A method, apparatus and storage medium for hydrogen storage and transportation in a hydrogen production system.

Abstract

This disclosure relates to a hydrogen storage and transportation method, apparatus, and storage medium for a hydrogen production system, relating to the fields of hydrogen production, hydrogen storage, and pipeline hydrogen transportation. The method includes: obtaining attribute parameters of a hydrogen production unit and a hydrogen storage unit; constructing judgment conditions based on the annual unit-time fluctuation of hydrogen production from the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit; dividing the annual unit-time fluctuation of hydrogen production from the hydrogen production unit into several time periods using the judgment conditions, so that the hydrogen fluctuation of each time period can be stably output according to the average hydrogen production of that time period; and using the average hydrogen production of the several time periods as the input from the hydrogen storage unit to the beginning of the long-distance pipeline unit within each time period. Through the content of this application, the hydrogen buffering capacity of the hydrogen production end storage tank and the hydrogen storage capacity of the long-distance pipeline unit itself can be considered, improving the stability of hydrogen output and reducing the volume requirements of the storage tank configuration and engineering costs.

Description

Technical Field

[0001] This disclosure relates to the fields of hydrogen production, storage and transportation technology, and particularly to a hydrogen storage and transportation method, apparatus and storage medium for a hydrogen production system. Background Technology

[0002] Hydrogen energy, with its multiple attributes of being a carrier of renewable energy and a high-quality raw material and fuel that is zero-carbon and pollution-free, can play an important role in the transformation of energy supply and consumption.

[0003] Current technologies typically employ wind and solar power systems for hydrogen electrolysis, with storage tanks used to buffer the hydrogen. However, wind-solar co-generation for hydrogen electrolysis is a complex systems engineering project, involving numerous challenges such as the complementarity of wind and solar power output, the capacity ratio of wind and solar combined electrolysis for hydrogen production, and the coupled regulation and control of power generation, hydrogen production, energy storage, and hydrogen storage. Numerous scholars, research institutions, and enterprises both domestically and internationally have conducted extensive research on this topic, achieving significant results in areas such as safety, efficiency, wide-range adaptability, and reliability of wind-solar co-generation for hydrogen electrolysis. Even so, due to the inherent characteristics of this production model, fluctuations in hydrogen production under the constraint of low-cost targets are unavoidable in the short term, leading to unstable hydrogen supply to end-users. When unstable hydrogen production is directly fed into pipelines, it causes significant fluctuations in the hydrogen flow rate at the pipeline's origin, necessitating the deployment of large-volume hydrogen storage tanks at the hydrogen production site. This large-scale centralized deployment of hydrogen storage tanks not only brings higher safety risks but also increases land and equipment investment, raising operating costs. Summary of the Invention

[0004] This disclosure provides a hydrogen storage and transportation method, apparatus, and storage medium for a hydrogen production system, which can take into account both the hydrogen buffering capacity of the hydrogen production end storage tank and the hydrogen storage capacity of the long-distance pipeline unit itself, improve the stability of hydrogen output, and reduce the volume requirements of storage tank configuration and engineering costs.

[0005] In a first aspect, this disclosure provides a method for storing and transporting hydrogen in a hydrogen production system, wherein the hydrogen production system includes a hydrogen production unit, a hydrogen storage unit, and a long-distance pipeline unit connected in sequence; the method for storing and transporting hydrogen includes:

[0006] Obtain the attribute parameters of the hydrogen production unit and the hydrogen storage unit; the attribute parameters include the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit.

[0007] Based on the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit, a judgment condition is constructed to determine whether the hydrogen production of the hydrogen production unit at any time period can be stably output from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of that time period.

[0008] The hydrogen production unit’s annual unit time fluctuation output is divided into several time periods by using judgment conditions, so that the hydrogen fluctuation output of each time period can be stably output according to the average hydrogen output of that time period.

[0009] The average hydrogen production over several time periods is used as the input amount from the hydrogen storage unit to the beginning of the long-distance pipeline unit during each time period.

[0010] In some embodiments, the determination criteria for constructing a system based on the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit to determine whether the hydrogen production of the hydrogen production unit at any given time period can be stably output from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of that time period includes:

[0011] Based on the supply and demand balance principle of hydrogen filling and releasing in storage tanks, a matching relationship is established between the allowable hydrogen storage volume and the fluctuating hydrogen flow rate at the beginning of the long-distance pipeline unit.

[0012] Based on the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the matching relationship, the average hydrogen production matched with the hydrogen storage volume in any time period is determined; the average hydrogen production is used as the hydrogen fluctuation output at the beginning of the long-distance pipeline unit in any time period.

[0013] The condition that the hydrogen storage volume matching the average hydrogen production in any time period is less than the maximum hydrogen storage capacity of the hydrogen storage unit is established as a criterion for stably outputting hydrogen from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production in that time period.

[0014] In some embodiments, the step of dividing the annual hydrogen production unit's unit-time fluctuation output into several time periods using determination conditions, so that the hydrogen production fluctuation output in each time period can be stably output according to the average hydrogen production output of that time period, includes:

[0015] The annual hydrogen production of the hydrogen production unit is accumulated starting from the first unit time, and the average hydrogen production within the accumulated time period is calculated simultaneously until the average hydrogen production within the accumulated time period does not meet the judgment criteria.

[0016] Pick up the time period that meets the judgment condition before the cumulative calculation stops, as well as the hydrogen fluctuation output and average hydrogen output per unit time within that time period.

[0017] Starting from the next unit time after picking the time period that meets the judgment condition, repeat the above steps until all the hydrogen unit time fluctuations throughout the year are traversed, resulting in hydrogen fluctuations for several time periods.

[0018] In some embodiments, the step of accumulating the annual hydrogen production of the hydrogen production unit starting from the first unit time and simultaneously calculating the average hydrogen production over the accumulated time period until the average hydrogen production over the accumulated time period does not meet the determination criteria includes:

[0019] The annual hydrogen production of the hydrogen production unit is calculated by summing up the hydrogen production over the first unit of time to determine the sum of the fluctuating hydrogen production over the summing period.

[0020] The average hydrogen production for a given period is calculated by summing the fluctuating hydrogen production over the cumulative time period.

[0021] Determine whether the average hydrogen production during this period meets the judgment criteria;

[0022] If the conditions are met, the cumulative calculation of fluctuating hydrogen production will continue, and the cumulative time period and the average hydrogen production during that time period will be updated.

[0023] If the condition is not met, the cumulative calculation will stop.

[0024] In some embodiments, obtaining the attribute parameters of the hydrogen production unit and the hydrogen storage unit includes:

[0025] Obtain the annual hydrogen production per unit time fluctuation of the hydrogen production unit, as well as the number of hydrogen storage tanks and their attribute parameters for the hydrogen storage unit.

[0026] The maximum hydrogen storage volume that the hydrogen storage unit can provide is determined based on the number of hydrogen storage spheres and the attribute parameters of the hydrogen storage spheres.

[0027] In some embodiments, it also includes:

[0028] Obtain the attribute parameters of the long-distance pipeline unit;

[0029] Based on the property parameters of the long-distance pipeline unit and the compressibility of hydrogen, the hydrogen transmission pressure within the long-distance pipeline unit is determined to ensure stable output at the outlet of the long-distance pipeline unit.

[0030] Secondly, this disclosure provides a hydrogen production system, including a hydrogen production unit, a hydrogen storage unit, a long-distance pipeline unit, and a control unit; the hydrogen production unit, the hydrogen storage unit, and the long-distance pipeline unit are connected in sequence and are all connected to the control unit; the control unit is used to execute the hydrogen storage and transportation method described above.

[0031] In some embodiments, the system further includes a power generation unit connected to the hydrogen production unit and an energy storage unit connected to the power generation unit; the power generation unit includes any one or both of a wind power generation unit and a photovoltaic power generation unit; the energy storage unit is adapted to the wide power capacity of the hydrogen production unit.

[0032] Thirdly, this disclosure provides a computer device including a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the foregoing aspects.

[0033] Fourthly, this disclosure provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in the above aspects.

[0034] Fifthly, this disclosure provides a computer program product, including a computer program / instructions that, when executed by a processor, implement the steps of the methods described in the foregoing aspects.

[0035] The present disclosure provides a hydrogen storage and transportation method, apparatus and storage medium for a hydrogen production system. By using a hydrogen storage unit as the starting point for transportation to a long-distance pipeline unit, hydrogen can be stored by combining the hydrogen storage unit and the long-distance pipeline. This takes into account both the hydrogen buffering capacity of the hydrogen storage unit and the hydrogen storage capacity of the long-distance pipeline unit itself, thereby reducing the volume requirements of the hydrogen storage unit for the hydrogen production system and reducing the engineering investment cost.

[0036] By dividing the fluctuating hydrogen production of the hydrogen production unit throughout the year into several time periods that meet certain criteria, the hydrogen supplied to the inlet of the long-distance pipeline unit can be delivered with small amplitude and low frequency fluctuations. This reduces the volume requirements of the hydrogen storage unit, allowing the fluctuating hydrogen production output to be delivered relatively stably within the long-distance pipeline unit, thereby improving the operational stability of the long-distance pipeline. Based on the compressibility of hydrogen, pressure regulation is used to control the stable output at the outlet of the long-distance pipeline, improving the stability of hydrogen use at the outlet and reducing the safety risks and investment costs of large-scale hydrogen storage tank configuration in the hydrogen storage unit. Attached Figure Description

[0037] The present disclosure will be described in more detail below based on embodiments and with reference to the accompanying drawings:

[0038] Figure 1 A schematic flowchart of a hydrogen storage and transportation method for a hydrogen production system provided in this embodiment of the present disclosure;

[0039] Figure 2 This is a schematic diagram showing the connection relationship of each unit in the hydrogen production system provided in an embodiment of the present disclosure;

[0040] Figure 3 The embodiments of this disclosure correspond to Figure 1 An exemplary flowchart of step S1;

[0041] Figure 4 The embodiments of this disclosure correspond to Figure 3 An exemplary flowchart of step S2;

[0042] Figure 5 This is a line diagram illustrating the supply and demand balance principle of hydrogen filling and releasing in the storage tank and the matching relationship between the volume of the hydrogen storage unit and the gas transmission capacity of the long-distance pipeline unit, as used in the embodiments of this disclosure.

[0043] Figure 6 The embodiments of this disclosure correspond to Figure 1 An exemplary flowchart of step S3;

[0044] Figure 7 The embodiments of this disclosure correspond to Figure 5 An exemplary flowchart of step S31;

[0045] Figure 8 This is a schematic diagram comparing the fluctuations in hydrogen transport volume at different times at the beginning of a long-distance pipeline unit with 10 hydrogen storage spheres at the original stage of this embodiment without hydrogen storage spheres and with the hydrogen storage and transport method of this embodiment.

[0046] Figure 9 This is an exemplary structural diagram of a hydrogen production system in an embodiment of this disclosure;

[0047] Figure 10 This is a schematic block diagram of a computer device provided in an embodiment of this disclosure;

[0048] Figure 11 This is a schematic diagram of a readable storage medium provided in an embodiment of this disclosure.

[0049] In the accompanying drawings, the same parts are referred to by the same reference numerals, and the drawings are not drawn to scale.

[0050] In the diagram: 1. Wind power generation unit; 2. Photovoltaic power generation unit; 3. Power storage unit; 4. Electrolysis hydrogen production unit; 5. Hydrogen storage unit; 6. Long-distance pipeline unit; 7. Control unit. Detailed Implementation

[0051] To enable those skilled in the art to better understand the technical solutions of this disclosure, and to fully understand and implement the process of how this disclosure applies technical means to solve technical problems and achieve corresponding technical effects, the technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, not all embodiments. The embodiments of this disclosure and the various features within them can be combined with each other without conflict, and the resulting technical solutions are all within the protection scope of this disclosure. All other embodiments obtained by those skilled in the art based on the embodiments of this disclosure without creative effort should fall within the protection scope of this disclosure.

[0052] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this disclosure described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0053] It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions, and although a logical order is shown in the flowchart, in some cases the steps shown or described may be executed in a different order than that shown here.

[0054] In the current wind-solar co-generation electrolysis hydrogen production model, the common approach is to use high-pressure gaseous hydrogen storage tanks for filling and releasing the fluctuating hydrogen produced. When the electrolysis hydrogen production exceeds the demand, the excess hydrogen is buffered in the storage tanks. When the production is less than the demand, the buffered hydrogen can be released from the tanks to replenish the supply. When the installed capacity of wind and solar power generation and the scale of hydrogen production are relatively small, the demand for storage tank volume is not significant, and the constraints on construction investment and safety risks are not particularly pronounced. However, large-scale co-generation of hydrogen from wind and solar power bases is the mainstream of my country's current and future hydrogen industry chain development. Hydrogen production demand is in the tens of thousands, hundreds of thousands, or even millions of tons, creating a strong demand for hydrogen storage capacity due to the large-scale and unstable production of hydrogen. For example, the Sinopec Xinjiang Kuqa photovoltaic power generation green hydrogen demonstration project, which has already been put into operation, has a hydrogen storage capacity of 210,000 standard cubic meters with an annual hydrogen production capacity of 20,000 tons, requiring 10 2,000 m³ storage tanks. 3 Water storage tanks. The Alashan Ulan Buh 3.5 MW integrated wind-solar-hydrogen desertification control and aviation fuel production demonstration project, as publicly reported, has a planned hydrogen storage capacity of 780,000 standard cubic meters. The centralized arrangement of numerous hydrogen storage tanks in a large-scale hydrogen production base presents multiple challenges, including safety risks, land investment, and equipment investment, which indirectly restricts the commercial development of the wind-solar-hydrogen production industry chain.

[0055] This disclosure provides a hydrogen storage and transportation method for a hydrogen production system, promoting the relatively stable pipeline transportation of hydrogen produced by wind, solar, or wind-solar co-generation, which exhibits fluctuations in output. It offers a "hydrogen production tank + pipeline hydrogen storage" mode. This mode balances the hydrogen buffering capacity of the hydrogen production tank with the hydrogen storage capacity of the long-distance hydrogen pipeline itself. By utilizing the supply-demand balance principle of hydrogen filling and releasing in the tank, it establishes a matching relationship between the allowable tank capacity of the hydrogen production tank and the orderly fluctuations in hydrogen output entering the pipeline, forming a method for optimizing tank configuration calculations. This storage and transportation mode, while occupying a small amount of tank capacity, smooths out the random, disordered, large-amplitude, and high-frequency fluctuations in hydrogen production at large-scale wind and solar power generation, adjusting them to small-amplitude and low-frequency fluctuations at the inlet of the long-distance hydrogen pipeline. Based on the compressibility of hydrogen, it fully utilizes the hydrogen storage capacity of the long-distance hydrogen pipeline, and through pressure regulation control, ultimately achieves a stable output at the outlet of the long-distance hydrogen pipeline. This model reduces the safety risks associated with configuring large-capacity storage tanks at the hydrogen production end, while also lowering overall engineering investment, thereby further reducing the end-use cost of hydrogen and promoting the commercial development of the hydrogen energy production, storage, transportation and utilization industry chain.

[0056] Example 1

[0057] Figure 1 This is a schematic flowchart illustrating a hydrogen storage and transportation method for a hydrogen production system provided in an embodiment of this disclosure. Figure 1 and Figure 2 As shown, a hydrogen storage and transportation method for a hydrogen production system is disclosed. The hydrogen production system includes a hydrogen production unit, a hydrogen storage unit, and a long-distance pipeline unit connected in sequence. The hydrogen storage and transportation method includes: acquiring attribute parameters of the hydrogen production unit and the hydrogen storage unit; the attribute parameters include the annual hydrogen unit-time fluctuation output of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit; constructing a judgment condition based on the annual hydrogen unit-time fluctuation output of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit to determine whether the hydrogen output of the hydrogen production unit at any time period can be stably output from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen output of that time period; dividing the annual hydrogen unit-time fluctuation output of the hydrogen production unit into several time periods using the judgment condition, so that the hydrogen fluctuation output of each time period can be stably output at the average hydrogen output of that time period; and using the average hydrogen output of the several time periods as the input amount from the hydrogen storage unit to the beginning of the long-distance pipeline unit in each time period for transportation. By balancing the hydrogen buffering capacity of the hydrogen storage unit with the hydrogen storage capacity of the long-distance pipeline unit itself, the volume requirements of the hydrogen production system on the hydrogen storage unit are reduced. The inlet end of the long-distance pipeline unit achieves small-amplitude and low-frequency fluctuations in output over several long periods, thereby improving the stability of hydrogen transportation in the long-distance pipeline and reducing the safety risks and engineering investment costs of large-scale hydrogen storage tank configuration in the hydrogen storage unit.

[0058] The hydrogen storage and transportation method of the hydrogen production system provided in this embodiment can be implemented in the form of software, hardware, firmware or any combination thereof. It can be loaded and executed by a processor in a device such as a mobile phone, tablet computer, laptop computer, desktop computer, or network server, thereby achieving stable hydrogen transportation, reducing the tank volume requirement of the hydrogen storage unit, reducing configuration safety risks and engineering investment costs.

[0059] In this embodiment, the power generation unit includes any one or both of wind power generation unit 1 and photovoltaic power generation unit 2, depending on the actual resource conditions of the project. In a specific embodiment, such as Figure 2 As shown, the power generation unit adopts a synergistic and complementary approach between wind power generation unit 1 and photovoltaic power generation unit 2 to generate electricity, achieving continuous output of low-fluctuation power with high utilization rate. Power storage unit 3 is configured to further smooth the power output. Wind power generation unit 1, photovoltaic power generation unit 2 and power storage unit 3 work together to adapt to the wide power capacity of electrolysis hydrogen production unit 4, thereby reducing the high-frequency and large-amplitude fluctuation output of hydrogen produced by the hydrogen production unit. Thus, the volume requirements of the hydrogen storage unit are reduced as much as possible from the source.

[0060] The following is for reference. Figure 1 and Figure 2 The hydrogen storage and transportation method of the hydrogen production system provided in this disclosure embodiment is described below. The hydrogen storage and transportation method of the hydrogen production system includes steps S1 to S4, as detailed below:

[0061] S1. Obtain the attribute parameters of the hydrogen production unit and the hydrogen storage unit; the attribute parameters include the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit.

[0062] In some embodiments, such as Figure 3 As shown, the attribute parameters of the hydrogen production unit and the hydrogen storage unit are obtained, including:

[0063] S11. Obtain the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the number and attribute parameters of the hydrogen storage tanks of the hydrogen storage unit.

[0064] S12. Determine the maximum hydrogen storage volume that the hydrogen storage unit can provide based on the number of hydrogen storage spherical tanks and the attribute parameters of the hydrogen storage spherical tanks.

[0065] Furthermore, the annual hydrogen production unit's unit-time fluctuation output is the hydrogen production unit's unit-time fluctuation output generated by electrolysis of electricity generated by the power generation unit, where unit time is typically measured in hours.

[0066] The attribute parameters of hydrogen storage unit 5 are determined based on constraints such as the manufacturing capacity of hydrogen storage spherical tanks, working conditions, construction investment, and safety risks. Specifically, they represent the number of hydrogen storage spherical tanks and the volume of the hydrogen storage spherical tanks that the project can allow, thereby determining the maximum hydrogen storage volume that the hydrogen storage unit of the project can provide.

[0067] In this embodiment, after the hydrogen production unit 4 produces hydrogen, it is transported to the hydrogen storage unit 5 for buffering and storage, and then transported to the long-distance pipeline unit 6 through the hydrogen storage unit 5. This takes into account both the hydrogen buffering capacity of the hydrogen storage unit 5 and the hydrogen storage capacity of the long-distance pipeline unit 6 itself, realizing the "hydrogen production end storage tank + pipeline hydrogen storage" storage and transportation mode. This can reduce the requirements of the project on the attribute parameters of the hydrogen storage unit, reduce the volume requirements of the hydrogen storage unit, and reduce investment costs and safety risks.

[0068] S2. Based on the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit, construct the judgment conditions for determining whether the hydrogen production of the hydrogen production unit at any time period can be stably output from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of that time period.

[0069] In some embodiments, step S2, such as Figure 4 As shown, it includes:

[0070] S21. Based on the supply and demand balance principle of hydrogen filling and releasing in storage tanks, construct a matching relationship between the allowable hydrogen storage volume and the fluctuating hydrogen flow at the beginning of the long-distance pipeline unit.

[0071] S22. Based on the annual hydrogen unit time fluctuation output of the hydrogen production unit and the matching relationship, determine the average hydrogen output matched with the hydrogen storage volume in any time period; the average hydrogen output is used as the hydrogen fluctuation output at the beginning of the long-distance pipeline unit in any time period.

[0072] S23. The hydrogen storage volume that matches the average hydrogen production in any time period is less than the maximum hydrogen storage capacity of the hydrogen storage unit is constructed as a judgment condition that the hydrogen can be stably output from the hydrogen storage unit to the long-distance pipeline unit with the average hydrogen production in that time period.

[0073] Furthermore, the supply and demand balance principle for hydrogen filling and discharging in the storage tank is as follows: when the gas transmission volume through the long-distance pipeline is less than the gas supply volume, the excess hydrogen is stored to compensate for the shortfall when the transmission volume exceeds the supply volume; the time when the pipeline transmission volume is lower than the average hourly gas supply volume is the cycle of gas entering the storage tank, and vice versa. Therefore, the theoretical volume of the hydrogen storage unit is the difference between the highest and lowest values ​​of the hydrogen storage unit's operating curve. The supply and demand balance principle for hydrogen filling and discharging in the storage tank is as follows: Figure 5As shown, when the gas transmission rate change curve is low, the hydrogen storage unit's operating curve rises; when the gas transmission rate change curve is high, the hydrogen storage unit's operating curve falls. Therefore, based on the relationship between the hydrogen storage unit's operating curve and the gas transmission rate change curve of the long-distance pipeline unit, the following can be determined: Figure 5 The time period shown represents the matching relationship between the allowable hydrogen storage volume and the stable hydrogen flow rate at the beginning of the long-distance pipeline unit.

[0074] Based on the above principles, in this embodiment, the average hydrogen production of any time period within the annual hydrogen fluctuation output of the hydrogen production unit is used as the input amount of hydrogen supplied from the hydrogen storage unit to the long-distance pipeline unit. Therefore, the matching relationship between the annual hydrogen unit time fluctuation output, hydrogen storage volume, and the amount of hydrogen fluctuation at the beginning of the long-distance pipeline unit can be used to determine the hydrogen storage volume matched with the average hydrogen production in any time period. Then, the hydrogen storage volume matched with the average hydrogen production is compared with the actual maximum hydrogen storage volume of the hydrogen storage unit in the project to determine whether the average hydrogen production in the current time period can be stably supplied. This establishes the judgment condition, which is beneficial for dividing the annual hydrogen production of the hydrogen production unit into several time periods, thereby ensuring that the hydrogen supplied by the long-distance pipeline unit is a small-amplitude, low-frequency fluctuation output, which is conducive to the stable output of hydrogen.

[0075] S3. Using the judgment conditions, the annual hydrogen production unit's unit time fluctuation output is divided into several time periods, so that the hydrogen fluctuation output of each time period can be stably output according to the average hydrogen output of that time period.

[0076] In some embodiments, step S3, such as Figure 6 As shown, it includes:

[0077] S31. The annual hydrogen production of the hydrogen production unit is accumulated starting from the first unit time, and the average hydrogen production within the accumulated time period is calculated simultaneously until the average hydrogen production within the accumulated time period does not meet the judgment criteria.

[0078] In some embodiments, step S31, such as Figure 7 As shown, it includes:

[0079] S311. The annual hydrogen production of the hydrogen production unit is accumulated starting from the first unit time, and the sum of the fluctuating hydrogen production during the accumulated time period is determined.

[0080] S312. Calculate the average hydrogen production for the period based on the sum of the fluctuating hydrogen production over the cumulative time period.

[0081] S313. Determine whether the average hydrogen production during this period meets the judgment criteria.

[0082] If the conditions are met, the cumulative calculation of fluctuating hydrogen production will continue, and the cumulative time period and the average hydrogen production during that time period will be updated.

[0083] If the condition is not met, the cumulative calculation will stop.

[0084] The process of determining whether the average hydrogen production during a given period meets the criteria is as follows: The average hydrogen production is input into the criteria to determine the corresponding hydrogen storage volume. Then, the maximum volume requirement of the project's hydrogen storage unit is compared with the corresponding average hydrogen production volume. If the maximum volume requirement is greater than or equal to the corresponding average hydrogen production volume, the average hydrogen production during that period is considered to meet the criteria, meaning it can be stably output. If it is less, it is considered not to meet the criteria, and the cumulative calculation stops. This method combines the fluctuating hydrogen production from the hydrogen production unit with the buffering and storage function of the hydrogen storage unit, using the average hydrogen production during that period as the amount of hydrogen supplied from the storage unit to the long-distance pipeline unit. This ensures a relatively stable input at the pipeline's starting point, reduces the volume requirement of the hydrogen storage unit, and lowers construction investment and safety risks.

[0085] S32. Pick up the time period that meets the judgment condition before the cumulative calculation stops, and the hydrogen fluctuation output and average hydrogen output per unit time within that time period.

[0086] S33. Starting from the next unit time of the time period that meets the judgment condition, repeat the above steps until the hydrogen production unit has traversed all the hydrogen unit time fluctuations throughout the year, and obtain the hydrogen fluctuations of several time periods.

[0087] By iterating through all the fluctuating hydrogen production per unit time throughout the year in step S3, the fluctuating hydrogen production for several time periods is obtained. This allows the original fluctuating hydrogen production of the hydrogen production unit to be divided into average fluctuating production over multiple time periods. This enables the output to the pipeline input of the long-distance pipeline unit to be divided into several long periods of small-amplitude fluctuations. Stable output is achieved within the divided time periods, and small fluctuations are formed when entering the next time period. This is beneficial for the stable output and storage of hydrogen by the long-distance pipeline unit, improving the stability of hydrogen transportation and reducing the volume requirements of the hydrogen storage unit.

[0088] S4. The average hydrogen production over several time periods is used as the input amount from the hydrogen storage unit to the beginning of the long-distance pipeline unit during each time period.

[0089] In some embodiments, the hydrogen storage unit in this embodiment is configured with ten hydrogen storage units. Taking the fluctuating hydrogen production output of the hydrogen production unit over 140 hours as an example, such as... Figure 8As shown, the solid line represents the fluctuation of hydrogen production at the beginning of the long-distance pipeline unit when the hydrogen production unit is directly connected to the long-distance pipeline unit. Alternatively, the solid line can be represented as the fluctuation of hydrogen production output from the hydrogen production unit to the beginning of the hydrogen storage unit after the hydrogen production unit is connected to the long-distance pipeline unit via the hydrogen storage unit. The dashed line represents the fluctuation of hydrogen production at the beginning of the long-distance pipeline unit when the average hydrogen production over multiple time periods is used as the input from the hydrogen storage unit to the beginning of the long-distance pipeline unit under the maximum allowable hydrogen storage volume of ten hydrogen storage tanks, using the method provided in this embodiment. It can be clearly seen that when ten storage tanks are used to configure the hydrogen storage unit and the hydrogen storage and transportation of the hydrogen storage unit is controlled by the method provided in this embodiment, the hydrogen input of the long-distance pipeline unit remains stable within the divided time periods. After a small fluctuation when entering the next time period, the output remains stable in the next time period. This is beneficial for the stable output and storage of hydrogen by the long-distance pipeline unit, improving the stability of hydrogen transportation and reducing the volume requirements of the hydrogen storage unit.

[0090] In some embodiments, the hydrogen storage and transportation method further includes: obtaining attribute parameters of the long-distance pipeline unit;

[0091] Based on the property parameters of the long-distance pipeline unit and the compressibility of hydrogen, the hydrogen transmission pressure within the long-distance pipeline unit is determined to ensure stable output at the outlet of the long-distance pipeline unit.

[0092] By leveraging the compressibility of hydrogen and fully utilizing the hydrogen storage capacity of long-distance hydrogen pipelines, pressure regulation and control of the long-distance pipeline units can be achieved, ultimately resulting in a stable output at the outlet of the long-distance hydrogen pipeline.

[0093] The embodiments of this disclosure provide a hydrogen storage and transportation method for a hydrogen production system. By employing a hydrogen storage unit as the starting point for delivery to a long-distance pipeline unit, hydrogen can be stored in combination through the hydrogen storage unit and the long-distance pipeline. This balances the hydrogen buffering capacity of the storage unit and the hydrogen storage capacity of the pipeline unit itself, thereby reducing the volume requirements of the storage unit and lowering engineering investment costs. By dividing the fluctuating annual hydrogen production of the hydrogen production unit into several time periods that meet certain criteria, the hydrogen delivered to the inlet of the long-distance pipeline unit can be delivered with small amplitude and low frequency fluctuations. This allows the fluctuating hydrogen production from the hydrogen production unit to be transported smoothly within the pipeline unit, improving the stability of hydrogen delivery through the long-distance pipeline. Furthermore, based on the compressibility of hydrogen, pressure regulation is used to control the stable output at the outlet of the long-distance pipeline, improving the stability of hydrogen use at the outlet. Through the above scheme, stable hydrogen delivery is achieved, while reducing the required storage tank volume of the hydrogen storage unit, lowering configuration safety risks, and reducing engineering investment costs.

[0094] Example 2

[0095] Based on the above embodiments, this embodiment provides an application example.

[0096] This embodiment provides a hydrogen production system, such as Figure 9 As shown, it includes: a hydrogen production unit 4, a hydrogen storage unit 5, a long-distance pipeline unit 6, and a control unit 7; the hydrogen production unit 4, the hydrogen storage unit 5, and the long-distance pipeline unit 6 are connected in sequence and connected to the control unit 7; the control unit 7 is used to execute the steps of the method described in the above embodiments.

[0097] Furthermore, such as Figure 2 As shown, the hydrogen production system also includes a power generation unit connected to the hydrogen production unit 4 and an energy storage unit 3 connected to the power generation unit; the power generation unit includes any one or both of wind power generation unit 1 and photovoltaic power generation unit 2; the wind power generation unit 1, photovoltaic power generation unit 2, and energy storage unit 3 work together to adapt to the wide power capacity of the hydrogen production unit 4. Specifically, as... Figure 2 As shown, the power generation unit adopts a synergistic and complementary approach between wind power generation unit 1 and photovoltaic power generation unit 2 to generate electricity, achieving continuous output of low-fluctuation power with high utilization rate. Power storage unit 3 is configured to further smooth the power output. Wind power generation unit 1, photovoltaic power generation unit 2 and power storage unit 3 work together to adapt to the wide power capacity of electrolysis hydrogen production unit 4, thereby reducing the high-frequency and large-amplitude fluctuation output of hydrogen produced by hydrogen production unit 4. Thus, the volume requirement of hydrogen storage unit 5 is reduced as much as possible from the source.

[0098] In this embodiment, the control unit can be implemented in the form of software, hardware, firmware, or any combination thereof, and is loaded and executed by a processor in a device such as a mobile phone, tablet computer, laptop computer, desktop computer, or network server. In this embodiment, the control unit is applied to control the storage and transportation process in a hydrogen production system, thereby achieving stable hydrogen delivery, reducing the tank volume requirements of the hydrogen storage unit, and reducing configuration safety risks and engineering investment costs.

[0099] Example 3

[0100] Based on the above embodiments, this embodiment provides a computer device, such as... Figure 10 As shown, it includes a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the steps of the method described in the above embodiments.

[0101] In some embodiments of this example, a computer-readable storage medium is provided, such as... Figure 11 As shown, a computer program is stored thereon, which, when executed by a processor, implements the steps of the method described in the above embodiments.

[0102] In some embodiments of this example, a computer program product is provided, including a computer program / instructions, which, when executed by a processor, implements the steps of the method described in the above embodiments.

[0103] The processor may include, but is not limited to, one or more processors or microprocessors. Each processor may be implemented as an Application Specific Integrated Circuit (ASIC), Digital Signal Processor (DSP), Digital Signal Processing Device (DSPD), Programmable Logic Device (PLD), Field Programmable Gate Array (FPGA), controller, microcontroller, microprocessor, or other electronic component, for executing the methods described in the above embodiments.

[0104] Computer-readable storage media can be implemented by any type of volatile or non-volatile storage device or a combination thereof. Computer-readable storage media may include, but are not limited to, random access memory (RAM), read-only memory (ROM), flash memory, EPROM memory, EEPROM memory, registers, and computer storage media (e.g., hard disks, floppy disks, solid-state drives, removable disks, CD-ROMs, DVD-ROMs, Blu-ray discs, etc.).

[0105] Computer-readable storage media may also store at least one computer-executable program / instruction, such as computer-readable instructions. Computer-readable storage media include, but are not limited to, volatile memory and / or non-volatile memory. Volatile memory may include, for example, random access memory (RAM) and / or cache memory. Computer-readable storage media may include, for example, read-only memory (ROM), hard disk, flash memory, etc. For example, a non-transitory computer-readable storage medium may be connected to a computing device such as a computer, and then, when the computing device executes the computer-readable instructions stored on the computer-readable storage medium, the various methods described above can be performed.

[0106] In addition, the computer device may include (but is not limited to) a data bus, an input / output (I / O) bus, a display, and input / output devices (e.g., keyboard, mouse, speakers, etc.).

[0107] The processor can communicate with external devices via the I / O bus through wired or wireless networks.

[0108] In one embodiment, the at least one computer-executable instruction may also be compiled into or comprise a software product / computer program product, wherein one or more computer-executable instructions are executed by a processor to perform the steps of the various functions and / or methods in the embodiments described herein.

[0109] In the embodiments provided in this disclosure, it should be understood that the disclosed apparatus and methods can also be implemented in other ways. The apparatus embodiments described above are merely illustrative; for example, the flowcharts and block diagrams in the accompanying drawings illustrate the architecture, functionality, and operation of possible implementations of apparatus, methods, and computer program products according to various embodiments of this disclosure. In this regard, each block in a flowchart or block diagram may represent a module, segment, or portion of code containing one or more executable instructions for implementing a specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than those marked in the drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in reverse order, depending on the functions involved. It should also be noted that each block in a block diagram and / or flowchart, and combinations of blocks in block diagrams and / or flowcharts, can be implemented using a dedicated hardware-based system that performs the specified function or action, or using a combination of dedicated hardware and computer instructions.

[0110] It should be noted that, in this disclosure, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element limited by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0111] While the embodiments disclosed herein are as described above, the foregoing content is merely for the purpose of facilitating understanding of this disclosure and is not intended to limit this disclosure. Any person skilled in the art to which this disclosure pertains may make any modifications and changes in form and detail of the implementation without departing from the spirit and scope of this disclosure; however, the scope of patent protection of this disclosure shall still be determined by the scope defined in the appended claims.

Claims

1. A method for storing and transporting hydrogen in a hydrogen production system, characterized in that, The hydrogen production system includes a hydrogen production unit, a hydrogen storage unit, and a long-distance pipeline unit connected in sequence; the hydrogen storage and transportation method includes: Obtain the attribute parameters of the hydrogen production unit and the hydrogen storage unit; the attribute parameters include the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit. Based on the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the maximum hydrogen storage volume of the hydrogen storage unit, a judgment condition is constructed to determine whether the hydrogen production of the hydrogen production unit at any time period can be stably output from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production of that time period. The hydrogen production unit’s annual unit time fluctuation output is divided into several time periods by using judgment conditions, so that the hydrogen fluctuation output of each time period can be stably output according to the average hydrogen output of that time period. The average hydrogen production over several time periods is used as the input amount from the hydrogen storage unit to the beginning of the long-distance pipeline unit during each time period. The process of constructing the determination criteria includes: Based on the supply and demand balance principle of hydrogen filling and releasing in storage tanks, a matching relationship is established between the allowable hydrogen storage volume and the fluctuating hydrogen flow rate at the beginning of the long-distance pipeline unit. Based on the annual hydrogen production per unit time fluctuation of the hydrogen production unit and the matching relationship, the average hydrogen production rate matched with the hydrogen storage volume in any time period is determined; the average hydrogen production rate is used as the hydrogen supply to the beginning of the long-distance pipeline unit in any time period. The condition that the hydrogen storage volume matching the average hydrogen production in any time period is less than the maximum hydrogen storage capacity of the hydrogen storage unit is established as a criterion for stably outputting hydrogen from the hydrogen storage unit to the long-distance pipeline unit at the average hydrogen production in that time period.

2. The hydrogen storage and transportation method for a hydrogen production system according to claim 1, characterized in that, The method of dividing the annual hydrogen production unit's unit-time fluctuation output into several time periods using judgment conditions, so that the hydrogen production fluctuation output in each time period can be stably output according to the average hydrogen production output of that time period, includes: The annual hydrogen production of the hydrogen production unit is accumulated starting from the first unit time, and the average hydrogen production within the accumulated time period is calculated simultaneously until the average hydrogen production within the accumulated time period does not meet the judgment criteria. Pick up the time period that meets the judgment condition before the cumulative calculation stops, as well as the hydrogen fluctuation output and average hydrogen output per unit time within that time period. Starting from the next unit time after picking the time period that meets the judgment condition, repeat the above steps until all the hydrogen unit time fluctuations throughout the year are traversed, resulting in hydrogen fluctuations for several time periods.

3. The hydrogen storage and transportation method for a hydrogen production system according to claim 2, characterized in that, The process of accumulating the annual hydrogen production of the hydrogen production unit starting from the first unit of time, and simultaneously calculating the average hydrogen production over the accumulated time period, until the average hydrogen production over the accumulated time period no longer meets the judgment criteria, includes: The annual hydrogen production of the hydrogen production unit is calculated by summing up the hydrogen production over the first unit of time to determine the sum of the fluctuating hydrogen production over the summing period. The average hydrogen production for a given period is calculated by summing the fluctuating hydrogen production over the cumulative time period. Determine whether the average hydrogen production during this period meets the judgment criteria; If the conditions are met, the cumulative calculation of fluctuating hydrogen production will continue, and the cumulative time period and the average hydrogen production during that time period will be updated. If the condition is not met, the cumulative calculation will stop.

4. The hydrogen storage and transportation method for a hydrogen production system according to claim 1, characterized in that, The acquisition of attribute parameters for the hydrogen production unit and the hydrogen storage unit includes: Obtain the annual hydrogen production per unit time fluctuation of the hydrogen production unit, as well as the number of hydrogen storage tanks and their attribute parameters for the hydrogen storage unit. The maximum hydrogen storage volume that the hydrogen storage unit can provide is determined based on the number of hydrogen storage spheres and the attribute parameters of the hydrogen storage spheres.

5. A method for storing and transporting hydrogen in a hydrogen production system according to claim 1, characterized in that, Also includes: Obtain the attribute parameters of the long-distance pipeline unit; Based on the property parameters of the long-distance pipeline unit and the compressibility of hydrogen, the hydrogen transmission pressure within the long-distance pipeline unit is determined to ensure stable output at the outlet of the long-distance pipeline unit.

6. A hydrogen production system, characterized in that, It includes a hydrogen production unit, a hydrogen storage unit, a long-distance pipeline unit, and a control unit; the hydrogen production unit, the hydrogen storage unit, and the long-distance pipeline unit are connected in sequence and are all connected to the control unit; the control unit is used to execute the hydrogen storage and transportation method according to any one of claims 1-5.

7. A hydrogen production system according to claim 6, characterized in that, It also includes a power generation unit connected to the hydrogen production unit and an energy storage unit connected to the power generation unit; the power generation unit includes any one or both of wind power generation units and photovoltaic power generation units; the energy storage unit is adapted to the wide power capacity of the hydrogen production unit.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory, characterized in that, The processor executes the computer program to implement the steps of the method according to any one of claims 1 to 5.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the computer program implements the steps of the method according to any one of claims 1 to 5.

Images