Design method, device, computer equipment and storage medium for hydrogen precooling device

Abstract

The present application discloses a design method, device, computer equipment, and storage medium for a hydrogen precooling device. The design method for the hydrogen precooling device of the present application includes: obtaining given values ​​of target parameters of the precooling medium and hydrogen; the target parameters include mass flow, temperature and pressure of the inlet and outlet; according to the given values ​​of the target parameters, presetting the structural parameters of the precooling medium flow channel and the hydrogen flow channel and the bottom wall temperature of the inlet and outlet; according to the given values ​​of the target parameters, the preset values ​​of the flow channel structural parameters, and the preset values ​​of the bottom wall temperature, determining the calculated values ​​of the bottom wall temperature of the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and the calculated value of the flow channel pressure drop; according to the calculated value of the bottom wall temperature, the calculated value of the flow channel pressure drop, and the preset threshold value, determining the design parameters of the hydrogen precooling device. The design method of the present application can realize the rapid design of the hydrogen precooling device.

Description

Technical Field

[0001] The present application relates to the technical field of chemical plant design, and in particular to a design method, device, computer equipment, and storage medium for a hydrogen precooling device. Background Art

[0002] With the gradual depletion of fossil fuel resources and the intensification of global climate change, it is increasingly important to diversify energy supplies to reduce dependence on fossil fuels. Hydrogen produces virtually no harmful substances during combustion or use, only water vapor, and is considered an ideal clean energy source. As a clean, carbon-free, flexible, efficient, and versatile secondary energy source and an important industrial raw material, hydrogen has a wide range of applications.

[0003] Hydrogen has a very low density, so large-scale storage requires compression or liquefaction. Furthermore, hydrogen is relatively reactive at room temperature, but its chemical activity decreases significantly when the temperature drops. Therefore, pre-cooling hydrogen before storage and transportation can effectively improve the safety and efficiency of storage and transportation.

[0004] The pre-cooling of hydrogen depends on the use of a hydrogen pre-cooling device. Different types of application scenarios have different requirements for the temperature, pressure, etc. of hydrogen. Therefore, it is crucial to provide a design method for a hydrogen pre-cooling device that can meet the application needs of different scenarios. Summary of the Invention

[0005] Based on this, the present application provides a design method, device, computer equipment, and storage medium for a hydrogen precooling device. The design method for a hydrogen precooling device provided by the present application presets the structural parameters of the precooling medium flow channel and the hydrogen flow channel and the bottom wall temperature of the inlet and outlet through the given values ​​of the target parameters of the precooling medium and hydrogen, and then determines the calculated values ​​of the bottom wall temperature of the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and the calculated value of the flow channel pressure drop in combination with the above given values ​​and preset values. By comparing the relationship between the calculated value and the preset threshold value, it is judged whether the preset value is reasonable. If it is reasonable, it is used as the design value. If it is unreasonable, the preset value is adjusted until the requirements are met. Through this design method, the flow channel design parameters of the hydrogen precooling device can be quickly determined, and the rapid design of the hydrogen precooling device can be realized.

[0006] A first aspect of the present application provides a method for designing a hydrogen precooling device, comprising the following steps:

[0007] Obtaining given values ​​of target parameters of the pre-cooling medium and hydrogen; the target parameters include mass flow rate, inlet and outlet temperatures and pressures;

[0008] According to the given values ​​of the target parameters of the pre-cooling medium and hydrogen, the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall temperature of the inlet and outlet are preset; the structural parameters include the equivalent diameter of the flow channel, the flow channel length, the thickness of the bottom wall of the flow channel, the total number of flow channels, and the type of flow channel plate material;

[0009] Determining calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and a calculated value of the flow channel pressure drop according to given values ​​of the target parameters of the precooling medium and hydrogen, preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0010] The structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall surface temperatures of the inlet and outlet are determined based on the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and the preset threshold values.

[0011] In some embodiments of the present application, the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are determined by the following method:

[0012] Determine the heat absorption of the precooling medium based on a given value of the mass flow rate of the precooling medium; determine the heat release of the hydrogen based on a given value of the mass flow rate of the hydrogen; determine the logarithmic mean temperature difference of the hydrogen precooling device based on given values ​​of the inlet and outlet temperatures of the precooling medium and hydrogen; determine the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the total heat transfer coefficient of the hydrogen precooling device based on given values ​​of target parameters of the precooling medium and hydrogen, preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall temperatures of the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0013] determining an effective heat exchange area of ​​the hydrogen precooling device according to the heat absorption of the precooling medium, the logarithmic mean temperature difference of the hydrogen precooling device, and the total heat exchange coefficient of the hydrogen precooling device;

[0014] The calculated values ​​of the bottom wall temperatures at the inlet and outlet of the precooling medium flow channel are determined based on the given values ​​of the precooling medium temperature at the inlet and outlet, the amount of heat absorbed by the precooling medium, the heat transfer coefficient between the precooling medium and the bottom wall of the flow channel at the inlet and outlet, and the effective heat exchange area of ​​the hydrogen precooling device; the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the hydrogen flow channel are determined based on the given values ​​of the hydrogen temperature at the inlet and outlet, the amount of heat released by the hydrogen, the heat transfer coefficient between the hydrogen and the bottom wall of the flow channel at the inlet and outlet, and the effective heat exchange area of ​​the hydrogen precooling device.

[0015] In some embodiments of the present application, the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the total heat transfer coefficient of the hydrogen precooling device are determined based on the given values ​​of the target parameters of the precooling medium and hydrogen, the preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and the preset values ​​of the bottom wall temperatures of the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel, including:

[0016] Determining the Nusselt numbers of the precooling medium and hydrogen at the inlet and outlet according to the given values ​​of the target parameters of the precooling medium and hydrogen, the preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and the preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0017] Determining the heat transfer coefficients between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, and the heat transfer coefficients between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, according to the Nusselt numbers of the precooling medium and the hydrogen at the inlet and outlet;

[0018] The total heat transfer coefficient of the hydrogen precooling device is determined based on the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, the thickness of the precooling medium flow channel and the bottom wall of the hydrogen flow channel, and the material type of the precooling medium flow channel plate and the hydrogen flow channel plate.

[0019] In some embodiments of the present application, the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are determined by equations 1 to 4:

[0020]

[0021] In formula 1, is the calculated value of the inlet bottom wall temperature of the pre-cooling medium flow channel; T 冷1 is the given value of the inlet temperature of the pre-cooling medium; Q 冷 is the heat absorbed by the precooling medium; A is the effective heat exchange area of ​​the hydrogen precooling device; h 冷1 is the heat transfer coefficient between the pre-cooling medium at the inlet and the bottom wall of the flow channel;

[0022] In formula 2, is the calculated value of the outlet bottom wall temperature of the pre-cooling medium flow channel; T 冷2 is the outlet temperature of the pre-cooling medium; Q 冷 is the heat absorbed by the precooling medium; A is the effective heat exchange area of ​​the hydrogen precooling device; h 冷2 is the heat transfer coefficient between the pre-cooling medium at the outlet and the bottom wall of the flow channel;

[0023] In formula 3, is the calculated value of the bottom wall temperature at the inlet of the hydrogen flow channel; T 氢1 is the given value of hydrogen inlet temperature; Q 氢 is the heat released by hydrogen; A is the effective heat exchange area of ​​the hydrogen precooling device; h 氢1 is the heat transfer coefficient between hydrogen at the inlet and the bottom wall of the flow channel;

[0024] In formula 4, is the calculated value of the outlet bottom wall temperature of the hydrogen flow channel; T 氢2 is the given value of hydrogen outlet temperature; Q 氢 is the heat released by hydrogen; A is the effective heat exchange area of ​​the hydrogen precooling device; h 氢2 is the heat transfer coefficient between hydrogen at the outlet and the bottom wall of the flow channel.

[0025] In some embodiments of the present application, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are determined by the following method:

[0026] Determining the average temperature and average pressure of the hydrogen flowing in the flow channel based on the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, and the given values ​​of the temperature and pressure at the inlet and outlet of the hydrogen; determining the average temperature and average pressure of the precooling medium flowing in the flow channel based on the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the given values ​​of the temperature and pressure at the inlet and outlet of the hydrogen;

[0027] Determining an average volume flow rate and an average resistance coefficient of the precooling medium and hydrogen flowing in the flow channel based on given values ​​of target parameters of the precooling medium and hydrogen, an average temperature and an average pressure of the precooling medium and hydrogen flowing in the flow channel, and preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel;

[0028] The calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are determined according to Formula 5 and Formula 6:

[0029]

[0030] In formula 5, ΔP 冷 is the calculated value of the flow channel pressure drop of the pre-cooling medium flow channel; f 冷 is the average resistance coefficient of the pre-cooling medium flowing in the flow channel; ρ 冷 u is the density of the pre-cooling medium at the average temperature and average pressure flowing in the flow channel; 冷 is the average volume flow rate of the pre-cooling medium flowing in the flow channel; l 冷 The preset value of the flow channel length of the pre-cooling medium flow channel; d 冷 Preset value for equivalent diameter of the pre-cooling medium flow channel;

[0031] In formula 6, ΔP氢 is the calculated value of the flow channel pressure drop of the hydrogen flow channel; f 氢 is the average resistance coefficient of hydrogen flowing in the flow channel; ρ 氢 is the density of hydrogen at the average temperature and average pressure flowing in the flow channel; u 氢 is the average volume flow rate of hydrogen flowing in the flow channel; l 氢 The preset value of the hydrogen flow channel length; d 氢 Preset value for the equivalent diameter of the hydrogen flow channel.

[0032] In some embodiments of the present application, the preset threshold includes a first preset threshold and a second preset threshold, the first preset threshold is a value within 1% of the preset value of the bottom wall surface temperature of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, and the second preset threshold is the flow channel pressure drop requirement value of the pre-cooling medium flow channel and the hydrogen flow channel.

[0033] In some embodiments of the present application, determining the design values ​​of the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel according to the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and a preset threshold value includes:

[0034] Determine the difference between the calculated bottom wall temperature values ​​of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel and the first preset threshold, and the difference between the calculated flow channel pressure drop values ​​of the pre-cooling medium flow channel and the hydrogen flow channel and the second preset threshold;

[0035] If the calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are within the first preset threshold range and the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are ≤ the second preset threshold, then the preset values ​​of the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall surface temperatures at the inlet and outlet are determined to be the design values.

[0036] A second aspect of the present application provides a device for setting up a hydrogen precooling device, comprising:

[0037] An acquisition module is used to obtain given values ​​of target parameters of the pre-cooling medium and hydrogen; the target parameters include mass flow rate, inlet and outlet temperature and pressure;

[0038] a preset module for presetting the structural parameters of the precooling medium flow channel and the hydrogen flow channel, as well as the bottom wall temperatures of the inlet and outlet, based on the given values ​​of the target parameters of the precooling medium and hydrogen; the structural parameters include the equivalent diameter of the flow channel, the flow channel length, the thickness of the bottom wall of the flow channel, the total number of flow channels, and the type of flow channel plate material;

[0039] a calculation module, configured to determine calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and a calculated value of the flow channel pressure drop based on given values ​​of the target parameters of the precooling medium and hydrogen, preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0040] a determination module, configured to determine the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel based on the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and a preset threshold.

[0041] A third aspect of the present application provides a computer device, comprising: a processor, and a memory communicatively connected to the processor;

[0042] The memory stores computer-executable instructions;

[0043] The processor executes the computer-executable instructions stored in the memory to implement the design method of the hydrogen precooling device as described in the first aspect of the present application.

[0044] The fourth aspect of the present application provides a computer-readable storage medium, which stores computer execution instructions. When the computer execution instructions are executed, the computer executes the design method of the hydrogen pre-cooling device as described in the first aspect of the present application.

[0045] The design method of the hydrogen precooling device provided in the present application is to preset the structural parameters of the precooling medium flow channel and the hydrogen flow channel and the bottom wall temperature of the inlet and outlet by the given values ​​of the target parameters of the precooling medium and hydrogen, and then determine the calculated value of the inlet and outlet bottom wall temperature of the precooling medium flow channel and the hydrogen flow channel and the calculated value of the flow channel pressure drop by combining the above given values ​​and the preset values. By comparing the relationship between the calculated value and the preset threshold value, it is judged whether the preset value is reasonable. If it is reasonable, it is used as the design value. If it is unreasonable, the preset value is adjusted until the requirements are met. Through this design method, the flow channel design parameters of the hydrogen precooling device can be quickly determined, and the rapid design of the hydrogen precooling device can be realized. The method is scientific and efficient, and has guiding significance for the design, operation and optimization of hydrogen precooling devices, especially high-pressure hydrogen precooling devices. BRIEF DESCRIPTION OF THE DRAWINGS

[0046] To more clearly illustrate the technical solutions of the embodiments of this application, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of this application. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0047] Figure 1 This is a side view of the hydrogen pre-cooling device in an embodiment of the present application;

[0048] Figure 2 for Figure 1 A top view of the hydrogen precooling device shown;

[0049] Figure 3 for Figure 1 The schematic structural diagram of the hydrogen precooling device at section AA is shown;

[0050] Figure 4 A schematic flow chart of a design method for a hydrogen pre-cooling device according to an embodiment of the present application;

[0051] Figure 5 A schematic structural diagram of the flow channel dimensions of the hydrogen pre-cooling device in an embodiment of the present application;

[0052] Figure 6 This is another structural schematic diagram of the flow channel size of the hydrogen pre-cooling device in the embodiment of the present application;

[0053] Figure 7 This is a schematic structural diagram of a pre-cooling medium flow channel plate of a hydrogen pre-cooling device in an embodiment of the present application;

[0054] Figure 8 This is a schematic diagram of the structure of the hydrogen flow channel plate of the hydrogen pre-cooling device in an embodiment of the present application;

[0055] Figure 9 A schematic diagram of the design of a hydrogen pre-cooling device provided in an embodiment of the present application;

[0056] Figure 10 A schematic diagram of a computer device provided in an embodiment of the present application.

[0057] Description of reference numerals:

[0058] 100: Hydrogen precooling device; 110: Hydrogen flow channel plate; 120: Precooling medium flow channel plate; 200: Precooling medium inlet; 300: Hydrogen inlet; 400: Precooling medium outlet; 500: Hydrogen outlet; 10: Design device of hydrogen precooling device; 11: Acquisition module; 12: Preset module; 13: Calculation module; 14: Determination module; 20: Computer equipment; 21: Processor; 22: Memory. DETAILED DESCRIPTION

[0059] In the description of this application, "several" means more than one, "plurality" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0060] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0061] Unless otherwise indicated, in this application, each reaction step may be carried out in the order in which it is presented, or may be carried out in an unspecified order. For example, other steps may be included between each reaction step, and the order of the reaction steps may be appropriately reversed. This is something that can be determined by a skilled person based on conventional knowledge and experience. Preferably, the reaction method in this embodiment is carried out sequentially.

[0062] Unless otherwise specified, the same symbols appearing in different formulas in this application have the same definitions, which are explained when the symbol first appears and are not repeated when it appears subsequently.

[0063] Figure 1 This is a side view of the hydrogen pre-cooling device in the embodiment of the present application. Figure 2 for Figure 1 The top view of the hydrogen precooling device shown, Figure 3 for Figure 1 Please refer to the schematic diagram of the hydrogen precooling device at section AA shown in the figure. Figures 1 to 3 The hydrogen precooling device 100 in the embodiment of the present application includes hydrogen flow channel plates 110 and precooling medium flow channel plates 120 that are alternately arranged, so that the upper and lower layers of each layer of hydrogen flow channel plates 110 are both precooling medium flow channel plates 120, and the upper and lower layers of each layer of precooling medium flow channel plates 120 are both hydrogen flow channel plates 110, wherein the hydrogen flow channel is located above the hydrogen flow channel plates 110, and the precooling medium flow channel is located above the precooling medium flow channel plates 120. When the hydrogen precooling device 100 is working, the precooling medium enters from the precooling medium inlet 200, and the hydrogen to be precooled enters from the hydrogen inlet 300. The two fluids, the precooling medium and the hydrogen, are separated by the flow channel plates and flow through the precooling medium flow channel and the hydrogen flow channel respectively, and finally flow out through the precooling medium outlet 400 and the hydrogen outlet 500 respectively. The precooling medium and the hydrogen perform heat exchange during the flow process to achieve precooling of the hydrogen.

[0064] The dimensions and structure of the precooling medium and hydrogen flow channels, as well as the inlet and outlet bottom wall temperatures, significantly impact hydrogen precooling efficiency and are crucial factors in hydrogen precooling device design. Therefore, determining these key parameters is crucial to hydrogen precooling device design.

[0065] Based on this, the first aspect of the present application provides a design method for a hydrogen pre-cooling device 100. Figure 4 For a flow chart of the design method of the hydrogen pre-cooling device provided in the embodiment of this application, please refer to Figure 4 The design method of the hydrogen precooling device of the present application includes the following steps:

[0066] S101: Obtaining given values ​​of target parameters of the pre-cooling medium and hydrogen; the target parameters include mass flow rate, inlet and outlet temperatures and pressures;

[0067] S102: Presetting structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel, as well as the bottom wall temperatures of the inlet and outlet, based on given values ​​of target parameters of the pre-cooling medium and hydrogen. The structural parameters include the equivalent diameter of the flow channel, the length of the flow channel, the thickness of the bottom wall of the flow channel, the total number of flow channels, and the type of material of the flow channel plate.

[0068] S103: Determining calculated values ​​of the bottom wall temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and a calculated value of the flow channel pressure drop based on given values ​​of target parameters of the precooling medium and hydrogen, preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0069] S104: Determine the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel based on the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and a preset threshold.

[0070] In step S101, obtaining the target values ​​of the pre-cooling medium and hydrogen refers to pre-setting the target parameter values. For example, the hydrogen inlet temperature can be set to 520K, the pressure to 20MPa, the outlet temperature to 260K, the pressure to 19.98MPa, and the mass flow rate to 16.67g / s; and the pre-cooling medium inlet temperature can be set to 230K, the pressure to 20MPa, the outlet temperature to 420MPa, the outlet pressure to 19.96MPa, and the mass flow rate to 69.44g / s. The given target parameter values ​​are then used as design targets to design the hydrogen pre-cooling device required under these given values.

[0071] It is understandable that the type of pre-cooling medium also belongs to the predetermined target parameters, including but not limited to one or more of liquid ammonia, liquid nitrogen, liquid helium, liquid carbon dioxide, and a mixture of water and ethylene glycol.

[0072] In step S102, the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel, as well as the bottom wall temperatures of the inlet and outlet, can be determined based on the given values ​​of the target parameters of the pre-cooling medium and hydrogen, and then preset in combination with the principles of heat transfer.

[0073] The shapes of the pre-cooling medium flow channel and the hydrogen flow channel can be preset to common shapes such as circular, square, rectangular, and serpentine. The flow channel shape can be adjusted by controlling the structure of the flow channel plate. For example, by providing a semicircular groove on the flow channel plate, a semicircular flow channel can be obtained, and by providing a rectangular groove on the flow channel plate, a rectangular flow channel can be obtained. Figure 5 and Figure 6 They are schematic diagrams of two different types of flow channel size structures of the hydrogen pre-cooling device in the embodiment of the present application, Figure 5 The flow channel shown is a rectangular flow channel. Figure 6 The flow channel shown is a semicircular flow channel. Figure 5 and Figure 6 In the figure, each dotted line represents a flow channel, and two adjacent flow channels are separated by ribs. Figure 5 In the figure, the channel width is represented by W and the channel height is represented by H. As long as the width W and height H of the rectangular channel are determined, the equivalent channel diameter d can be calculated according to the formula 2WH / (W+H). Figure 6 In the equation, the flow channel diameter is the flow channel equivalent diameter d. Figure 5 and Figure 6 The thickness of the bottom wall of the flow channel is expressed as δ. The flow channel dimensions of the hydrogen flow channel and the pre-cooling medium can refer to the Figure 5 and Figure 6 Make a preset.

[0074] In addition to the regular-shaped flow channel plates listed above, special-shaped flow channel plates can also be provided, including but not limited to corrugated or Z-shaped flow channel plates (such as Figure 7 and Figure 8 As shown), the special-shaped runner plate can increase the runner length.

[0075] For the equivalent diameter of a flow channel, taking a circular flow channel as an example, the relationship between mass flow rate and the product of mass flow rate and flow channel cross-sectional area is satisfied. While the mass flow rate is given, the mass flow rate must also be controlled within a certain range to ensure good heat transfer and flow performance and prevent excessive pressure loss or unstable flow. Therefore, the equivalent diameter of the flow channel can be preset based on this. The flow channel length and total number of flow channels can also be preset based on similar principles and will not be further elaborated here.

[0076] As for the type of flow channel plate material, materials with good thermal conductivity, corrosion resistance and mechanical strength, such as 304 stainless steel or 316L stainless steel, can be preset based on factors such as the properties of hydrogen and pre-cooling medium, the target temperature and pressure of pre-cooling, etc.

[0077] The bottom wall temperature at the flow channel inlet and outlet can be preset based on the basic principles of heat transfer. For example, according to the second law of thermodynamics, heat always transfers from a high-temperature object to a low-temperature object, and the driving force of heat transfer is the temperature difference. To achieve pre-cooling of hydrogen, the bottom wall temperature at the hydrogen flow channel inlet must be lower than the initial temperature of the hydrogen (i.e., the temperature of the hydrogen at the inlet). Based on the given pre-cooling medium and hydrogen inlet and outlet temperature values ​​combined with the logarithmic mean temperature difference calculation formula during the heat transfer process, a preliminary estimate of the required temperature difference between the flow channel inlet and outlet bottom wall and the corresponding fluid (pre-cooling medium or hydrogen) can be made, thereby pre-setting the bottom wall temperature at the flow channel inlet and outlet.

[0078] It should be noted that in this application, the hydrogen inlet and the hydrogen flow channel inlet are the same port, similarly, the hydrogen outlet and the hydrogen flow channel outlet are the same port, the precooling medium inlet and the hydrogen flow channel inlet are the same port, and the precooling medium outlet and the precooling medium flow channel outlet are the same port.

[0079] For the thickness of the bottom wall of the flow channel, the thickness of the bottom wall of the flow channel that meets the heat transfer requirements is preset based on factors such as thermal conductivity, processing difficulty, flow channel strength requirements and welding process.

[0080] In step S103, based on the given values ​​of the target parameters of the precooling medium and hydrogen, the preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and the preset values ​​of the bottom wall temperature at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel, the kinematic viscosity, Prandtl number, Reynolds number, Nusselt number and other values ​​of the precooling medium and hydrogen flowing in the flow channel can be determined, and then the heat transfer coefficient between the corresponding fluid and the bottom wall of the flow channel can be determined. In combination with the fouling thermal resistance of the precooling medium and hydrogen in the flow channel plate of a specific material, the total heat transfer coefficient of the hydrogen precooling device is obtained, and then the effective heat exchange area of ​​the hydrogen precooling medium is determined. In combination with the above values, the calculated values ​​of the bottom wall temperature at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and the calculated value of the flow channel pressure drop can be determined.

[0081] In step S104, the calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, and the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are compared with the preset thresholds. If the calculated values ​​meet the requirements of the preset thresholds, the preset values ​​of the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel in step S102 are determined as the final design values. If the requirements of the preset thresholds are not met, the above preset values ​​are adjusted and the calculation is iterated again until the requirements are met.

[0082] The design method of the hydrogen precooling device provided in the present application is to preset the structural parameters of the precooling medium flow channel and the hydrogen flow channel and the bottom wall temperature of the inlet and outlet by the given values ​​of the target parameters of the precooling medium and hydrogen, and then determine the calculated value of the inlet and outlet bottom wall temperature of the precooling medium flow channel and the hydrogen flow channel and the calculated value of the flow channel pressure drop by combining the above given values ​​and the preset values. By comparing the relationship between the calculated value and the preset threshold value, it is judged whether the preset value is reasonable. If it is reasonable, it is used as the design value. If it is unreasonable, the preset value is adjusted until the requirements are met. Through this design method, the flow channel design parameters of the hydrogen precooling device can be quickly determined, and the rapid design of the hydrogen precooling device can be realized. The method is scientific and efficient, and has guiding significance for the design, operation and optimization of hydrogen precooling devices, especially high-pressure hydrogen precooling devices.

[0083] In some embodiments of the present application, in step S103, the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are determined by the following method:

[0084] S11: determining the amount of heat absorbed by the precooling medium based on a given value of the mass flow rate of the precooling medium; determining the amount of heat released by the hydrogen based on a given value of the mass flow rate of the hydrogen; determining the logarithmic mean temperature difference of the hydrogen precooling device based on given values ​​of the inlet and outlet temperatures of the precooling medium and hydrogen; determining the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the total heat transfer coefficient of the hydrogen precooling device based on given values ​​of target parameters of the precooling medium and hydrogen, preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall temperatures of the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0085] S12: Determine the effective heat exchange area of ​​the hydrogen precooling device based on the heat absorption of the precooling medium, the logarithmic mean temperature difference of the hydrogen precooling device, and the total heat transfer coefficient of the hydrogen precooling device;

[0086] S13: Determine the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the precooling medium flow channel based on the given values ​​of the precooling medium temperature at the inlet and outlet, the amount of heat absorbed by the precooling medium, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the effective heat transfer area of ​​the hydrogen precooling device; determine the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the hydrogen flow channel based on the given values ​​of the hydrogen temperature at the inlet and outlet, the amount of heat released by hydrogen, the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, and the effective heat transfer area of ​​the hydrogen precooling device.

[0087] In S11, the heat released by hydrogen and the heat absorbed by the pre-cooling medium can be calculated according to Equation 7 and Equation 8 respectively:

[0088] Q 氢 =q 氢 (H 氢1 -H 氢2 ) Equation 7

[0089] Q 冷 =q 冷 (H 冷2 -H 冷1 ) Equation 8

[0090] In formula 7, Q 氢 The heat released by hydrogen; q 氢 is the given value of hydrogen mass flow rate; H 氢1 is the enthalpy of hydrogen at the inlet; H 氢2 is the enthalpy of hydrogen at the outlet.

[0091] In formula 8, Q 冷 The pre-cooling medium absorbs heat; q 冷 is the given value of the mass flow of the pre-cooling medium; H 冷1 is the enthalpy value at the inlet of the precooling medium; H 冷2 is the enthalpy value at the outlet of the precooling medium.

[0092] In Equations 7 and 8, the enthalpy values ​​at the inlet and outlet of hydrogen and the pre-cooling medium can be obtained by looking up the corresponding enthalpy values ​​in the thermophysical property database based on the temperature and pressure at the inlet and outlet.

[0093] In S11, the logarithmic mean temperature difference can be determined by combining the flow state of the pre-cooling medium and hydrogen in the flow channel with the temperature set values ​​of the inlet and outlet. For example, when the pre-cooling medium and hydrogen flow in countercurrent, the logarithmic mean temperature difference can be calculated by combining equations 9 to 11 to obtain:

[0094]

[0095] ΔT max =max(T 氢1 -T 冷2 , T 氢2 -T冷1 ) Formula 10

[0096] ΔT min =min(T 氢1 -T 冷2 , T 氢2 -T 冷1 ) Formula 11

[0097] In formula 9, ΔT is the logarithmic mean temperature difference; ΔT max and ΔT min Calculated by Equation 10 and Equation 11 respectively.

[0098] In Equations 10 and 11, T 氢1 is the given temperature at the hydrogen inlet; T 氢2 is the given value of the temperature at the hydrogen outlet; T 冷1 is the given temperature value at the inlet of the pre-cooling medium; T 冷2 It is the given value of the temperature at the outlet of the pre-cooling medium.

[0099] In some embodiments of the present application, in S11, based on given values ​​of target parameters of the precooling medium and hydrogen, preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel, the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall surface of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall surface of the flow channel, and the total heat transfer coefficient of the hydrogen precooling device are determined, including:

[0100] S1: determining the Nusselt numbers of the precooling medium and hydrogen at the inlet and outlet according to the given values ​​of the target parameters of the precooling medium and hydrogen, the preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and the preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0101] S2: Based on the Nusselt numbers of the precooling medium and hydrogen at the inlet and outlet, determine the heat transfer coefficients between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, as well as the heat transfer coefficients between the precooling medium at the inlet and outlet and the bottom wall of the flow channel;

[0102] S3: Determine the total heat transfer coefficient of the hydrogen precooling device based on the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, the thickness of the precooling medium flow channel and the bottom wall of the hydrogen flow channel, and the material type of the precooling medium flow channel plate and the hydrogen flow channel plate.

[0103] In S1, the Nusselt numbers of the precooling medium and hydrogen at the inlet and outlet can be determined by Equations 12 to 15, respectively:

[0104]

[0105] In formula 12, is the Nusselt number of the precooling medium at the inlet; d 冷 is the equivalent diameter of the pre-cooling medium flow channel; l 冷 is the length of the pre-cooling medium flow channel; is the Reynolds number of the precooling medium at the inlet, which can be calculated by formula 16. is the resistance coefficient of the pre-cooling medium at the inlet, which can be obtained by Sure; is the Prandtl number of the precooling medium at a given inlet temperature and pressure, is the Prandtl number at the preset bottom wall temperature and pressure at the inlet of the pre-cooling medium flow channel, and The physical property parameter database can be queried.

[0106] In formula 13, is the Nusselt number of the precooling medium at the outlet; is the Reynolds number of the precooling medium at the outlet, which can be calculated by formula 17. is the resistance coefficient of the pre-cooling medium at the outlet, which can be obtained by Sure; is the Prandtl number of the precooling medium at a given outlet temperature and pressure, is the Prandtl number at the preset bottom wall temperature and pressure at the outlet of the pre-cooling medium flow channel, and The physical property parameter database can be queried.

[0107] In formula 14, is the Nusselt number of hydrogen at the inlet; d 氢 is the equivalent diameter of the hydrogen flow channel; l 氢 is the flow channel length of the hydrogen flow channel; is the Reynolds number of hydrogen at the inlet, which can be calculated by formula 18, is the resistance coefficient of hydrogen at the inlet, which can be obtained by Sure; is the Prandtl number of hydrogen at a given inlet temperature and pressure, is the Prandtl number at the preset bottom wall temperature and pressure at the inlet of the hydrogen flow channel, and The physical property parameter database can be queried.

[0108] In formula 15, is the Nusselt number of hydrogen at the outlet; is the Reynolds number of hydrogen at the outlet, which can be calculated by formula 19, is the resistance coefficient of hydrogen at the outlet, which can be obtained by Sure; is the Prandtl number of hydrogen at a given outlet temperature and pressure, is the Prandtl number at the preset bottom wall temperature and pressure at the outlet of the hydrogen flow channel, and The physical property parameter database can be queried.

[0109] It should be noted that the bottom wall surface of the flow channel is consistent with the pressure of the fluid in the same radial direction. Therefore, the bottom wall surface pressures of the pre-cooling medium flow channel and the hydrogen flow channel required for calculation in the above Formulas 12 to 15 at the inlet and outlet are consistent with the given pre-cooling medium and hydrogen pressures at the inlet and outlet.

[0110]

[0111] In formula 16, is the volume flow rate of the precooling medium at the inlet, which can be calculated by formula 20; is the kinematic viscosity of the pre-cooling medium at the inlet, obtained by querying the thermophysical property database based on the given values ​​of the temperature and pressure of the pre-cooling medium inlet;

[0112] In formula 17, is the volume flow rate of the precooling medium at the outlet, which can be calculated by formula 21; is the kinematic viscosity of the pre-cooling medium at the outlet, obtained by querying the thermophysical property database based on the given values ​​of the temperature and pressure of the pre-cooling medium outlet;

[0113] In formula 18, is the volume flow rate of hydrogen at the inlet, which can be calculated by Equation 22; is the kinematic viscosity of hydrogen at the inlet, obtained by querying the thermophysical properties database based on the given values ​​of the hydrogen inlet temperature and pressure;

[0114] In formula 19, is the volume flow rate of hydrogen at the outlet, which can be calculated by Equation 23; is the kinematic viscosity of hydrogen at the outlet, which is obtained by querying the thermophysical property database based on the given values ​​of the temperature and pressure of the hydrogen outlet.

[0115]

[0116] In formula 20, q 冷 is the mass flow rate of the pre-cooling medium; n 冷 is the total number of pre-cooling medium flow channels; ρ 冷1 The density corresponding to the given values ​​of the inlet temperature and pressure of the pre-cooling medium can be obtained by querying the thermophysical parameter database;

[0117] In formula 21, ρ 冷2 The density corresponding to the given values ​​of outlet temperature and pressure of the pre-cooling medium can be obtained by querying the thermophysical parameter database;

[0118] In formula 22, q 氢 is the given value of the mass flow rate of hydrogen; n 氢 is the total number of hydrogen flow channels; The density corresponding to the given values ​​of hydrogen inlet temperature and pressure can be obtained by querying the thermophysical parameter database;

[0119] In formula 23, The density corresponding to the given values ​​of hydrogen outlet temperature and pressure can be obtained by querying the thermophysical parameter database.

[0120] The Reynolds number can be used to determine whether the flow state of hydrogen and pre-cooling medium is laminar, turbulent, or a transitional state between the two. The corresponding drag coefficient calculation method is then determined based on the different flow states. Typically, hydrogen and pre-cooling medium are in a turbulent state due to their high pressures. The drag coefficients at the inlet and outlet are calculated using Equations 24 to 27, respectively:

[0121]

[0122] In Equations 24 to 27, is the resistance coefficient of the pre-cooling medium at the inlet, is the resistance coefficient of the precooling medium at the outlet, is the resistance coefficient of hydrogen at the inlet, is the resistance coefficient of hydrogen at the outlet.

[0123] In S2, the heat transfer coefficients between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, and the heat transfer coefficients between the precooling medium at the inlet and outlet and the bottom wall of the flow channel can be determined by equations 28 to 31, respectively:

[0124]

[0125]

[0126] In formula 28, is the heat transfer coefficient between the pre-cooling medium at the inlet and the bottom wall of the flow channel; is the thermal conductivity of the pre-cooling medium at the inlet, which is obtained by querying the thermophysical property database based on the given values ​​of the inlet temperature and pressure of the pre-cooling medium;

[0127] In formula 29, is the heat transfer coefficient between the pre-cooling medium at the outlet and the bottom wall of the flow channel; is the thermal conductivity of the pre-cooling medium at the outlet, which is obtained by querying the thermophysical property database in combination with the given values ​​of the outlet temperature and pressure of the pre-cooling medium;

[0128] In formula 30, is the heat transfer coefficient between hydrogen at the inlet and the bottom wall of the flow channel; is the thermal conductivity of hydrogen at the inlet, which is obtained by querying the thermophysical property database based on the given values ​​of hydrogen inlet temperature and pressure;

[0129] In formula 31, is the heat transfer coefficient between hydrogen at the outlet and the bottom wall of the flow channel; is the thermal conductivity of hydrogen at the outlet, which is obtained by querying the thermophysical property database based on the given values ​​of hydrogen outlet temperature and pressure.

[0130] In S3, the total heat transfer coefficient of the hydrogen precooling device can be calculated according to formula 32:

[0131]

[0132] In formula 32, h 总 is the total heat transfer coefficient of the hydrogen precooling device; h 冷 is the average heat transfer coefficient between the precooling medium and the bottom wall of the flow channel; R 冷 is the fouling thermal resistance between the pre-cooling medium and the bottom wall of the flow channel; R 氢 is the fouling thermal resistance between hydrogen and the bottom wall of the flow channel; δ 冷 is the bottom wall thickness of the pre-cooling medium flow channel; is the thermal conductivity of the bottom wall of the pre-cooling medium flow channel, which can be obtained by consulting the metal material performance manual based on the material type of the pre-cooling medium flow channel plate and the average temperature of the bottom wall of the pre-cooling medium flow channel; h 氢 is the average heat transfer coefficient between hydrogen and the bottom wall of the flow channel; δ 氢 is the thickness of the bottom wall of the hydrogen flow channel; is the thermal conductivity of the bottom wall of the hydrogen flow channel, which can be obtained by consulting the metal material performance manual based on the material type of the hydrogen flow channel plate and the average temperature of the bottom wall of the hydrogen flow channel.

[0133] R 冷 and R 氢 You can find it by looking up professional books (for example: Yang Shanrang, Xu Zhiming, Sun Lingfang. Fouling and Countermeasures of Heat Exchanger Equipment [M]. 2nd edition. Beijing: Science Press, 2004: 1-48, 578-582.) or databases.

[0134] For h 冷 ,like and If the difference between the two is within 10%, it means that the flow state of the pre-cooling medium in the flow channel is relatively uniform, without obvious local high heat or complex flow separation. and The average value of h 冷 The value of ; if and If the difference between the two exceeds 10%, it means that the flow state of the pre-cooling medium in the flow channel is more complicated. At this time, the flow channel needs to be divided into multiple units for segmented calculation according to the given values ​​of the inlet and outlet temperatures of the pre-cooling medium and the preset values ​​of the inlet and outlet temperatures of the bottom wall of the flow channel. For example, it is divided into the first unit, the second unit and the third unit. Each unit includes an inlet and an outlet. The outlet of the first unit is the inlet of the second unit, and the outlet of the second unit is the inlet of the third unit. The heat transfer coefficient between the pre-cooling medium at the inlet and outlet of each unit and the temperature of the bottom wall of the flow channel is calculated. If the difference between the two is within 10%, it means that the division is reasonable. The average value of the heat transfer coefficients between the pre-cooling medium and the bottom wall of the flow channel at the inlet and outlet of all units is the average heat transfer coefficient h between the pre-cooling medium and the bottom wall of the flow channel. 冷 If the difference between the two still exceeds 10%, continue to divide the units until the difference in heat transfer coefficient between the pre-cooling medium and the bottom wall of the flow channel at the inlet and outlet of each unit is within 10%.

[0135] Similarly, for h 氢 , also refer to the above h 冷 The calculation is performed in this way, which will not be described here.

[0136] For the average temperature and average pressure of the bottom wall of the pre-cooling medium flow channel, if and If the difference between the two is within 10%, the average temperature of the bottom wall of the pre-cooling medium is the average of the preset values ​​of the bottom wall temperature at the inlet and outlet of the flow channel, and the average pressure of the bottom wall of the pre-cooling medium is the average of the bottom wall pressures at the inlet and outlet of the flow channel; otherwise, according to the above-mentioned segmentation method, the pre-cooling medium flow channel is divided into multiple units with a heat transfer coefficient difference of less than 10% at the inlet and outlet of each unit, and then the average value of the bottom wall temperature of all unit inlet and outlet flow channels is taken as the average temperature of the bottom wall of the pre-cooling medium flow channel, and the average value of the bottom wall pressure of the unit inlet and outlet flow channels is the average pressure of the bottom wall of the pre-cooling medium flow channel.

[0137] The average temperature and average pressure of the bottom wall of the hydrogen flow channel are calculated by referring to the calculation method of the average temperature and average pressure of the bottom wall of the pre-cooling medium flow channel, which will not be repeated here.

[0138] In some embodiments of the present application, in S12, the heat absorption Q of the pre-cooling medium is calculated and obtained respectively. 冷, logarithmic mean temperature difference ΔT and total heat transfer coefficient h 总 Then, the heat exchange area A of the hydrogen precooling device can be determined according to formula 33:

[0139]

[0140] In some embodiments of the present application, in S13, the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are determined by equations 1 to 4:

[0141]

[0142]

[0143] In formula 1 to formula 4, is the calculated value of the inlet bottom wall temperature of the pre-cooling medium flow channel; T 冷1 is the given value of the inlet temperature of the pre-cooling medium; is the calculated value of the outlet bottom wall temperature of the pre-cooling medium flow channel; T 冷2 The outlet temperature of the pre-cooling medium is given; is the calculated value of the bottom wall temperature at the inlet of the hydrogen flow channel; T 氢1 is the given value of hydrogen inlet temperature; is the calculated value of the outlet bottom wall temperature of the hydrogen flow channel; T 氢2 is the given value of the outlet temperature of hydrogen.

[0144] In some embodiments of the present application, in S103, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are determined by the following method:

[0145] S01: Determine the average temperature and average pressure of the hydrogen flowing in the flow channel based on the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, as well as the given values ​​of the temperature and pressure of the hydrogen at the inlet and outlet; determine the average temperature and average pressure of the pre-cooling medium flowing in the flow channel based on the heat transfer coefficient between the pre-cooling medium at the inlet and outlet and the bottom wall of the flow channel, as well as the given values ​​of the temperature and pressure of the hydrogen at the inlet and outlet;

[0146] S02: determining an average volume flow rate and an average resistance coefficient of the precooling medium and hydrogen flowing in the flow channel based on given values ​​of target parameters of the precooling medium and hydrogen, an average temperature and an average pressure of the precooling medium and hydrogen flowing in the flow channel, and preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel;

[0147] S03: Determine the calculated pressure drop values ​​of the pre-cooling medium flow channel and the hydrogen flow channel according to Formula 5 and Formula 6:

[0148]

[0149] In formula 5, ΔP 冷 is the calculated value of the flow channel pressure drop of the pre-cooling medium flow channel; f 冷 is the average resistance coefficient of the pre-cooling medium flowing in the flow channel; ρ 冷 u is the density of the pre-cooling medium at the average temperature and average pressure flowing in the flow channel; 冷 is the average volume flow rate of the pre-cooling medium flowing in the flow channel.

[0150] In formula 6, ΔP 氢 is the calculated value of the flow channel pressure drop of the hydrogen flow channel; f 氢 is the average resistance coefficient of hydrogen flowing in the flow channel; ρ 氢 is the density of hydrogen at the average temperature and average pressure when it flows in the flow channel, which can be obtained by querying the physical property database; u 氢 is the average volume flow rate of hydrogen flowing in the flow channel.

[0151] Among them, in S01, the average temperature and average pressure of the hydrogen and pre-cooling medium flowing in the flow channel can be calculated by referring to the average temperature and average pressure of the bottom wall of the pre-cooling medium and hydrogen flow channel mentioned above. The difference is that according to the given values ​​of the temperature and pressure of the inlet and outlet of the hydrogen and pre-cooling medium, the average value is taken or used as the standard for dividing multiple units.

[0152] In S02, the average volume flow rate and average resistance coefficient of the pre-cooling medium and hydrogen flowing in the flow channel are calculated by referring to the volume flow rate calculation formulas shown in the aforementioned Formulas 20 to 23 and the resistance calculation formulas shown in the aforementioned Formulas 24 to 27, respectively. The difference is that the temperature and pressure required in the calculation process are replaced by the average temperature and average pressure of the hydrogen and pre-cooling medium flowing in the flow channel calculated in S01.

[0153] In S03, ρ 氢 and ρ 冷 The corresponding physical property parameter database can be obtained.

[0154] In some embodiments of the present application, in S104, the preset threshold value includes a first preset threshold value and a second preset threshold value, the first preset threshold value is a value within a range of 1% difference from the preset value of the bottom wall temperature of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, that is, a range value within 0.99 times to 1.01 times the preset value, and the second preset threshold value is the flow channel pressure drop requirement value of the pre-cooling medium flow channel and the hydrogen flow channel. The flow channel pressure drop requirement value can be determined according to different application scenarios and different requirement standards. For example, in a hydrogen pre-cooling device used in a hydrogen refueling station, when the mass flow rate of hydrogen is 200kg / hr and the inlet pressure is 60MPa, the pressure drop requirement value of the hydrogen flow channel is ≤9000Pa, the pre-cooling medium is a mixture of water and ethylene glycol, the mass flow rate is 10400kg / hr, the inlet pressure is 5MPa, and the pressure drop requirement value of the pre-cooling medium flow channel is ≤500000Pa.

[0155] Furthermore, in S104, based on the calculated values ​​of the bottom wall temperatures at the inlets and outlets of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and the preset thresholds, the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall temperatures at the inlets and outlets are determined, including:

[0156] Determine the difference between the calculated bottom wall temperature values ​​of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel and a first preset threshold value, and the difference between the calculated flow channel pressure drop values ​​of the pre-cooling medium flow channel and the hydrogen flow channel and a second preset threshold value;

[0157] If the calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are within the first preset threshold range and the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are ≤ the second preset threshold, then the preset values ​​of the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall surface temperatures at the inlet and outlet are determined to be the design values.

[0158] On the contrary, if the above requirements are not met, the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the preset values ​​of the bottom wall temperature of the inlet and outlet are adjusted and iteratively calculated until the requirements of the first preset threshold and the second preset threshold are met before the design value is output.

[0159] The rapid and accurate calculation of the flow channel pressure drop and bottom wall temperature is an important factor in the design of pre-cooling devices. The flow channel pressure drop will cause the fluid to overcome greater resistance when flowing in the pre-cooling device, which requires the pre-cooling device to have greater power to promote the flow of fluid, which will increase the energy consumption of the device. In addition, excessive pressure drop will lead to uneven distribution of the flow velocity of the fluid in the pre-cooling device, resulting in local flow velocity being too high or too low, which is also not conducive to heat transfer. Reasonable flow channel pressure drop values ​​can reflect the rationality of the device structure design and achieve a balance between equipment investment and operating costs. Inaccurate calculation of the bottom wall temperature directly affects the heat transfer temperature difference of the pre-cooling device. Rapid and accurate calculation of the bottom wall temperature can quickly and effectively obtain the heat transfer coefficient between the fluid and the flow channel wall. If the bottom wall temperature is not calculated reasonably, it may cause a large deviation in the heat transfer coefficient between the fluid and the flow channel wall, thereby affecting the accuracy of the heat exchange area and making the pre-cooling device structure design unable to meet the design requirements. This application calculates the bottom wall temperature of the flow channel inlet and outlet, reversely infers whether the preset inlet and outlet bottom wall temperatures are reasonable, and combines the calculated flow channel pressure drop value with the required value to make the designed hydrogen precooling device have higher heat transfer efficiency and more reasonable structural parameters.

[0160] The second aspect of the present application provides a design device for a hydrogen precooling device, Figure 9 For the schematic diagram of the design of the hydrogen pre-cooling device provided in the embodiment of this application, please refer to Figure 9 , the design device 10 of the hydrogen precooling device includes:

[0161] An acquisition module 11 is used to obtain given values ​​of target parameters of the pre-cooling medium and hydrogen; the target parameters include mass flow rate, inlet and outlet temperatures and pressures;

[0162] A preset module 12 is used to preset the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel, as well as the bottom wall temperature of the inlet and outlet according to the given values ​​of the target parameters of the pre-cooling medium and hydrogen. The structural parameters include the equivalent diameter of the flow channel, the flow channel length, the thickness of the bottom wall of the flow channel, the total number of flow channels, and the type of flow channel plate material;

[0163] a calculation module 13 for determining calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and a calculated value of the flow channel pressure drop based on given values ​​of target parameters of the precooling medium and hydrogen, preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel;

[0164] The determination module 14 is used to determine the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel based on the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and a preset threshold.

[0165] Since the implementation solution of the above-mentioned design device of the hydrogen precooling device is similar to the design method of the hydrogen precooling device, the implementation of the specific design device can refer to the implementation of the above-mentioned design method, and the repeated parts will not be repeated.

[0166] A third aspect of the present application provides a computer device, Figure 10 For a schematic diagram of the computer device provided in the embodiment of this application, see Figure 10 The computer device 20 includes a processor 21 and a memory 22 in communication with the processor 21. The memory 22 stores computer-executable instructions, and the processor 21 executes the computer-executable instructions stored in the memory to implement the design method of the hydrogen precooling device provided in any of the above embodiments.

[0167] In a fourth aspect, the present application provides a computer-readable storage medium, which stores computer-executable instructions. When the instructions are executed, the computer-executable instructions are executed by a processor to implement the design method of a hydrogen precooling device provided in any of the above embodiments.

[0168] It should be noted that the computer-readable storage medium may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), a magnetic random access memory (FRAM), a flash memory, a magnetic surface mount storage device, an optical disc, or a compact disc read-only memory (CD-ROM). It may also be various electronic devices that include one or any combination of the above memories, such as mobile phones, computers, tablet devices, personal digital assistants, etc.

[0169] It should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0170] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in each embodiment of the present application.

[0171] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the steps in the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0172] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0173] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0174] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0175] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0176] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A design method for a hydrogen precooling device, characterized in that: The following steps are involved: Obtaining given values ​​of target parameters of the pre-cooling medium and hydrogen; the target parameters include mass flow rate, inlet and outlet temperatures and pressures; According to the given values ​​of the target parameters of the pre-cooling medium and hydrogen, the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall surface temperatures of the inlet and outlet are preset; The structural parameters include the equivalent diameter of the flow channel, the length of the flow channel, the thickness of the bottom wall of the flow channel, the total number of flow channels and the type of material of the flow channel plate; Determining calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and a calculated value of the flow channel pressure drop according to given values ​​of the target parameters of the precooling medium and hydrogen, preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel; The structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall surface temperatures of the inlet and outlet are determined based on the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and the preset threshold values.

2. The design method according to claim 1, characterized in that: The calculated values ​​of the bottom wall temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are determined by the following method: Determine the heat absorption of the precooling medium according to the given value of the mass flow of the precooling medium; determine the heat release of the hydrogen according to the given value of the mass flow of the hydrogen; determine the logarithmic mean temperature difference of the hydrogen precooling device according to the given values ​​of the inlet and outlet temperatures of the precooling medium and hydrogen; Determining, based on given values ​​of target parameters of the precooling medium and hydrogen, preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of bottom wall temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel, a heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, a heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and an overall heat transfer coefficient of the hydrogen precooling device; determining an effective heat exchange area of ​​the hydrogen precooling device according to the heat absorption of the precooling medium, the logarithmic mean temperature difference of the hydrogen precooling device, and the total heat exchange coefficient of the hydrogen precooling device; The calculated values ​​of the bottom wall temperatures at the inlet and outlet of the precooling medium flow channel are determined based on the given values ​​of the precooling medium temperature at the inlet and outlet, the amount of heat absorbed by the precooling medium, the heat transfer coefficient between the precooling medium and the bottom wall of the flow channel at the inlet and outlet, and the effective heat exchange area of ​​the hydrogen precooling device; the calculated values ​​of the bottom wall temperatures at the inlet and outlet of the hydrogen flow channel are determined based on the given values ​​of the hydrogen temperature at the inlet and outlet, the amount of heat released by the hydrogen, the heat transfer coefficient between the hydrogen and the bottom wall of the flow channel at the inlet and outlet, and the effective heat exchange area of ​​the hydrogen precooling device.

3. The design method according to claim 2, characterized in that: The method of determining the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the total heat transfer coefficient of the hydrogen precooling device based on the given values ​​of the target parameters of the precooling medium and the hydrogen, the preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and the preset values ​​of the bottom wall temperatures of the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel, includes: Determining the Nusselt numbers of the precooling medium and hydrogen at the inlet and outlet according to the given values ​​of the target parameters of the precooling medium and hydrogen, the preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and the preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel; Determining the heat transfer coefficients between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, and the heat transfer coefficients between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, according to the Nusselt numbers of the precooling medium and the hydrogen at the inlet and outlet; The total heat transfer coefficient of the hydrogen precooling device is determined based on the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, the thickness of the precooling medium flow channel and the bottom wall of the hydrogen flow channel, and the material type of the precooling medium flow channel plate and the hydrogen flow channel plate.

4. The design method according to claim 3, characterized in that: The calculated values ​​of the bottom wall temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are determined by equations 1 to 4: In formula 1, is the calculated value of the inlet bottom wall temperature of the pre-cooling medium flow channel; T 冷1 is the given value of the inlet temperature of the pre-cooling medium; Q 冷 is the heat absorbed by the precooling medium; A is the effective heat exchange area of ​​the hydrogen precooling device; h 冷1 is the heat transfer coefficient between the pre-cooling medium at the inlet and the bottom wall of the flow channel; In formula 2, The calculated value of the outlet bottom wall temperature of the pre-cooling medium flow channel; T 冷2 is the outlet temperature of the pre-cooling medium; Q 冷 is the heat absorbed by the precooling medium; A is the effective heat exchange area of ​​the hydrogen precooling device; h 冷2 is the heat transfer coefficient between the pre-cooling medium at the outlet and the bottom wall of the flow channel; In formula 3, is the calculated value of the bottom wall temperature at the inlet of the hydrogen flow channel; T 氢1 is the given value of hydrogen inlet temperature; Q 氢 is the heat released by hydrogen; A is the effective heat exchange area of ​​the hydrogen precooling device; h 氢1 is the heat transfer coefficient between hydrogen at the inlet and the bottom wall of the flow channel; In formula 4, is the calculated value of the outlet bottom wall temperature of the hydrogen flow channel; T 氢2 is the given value of hydrogen outlet temperature; Q 氢 is the heat released by hydrogen; A is the effective heat exchange area of ​​the hydrogen precooling device; h 氢2 is the heat transfer coefficient between hydrogen at the outlet and the bottom wall of the flow channel.

5. The design method according to claim 3, characterized in that: The calculated pressure drop values ​​of the pre-cooling medium flow channel and the hydrogen flow channel are determined by the following method: Determining the average temperature and average pressure of the hydrogen flowing in the flow channel based on the heat transfer coefficient between the hydrogen at the inlet and outlet and the bottom wall of the flow channel, and the given values ​​of the temperature and pressure at the inlet and outlet of the hydrogen; determining the average temperature and average pressure of the precooling medium flowing in the flow channel based on the heat transfer coefficient between the precooling medium at the inlet and outlet and the bottom wall of the flow channel, and the given values ​​of the temperature and pressure at the inlet and outlet of the hydrogen; Determining an average volume flow rate and an average resistance coefficient of the precooling medium and hydrogen flowing in the flow channel based on given values ​​of target parameters of the precooling medium and hydrogen, an average temperature and an average pressure of the precooling medium and hydrogen flowing in the flow channel, and preset values ​​of structural parameters of the precooling medium flow channel and the hydrogen flow channel; The calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are determined according to Formula 5 and Formula 6: In formula 5, ΔP 冷 is the calculated value of the flow channel pressure drop of the pre-cooling medium flow channel; f 冷 is the average resistance coefficient of the pre-cooling medium flowing in the flow channel; ρ 冷 u is the density of the pre-cooling medium at the average temperature and average pressure flowing in the flow channel; 冷 is the average volume flow rate of the pre-cooling medium flowing in the flow channel; l 冷 The preset value of the flow channel length of the pre-cooling medium flow channel; d 冷 Preset value for equivalent diameter of the pre-cooling medium flow channel; In formula 6, ΔP 氢 is the calculated value of the flow channel pressure drop of the hydrogen flow channel; f 氢 is the average resistance coefficient of hydrogen flowing in the flow channel; ρ 氢 is the density of hydrogen at the average temperature and average pressure flowing in the flow channel; u 氢 is the average volume flow rate of hydrogen flowing in the flow channel; l 氢 The preset value of the hydrogen flow channel length; d 氢 Preset value for the equivalent diameter of the hydrogen flow channel.

6. The design method according to any one of claims 1 to 4, characterized in that: The preset threshold includes a first preset threshold and a second preset threshold, the first preset threshold is a value within 1% of the preset value of the bottom wall surface temperature of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, and the second preset threshold is the required flow channel pressure drop value of the pre-cooling medium flow channel and the hydrogen flow channel.

7. The design method according to claim 6, characterized in that: The determining, based on the calculated values ​​of the bottom wall temperatures at the inlets and outlets of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and a preset threshold, the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall temperatures at the inlets and outlets thereof, comprises: Determine the difference between the calculated bottom wall temperature values ​​of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel and the first preset threshold, and the difference between the calculated flow channel pressure drop values ​​of the pre-cooling medium flow channel and the hydrogen flow channel and the second preset threshold; If the calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel are within the first preset threshold range and the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel are ≤ the second preset threshold, then the preset values ​​of the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall surface temperatures at the inlet and outlet are determined to be the design values.

8. A design device for a hydrogen precooling device, characterized in that: include: An acquisition module, used for acquiring given values ​​of target parameters of the pre-cooling medium and hydrogen; The target parameters include mass flow rate, inlet and outlet temperature and pressure; A preset module, used to preset the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the bottom wall surface temperatures of the inlet and outlet according to the given values ​​of the target parameters of the pre-cooling medium and the hydrogen; The structural parameters include the equivalent diameter of the flow channel, the length of the flow channel, the thickness of the bottom wall of the flow channel, the total number of flow channels and the type of material of the flow channel plate; a calculation module, configured to determine calculated values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel and a calculated value of the flow channel pressure drop based on given values ​​of the target parameters of the precooling medium and hydrogen, preset values ​​of the structural parameters of the precooling medium flow channel and the hydrogen flow channel, and preset values ​​of the bottom wall surface temperatures at the inlet and outlet of the precooling medium flow channel and the hydrogen flow channel; a determination module, configured to determine the structural parameters of the pre-cooling medium flow channel and the hydrogen flow channel and the design values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel based on the calculated values ​​of the bottom wall surface temperatures of the inlet and outlet of the pre-cooling medium flow channel and the hydrogen flow channel, the calculated values ​​of the flow channel pressure drops of the pre-cooling medium flow channel and the hydrogen flow channel, and a preset threshold.

9. A computer device, characterized in that: include: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the design method of the hydrogen precooling device according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are executed, the computer executes the method for designing a hydrogen precooling device according to any one of claims 1 to 7.

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