Cold energy coupling control method and device for liquid hydrogen refueling station and electronic equipment

Abstract

The embodiment of the invention discloses a cold energy coupling control method and device of a liquid hydrogen refueling station and electronic equipment. The method comprises the following steps: determining heat exchange efficiency data of each hydrogenation associated device in the liquid hydrogen refueling station; and respectively calculating the cold energy release energy of the liquid hydrogen refueling station in the liquid hydrogen vaporization process and the cold energy use energy of the liquid hydrogen refueling station in the hydrogen filling process based on the preset vaporized liquid hydrogen mass. And the first product value and the cold energy use energy are compared, the working state of a refrigerating unit of the pre-cooling device in the hydrogen filling process is set according to the comparison result, and the hydrogen filling process is pre-cooled based on the cold storage device and the refrigerating unit. According to the embodiment of the invention, through conversion of heat exchange efficiency data, actually available cold energy and cold energy required to be used in a filling process under the condition of consuming liquid hydrogen with the same mass are compared, and the working state of the refrigerating unit is dynamically adjusted according to a comparison result, so that the cold energy generated by vaporization is preferentially consumed, the energy consumption of the refrigerating unit is reduced, and the working efficiency of the refrigerating unit is improved. The pre-cooling energy consumption of hydrogen filling is saved.

Description

Technical Field

[0001] The embodiments of this specification belong to the field of hydrogen refueling station coupling control, and particularly relate to a cold energy coupling control method, device, and electronic device for a liquid hydrogen refueling station. Background Art

[0002] A hydrogen refueling station is a site that provides hydrogen to fuel cell vehicles. During the high-pressure hydrogen refueling process, due to the Joule-Thomson effect of hydrogen, the hydrogen in the on-vehicle hydrogen storage bottle group of the fuel cell vehicle will rapidly heat up, posing a serious safety hazard to the on-vehicle hydrogen storage bottle group. Currently, a method of pre-cooling the refueled hydrogen with a refrigerant is usually used to control the hydrogen temperature during the refueling process and ensure refueling safety. However, such a method requires a large amount of electrical energy for hydrogen pre-cooling, resulting in high energy consumption. Summary of the Invention

[0003] The embodiments of the present disclosure provide a cold energy coupling control method, device, and electronic device for a liquid hydrogen refueling station, aiming to solve one or more of the above problems and other potential problems.

[0004] According to a first aspect of the present disclosure, a cold energy coupling control method for a liquid hydrogen refueling station is provided. The method includes determining heat exchange efficiency data of each hydrogen refueling related device in the liquid hydrogen refueling station. The hydrogen refueling related devices include a cold energy storage device for storing the cold energy generated by the vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a pre-cooling device for pre-cooling a hydrogen refueling machine. The method further includes calculating, based on a preset mass of vaporized liquid hydrogen, the cold energy release energy during the liquid hydrogen vaporization process and the cold energy usage energy during the hydrogen refueling process in the liquid hydrogen refueling station. In addition, the method further includes comparing a first product value and the cold energy usage energy, and setting the working state of the refrigeration unit of the pre-cooling device during the hydrogen refueling process according to the comparison result, so as to pre-cool the hydrogen refueling process based on the cold energy storage device and the refrigeration unit. The first product value is the product value between the heat exchange efficiency data and the cold energy release energy.

[0005] According to a second aspect of the present disclosure, there is provided a cold energy coupling control device for a liquid hydrogen refueling station. The device includes a heat exchange efficiency processing module configured to determine heat exchange efficiency data of each hydrogen refueling related device in the liquid hydrogen refueling station. The hydrogen refueling related devices include a cold energy storage device for storing the cold energy generated by the vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a precooling device for precooling a hydrogen dispenser. The device further includes a cold energy processing module configured to calculate, based on a preset mass of vaporized liquid hydrogen, the cold energy release energy during the liquid hydrogen vaporization process and the cold energy usage energy during the hydrogen refueling process in the liquid hydrogen refueling station. In addition, the device further includes a precooling module configured to compare a first product value with the cold energy usage energy, and set the operating state of the refrigeration unit of the precooling device during the hydrogen refueling process according to the comparison result, so as to precool the hydrogen refueling process based on the cold energy storage device and the refrigeration unit. The first product value is the product value between the heat exchange efficiency data and the cold energy release energy.

[0006] According to a third aspect of the present disclosure, there is provided an electronic device. The electronic device includes one or more processors, and a memory associated with the one or more processors. The memory is used to store program instructions, and when the program instructions are read and executed by the one or more processors, the method provided according to the first aspect is executed.

[0007] According to a fourth aspect of the present disclosure, there is provided a computer program product. The product includes a computer program, and when the computer program is executed by a processor, the method provided according to the first aspect is implemented.

[0008] It should be understood that the content described in the summary of the invention section is not intended to limit the key or important features of the embodiments of the present disclosure, nor to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] In combination with the accompanying drawings and with reference to the following detailed description, the above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent. In the drawings, the same or similar reference numerals denote the same or similar elements, where: Figure 1 A schematic diagram of an example environment in which multiple embodiments of the present disclosure can be implemented is shown; Figure 2 A flowchart of a cold energy coupling control method for a liquid hydrogen refueling station according to some embodiments of the present disclosure is shown; Figure 3 A flowchart of a comparison process between a first product value and cold energy usage energy according to some embodiments of the present disclosure is shown; Figure 4 A flowchart of a determination process of a first flow rate and a second flow rate according to some embodiments of the present disclosure is shown; Figure 5The schematic diagram of the system structure of a liquid hydrogen refueling station system showing some embodiments of the present disclosure; Figure 6 The schematic diagram of the system structure of another liquid hydrogen refueling station system showing some embodiments of the present disclosure; Figure 7 The schematic diagram of the structure of the cold energy coupling control device of the liquid hydrogen refueling station showing some embodiments of the present disclosure; Figure 8 The schematic block diagram of an electronic device showing some embodiments of the present disclosure. Detailed implementation manners

[0010] To make the objectives, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present specification will be clearly and completely described below in conjunction with the corresponding drawings in the embodiments of the present specification. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present application.

[0011] Terms such as "including" and "having" and any variations thereof in this specification, the claims and the above-mentioned drawings are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally further includes steps or units not listed, or optionally further includes other steps or units inherent to these processes, methods, products or devices. Depending on the context, the word "if" as used herein may be interpreted as "when", "while" or "in response to determining" or "in response to detecting".

[0012] As mentioned above, compared with high-pressure gaseous hydrogen refueling stations, liquid hydrogen refueling stations have advantages such as small floor area, good hydrogen purity, and high in-station efficiency. Moreover, liquid hydrogen refueling stations can provide both liquid hydrogen and high-pressure hydrogen refueling, which are suitable for various types of hydrogen fuel cell vehicles, resulting in an increase in the number of current liquid hydrogen refueling stations. During the hydrogen refueling process, due to the Joule-Thomson effect of hydrogen, the hydrogen in the on-vehicle hydrogen storage bottle group of the fuel cell vehicle will rapidly heat up, which will bring serious safety hazards to the on-vehicle hydrogen storage bottle group. Therefore, in practical applications, a refrigerant is usually used to pre-cool the refueling hydrogen. Usually, the temperature of the hydrogen storage tank is maintained at 30 degrees Celsius. Before refueling hydrogen, the hydrogen needs to be pre-cooled, and the lowest can reach -40 degrees Celsius. For this reason, the refrigeration unit needs to consume a certain amount of electric energy to achieve the pre-cooling of hydrogen refueling. During the hydrogen refueling process, the faster the refueling speed, the faster the temperature of the on-vehicle hydrogen storage bottle group rises. Therefore, it is necessary to control the temperature of the hydrogen during the refueling process to ensure refueling safety, which inevitably requires a large amount of electric energy for hydrogen pre-cooling, resulting in a large energy consumption of the refueling station.

[0013] In response to this, an embodiment of the present disclosure proposes a cold energy coupling control method for a liquid hydrogen refueling station. In the embodiment of the present disclosure, the method determines whether to pre-cool hydrogen refueling by using the cold energy generated by liquid hydrogen vaporization or to pre-cool hydrogen refueling by using the cold energy generated by liquid hydrogen vaporization and the cold energy generated by a refrigeration unit by comparing the magnitude of the cold energy release energy after heat exchange (i.e., the first product value determined based on the heat exchange efficiency data and the cold energy release energy) and the cold energy usage energy.

[0014] Through the above method, the present application can dynamically adjust the cold energy supply object required for hydrogen refueling pre-cooling according to the cold energy usage of the liquid hydrogen output to the pipeline before pre-cooling and the energy change after heat exchange of the cold energy released during the liquid hydrogen vaporization process between devices, so as to pre-cool in combination with a refrigeration unit according to the cold energy stored in the cold storage device, rather than relying entirely on the refrigeration unit for pre-cooling. In some cases, pre-cooling can be achieved without using the refrigeration unit, realizing the coupled utilization of wasted high-quality cold energy and significantly reducing the energy consumption of the refueling station system.

[0015] Figure 1 FIG. shows a schematic diagram of an example environment 100 in which multiple embodiments of the present disclosure can be implemented. As Figure 1As shown, the environment 100 may include a terminal 110, a liquid hydrogen tank 120, a liquid hydrogen pump 130, a vaporizer 140, a gaseous hydrogen tank 150, a first circulation pump 160-1, a second circulation pump 160-2, a cold storage device 170, a precooling device 180, and a hydrogen filling machine 190. The liquid hydrogen in the liquid hydrogen tank 120 can be transported into the vaporizer 140 under the action of the liquid hydrogen pump 130, and undergoes heat exchange with air in the vaporizer 140 to vaporize. The vaporized hydrogen can be directly transported to the hydrogen filling machine 190 for hydrogen filling, or can first be stored in the gaseous hydrogen tank 150 and then transported from the gaseous hydrogen tank 150 to the hydrogen filling machine 190 when hydrogen filling is required. When the first circulation pump 160-1 is working, it can transport the circulating medium capable of absorbing cold energy in the cold storage device 170 to the vaporizer 140, so that the circulating medium can absorb the cold energy generated by the vaporization of liquid hydrogen and transport the cold energy to the cold storage device 170 for storage. The second circulation pump 160-2 can also transport the cold energy stored in the cold storage device 170 to the precooling device 180 by transporting the circulating medium to the precooling device 180 for heat exchange, so that the precooling device 180 can use this part of the cold energy to precool the hydrogen filling machine 190. The circulating medium can be selected from media that will not become solid at low temperatures, such as ethylene glycol solution, propylene glycol solution, ethanol, ammonia water solution, lithium bromide solution, etc. A precooling unit can also be provided in the precooling device 180. When the cold energy stored in the cold storage device 170 is not sufficient to meet the precooling requirement, the precooling can be achieved by consuming electrical energy through the precooling unit. One or more circulation pumps can be provided. When only one circulation pump is provided, the circulation pump can be responsible for the transportation cycle of the circulating medium from the cold storage device 170 to the vaporizer 140 and the transportation cycle of the circulating medium from the cold storage device 170 to the precooling device 180 at the same time. When multiple circulation pumps 160 are provided, as shown in the environment 100, each circulation pump 160 is respectively responsible for one transportation cycle. The terminal 110 can be any device with computing or processing capabilities. For example, the terminal 110 can include, but is not limited to, mobile phones, tablets, desktop computers, servers, etc. The terminal 110 can be communicatively connected to the liquid hydrogen tank 120, the liquid hydrogen pump 130, the vaporizer 140, the circulation pump 160, the cold storage device 170, and the precooling device 180 respectively to achieve data collection and interaction with the corresponding devices. The terminal 110 can compare the cold energy release energy 111 and the cold energy usage energy 112 generated by the hydrogen filling station through the comparison unit 113 to generate a comparison result 114. The first control unit 115 of the terminal 110 can generate a cooling supply instruction 116 according to the comparison result 114 and control the working states of the cold storage device 170 and the precooling device 180 through the cooling supply instruction 116.

[0016] Figure 2The flowchart shows the cold energy coupling control method 200 of a liquid hydrogen refueling station according to some embodiments of the present disclosure. The method 200 can be executed by the terminal 110, for example. As Figure 2 shown, at block 202, the method 200 can determine the heat exchange efficiency data of each hydrogen refueling related device in the liquid hydrogen refueling station. The hydrogen refueling related devices include a cold energy storage device for storing the cold energy generated by the vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a pre-cooling device for pre-cooling the hydrogen dispenser. In this embodiment, during the process of energy transfer between various devices in the refueling station, there will inevitably be certain losses. In order to accurately determine the available cold energy in the refueling station, it is first necessary to determine the heat exchange efficiency data of each hydrogen refueling related device related to the cold energy transfer process in the refueling station. Cold energy is generally first generated from the vaporized liquid hydrogen in the vaporizer, then transported to the cold energy storage device for storage, and finally transported to the pre-cooling device for pre-cooling. Therefore, the hydrogen refueling related devices need to include at least a cold energy storage device, a vaporizer, and a pre-cooling device. As an example, the heat exchange efficiency of a device is related to the model of the device. That is, after the model is determined, the heat exchange efficiency of the device is also determined. And as a kind of device parameter, the heat exchange efficiency generally needs to be tested and calculated before the device leaves the factory. Therefore, the device models of each hydrogen refueling related device can be directly obtained, and then the device parameters of the corresponding devices can be queried through the device models, and the heat exchange efficiency data of the device can be queried in the device parameters.

[0017] At block 204, the method 200 can calculate the cold energy release energy during the liquid hydrogen vaporization process and the cold energy usage energy during the hydrogen refueling process in the liquid hydrogen refueling station based on a preset mass of vaporized liquid hydrogen. In this embodiment, a mass of vaporized liquid hydrogen required for calculating cold energy can be preset in advance. This mass of vaporized liquid hydrogen is used to represent how much mass of liquid hydrogen is consumed for vaporization. The specific value of this mass of vaporized liquid hydrogen can be set according to the actual situation. It is mainly necessary to ensure that the cold energy release energy and the cold energy usage energy are calculated using the same mass of vaporized liquid hydrogen, so as to facilitate subsequent comparison of the magnitudes of the cold energy generated by the same mass of liquid hydrogen and the cold energy required for refueling. Then, the cold energy release energy during the liquid hydrogen vaporization process and the cold energy usage energy consumed for pre-cooling during the hydrogen refueling process are calculated respectively through this mass of vaporized liquid hydrogen. As an example, the cold energy release energy can include the heat absorbed during the liquid hydrogen temperature rise process and the heat absorbed during the phase change process. In addition, in order to make full use of cold energy, the energy required for the liquid hydrogen pump and the circulation pump can also be provided by cold energy. Therefore, the cold energy usage energy can include the energy consumed by the liquid hydrogen pump for transporting liquid hydrogen, the energy consumed by the circulation pump for transporting the circulation medium absorbing cold energy, and the heat released when the vaporized hydrogen is cooled to a temperature meeting the refueling requirements.

[0018] At block 206, method 200 may compare the first product value and the cold energy used energy, and set the working state of the refrigeration unit of the precooling device during the hydrogen refueling process according to the comparison result, so as to pre-cool the hydrogen refueling process based on the cold storage device and the refrigeration unit. The first product value is the product value between the heat exchange efficiency data and the cold energy release energy. In this embodiment, in order to actually utilize the cold energy generated by the vaporization of liquid hydrogen, it is necessary to transfer the cold energy between devices, and a part of the loss is generated due to the heat exchange efficiency problem. Therefore, the first product value can be calculated by multiplying the heat exchange efficiency data by the cold energy release energy, and the first product value can represent the part of the generated cold energy that can be actually used. By comparing the first product value with the cold energy used energy, it can be determined whether the cold energy generated by the vaporization of the same mass of liquid hydrogen can meet the cold energy consumed during the refueling process of this part of the mass of hydrogen, and further it can be determined whether it is necessary to generate additional cold energy through the precooling unit to meet the cold energy usage requirements. Finally, the working state of the refrigeration unit during the hydrogen refueling process will be set accordingly according to the comparison result, so that the liquid hydrogen refueling station can control the cold storage device to pre-cool according to its own cold energy generation and usage conditions, or pre-cool simultaneously through the cold storage device and the refrigeration unit, realizing the coupled utilization of the high-quality cold energy wasted during the liquid hydrogen vaporization process, and significantly reducing the energy consumption of the refueling station system.

[0019] Figure 3 The flow diagram of the comparison process 300 of the first product value and the cold energy used energy of some embodiments of the present disclosure is shown, as Figure 3 shown. This process 300 may include calculating the cold energy release energy 320 of the liquid hydrogen refueling station during the liquid hydrogen vaporization process based on the summation of the second product value 310 between the preset vaporized liquid hydrogen mass and the latent heat of vaporization of liquid hydrogen, and the third product value 311 between the vaporized liquid hydrogen mass and the first heat change value. The first heat change value is the heat absorption value per unit mass of hydrogen during the process of liquid hydrogen from the liquefaction temperature to the storage tank temperature. This process 300 may also calculate the cold energy used energy 112 of the liquid hydrogen refueling station during the hydrogen refueling process based on the summation of the first energy 350 required for the liquid hydrogen pump to flow through the vaporized liquid hydrogen, the second energy 351 of the circulating medium required for the circulation pump to transport the vaporized liquid hydrogen to flow through, and the fourth product value 352 between the vaporized liquid hydrogen mass and the second heat change value. The second heat change value is the heat absorption value per unit mass of hydrogen during the process of liquid hydrogen from the precooling temperature to the storage tank temperature. In this embodiment, the formula for the cold energy release energy can be: where is the latent heat of vaporization of liquid hydrogen, that is, the heat absorbed during the phase change process of liquid hydrogen from liquid to gas while the temperature remains constant. is the preset vaporized liquid hydrogen mass, is the liquefaction temperature of liquid hydrogen, is the temperature of the storage tank filled with liquefied liquid hydrogen, is the specific heat capacity of hydrogen at constant pressure.

[0020] Cold energy utilization energy The calculation formula can be: where, is the energy required for flowing through each kilogram of liquid hydrogen, is the energy required for the first circulation pump to flow through each kilogram of circulating medium, is for the first circulation pump to flow through the mass of the circulating medium required for the liquid hydrogen to flow, is the energy required for the second circulation pump to flow through each kilogram of circulating medium, is for the second circulation pump to flow through the mass of the circulating medium required for the liquid hydrogen to flow, is the pre-cooling temperature required for hydrogen filling.

[0021] , and are all specific energies , that is, the energy consumption per unit mass of fluid, which can be calculated by the following formula: where, is the power of the pump, is the density of the medium, is the acceleration of gravity, is the flow rate, is the head, is the efficiency of the pump, and the specific value of the efficiency can be determined by querying the flow rate-efficiency characteristic curve of the pump according to the flow rate.

[0022] The relationship between the head and the flow rate is determined by the flow rate-head characteristic curve of the pump. The characteristic curves of different pumps are different. Taking the centrifugal pump as an example, the head of the centrifugal pump is: where, is the theoretical head at zero flow rate, is the pump characteristic coefficient (related to the pump design).

[0023] At the same time, in order to ensure that the cold energy generated by the vaporization of liquid hydrogen can be completely absorbed by the circulating medium and avoid partial cold energy still escaping, the first flow rate of the liquid hydrogen pump and the second flow rate of the circulation pump also need to satisfy the heat balance relationship. The specific determination method is as follows: The cold energy generation rate of liquid hydrogen vaporization is: in, is the latent heat of vaporization of liquid hydrogen, is the mass flow rate of the liquid hydrogen pump, is the specific heat capacity of hydrogen at constant pressure, It is the temperature difference allowed for hydrogen vaporization temperature rise, which is a preset fixed value.

[0024] Cold energy absorption rate of circulating medium for: in, is the volume flow rate of the circulation pump, is the density of the circulating medium, is the specific heat capacity of the circulating medium, It is the temperature difference allowed by the circulating pump, which is a preset fixed value.

[0025] To prevent the cold energy from escaping, Should be no less than , and then the thermal balance constraint relationship between the first flow rate and the second flow rate can be obtained as: In the above formula, the first flow rate is The product of , the second flow is the volume flow In the actual test process, a flow rate that satisfies the above-mentioned thermal balance constraint relationship can be arbitrarily selected as the flow rate used for the test within the optional flow rate range under normal operation of the pump.

[0026] In process 300, two circulating pumps can be used to work at the same time, so that at the same time, one circulating pump is responsible for collecting the cold energy generated by the vaporization of liquid hydrogen, and the other circulating pump is responsible for delivering the cold energy required for hydrogen filling. In other embodiments, one circulating pump can also be responsible for two processes at the same time, or multiple circulating pumps can be set up for each process to be responsible at the same time. In addition, as an example, the energy required by the liquid hydrogen pump and the circulating pump can be a pre-cooling device as a "bridge" for cold energy transfer, which delivers the cold energy of the cold storage device to the working fluid of the pump or the generator set, and then the low-temperature working fluid absorbs the ambient heat and evaporates, driving the steam turbine to generate electricity, and the electrical energy drives the pump. In other embodiments, if the pump can directly interact thermally with the circulating medium of the cold storage device, the cold storage device can also be directly connected to the pump, etc.

[0027] After calculating the cold energy release energy 320, according to the actual equipment connection relationship of the liquid hydrogen filling station, select the heat exchange efficiency data 330 of the corresponding equipment to perform a product calculation on the cold energy release energy 320. The first product value 340 obtained can be regarded as the actually available cold energy. By comparing the first product value 340 with the cold energy usage energy 112, a comparison result 114 can be obtained. The comparison result 114 can characterize whether the generated cold energy is sufficient for the cold energy usage of precooling. Finally, according to the comparison result 114, the working state 360 of the refrigeration unit is adjusted accordingly to maximize the savings in the electrical energy consumed by the refrigeration unit. As an example, if the comparison result 114 indicates that the first product value 340 is not less than the cold energy usage energy 112, it means that the cold energy generated by the vaporization of liquid hydrogen in the filling station is sufficient to meet the cold energy usage of the filling process, and the refrigeration unit will not work. If the comparison result 114 indicates that the first product value 340 is less than the cold energy usage energy 112, it means that the cold energy generated by the vaporization of liquid hydrogen in the filling station cannot meet the cold energy usage of the filling process. At this time, all of the first product value 340 can be preferentially used for precooling, and then the difference between the cold energy usage energy 112 and the first product value 340 is used to determine how much additional cold energy needs to be provided. Furthermore, according to the working parameters of the precooling unit, the working duration of the precooling unit is determined, and the precooling unit is controlled to maintain the working state for this duration.

[0028] Figure 4The flowchart shows the determination process 400 of the first flow rate and the second flow rate in some embodiments of the present disclosure. From the flow rate - efficiency performance curve of the pump, it can be seen that after exceeding a certain flow rate range, the efficiency of the pump will start to decrease significantly, resulting in an increase in the energy consumption of the pump. Therefore, in order to save energy consumption, the selected flow rate should be such that the efficiency of the pump is within the high - efficiency operation range. The high - efficiency operation range generally refers to the range where the efficiency is not less than 90% to 100% of the maximum efficiency, and it can generally be marked in the flow rate - efficiency performance curve. The first determination unit 411 can determine the first high - efficiency operation range 421 in the curve according to the flow rate - efficiency curve 401 of the liquid hydrogen pump. The first query unit 431 can query and determine a first flow rate 441 within the first high - efficiency operation range 421. The second determination unit 412 can determine the second high - efficiency operation range 422 in the flow rate - efficiency curve 402 of the circulation pump. The second query unit 432 can query and determine a second flow rate 442 that satisfies the constraint of the first flow rate 441 within the second high - efficiency operation range, so that the first flow rate 441 and the second flow rate 442 satisfy the thermal balance constraint relationship, and further enable the circulating medium at the second flow rate 442 to completely absorb all the cold energy generated by the liquid hydrogen at the first flow rate 441. Then, the first processing unit 451 can calculate the first energy 461 based on the first flow rate 441 at this time, and the second processing unit 452 can calculate the second energy 462 based on the second flow rate 442 at this time. Block 470 can determine whether all combinations of the first flow rate 441 and the second flow rate 442 have been traversed. The second control unit 480 can, after traversing all combinations, determine the combination with the minimum sum of the first energy 461 and the second energy 462, and generate a flow rate control instruction 490 corresponding to the first flow rate 441 and the second flow rate 442 of this combination to control the actual flow rates of the liquid hydrogen pump and the circulation pump, so as to minimize the sum of the energy consumption of each pump.

[0029] As an example, the way to traverse the first flow rate and the second flow rate can be to construct a mathematical model as follows: Wherein, is the first energy, is the second energy, The range of is determined according to the flow rate range corresponding to the first high - efficiency operation range, The range of is determined according to the flow rate range corresponding to the second high - efficiency operation range.

[0030] By solving the mathematical model, the final first flow rate and second flow rate can be determined.

[0031] Figure 5The schematic structural diagram of a liquid hydrogen refueling station system 500 showing some embodiments of the present disclosure is presented. In system 500, to improve the efficiency of hydrogen refueling and avoid the situation where in the initial state, it is necessary to wait for the vaporization of liquid hydrogen and for the cold energy storage device to collect sufficient precooled cold energy before starting the refueling. At the moment when hydrogen refueling is not in progress, if it is detected that the cold energy storage device is not fully stored, a first control instruction can be sent through the terminal 510 to vaporize a part of the liquid hydrogen in advance to store cold energy in the cold energy storage device. The hydrogen vaporized at this time can be stored in the gaseous hydrogen tank 520, and during the hydrogen refueling process, the hydrogen stored in the gaseous hydrogen tank 520 can be preferentially refueled.

[0032] In addition, although a single cold energy storage device can also meet the usage requirements of the entire hydrogen refueling process, that is, it can store the cold energy generated by the vaporization of liquid hydrogen while transporting the cold energy to the precooling device for precooling, it is difficult to accurately determine the remaining cold energy in the cold energy storage device in this way, which is not conducive to the management and coordination of cold energy. Therefore, two cold energy storage devices can be set up simultaneously. During the hydrogen refueling process, one cold energy storage device 530-1 is used to specifically collect the cold energy generated by the vaporization of liquid hydrogen, and one cold energy storage device 530-2 is used to transport cold energy to the precooling device. As an example, the process responsible for each cold energy storage device during each hydrogen refueling process can be adjusted according to the actual situation. For example, during the previous hydrogen refueling process, the cold energy storage device 530-1 can be used as the first cold energy storage device for precooling, and the cold energy storage device 530-2 can be used as the second cold energy storage device for storing cold energy. During the current hydrogen refueling process, the cold energy storage device 530-1 can be used as the second cold energy storage device, and the cold energy storage device 530-2 can be used as the first cold energy storage device to ensure that after each cold energy storage device collects sufficient cold energy, the cold energy can be used in a timely manner, avoiding the situation where the cold energy stored in one cold energy storage device is saturated while the other cold energy storage device has no cold energy available.

[0033] Figure 6The schematic structural diagram of another liquid hydrogen refueling station system 600 according to some embodiments of the present disclosure is shown. In the system 600, if the first product value is greater than the cold energy usage energy, it indicates that after the cold energy generated by the vaporization of liquid hydrogen meets the precooling requirements of the hydrogen refueling process, there is still a part of the surplus cold energy. In order to avoid the accumulation of more and more surplus cold energy with the increase in the number of hydrogen refueling times, and there is too much cold energy in the cold energy storage device that cannot be consumed, resulting in the waste of the cold energy generated by subsequent vaporization, a third cold energy storage device 610-3 can be additionally provided to control the third cold energy storage device 610-3 to collect cold energy after the cold energy storage of the first cold energy storage device 610-1 and the second cold energy storage device 610-2 is full. The cold energy collected by the third cold energy storage device 610-3 can be specifically used to provide a part of cold energy for other devices 620 with cold energy usage requirements (such as air conditioning refrigeration, compressor hydraulic oil cooling, etc.) except for the hydrogen refueling process, further reducing the energy consumption of the refueling station site.

[0034] Figure 7 The schematic structural diagram of the cold energy coupling control device 700 of the liquid hydrogen refueling station according to some embodiments of the present disclosure is shown. Each embodiment in this specification is described in a progressive manner. For the same or similar parts between each embodiment, reference can be made to each other. The key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiment. As Figure 7 shown, the device 700 includes a heat exchange efficiency processing module 701, configured to determine the heat exchange efficiency data of each hydrogen refueling related device in the liquid hydrogen refueling station. The hydrogen refueling related devices include a cold energy storage device for storing the cold energy generated by the vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a precooling device for precooling the hydrogen refueling machine. A cold energy processing module 702, configured to calculate the cold energy release energy during the vaporization of liquid hydrogen and the cold energy usage energy during the hydrogen refueling process in the liquid hydrogen refueling station based on the preset mass of vaporized liquid hydrogen. And a precooling module 703, configured to compare the first product value with the cold energy usage energy, and set the working state of the refrigeration unit of the precooling device during the hydrogen refueling process according to the comparison result, so as to precool the hydrogen refueling process based on the cold energy storage device and the refrigeration unit. The first product value is the product value between the heat exchange efficiency data and the cold energy release energy.

[0035] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the processes or functions described in the embodiments of this specification are generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium or transmitted through the computer-readable storage medium. The computer instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired manner (such as coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or a wireless manner (such as infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that the computer can access or a data storage device such as a server or data center that includes one or more integrated available media. The available medium can be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a Digital Versatile Disc (DVD)), or a semiconductor medium (for example, a Solid State Disk (SSD)), etc.

[0036] Figure 8 A block diagram of an electronic device 800 in which multiple embodiments of the present disclosure can be implemented is shown. As Figure 8 shown, the electronic device 800 includes a processor 810, a disk drive 820, an input / output interface 830, a network interface 840, and a memory 850. Communication connections can be made between the above-mentioned processor 810, disk drive 820, input / output interface 830, network interface 840, and the memory 850 through a communication bus 860.

[0037] Among them, the processor 810 can be implemented in ways such as a general-purpose CPU, a microprocessor, an Application-Specific Integrated Circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in this application.

[0038] The memory 850 can be implemented in the form of ROM (Read Only Memory), RAM (Read Access Memory), static memory, dynamic storage devices, etc. The memory 850 can store the operating system 851 for controlling the operation of the electronic device 800, and the basic input / output system (BIOS) 852 for controlling the low-level operations of the electronic device 800. Additionally, it can also store the web browser 853, data storage management system 854, etc. In summary, when implementing the technical solution provided in this application through software or firmware, the relevant program code is saved in the memory 850 and called and executed by the processor 810.

[0039] The input / output interface 830 is used to connect to the input / output module to achieve information input and output. The input / output module can be configured as a component in the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Among them, the input devices can include keyboards, mice, touchscreens, microphones, various sensors, etc., and the output devices can include displays, speakers, vibrators, indicator lights, etc.

[0040] The network interface 840 is used to connect to the communication module (not shown in the figure) to achieve communication and interaction between the device and other devices. Among them, the communication module can achieve communication through wired means (such as USB, network cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0041] The bus 860 includes a path for transmitting information between various components of the device (such as the processor 810, disk drive 820, input / input interface 830, network interface 840, and memory 850).

[0042] It should be noted that although the above device only shows the processor 810, disk drive 820, input / input interface 830, network interface 840, and memory 850, bus 860, etc., in the specific implementation process, the device may also include other components necessary for normal operation. In addition, those skilled in the art can understand that the above device may only include the components necessary to implement the method of this application and does not necessarily include all the components shown in the figure.

[0043] The program code for implementing the methods of the present disclosure can be written in any combination of one or more programming languages. These program codes can be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing devices, such that when the program codes are executed by the processor or controller, the functions / operations specified in the flowchart and / or block diagram are implemented. The program codes can be executed entirely on the machine, partially on the machine, executed partially on the machine as an independent software package and partially on a remote machine, or executed entirely on a remote machine or server.

[0044] In the context of the present disclosure, a machine-readable medium can be a tangible medium that can contain or store a program for use by or in connection with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. A machine-readable medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of a machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. Additionally, although the operations are depicted in a particular order, this should be understood to require that the operations be performed in the particular order shown or in a sequential order, or that all illustrated operations be performed to achieve the desired result. In certain environments, multitasking and parallel processing may be advantageous. Similarly, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of the present disclosure. Certain features described in the context of separate embodiments can also be implemented in combination in a single implementation. Conversely, the various features described in the context of a single implementation can also be implemented separately or in any suitable sub-combination in multiple implementations.

[0045] Although the subject matter has been described in language specific to structural features and / or methodological acts, it should be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are merely example forms of implementing the claims.

Claims

1. A cold energy coupling control method for a liquid hydrogen refueling station, characterized in that, The method includes: Determining the heat exchange efficiency data of each hydrogenation-related device in a liquid hydrogen filling station, where the hydrogenation-related devices include a cold energy storage device for storing the cold energy generated by the vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a pre-cooling device for pre-cooling a hydrogen filling machine; Calculating, based on a preset mass of vaporized liquid hydrogen, the cold energy release energy during the vaporization of liquid hydrogen and the cold energy usage energy during the hydrogen filling process in the liquid hydrogen filling station; and Comparing a first product value with the cold energy usage energy, and setting the operating state of the refrigeration unit of the pre-cooling device during the hydrogen filling process according to the comparison result, so as to pre-cool the hydrogen filling process based on the cold energy storage device and the refrigeration unit, where the first product value is the product value between the heat exchange efficiency data and the cold energy release energy.

2. The method according to claim 1, wherein The calculating, based on a preset mass of vaporized liquid hydrogen, the cold energy release energy during the vaporization of liquid hydrogen and the cold energy usage energy during the hydrogen filling process in the liquid hydrogen filling station includes: Calculating the cold energy release energy during the vaporization of liquid hydrogen in the liquid hydrogen filling station based on the sum of a second product value between the preset mass of vaporized liquid hydrogen and the latent heat of vaporization of liquid hydrogen, and a third product value between the mass of vaporized liquid hydrogen and a first heat change value, where the first heat change value is the heat absorption value per unit mass of hydrogen during the process of liquid hydrogen from the liquefaction temperature to the storage tank temperature; and Calculating the cold energy usage energy during the hydrogen filling process in the liquid hydrogen filling station based on the sum of a first energy required for a liquid hydrogen pump to flow through the vaporized liquid hydrogen, a second energy of a circulating medium required for a circulating pump to transport the vaporized liquid hydrogen to flow through, and a fourth product value between the mass of vaporized liquid hydrogen and a second heat change value, where the second heat change value is the heat absorption value per unit mass of hydrogen during the process of liquid hydrogen from the pre-cooling temperature to the storage tank temperature.

3. The method according to claim 2, wherein The method further includes: Determining a first high-efficiency operation region in the flow-rate - efficiency curve of the liquid hydrogen pump, and a second high-efficiency operation region in the flow-rate - efficiency curve of the circulating pump; Querying a first flow rate in the first high-efficiency operation region such that a second flow rate corresponding to the first flow rate is in the second high-efficiency operation region, and the sum of the first energy and the second energy is minimized, where the second flow rate is the flow rate capable of completely absorbing the cold energy generated at the first flow rate; and Controlling the liquid hydrogen pump and the circulating pump based on the first flow rate and the second flow rate respectively.

4. The method according to claim 1, wherein The setting the operating state of the refrigeration unit of the pre-cooling device during the hydrogen filling process according to the comparison result, so as to pre-cool the hydrogen filling process based on the cold energy storage device and the refrigeration unit includes: In response to a comparison result indicating that the cold energy release energy after being converted by the heat exchange efficiency is not less than the cold energy usage energy, setting the operating state of the refrigeration unit of the pre-cooling device during the hydrogen filling process to not work, so as to pre-cool the hydrogen filling process based on the cold energy storage device; and In response to a comparison result indicating that the cold energy released during the conversion of the heat exchange efficiency is less than the cold energy used, set the working state of the refrigeration unit of the precooling device to be working during the hydrogen filling process, so as to pre-cool the hydrogen filling process based on the cold energy storage device and the refrigeration unit.

5. The method according to claim 1, characterized in that, The method further includes: During a non-hydrogen filling process, in response to the cold energy storage device not being fully filled with cold energy, send a first control instruction to the vaporizer to control the vaporizer to vaporize liquid hydrogen, and store cold energy based on the cold energy storage device until the cold energy storage device is fully filled with cold energy.

6. The method according to claim 1, wherein The cold energy storage device includes a first cold energy storage device and a second cold energy storage device; The method further includes: During the hydrogen filling process, send a second control instruction to the first cold energy storage device to control the first cold energy storage device to pre-cool the hydrogen filling process; and Send a third control instruction to the second cold energy storage device to control the second cold energy storage device to store the cold energy generated by the vaporizer vaporizing liquid hydrogen.

7. The method according to claim 6, characterized in that, The cold energy storage device further includes a third cold energy storage device; The method further includes: In response to the first cold energy storage device and the second cold energy storage device being fully filled with cold energy, send a fourth control instruction to the third cold energy storage device to control the third cold energy storage device to store the cold energy generated by the vaporizer vaporizing liquid hydrogen, and the third cold energy storage device is used to refrigerate the cold energy usage process other than the hydrogen filling process.

8. A cold energy coupling control device for a liquid hydrogen refueling station, characterized in that, The device includes: A heat exchange efficiency processing module configured to determine the heat exchange efficiency data of each hydrogen filling related device in the liquid hydrogen filling station, and the hydrogen filling related devices include a cold energy storage device for storing the cold energy generated by the vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a precooling device for precooling the hydrogen filling machine; A cold energy processing module configured to calculate the cold energy released during the vaporization of liquid hydrogen and the cold energy used during the hydrogen filling process in the liquid hydrogen filling station respectively based on a preset liquid hydrogen vaporization mass; and A precooling module configured to compare a first product value with the cold energy used, and set the working state of the refrigeration unit of the precooling device during the hydrogen filling process according to the comparison result, so as to pre-cool the hydrogen filling process based on the cold energy storage device and the refrigeration unit, and the first product value is the product value between the heat exchange efficiency data and the cold energy released.

9. An electronic device, including: One or more processors, and A memory associated with the one or more processors, where the memory is used to store program instructions, and when the program instructions are read and executed by the one or more processors, the steps of the method according to any one of claims 1-7 are executed.

10. A computer program product, including a computer program, where when the computer program is executed by a processor, the method according to any one of claims 1-7 is implemented.

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