according to claim 1 or 2, characterized in that: The output flow rate of hydrogen includes at least two output flow rate thresholds, and the output flow rate thresholds have a corresponding relationship with the hydrogen storage capacity threshold; When the hydrogen storage capacity of the hydrogen storage device decreases and reaches one of the hydrogen storage capacity thresholds, adjusting the output flow rate of the hydrogen to the output flow rate threshold that is one level lower than the output flow rate threshold corresponding to the current hydrogen storage capacity threshold; When the hydrogen storage capacity of the hydrogen storage device increases and reaches the current hydrogen storage capacity threshold value corresponding to the most recent decrease in the hydrogen storage capacity of the hydrogen storage device, the output flow rate of the hydrogen remains unchanged until the hydrogen storage capacity of the hydrogen storage device increases to the hydrogen storage capacity threshold value that is one level higher than the current hydrogen storage capacity threshold value, and then the output flow rate of the hydrogen is adjusted to the output flow rate threshold value that is one level higher than the output flow rate threshold value corresponding to the higher hydrogen storage capacity threshold value.

4. The hydrogen supply system according to claim 1 or 2, characterized in that: The output flow rate of hydrogen includes at least two output flow rate thresholds, each of the output flow rate thresholds corresponds to a group of hydrogen storage capacity thresholds, and a group of hydrogen storage capacity thresholds includes an upper limit of a hydrogen storage capacity threshold and a lower limit of a hydrogen storage capacity threshold; When the hydrogen storage capacity of the hydrogen storage device reaches the upper limit of the hydrogen storage capacity threshold, adjusting the output flow rate of the hydrogen to the output flow rate threshold that is one level higher than the current output flow rate threshold; When the hydrogen storage capacity of the hydrogen storage device reaches the lower limit of the hydrogen storage capacity threshold, the output flow rate of the hydrogen is adjusted to the output flow rate threshold that is one level lower than the current output flow rate threshold.

5. The hydrogen supply system according to any one of claims 1 to 4, characterized in that: The hydrogen production device is connected to the hydrogen storage device through a first pipeline, and the hydrogen storage device outputs the hydrogen through a second pipeline; A first flow valve is disposed in the second pipeline, and the first flow valve is used to control the flow rate of the output hydrogen; The flow sensor is disposed in at least one of the first pipeline and the second pipeline.

6. The hydrogen supply system according to any one of claims 1 to 4, characterized in that: The hydrogen production device is connected to the first branch pipeline and the second branch pipeline respectively through the first main pipeline, the first branch pipeline is connected to the hydrogen storage device, the second branch pipeline is connected to the second main pipeline, the hydrogen storage device is connected to the second main pipeline through the third branch pipeline, and the second main pipeline is used to output the hydrogen; The first pipeline, the second pipeline and the third pipeline are respectively provided with a second flow valve, and the second flow valve is used to control the flow rate of the hydrogen gas; The flow sensor is disposed in at least one of the first main pipeline, the first branch pipeline, the second branch pipeline and the second main pipeline.

7. The hydrogen supply system according to any one of claims 1 to 4, characterized in that: Also includes: An energy storage device, used to store the green electricity or provide electric energy to the hydrogen production device; A power supply sensor for monitoring the rate of change of power output of the power generation device; Wherein, the controller is also used to control the amount of hydrogen produced by the hydrogen production device and / or control the storage or release of the green electricity by the energy storage device according to the rate of change of the electric energy output.

8. The hydrogen supply system according to any one of claims 1 to 4, characterized in that: The hydrogen supply system is used to supply the hydrogen to a chemical synthesis device to synthesize chemical products, wherein the chemical products include at least one of ammonia and alcohol.

9. The hydrogen supply system according to any one of claims 1 to 4, characterized in that: The hydrogen in the hydrogen storage device is in a gaseous state, and the internal pressure of the hydrogen storage device is between 1.6 MPa and 70 MPa.

10. A hydrogen supply method, characterized in that: include: Determine the hydrogen storage capacity of the hydrogen storage device; Determine the output flow rate of hydrogen according to the magnitude relationship between the hydrogen storage capacity of the hydrogen storage device and the hydrogen storage capacity threshold, wherein there are multiple hydrogen storage capacity thresholds, and the multiple hydrogen storage capacity thresholds correspond to multiple hydrogen output flow rate thresholds respectively; Determine the amount of hydrogen produced by the hydrogen production unit; Determining a change trend of the hydrogen storage capacity of the hydrogen storage device according to the hydrogen generation amount and the output flow rate of the hydrogen; When the hydrogen storage amount change trend is a decrease in hydrogen storage amount and reaches one of the multiple hydrogen storage amount thresholds, adjusting the output flow rate of hydrogen to the output flow rate threshold that is one level lower than the current output flow rate threshold; When the hydrogen storage capacity change trend is an increase in hydrogen storage capacity, and reaches the hydrogen storage capacity threshold corresponding to the most recent decrease in hydrogen storage capacity of the hydrogen storage device, the output flow rate of the hydrogen is kept unchanged until the hydrogen storage capacity of the hydrogen storage device increases to a relatively higher level of the hydrogen storage capacity threshold, and then the output flow rate of the hydrogen is adjusted to the output flow rate threshold that is one level higher than the current output flow rate threshold.

11. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the hydrogen supply method according to claim 10 are implemented.

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