A cold energy coupling control method, device and electronic equipment for a liquid hydrogen refueling station

Abstract

The embodiments of this specification disclose a cold energy coupling control method, device and electronic equipment for a liquid hydrogen refueling station. The method includes determining the heat exchange efficiency data of each hydrogenation-related equipment in the liquid hydrogen refueling station. Based on the preset mass of vaporized liquid hydrogen, the cold energy release energy of the liquid hydrogen refueling station during the liquid hydrogen vaporization process and the cold energy usage energy during the hydrogen refueling process are calculated respectively. The first product value and the cold energy usage energy are compared, and the working state of the refrigeration unit of the pre-cooling device during the hydrogen refueling process is set 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 embodiments of this specification can compare the actually available cold energy and the cold energy required for the refueling process when consuming the same mass of liquid hydrogen through the conversion of heat exchange efficiency data, and dynamically adjust the working state of the refrigeration unit according to the comparison result to give priority to consuming the cold energy generated by vaporization, reduce the energy consumption of the refrigeration unit, and save the pre-cooling energy consumption of hydrogen refueling.

Description

Technical Field

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

[0002] Hydrogen refueling stations are locations that supply hydrogen to fuel cell vehicles. During the high-pressure hydrogen refueling process, the Joule-Thomson effect causes the hydrogen in the fuel cell vehicle's onboard hydrogen storage tanks to rapidly heat up, posing a serious safety hazard. Currently, refrigerants are commonly used to pre-cool the refueled hydrogen to control the hydrogen temperature during the refueling process and ensure hydrogen refueling safety. However, this method consumes a large amount of electricity for hydrogen pre-cooling, resulting in high energy consumption. Summary of the Invention

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

[0004] According to the first aspect of the present disclosure, a cold energy coupling control method for a liquid hydrogen refueling station is provided. The method includes determining the heat exchange efficiency data of each hydrogenation-related equipment in the liquid hydrogen refueling station, and the hydrogenation-related equipment includes a cold 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 hydrogenator. The method also includes calculating the cold energy release energy of the liquid hydrogen refueling station during the liquid hydrogen vaporization process and the cold energy usage energy during the hydrogen filling process based on a preset mass of vaporized liquid hydrogen. In addition, the method also includes comparing the 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 filling process according to the comparison result, so as to pre-cool the hydrogen filling 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.

[0005] According to the second aspect of the present disclosure, a cold energy coupling control device for a liquid hydrogen refueling station is provided. The device includes a heat exchange efficiency processing module, which is configured to determine the heat exchange efficiency data of each hydrogenation-related equipment in the liquid hydrogen refueling station. The hydrogenation-related equipment includes a cold 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 hydrogenation machine. The device also includes a cold energy processing module, which is configured to calculate the cold energy released during the liquid hydrogen vaporization process and the cold energy used during the hydrogen filling process of the liquid hydrogen refueling station based on a preset mass of vaporized liquid hydrogen. In addition, the device also includes a pre-cooling module, which is configured to compare the first product value and the cold energy used, and set the working 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 storage device and the refrigeration unit. The first product value is the product value between the heat exchange efficiency data and the cold energy released energy.

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

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

[0008] It should be understood that the contents described in the Summary of the Invention section are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0010] Figure 1 A schematic diagram illustrating an example environment in which various embodiments of the present disclosure may be implemented;

[0011] Figure 2 A schematic flow chart showing a cold energy coupling control method for a liquid hydrogen refueling station according to some embodiments of the present disclosure is shown;

[0012] Figure 3 A schematic flow chart showing a comparison process of the first product value and the cooling energy usage energy according to some embodiments of the present disclosure is shown;

[0013] Figure 4A schematic diagram illustrating a process of determining a first flow rate and a second flow rate in some embodiments of the present disclosure is shown;

[0014] Figure 5 A schematic diagram of the system structure of a liquid hydrogen refueling station system according to some embodiments of the present disclosure is shown;

[0015] Figure 6 A schematic diagram showing the system structure of another liquid hydrogen refueling station system according to some embodiments of the present disclosure is shown;

[0016] Figure 7 A schematic structural diagram of a cold energy coupling control device of a liquid hydrogen refueling station according to some embodiments of the present disclosure is shown;

[0017] Figure 8 A schematic block diagram of an electronic device according to some embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0018] To make the purpose, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this specification will be clearly and completely described below in conjunction with the embodiments of this specification and the corresponding drawings. Obviously, the described embodiments are only part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without making creative efforts are within the scope of protection of this application.

[0019] The terms "including" and "having," and any variations thereof, in this specification, claims, and drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements, but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus. Depending on the context, the word "if," as used herein, may be interpreted as "when" or "when" or "in response to determining" or "in response to detecting."

[0020] As mentioned above, liquid hydrogen refueling stations have advantages over high-pressure gaseous hydrogen refueling stations, such as small footprint, high hydrogen purity, and high station efficiency. Liquid hydrogen refueling stations can provide both liquid hydrogen and high-pressure hydrogen refueling, making them suitable for a variety of hydrogen fuel cell vehicles. This has led to an increase in the number of liquid hydrogen refueling stations. During the hydrogen refueling process, the Joule-Thomson effect of hydrogen can cause the hydrogen in the fuel cell vehicle's onboard hydrogen storage bottle group to heat up rapidly, posing a serious safety hazard to the onboard hydrogen storage bottle group. Therefore, in actual applications, refrigerants are usually used to pre-cool the refueled hydrogen. Typically, the temperature of the hydrogen storage tank is maintained at 30 degrees Celsius, and the hydrogen needs to be pre-cooled before refueling, with a minimum temperature of -40 degrees Celsius. For this purpose, the refrigeration unit needs to consume a certain amount of electricity to achieve hydrogen refueling pre-cooling. During the hydrogen refueling process, as the hydrogen refueling speed increases, the temperature of the on-board hydrogen storage bottle group rises faster. Therefore, it is necessary to control the hydrogen temperature during the refueling process to ensure the safety of hydrogen refueling. This inevitably requires a large amount of electricity to be consumed for hydrogen pre-cooling, resulting in high energy consumption of the hydrogen refueling station.

[0021] To address this issue, embodiments of the present disclosure propose a cold energy coupling control method for a liquid hydrogen refueling station. In this embodiment, the method compares the cold energy released after heat exchange (hereinafter referred to as the first product value determined based on heat exchange efficiency data and cold energy released) with the cold energy usage to determine whether to use the cold energy generated by liquid hydrogen vaporization for hydrogen refueling pre-cooling, or to use the cold energy generated by liquid hydrogen vaporization and the cold energy generated by the refrigeration unit for hydrogen refueling pre-cooling.

[0022] Through the above method, the present application can dynamically regulate the cold energy supply object required for hydrogen refueling pre-cooling according to the use of cold energy output from liquid hydrogen to the pipeline before pre-cooling, and the energy change of the cold energy released in the liquid hydrogen vaporization process after heat exchange between equipment, so as to pre-cool according to the cold energy stored in the cold storage device combined with the refrigeration unit, without relying entirely on the refrigeration unit for pre-cooling. In some cases, pre-cooling can be achieved without using a refrigeration unit, thereby realizing the coupled utilization of wasted high-quality cold energy and significantly reducing the energy consumption of the hydrogen refueling station system.

[0023] Figure 1 1 shows a schematic diagram of an example environment 100 in which various embodiments of the present disclosure may be implemented. 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 pre-cooling device 180, and a hydrogen refueling machine 190. The liquid hydrogen in the liquid hydrogen tank 120 may be transported to the vaporizer 140 by the action of the liquid hydrogen pump 130, and vaporized by heat exchange with air in the vaporizer 140. The vaporized hydrogen may be directly transported to the hydrogen refueling machine 190 for hydrogen refueling, or may be first stored in the gaseous hydrogen tank 150 and then transported from the gaseous hydrogen tank 150 to the hydrogen refueling machine 190 when hydrogen refueling is required. During operation, the first circulating pump 160-1 can transport the circulating medium capable of absorbing cold energy from the cold storage device 170 to the vaporizer 140, allowing the circulating medium to absorb the cold energy generated by the vaporization of liquid hydrogen and then transport the cold energy to the cold storage device 170 for storage. The second circulating pump 160-2 can also transport the stored cold energy in the cold storage device 170 to the pre-cooling device 180 by transporting the circulating medium to the pre-cooling device 180 for heat exchange, allowing the pre-cooling device 180 to use this cold energy to pre-cool the hydrogenator 190. The circulating medium can be selected from media that do not become solid at low temperatures, such as ethylene glycol solution, propylene glycol solution, ethanol, aqueous ammonia solution, and lithium bromide solution. A pre-cooling unit can also be provided in the pre-cooling device 180. When the cold energy stored in the cold storage device 170 is insufficient to meet the pre-cooling demand, the pre-cooling unit can consume electrical energy to achieve pre-cooling. One or more circulating pumps may be provided. When only one circulating pump is provided, the circulating pump can simultaneously transport the circulating medium from the cold storage device 170 to the vaporizer 140 and from the cold storage device 170 to the pre-cooling device 180. When multiple circulating pumps 160 are provided, each circulating pump 160 can be responsible for a separate transport cycle, as shown in environment 100. Terminal 110 can be any device with computing or processing capabilities. For example, terminal 110 may include, but is not limited to, a mobile phone, a tablet computer, a desktop computer, a server, etc. Terminal 110 can be connected to the liquid hydrogen tank 120, liquid hydrogen pump 130, vaporizer 140, circulating pump 160, cold storage device 170, and pre-cooling device 180 to enable data collection and interaction with the corresponding devices. Terminal 110 can use a comparison unit 113 to compare the cold energy released 111 and the cold energy used 112 generated by the hydrogen refueling station after heat exchange to generate a comparison result 114. The first control unit 115 of the terminal 110 can generate a cooling instruction 116 according to the comparison result 114, and control the working states of the cold storage device 170 and the pre-cooling device 180 respectively through the cooling instruction 116.

[0024] Figure 2FIG2 shows a flow chart of a cold energy coupling control method 200 for a liquid hydrogen refueling station according to some embodiments of the present disclosure. The method 200 may be executed by the terminal 110, for example. Figure 2 As shown, at block 202, method 200 may determine heat exchange efficiency data for each hydrogenation-related device in a liquid hydrogen refueling station. The hydrogenation-related devices include a cold storage device for storing cold energy generated by vaporizing liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a pre-cooling device for pre-cooling the hydrogenation machine. In this embodiment, energy loss is inevitable during the transfer of energy between the various devices in the hydrogenation station. To accurately determine the available cold energy within the hydrogenation station, it is first necessary to determine heat exchange efficiency data for each hydrogenation-related device within the hydrogenation station related to the cold energy transfer process. Cold energy is generally first generated from vaporized liquid hydrogen in the vaporizer, then transferred to a cold storage device for storage, and finally to a pre-cooling device for pre-cooling. Therefore, the hydrogenation-related devices must include at least a cold storage device, a vaporizer, and a pre-cooling device. As an example, the heat exchange efficiency of the device is related to the device model. That is, once the model is determined, the heat exchange efficiency of the device is also determined. As a device parameter, the heat exchange efficiency is generally tested and calculated before the device leaves the factory. Therefore, the equipment model of each hydrogenation-related equipment can be directly obtained, and then the equipment parameters of the corresponding equipment can be queried through the equipment model, and the heat exchange efficiency data of the equipment can be queried in the equipment parameters.

[0025] At block 204, method 200 can calculate the cold energy released during the liquid hydrogen vaporization process and the cold energy used during the hydrogen refueling process at 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 the cold energy calculation can be pre-set. This mass of vaporized liquid hydrogen is used to indicate the mass of liquid hydrogen consumed for vaporization. The specific value of this mass of vaporized liquid hydrogen can be set based on actual conditions. The main requirement is to ensure that the cold energy released and the cold energy used are calculated using the same mass of vaporized liquid hydrogen, so as to facilitate subsequent comparison of the cold energy generated by the same mass of liquid hydrogen and the cold energy required for refueling. Next, the cold energy released during the liquid hydrogen vaporization process and the cold energy used for pre-cooling during the hydrogen refueling process are calculated using this mass of vaporized liquid hydrogen. As an example, the cold energy released can include the heat absorbed during the liquid hydrogen heating process and the heat absorbed during the phase change process. In addition, in order to make full use of cold energy, the energy required by the liquid hydrogen pump and the circulation pump can also be provided by cold energy. Therefore, the energy used by cold energy can include the energy consumed by the liquid hydrogen pump to transport liquid hydrogen, the energy consumed by the circulation pump to transport the circulating medium that absorbs cold energy, and the heat released by cooling the vaporized hydrogen to a temperature that meets the refueling requirements.

[0026] At block 206, method 200 may compare the first product value with the cold energy usage. Based on the comparison result, the operating state of the pre-cooling device's refrigeration unit during the hydrogen refueling process is set to pre-cool the hydrogen refueling process based on the cold storage device and the refrigeration unit. The first product value is the product of the heat exchange efficiency data and the cold energy release energy. In this embodiment, for the cold energy generated by the vaporization of liquid hydrogen to be actually utilized, the cold energy must be transferred between devices, resulting in some loss due to heat exchange efficiency issues. Therefore, the first product value can be calculated by multiplying the heat exchange efficiency data by the cold energy release energy. This first product value can represent the portion of the generated cold energy that can actually be used. By comparing the first product value with the cold energy usage, it can be determined whether the cold energy generated by vaporizing the same mass of liquid hydrogen meets the cold energy consumed during the refueling process for that mass of hydrogen, and further, whether additional cold energy needs to be generated by the pre-cooling unit to meet the cold energy usage requirement. Finally, the working status of the refrigeration unit during the hydrogen filling process will be set accordingly based on the comparison results, so that the liquid hydrogen filling station can control the cold storage device for pre-cooling according to its own cold energy generation and use, or pre-cool through the cold storage device and the refrigeration unit at the same time, realizing the coupled utilization of high-quality cold energy wasted in the liquid hydrogen vaporization process, which can significantly reduce the energy consumption of the hydrogen filling station system.

[0027] Figure 3 FIG. 3 is a flow chart showing a comparison process 300 of the first product value and the cooling energy usage energy in some embodiments of the present disclosure. Figure 3 As shown, the 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 sum of a second product value 310 between a preset mass of vaporized liquid hydrogen and the latent heat of vaporization of liquid hydrogen, and a third product value 311 between the mass of vaporized liquid hydrogen and a first heat change value, the first heat change value being the heat absorption value of a unit mass of hydrogen in the process of liquid hydrogen changing from the liquefaction temperature to the storage tank temperature. The process 300 may also calculate the cold energy usage energy 112 of the liquid hydrogen refueling station during the hydrogen filling process based on the sum of a first energy 350 required for the liquid hydrogen pump to flow through the vaporized liquid hydrogen, a second energy 351 required for the circulating medium to flow through the circulating pump to transport the vaporized liquid hydrogen, and a fourth product value 352 between the mass of vaporized liquid hydrogen and the second heat change value, the second heat change value being the heat absorption value of a unit mass of hydrogen in the process of liquid hydrogen changing from the pre-cooling temperature to the storage tank temperature. In this embodiment, the cold energy release energy The calculation formula can be:

[0028]

[0029] in, It is the latent heat of vaporization of liquid hydrogen, that is, the heat absorbed during the phase change of liquid hydrogen from liquid to gas under the condition of constant temperature. is the preset vaporized liquid hydrogen mass, is the liquefaction temperature of liquid hydrogen, is the temperature of the tank after liquid hydrogen is liquefied. is the specific heat capacity of hydrogen at constant pressure.

[0030] Cold energy use energy The calculation formula can be:

[0031]

[0032] in, is the energy required to flow through each kilogram of liquid hydrogen, The energy required by the first circulating pump to pass through each kilogram of circulating medium, The first circulating pump flows through The mass of circulating medium required for the flow of liquid hydrogen, The energy required by the second circulating pump for each kilogram of circulating medium flowing through it, For the second circulation pump to flow through The mass of circulating medium required for the flow of liquid hydrogen, The pre-cooling temperature required for hydrogen filling.

[0033] 、 and Specific energy , that is, the energy consumption per unit mass of fluid, which can be calculated by the following formula:

[0034]

[0035] in, is the pump power, is the medium density, is the acceleration due to gravity, For traffic, For lift, The specific value of the efficiency can be determined by querying the flow-efficiency characteristic curve of the pump according to the flow rate.

[0036] The relationship between head and flow is determined by the flow-head characteristic curve of the pump. Different pumps have different characteristic curves. Taking a centrifugal pump as an example, the head of a centrifugal pump is:

[0037]

[0038] in, The theoretical head at zero flow, is the pump characteristic coefficient (related to pump design).

[0039] 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 to prevent some of the cold energy from still escaping, the first flow rate of the liquid hydrogen pump and the second flow rate of the circulating pump must also meet the thermal balance relationship. The specific determination method is as follows:

[0040] Cold energy generation rate of liquid hydrogen vaporization for:

[0041]

[0042] 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, The temperature difference allowed for hydrogen vaporization temperature rise is a preset fixed value.

[0043] Cold energy absorption rate of circulating medium for:

[0044]

[0045] 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, The temperature difference allowed by the circulating pump is a preset fixed value.

[0046] 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 follows:

[0047]

[0048] In the above formula, the first flow rate is The product of is the mass flow rate , the second flow is the volume flow In the actual test process, the flow rate that satisfies the above-mentioned heat 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.

[0049] 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 refueling. 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 used by the pre-cooling device as a "bridge" for cold energy transfer, which transfers the cold energy of the cold storage device to the working fluid of the pump or 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 then 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.

[0050] After calculating the cold energy release energy 320, the heat exchange efficiency data 330 of the corresponding equipment is selected based on the actual equipment connection relationship of the liquid hydrogen refueling station and the cold energy release energy 320 is multiplied. The resulting first product value 340 can be regarded as the actual usable 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 indicate whether the generated cold energy is sufficient for pre-cooling. Ultimately, the operating state 360 ​​of the refrigeration unit is adjusted accordingly based on the comparison result 114 to maximize the energy savings of 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 hydrogen refueling station for vaporizing the liquid hydrogen is sufficient to meet the cold energy usage of the refueling process, and the refrigeration unit will be deactivated. If the comparison result 114 indicates that the first product value 340 is less than the cold energy usage 112, it means that the cold energy generated by the hydrogen refueling station for vaporization of liquid hydrogen cannot meet the cold energy usage of the refueling process. At this time, the entire first product value 340 can be used for pre-cooling first, and then the amount of additional cold energy required is determined based on the difference between the cold energy usage 112 and the first product value 340. Then, the working time of the pre-cooling unit is determined based on the working parameters of the pre-cooling unit, and the pre-cooling unit is controlled to maintain the working state for that time.

[0051] Figure 4A flow chart of a process 400 for determining the first flow rate and the second flow rate of some embodiments of the present disclosure is shown. It can be seen from the flow-efficiency performance curve of the pump that after exceeding a certain flow range, the efficiency of the pump will begin 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 operating area. The high-efficiency operating area generally refers to a range in which the efficiency is not less than 90% to 100% of the maximum efficiency, which can generally be identified in the flow-efficiency performance curve. The first determination unit 411 can determine the first high-efficiency operating area 421 in the curve based on the flow-efficiency curve 401 of the liquid hydrogen pump, and the first query unit 431 can query and determine a first flow rate 441 within the first high-efficiency operating area 421. The second determination unit 412 can determine the second high-efficiency operating area 422 in the flow-efficiency curve 402 of the circulation pump, and the second query unit 432 can query the second flow 442 that satisfies the first flow 441 constraint in the second high-efficiency operating area, so that the first flow 441 and the second flow 442 satisfy the thermal balance constraint relationship, thereby allowing the circulating medium at the second flow 442 to fully 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 441 at this time, and the second processing unit 452 can calculate the second energy 462 based on the second flow 442 at this time. Block 470 can determine whether all combinations of the first flow 441 and the second flow 442 have been traversed. After traversing all combinations, the second control unit 480 can determine the combination with the smallest sum of the first energy 461 and the second energy 462, and generate a flow control instruction 490 based on the combination corresponding to the first flow 441 and the second flow 442, to control the actual flow rates of the liquid hydrogen pump and the circulation pump to minimize the sum of the energy consumption of each pump.

[0052] As an example, a method of traversing the first flow and the second flow may be to construct a mathematical model as follows:

[0053]

[0054] in, The first energy, is the second energy, The range is determined according to the flow range corresponding to the first efficient operation area. The range is determined according to the flow range corresponding to the second high-efficiency operation area.

[0055] By solving the mathematical model, the final first flow rate and second flow rate can be determined.

[0056] Figure 5A schematic diagram of the system structure of a liquid hydrogen refueling station system 500 according to some embodiments of the present disclosure is shown. In the system 500, in order to improve the efficiency of hydrogen refueling and avoid the situation in which, in the initial state, it is necessary to wait for the liquid hydrogen to vaporize and the cold storage device to collect enough pre-cooling cold energy before refueling can begin, when hydrogen refueling is not being performed, if it is detected that the cold energy of the cold storage device is not fully stored, a portion of the liquid hydrogen can be pre-vaporized by sending a first control instruction through the terminal 510 to store cold energy in the cold storage device. At this time, the vaporized hydrogen can be stored in the gas hydrogen tank 520. During the hydrogen refueling process, the hydrogen stored in the gas hydrogen tank 520 can be filled first.

[0057] In addition, although a single cold storage device can also meet the usage requirements of the entire hydrogen filling process, that is, it can store the cold energy generated by the vaporization of liquid hydrogen while transmitting the cold energy to the pre-cooling device for pre-cooling, it is difficult to accurately determine the remaining cold energy in the cold storage device in this way, which is not conducive to the management and coordination of cold energy. Therefore, two cold storage devices can be set up at the same time. During the hydrogen filling process, one cold storage device 530-1 is used to specifically collect the cold energy generated by the vaporization of liquid hydrogen, and one cold storage device 530-2 is used to transmit cold energy to the pre-cooling device. As an example, the process that each cold storage device is responsible for during each hydrogen filling process can be adjusted according to actual conditions. For example, in the last hydrogen filling process, the cold storage device 530-1 can be used as the first cold storage device for pre-cooling, and the cold storage device 530-2 can be used as the second cold storage device for storing cold energy. During this hydrogen filling process, the cold storage device 530-1 can be used as the second cold storage device, and the cold storage device 530-2 can be used as the first cold storage device to ensure that each cold storage device can use the cold energy in time after collecting enough cold energy, avoiding the situation where the cold energy stored in one cold storage device is saturated while the other cold storage device has no cold energy to use.

[0058] Figure 6A schematic diagram of the system structure of another liquid hydrogen refueling station system 600 according to some embodiments of the present disclosure is shown. In system 600, if the first product value is greater than the cold energy usage, it indicates that after the cold energy generated by liquid hydrogen vaporization meets the pre-cooling requirements of the hydrogen refueling process, a portion of surplus cold energy remains. To prevent the accumulation of surplus cold energy as the number of hydrogen refuelings increases, resulting in excessive cold energy remaining in the cold storage device and being unconsumed, thereby causing the cold energy generated by subsequent vaporization to be wasted, a third cold storage device 610-3 can be additionally provided. After the cold energy storage in the first cold storage device 610-1 and the second cold storage device 610-2 is full, the third cold storage device 610-3 is controlled to collect cold energy. The cold energy collected by the third cold storage device 610-3 can be used specifically to provide a portion of cold energy to equipment 620 that requires cold energy outside of the hydrogen refueling process (such as air conditioning refrigeration, compressor hydraulic oil cooling, etc.), further reducing the energy consumption of the hydrogen refueling station.

[0059] Figure 7 The schematic diagram of the structure of the cold energy coupling control device 700 of the liquid hydrogen refueling station of some embodiments of the present disclosure is shown. The various embodiments in this specification are described in a progressive manner, and the same and similar parts between the various embodiments can be referred to each other. Each embodiment focuses on 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 be referred to the partial description of the method embodiment. Figure 7 As shown, apparatus 700 includes a heat exchange efficiency processing module 701 configured to determine heat exchange efficiency data for each hydrogenation-related device in a liquid hydrogen refueling station. The hydrogenation-related devices include a cold storage device for storing cold energy generated by liquid hydrogen vaporization, a vaporizer for vaporizing liquid hydrogen, and a pre-cooling device for pre-cooling the hydrogenation machine. A cold energy processing module 702 is configured to calculate the cold energy released during the liquid hydrogen vaporization process and the cold energy used during the hydrogen refueling process of the liquid hydrogen refueling station based on a preset mass of vaporized liquid hydrogen. And a pre-cooling module 703 is configured to compare a first product value with the cold energy used, and set the operating state of the refrigeration unit of the pre-cooling device during the hydrogen refueling process based on 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 of the heat exchange efficiency data and the cold energy released.

[0060] In the above embodiments, all or part of the embodiments can be implemented using software, hardware, firmware, or any combination thereof. When implemented using software, all or part of the embodiments can be implemented 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, all or part of the processes or functions described in the embodiments of this specification are generated. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions can be stored in a computer-readable storage medium or transmitted via 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 via wired (e.g., coaxial cable, optical fiber, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium can be any available medium that can be accessed by a computer, or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a digital versatile disc (DVD)), or a semiconductor medium (eg, a solid state drive (SSD)).

[0061] Figure 8 8 shows a block diagram of an electronic device 800 that can implement various embodiments of the present disclosure. Figure 8 As shown, electronic device 800 includes a processor 810, a disk drive 820, an input / output interface 830, a network interface 840, and a memory 850. The processor 810, disk drive 820, input / output interface 830, network interface 840, and memory 850 can be communicatively connected via a communication bus 860.

[0062] The processor 810 may be implemented as a general-purpose CPU, a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits, and may be used to execute relevant programs to implement the technical solutions provided in this application.

[0063] 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 an operating system 851 for controlling the operation of the electronic device 800 and a basic input and output system (BIOS) 852 for controlling the low-level operations of the electronic device 800. In addition, a web browser 853, a data storage management system 854, etc. can also be stored. In short, when the technical solutions provided in this application are implemented through software or firmware, the relevant program code is stored in the memory 850 and is called and executed by the processor 810.

[0064] The input / output interface 830 is used to connect to an input / output module to enable information input and output. The input / output module can be configured as a component within the device (not shown) or can be externally connected to the device to provide corresponding functions. Input devices may include a keyboard, mouse, touch screen, microphone, various sensors, etc. Output devices may include a display, speaker, vibrator, indicator light, etc.

[0065] The network interface 840 is used to connect to a communication module (not shown) to enable communication between the device and other devices. The communication module can communicate via wired means (e.g., USB, network cable, etc.) or wireless means (e.g., mobile network, Wi-Fi, Bluetooth, etc.).

[0066] The bus 860 comprises a pathway for transmitting information between the various components of the device (eg, the processor 810 , disk drive 820 , input / output interface 830 , network interface 840 , and memory 850 ).

[0067] It should be noted that although the above device only shows a processor 810, a disk drive 820, an input / output interface 830, a network interface 840, a memory 850, a bus 860, etc., in a specific implementation, the device may also include other components necessary for normal operation. In addition, those skilled in the art will understand that the above device may only include components necessary to implement the method of the present application, and does not necessarily include all the components shown in the figure.

[0068] The program code for implementing the method 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 device so that when the program code is executed by the processor or controller, the functions / operations specified in the flow chart and / or block diagram are implemented. The program code can be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0069] In the context of this disclosure, a machine-readable medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium may be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media may include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatuses, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing. Furthermore, although operations are depicted in a particular order, this should be understood as requiring that such 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 circumstances, multitasking and parallel processing may be advantageous. Likewise, although several specific implementation details are included in the above discussion, these should not be construed as limiting the scope of this disclosure. Certain features described in the context of separate embodiments may also be implemented in combination in a single implementation. Conversely, various features described in the context of a single implementation may also be implemented in multiple implementations individually or in any suitable subcombination.

[0070] Although the subject matter has been described in language specific to structural features and / or methodological logical 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 comprises: Determine heat exchange efficiency data for each hydrogenation-related equipment in the liquid hydrogen refueling station, including a cold storage device for storing cold energy generated by vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a precooling device for precooling the hydrogenation machine; Based on the preset mass of vaporized liquid hydrogen, the cold energy released during the liquid hydrogen vaporization process and the cold energy used during the hydrogen filling process of the liquid hydrogen refueling station are calculated respectively, including: Calculating the cold energy released by the liquid hydrogen refueling station during the vaporization of liquid hydrogen based on the sum of a second product value of a preset mass of the vaporized liquid hydrogen and the latent heat of vaporization of the liquid hydrogen, and a third product value of the mass of the vaporized liquid hydrogen and a first heat change value, wherein the first heat change value is a heat absorption value per unit mass of hydrogen during the process of liquid hydrogen rising from a liquefaction temperature to a storage tank temperature; and Calculating the cold energy usage of the liquid hydrogen refueling station during the hydrogen refueling process based on a sum of a first energy required by the liquid hydrogen pump to flow through the vaporized liquid hydrogen, a second energy of the circulating medium required by the circulating pump to flow through the vaporized liquid hydrogen, and a fourth product value of the mass of the vaporized liquid hydrogen and a second heat change value, wherein the second heat change value is a heat absorption value per unit mass of hydrogen during the process of liquid hydrogen changing from a pre-cooling temperature to a temperature of the storage tank; and Compare the first product value with the cold energy usage energy, and set the working 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 storage device and the refrigeration unit, wherein 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, characterized in that The method further comprises: Determining a first high-efficiency operating region in a flow-efficiency curve of the liquid hydrogen pump and a second high-efficiency operating region in a flow-efficiency curve of the circulation pump; querying a first flow rate within the first high-efficiency operating range so that a second flow rate corresponding to the first flow rate is within the second high-efficiency operating range and the sum of the first energy and the second energy is minimized, and the second flow rate is a flow rate capable of completely absorbing cold energy generated at the first flow rate; and The liquid hydrogen pump and the circulation pump are controlled based on the first flow rate and the second flow rate, respectively.

3. The method according to claim 1, characterized in that The method of setting the working 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 storage device and the refrigeration unit, includes: In response to a comparison result characterized as the cold energy released after heat exchange efficiency conversion being not less than the cold energy used, setting the operating state of the refrigeration unit of the pre-cooling device during the hydrogen filling process to non-operating, so as to pre-cool the hydrogen filling process based on the cold storage device; and In response to a comparison result characterized as the cold energy released after heat exchange efficiency conversion being less than the cold energy used energy, the working state of the refrigeration unit of the pre-cooling device during the hydrogen filling process is set to working, so as to pre-cool the hydrogen filling process based on the cold storage device and the refrigeration unit.

4. The method according to claim 1, wherein The method further comprises: During a non-hydrogen filling process, in response to the cold storage device not storing full cold energy, a first control instruction is sent to the vaporizer to control the vaporizer to vaporize liquid hydrogen and store cold energy based on the cold storage device until the cold storage device stores full cold energy.

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

6. The method according to claim 5, characterized in that The cold storage device further includes a third cold storage device; The method further comprises: In response to the first cold storage device and the second cold storage device having stored full cold energy, a fourth control instruction is sent to the third cold storage device to control the third cold storage device to store the cold energy generated by the vaporizer vaporizing liquid hydrogen. The third cold storage device is used to refrigerate the cold energy usage process other than the hydrogen filling process.

7. A cold energy coupling control device for a liquid hydrogen refueling station, characterized in that: The device comprises: a heat exchange efficiency processing module configured to determine heat exchange efficiency data of each hydrogenation-related equipment in the liquid hydrogen refueling station, wherein the hydrogenation-related equipment includes a cold storage device for storing cold energy generated by vaporization of liquid hydrogen, a vaporizer for vaporizing liquid hydrogen, and a precooling device for precooling the hydrogenation machine; The cold energy processing module is configured to calculate the cold energy released during the liquid hydrogen vaporization process and the cold energy used during the hydrogen filling process of the liquid hydrogen refueling station based on a preset mass of vaporized liquid hydrogen, including: Calculating the cold energy released by the liquid hydrogen refueling station during the vaporization of liquid hydrogen based on the sum of a second product value of a preset mass of the vaporized liquid hydrogen and the latent heat of vaporization of the liquid hydrogen, and a third product value of the mass of the vaporized liquid hydrogen and a first heat change value, wherein the first heat change value is a heat absorption value per unit mass of hydrogen during the process of liquid hydrogen rising from a liquefaction temperature to a storage tank temperature; and Calculating the cold energy usage of the liquid hydrogen refueling station during the hydrogen refueling process based on a sum of a first energy required by the liquid hydrogen pump to flow through the vaporized liquid hydrogen, a second energy of the circulating medium required by the circulating pump to flow through the vaporized liquid hydrogen, and a fourth product value of the mass of the vaporized liquid hydrogen and a second heat change value, wherein the second heat change value is a heat absorption value per unit mass of hydrogen during the process of liquid hydrogen changing from a pre-cooling temperature to a temperature of the storage tank; and The precooling module is configured to compare a 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 filling process according to the comparison result, so as to precool the hydrogen filling process based on the cold storage device and the refrigeration unit, wherein the first product value is the product value between the heat exchange efficiency data and the cold energy release energy.

8. An electronic device comprising: one or more processors, and A memory associated with the one or more processors, the memory being used to store program instructions, wherein 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 to 6 are executed.

9. Computer program product comprising a computer program, which, when executed by a processor, implements the method according to any one of claims 1 to 6.

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