Liquid hydrogen gasifier selection method, system, electronic device and storage medium

Abstract

Embodiments of the present disclosure provide a liquid hydrogen gasifier selection method, system, electronic device and storage medium. The method comprises: obtaining the most unfavorable average frost layer thermal resistance and material thermal resistance of a liquid hydrogen gasifier finned tube; obtaining the most unfavorable average composite thermal resistance of the liquid hydrogen gasifier finned tube according to the most unfavorable average frost layer thermal resistance and the material thermal resistance; establishing a liquid hydrogen gasifier simulation model according to the most unfavorable average composite thermal resistance, and simulating to obtain the gasification capacity of the liquid hydrogen gasifier; and determining whether the liquid hydrogen gasifier meets the selection requirements according to the gasification capacity. Embodiments of the present disclosure compound the static frost layer thermal resistance as an additional safety resistance value of the liquid hydrogen gasifier selection with the material thermal resistance, solve the problem of low actual heat exchange efficiency of the liquid hydrogen gasifier caused by estimation or neglect of gasifier frosting, improve the safety of gasifier operation, reduce the simulation calculation amount, and realize fast, simple and reliable selection of the liquid hydrogen gasifier.

Description

Technical Field

[0001] The embodiments disclosed herein belong to the technical field of liquid hydrogen vaporizer selection, specifically relating to a liquid hydrogen vaporizer selection method, system, electronic equipment, and storage medium. Background Technology

[0002] The entire hydrogen energy industry chain encompasses upstream hydrogen production, midstream hydrogen storage, transportation, and refueling, as well as downstream diversified applications of hydrogen. Among these, the development of the midstream chain, including pure hydrogen transportation, hydrogen storage and refueling, and the hydrogen refueling station industry, has gradually become a key focus of national energy strategy research. With hydrogen refueling stations distributed across the country on a large scale, the market demand for vaporizers, as core equipment within these stations, is increasing daily. Considering factors such as resources, cost, and maintenance, ambient air vaporizers are an important method for liquid hydrogen vaporization.

[0003] However, compared with other vaporization heat exchange media, such as LNG and liquid nitrogen, liquid hydrogen has a low density and extremely low boiling and freezing points. As a result, the surface of the liquid hydrogen vaporizer is very prone to frost formation during the vaporization process. The thickness of the frost layer and the thermal resistance change continuously with the operating time, making the actual heat transfer process of the liquid hydrogen vaporizer more complex.

[0004] Numerical simulation is generally used to study the actual heat transfer process of liquid hydrogen vaporizers. Traditional numerical models consider the dynamic frosting process to improve model accuracy, but they generally suffer from large computational loads and long calculation cycles, making them unsuitable for equipment selection and configuration in practical engineering applications. Furthermore, the lack of national and industry standards and specifications for liquid hydrogen vaporizer selection in engineering projects leaves a lack of reference points. Workers often rely on engineering experience or conventional heat exchanger calculation methods, neglecting the impact of frost thermal resistance on the vaporization capacity of the liquid hydrogen vaporizer. This leads to significant errors in vaporizer selection, affecting the actual vaporization efficiency of liquid hydrogen vaporizers in engineering projects and posing certain safety hazards during operation. Summary of the Invention

[0005] The embodiments disclosed herein are intended to at least address one of the technical problems existing in the prior art, and to provide a liquid hydrogen vaporizer selection method, system, electronic device, and storage medium.

[0006] One aspect of this disclosure provides a method for selecting a liquid hydrogen vaporizer, the method...

[0007] include:

[0008] Obtain the most unfavorable average frost thermal resistance and material thermal resistance of the liquid hydrogen vaporizer finned tube;

[0009] The most unfavorable average composite thermal resistance of the liquid hydrogen vaporizer finned tube is obtained based on the most unfavorable average frost layer thermal resistance and the material thermal resistance.

[0010] A simulation model of the liquid hydrogen vaporizer was established based on the most unfavorable average composite thermal resistance, and the vaporization capacity of the liquid hydrogen vaporizer was obtained through simulation.

[0011] The selection criteria for the liquid hydrogen vaporizer are determined based on its vaporization capacity.

[0012] Furthermore, the most unfavorable average combined thermal resistance is calculated using the following formula:

[0013]

[0014] In the formula, R c R0 represents the most unfavorable average composite thermal resistance, and R0 represents the most unfavorable average frost thermal resistance. λ represents the thermal resistance of the material, where δ represents the fin thickness of the finned tube and λ represents the thermal conductivity of the finned tube material.

[0015] Furthermore, the step of establishing a simulation model of the liquid hydrogen vaporizer based on the most unfavorable average composite thermal resistance, and simulating the vaporization capacity of the liquid hydrogen vaporizer, includes:

[0016] Obtain the air temperature, ambient wind speed, finned tube diameter, and finned tube length, and input the most unfavorable average composite thermal resistance to establish a simulation model of the liquid hydrogen vaporizer;

[0017] The gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer were obtained through simulation based on the simulation model of the liquid hydrogen vaporizer.

[0018] Further, determining whether the liquid hydrogen vaporizer meets the selection requirements based on the vaporization capacity includes:

[0019] The gas phase mass fraction and the fluid temperature are compared with the corresponding selection thresholds. If both the gas phase mass fraction and the fluid temperature are not less than the corresponding selection thresholds, then the liquid hydrogen vaporizer is determined to meet the selection requirements.

[0020] Another aspect of this disclosure provides a liquid hydrogen vaporizer selection system, the system

[0021] include:

[0022] The acquisition module is used to obtain the most unfavorable average frost thermal resistance and material thermal resistance of the liquid hydrogen vaporizer finned tube;

[0023] A composite module is used to obtain the most unfavorable average composite thermal resistance of the liquid hydrogen vaporizer finned tube based on the most unfavorable average frost thermal resistance and the material thermal resistance.

[0024] The simulation module is used to establish a simulation model of the liquid hydrogen vaporizer based on the most unfavorable average composite thermal resistance, and to simulate the vaporization capacity of the liquid hydrogen vaporizer.

[0025] The judgment module is used to determine whether the liquid hydrogen vaporizer meets the selection requirements based on the vaporization capacity.

[0026] Furthermore, the composite module is specifically used to calculate the most unfavorable average composite thermal resistance using the following formula:

[0027]

[0028] In the formula, R c R0 represents the most unfavorable average composite thermal resistance, and R0 represents the most unfavorable average frost thermal resistance. λ represents the thermal resistance of the material, where δ represents the fin thickness of the finned tube and λ represents the thermal conductivity of the finned tube material.

[0029] Furthermore, the simulation module is specifically used for:

[0030] Obtain the air temperature, ambient wind speed, finned tube diameter, and finned tube length, and input the most unfavorable average composite thermal resistance to establish a simulation model of the liquid hydrogen vaporizer;

[0031] The gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer were obtained through simulation based on the simulation model of the liquid hydrogen vaporizer.

[0032] Furthermore, the judgment module is specifically used for:

[0033] The gas phase mass fraction and the fluid temperature are compared with the corresponding selection thresholds. If both the gas phase mass fraction and the fluid temperature are not less than the corresponding selection thresholds, then the liquid hydrogen vaporizer is determined to meet the selection requirements.

[0034] Another aspect of this disclosure provides an electronic device, comprising:

[0035] At least one processor; and,

[0036] A memory communicatively connected to the at least one processor is used to store one or more programs that, when executed by the at least one processor, enable the at least one processor to implement the liquid hydrogen vaporizer selection method described above.

[0037] Another aspect of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the liquid hydrogen vaporizer selection method described above.

[0038] This disclosure discloses a liquid hydrogen vaporizer selection method, system, electronic equipment, and storage medium. Based on a combination of numerical theoretical research and experimental research, it considers the frosting problem that occurs in the actual operation of liquid hydrogen vaporizers. By increasing the static frost thermal resistance, it improves the traditional unsteady heat transfer model and defines the entire vaporizer, including the frosted and non-frosted parts, placing the finned tube heat transfer process under the most unfavorable condition. The frost thermal resistance is used as an additional safety resistance value for liquid hydrogen vaporizer selection, combined with the material thermal resistance to form the most unfavorable average composite thermal resistance. This compensates for the shortcomings of relying solely on human experience and effectively solves the problem of low actual heat exchange efficiency of liquid hydrogen vaporizers due to estimation or neglect of vaporizer frost in the prior art. It adds a safety factor to the actual vaporizer selection, reduces the difference from actual operating conditions, greatly improves the safety of vaporizer operation, and maximizes economic benefits. While considering the impact of frost thermal resistance on the vaporizer, it greatly reduces the amount of simulation calculation and shortens the operation time, realizing fast, simple, and reliable liquid hydrogen vaporizer equipment selection. Attached Figure Description

[0039] Figure 1 This is a schematic flowchart illustrating a liquid hydrogen vaporizer selection method according to an embodiment of the present disclosure.

[0040] Figure 2 This is a schematic diagram illustrating the gas phase mass fraction variation characteristics of another embodiment of the present disclosure;

[0041] Figure 3 This is a partially enlarged schematic diagram of the gas phase mass fraction change characteristics according to another embodiment of this disclosure;

[0042] Figure 4 This is a schematic diagram of the fluid temperature change characteristics according to another embodiment of the present disclosure;

[0043] Figure 5 This is a partially enlarged schematic diagram of the fluid temperature change characteristics according to another embodiment of this disclosure;

[0044] Figure 6 This is a schematic diagram of the structure of a liquid hydrogen vaporizer selection system according to another embodiment of the present disclosure;

[0045] Figure 7 This is a schematic diagram of the structure of an electronic device according to another embodiment of the present disclosure. Detailed Implementation

[0046] In the selection of vaporizers, the influence of frost thermal resistance is often ignored, which can easily lead to the selected vaporizer having a vaporization capacity that is less than the actual required vaporization capacity, posing certain safety hazards to the normal operation of the vaporizer. At the same time, traditional numerical models consider the dynamic frosting process, which involves a large amount of calculation and a long calculation cycle.

[0047] To address the aforementioned issues, embodiments of this disclosure propose a most unfavorable average thermal resistance method. This method utilizes on-site engineering measurements or experiments to determine the most unfavorable average thermal resistance corresponding to the frost layer after different operating times of an ambient temperature vaporizer. This resistance is then assigned to the material properties of the liquid hydrogen vaporizer fins in numerical simulations, improving the heat transfer model for simulation calculations. This approach transforms the problem of localized dynamic frosting into a static heat transfer problem of overall frosting of the liquid hydrogen vaporizer, thereby calculating the vaporization capacity of the liquid hydrogen vaporizer under different frost layer conditions. This method reduces the complexity of numerical simulations, narrows the gap between the model and actual operating conditions, and achieves rapid and simple selection while maintaining a certain level of reliability. By utilizing engineering or experimental measured values, the heat transfer process of the finned tubes is placed under the most unfavorable conditions, increasing the safety factor for liquid hydrogen vaporizer selection, improving the safety of vaporizer operation, and ensuring that the simplified selection of liquid hydrogen vaporizers meets practical engineering requirements.

[0048] The technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this disclosure, and not all embodiments. Based on the embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0049] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0050] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0051] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of this disclosure. As used in this disclosure, the term "and / or" includes all combinations of any and more of the associated listed items.

[0052] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily necessary for implementing this disclosure, and therefore cannot be used to limit the scope of protection of this disclosure.

[0053] like Figure 1 As shown, one embodiment of this disclosure provides a method for selecting a liquid hydrogen vaporizer, the method comprising:

[0054] Step S1: Obtain the most unfavorable average frost thermal resistance and material thermal resistance of the liquid hydrogen vaporizer finned tube.

[0055] Specifically, numerical theoretical research is combined with experimental research. The thickness of the frost layer on the surface of the vaporizer is measured through engineering field tests or experiments to obtain the most unfavorable average frost layer thermal resistance within a certain length of pipe section corresponding to the frost layer thickness under the most unfavorable operating conditions. For example, the average frost layer thermal resistance of the finned tube within 8m from the vaporizer inlet under the condition of the thickest frost layer. At the same time, the material thermal resistance of the finned tube to be selected is obtained. In some embodiments, the material thermal resistance of the finned tube can be obtained by dividing the fin thickness of the finned tube by its material thermal conductivity.

[0056] Step S2: Based on the most unfavorable average frost layer thermal resistance and the material thermal resistance, obtain the most unfavorable average composite thermal resistance of the liquid hydrogen vaporizer finned tube.

[0057] Specifically, by combining the frost thermal resistance corresponding to engineering or experimental measurement data with the material properties of the gasifier finned tube through heat transfer calculations, a composite thermal resistance value is formed. This simplifies the complex dynamic frost problem into a static heat transfer problem and transforms the traditional local frost problem into a gasifier overall frost problem, thereby obtaining a most unfavorable average composite thermal resistance. This solves the problems of large calculation volume and long calculation cycle in the existing technology when the gasifier frost situation is not considered or the dynamic frost process is considered.

[0058] The most unfavorable average combined thermal resistance is calculated using the following formula:

[0059]

[0060] In the formula, R c R0 represents the most unfavorable average composite thermal resistance, and R0 represents the most unfavorable average frost thermal resistance. λ represents the thermal resistance of the material, where δ represents the fin thickness of the finned tube and λ represents the thermal conductivity of the finned tube material.

[0061] Step S3: Establish a simulation model of the liquid hydrogen vaporizer based on the most unfavorable average composite thermal resistance, and simulate the vaporization capacity of the liquid hydrogen vaporizer.

[0062] Specifically, environmental parameters such as air temperature and ambient wind speed, and structural parameters such as finned tube diameter and length are obtained. A geometric model of a single finned tube is established based on the actual design dimensions of the liquid hydrogen vaporizer. Then, the most unfavorable average composite thermal resistance obtained in step S2 above is used as a material property. A simulation model of the liquid hydrogen vaporizer is established using a single finned tube of an air-temperature vaporizer as the research object. Subsequently, a fluid-structure interaction heat transfer study is conducted on the single finned tube model of the liquid hydrogen vaporizer using numerical simulation. The entire heat exchange process of the liquid hydrogen vaporizer is simulated and analyzed through simulation calculations. In the simulation results, the gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer are used as evaluation indicators of vaporization capacity.

[0063] To ensure the reliability of the liquid hydrogen vaporizer selection method in this embodiment, the thermal resistance corresponding to the frost layer thickness at different operating times is determined by on-site engineering testing or experiments. The frost layer thermal resistance is used as an additional safety resistance value for liquid hydrogen vaporizer selection. This resistance is combined with the material thermal resistance of the vaporizer to form the most unfavorable average composite thermal resistance. The entire vaporizer is defined, including both frosted and non-frosted sections, so that the finned tube heat transfer process is under the most unfavorable condition. This solves the problem of low actual heat exchange efficiency of liquid hydrogen vaporizers in the prior art due to estimation or neglect of vaporizer frost and other factors.

[0064] As a specific embodiment, under the condition that the environmental and structural parameters remain unchanged, based on the frost thermal resistance value corresponding to the frost thickness determined by engineering measurements or experiments, and taking a single finned tube of an ambient air vaporizer as the research object, simulations were conducted for two types of operating conditions: considering and not considering the frost thermal resistance. The four sets of operating parameters shown in Table 1 below were designed:

[0065] Table 1

[0066]

[0067]

[0068] Using gas phase mass fraction and fluid temperature as evaluation indicators of vaporization capacity, and taking the first to fourth finned tubes within 8m of the liquid hydrogen vaporizer inlet as examples, simulations were conducted for the above four operating conditions. The vaporization capacity of the vaporizer under these four conditions was compared and analyzed. Specifically, the variation characteristics of gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer under different operating conditions were analyzed, clarifying the relationship between frost thermal resistance and the vaporization capacity of the liquid hydrogen vaporizer, providing an important reference for the selection of liquid hydrogen vaporizers. The simulation results are as follows:

[0069] The gas phase mass fraction variation characteristics at the outlet positions of the first to fourth finned tubes of the vaporizer are as follows: Figure 2 and its local magnification Figure 3 As shown. By Figure 2It can be seen that under various operating conditions, the mass fraction of the gas phase in the vaporizer gradually increases along the direction away from the vaporizer inlet, and the vaporization effect is more significant closer to the inlet. Meanwhile, from... Figure 2 It can be seen that under operating condition 1 (without frost thermal resistance), the increase in gas phase mass fraction inside the vaporizer finned tube is greater than in the other three operating conditions. Furthermore, at a distance of 8m from the inlet, i.e., at the 5th finned tube, the gas phase mass fraction already reaches over 97%. The difference in gas phase mass fraction between operating condition 1 and the other three operating conditions is significant, approximately 1.3 times that of the other three conditions. Figure 3 It can be seen that at a distance of 8m from the inlet, the gas phase mass fraction under operating conditions 2, 3, and 4 is approximately 74.9%, 76.2%, and 73.9%, respectively. The gas phase mass fraction in the vaporizer decreases slightly with increasing thermal resistance. The fluid temperature variation characteristics inside the first to fourth finned tubes of the vaporizer are as follows: Figure 4 and its local magnification Figure 5 As shown. By Figure 4 It can be seen that the temperature change of the fluid inside the vaporizer gradually increases along the direction away from the inlet, and the temperature rise is greater closer to the inlet. Meanwhile, from... Figure 4 It can be seen that under operating condition 1, i.e., without frost thermal resistance, the overall fluid temperature inside the vaporizer finned tube is higher than that under the other three operating conditions. Furthermore, at a distance of 8m from the inlet, the fluid temperature in operating condition 1 is approximately 3.5 times that of the other three operating conditions. Figure 4 It can be seen that the fluid temperatures under operating conditions 2, 3 and 4 are approximately 52.5K, 54.9K and 50.9K respectively, and the fluid temperature inside the vaporizer decreases as the thermal resistance increases.

[0070] In summary, considering the characteristics of gas phase mass fraction and fluid temperature changes in the finned tubes of the vaporizer, it can be seen that liquid hydrogen continuously vaporizes as it flows into the finned tubes, with the gas phase mass fraction and temperature continuously increasing. The vaporization capacity decreases as the thermal resistance of the frost layer increases. Under the same environmental and structural parameters, operating condition 1 (without considering frost) has a significant impact on the vaporizer's vaporization capacity, and the vaporization process is faster compared to the actual frosting conditions during operation. Therefore, considering only the ideal case without frost layer thermal resistance would have a significant negative impact on the selection of the vaporizer. The simulation using the most unfavorable average thermal resistance heat transfer model yielded good results, and the simulation results conform to objective laws and existing experimental patterns, demonstrating a certain degree of reliability.

[0071] Step S4: Determine whether the liquid hydrogen vaporizer meets the selection requirements based on the vaporization capacity.

[0072] Specifically, the gas phase mass fraction and the fluid temperature are compared with corresponding selection thresholds. First, the gas phase mass fraction threshold and fluid temperature threshold are preset as needed, such as 75% and 50K. Then, the simulated gas phase mass fraction of the liquid hydrogen vaporizer is compared to whether it is greater than or equal to 75%, and the fluid temperature is greater than or equal to 50K. If both the gas phase mass fraction and the fluid temperature are not less than the corresponding selection thresholds, the liquid hydrogen vaporizer is deemed to meet the selection requirements. Conversely, if the gas phase mass fraction is less than 75% or the fluid temperature is less than 50K, the liquid hydrogen vaporizer is deemed not to meet the selection requirements.

[0073] This disclosure discloses a liquid hydrogen vaporizer selection method. Based on a combination of numerical theoretical research and experimental research, it considers the frosting problem that occurs in the actual operation of liquid hydrogen vaporizers. By increasing the static frost thermal resistance, it improves the traditional unsteady heat transfer model and defines the entire vaporizer, including the frosted and non-frosted parts, so that the finned tube heat transfer process is under the most unfavorable condition. The frost thermal resistance is used as an additional safety resistance value for liquid hydrogen vaporizer selection and combined with the material thermal resistance to form the most unfavorable average composite thermal resistance. This method compensates for the shortcomings of relying solely on human experience and effectively solves the problem of low actual heat exchange efficiency of liquid hydrogen vaporizers due to estimation or neglect of vaporizer frosting in the prior art. It adds a safety factor to the actual vaporizer selection, reduces the difference from actual operating conditions, greatly improves the safety of vaporizer operation, and maximizes economic benefits. While considering the impact of frost thermal resistance on the vaporizer, it greatly reduces the amount of simulation calculation and shortens the operation time, realizing fast, simple, and reliable liquid hydrogen vaporizer equipment selection.

[0074] like Figure 6 As shown, another embodiment of this disclosure provides a liquid hydrogen vaporizer selection system, the system comprising:

[0075] The acquisition module 610 is used to acquire the most unfavorable average frost thermal resistance and material thermal resistance of the liquid hydrogen vaporizer finned tube.

[0076] Composite module 620 is used to obtain the most unfavorable average composite thermal resistance of the liquid hydrogen vaporizer finned tube based on the most unfavorable average frost thermal resistance and the material thermal resistance.

[0077] Simulation module 630 is used to establish a simulation model of the liquid hydrogen vaporizer based on the most unfavorable average composite thermal resistance, and to simulate the vaporization capacity of the liquid hydrogen vaporizer.

[0078] The judgment module 640 is used to determine whether the liquid hydrogen vaporizer meets the selection requirements based on the vaporization capacity.

[0079] For example, the composite module is specifically used to calculate the most unfavorable average composite thermal resistance using the following formula:

[0080]

[0081] In the formula, R c R0 represents the most unfavorable average composite thermal resistance, and R0 represents the most unfavorable average frost thermal resistance. λ represents the thermal resistance of the material, where δ represents the fin thickness of the finned tube and λ represents the thermal conductivity of the finned tube material.

[0082] For example, the simulation module is specifically used for:

[0083] Obtain the air temperature, ambient wind speed, finned tube diameter, and finned tube length, and input the most unfavorable average composite thermal resistance to establish a simulation model of the liquid hydrogen vaporizer;

[0084] The gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer were obtained through simulation based on the simulation model of the liquid hydrogen vaporizer.

[0085] For example, the determination module is specifically used for:

[0086] The gas phase mass fraction and the fluid temperature are compared with the corresponding selection thresholds. If both the gas phase mass fraction and the fluid temperature are not less than the corresponding selection thresholds, then the liquid hydrogen vaporizer is determined to meet the selection requirements.

[0087] Specifically, a liquid hydrogen vaporizer selection system according to an embodiment of this disclosure is used to implement the liquid hydrogen vaporizer selection method described in the above embodiments. The specific implementation process has been described in detail in the above embodiments and will not be repeated here.

[0088] This disclosure discloses a liquid hydrogen vaporizer selection system. Based on a combination of numerical theoretical research and experimental research, it considers the frosting problem that occurs in the actual operation of liquid hydrogen vaporizers. By increasing the static frost thermal resistance, it improves the traditional unsteady heat transfer model and defines the entire vaporizer, including the frosted and non-frosted parts, placing the finned tube heat transfer process under the most unfavorable condition. The frost thermal resistance is used as an additional safety resistance value for liquid hydrogen vaporizer selection, combined with the material thermal resistance to form the most unfavorable average composite thermal resistance. This compensates for the shortcomings of relying solely on human experience and effectively solves the problem of low actual heat exchange efficiency of liquid hydrogen vaporizers due to estimation or neglect of vaporizer frosting in the prior art. It adds a safety factor to the actual vaporizer selection, reduces the difference from actual operating conditions, greatly improves the safety of vaporizer operation, and maximizes economic benefits. While considering the impact of frost thermal resistance on the vaporizer, it greatly reduces the amount of simulation calculation and shortens the operation time, realizing fast, simple, and reliable liquid hydrogen vaporizer equipment selection.

[0089] like Figure 7 As shown, another embodiment of this disclosure provides an electronic device, including:

[0090] At least one processor 701; and a memory 702 communicatively connected to the at least one processor 701 for storing one or more programs that, when executed by the at least one processor 701, enable the at least one processor 701 to implement the liquid hydrogen vaporizer selection method described above.

[0091] The memory 702 and processor 701 are connected via a bus, which can include any number of interconnecting buses and bridges. The bus connects various circuits of one or more processors 701 and memory 702 together. The bus can also connect various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. A bus interface provides an interface between the bus and the transceiver. The transceiver can be a single element or multiple elements, such as multiple receivers and transmitters, providing a unit for communicating with various other devices over a transmission medium. Data processed by processor 701 is transmitted over a wireless medium via an antenna, which further receives data and transmits it to processor 701.

[0092] Processor 701 is responsible for managing the bus and general processing, and can also provide various functions, including timing, peripheral interfaces, voltage regulation, power management, and other control functions. Memory 702 can be used to store data used by processor 701 during operation.

[0093] Another embodiment of this disclosure provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the liquid hydrogen vaporizer selection method described above.

[0094] The computer-readable storage medium may be included in the systems or electronic devices disclosed herein, or it may exist independently.

[0095] Computer-readable storage media can be any tangible medium that contains or stores a program, and can be an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device. More specific examples include, but are not limited to: electrical connections having one or more wires, portable computer disks, hard disks, optical fibers, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0096] Computer-readable storage media may also include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code, specific examples of which include, but are not limited to, electromagnetic signals, optical signals, or any suitable combination thereof.

[0097] It is understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of this disclosure, and this disclosure is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and substance of this disclosure, and these modifications and improvements are also considered to be within the scope of protection of this disclosure.

Claims

1. A method for selecting a liquid hydrogen vaporizer, characterized in that, The method includes: Obtain the most unfavorable average frost thermal resistance and material thermal resistance of the liquid hydrogen vaporizer finned tube; The most unfavorable average composite thermal resistance of the liquid hydrogen vaporizer finned tube is obtained based on the most unfavorable average frost layer thermal resistance and the material thermal resistance. A simulation model of the liquid hydrogen vaporizer was established based on the most unfavorable average composite thermal resistance, and the vaporization capacity of the liquid hydrogen vaporizer was obtained through simulation. The selection criteria for the liquid hydrogen vaporizer are determined based on its vaporization capacity.

2. The method according to claim 1, characterized in that, The most unfavorable average combined thermal resistance is calculated using the following formula: In the formula, R c R0 represents the most unfavorable average composite thermal resistance, and R0 represents the most unfavorable average frost thermal resistance. λ represents the thermal resistance of the material, where δ represents the fin thickness of the finned tube and λ represents the thermal conductivity of the finned tube material.

3. The method according to claim 1, characterized in that, The simulation model of the liquid hydrogen vaporizer is established based on the most unfavorable average composite thermal resistance, and the vaporization capacity of the liquid hydrogen vaporizer is obtained through simulation, including: Obtain the air temperature, ambient wind speed, finned tube diameter, and finned tube length, and input the most unfavorable average composite thermal resistance to establish a simulation model of the liquid hydrogen vaporizer; The gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer were obtained through simulation based on the simulation model of the liquid hydrogen vaporizer.

4. The method according to claim 3, characterized in that, The step of determining whether the liquid hydrogen vaporizer meets the selection requirements based on the vaporization capacity includes: The gas phase mass fraction and the fluid temperature are compared with the corresponding selection thresholds. If both the gas phase mass fraction and the fluid temperature are not less than the corresponding selection thresholds, then the liquid hydrogen vaporizer is determined to meet the selection requirements.

5. A liquid hydrogen vaporizer selection system, characterized in that, The system includes: The acquisition module is used to obtain the most unfavorable average frost thermal resistance and material thermal resistance of the liquid hydrogen vaporizer finned tube; A composite module is used to obtain the most unfavorable average composite thermal resistance of the liquid hydrogen vaporizer finned tube based on the most unfavorable average frost thermal resistance and the material thermal resistance. The simulation module is used to establish a simulation model of the liquid hydrogen vaporizer based on the most unfavorable average composite thermal resistance, and to simulate the vaporization capacity of the liquid hydrogen vaporizer. The judgment module is used to determine whether the liquid hydrogen vaporizer meets the selection requirements based on the vaporization capacity.

6. The system according to claim 5, characterized in that, The composite module is specifically used to calculate the most unfavorable average composite thermal resistance using the following formula: In the formula, R c R0 represents the most unfavorable average composite thermal resistance, and R0 represents the most unfavorable average frost thermal resistance. λ represents the thermal resistance of the material, where δ represents the fin thickness of the finned tube and λ represents the thermal conductivity of the finned tube material.

7. The system according to claim 5, characterized in that, The simulation module is specifically used for: Obtain the air temperature, ambient wind speed, finned tube diameter, and finned tube length, and input the most unfavorable average composite thermal resistance to establish a simulation model of the liquid hydrogen vaporizer; The gas phase mass fraction and fluid temperature of the liquid hydrogen vaporizer were obtained through simulation based on the simulation model of the liquid hydrogen vaporizer.

8. The system according to claim 7, characterized in that, The judgment module is specifically used for: The gas phase mass fraction and the fluid temperature are compared with the corresponding selection thresholds. If both the gas phase mass fraction and the fluid temperature are not less than the corresponding selection thresholds, then the liquid hydrogen vaporizer is determined to meet the selection requirements.

9. An electronic device, characterized in that, include: At least one processor; as well as, A memory communicatively connected to the at least one processor is used to store one or more programs that, when executed by the at least one processor, enable the at least one processor to implement the liquid hydrogen vaporizer selection method according to any one of claims 1 to 4.

10. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the liquid hydrogen vaporizer selection method according to any one of claims 1 to 4.

Images