Liquid hydrogen production system based on digital twinning

Abstract

The present application relates to a kind of liquid hydrogen production systems based on digital twinning, the liquid hydrogen production system based on digital twinning of corresponding digital twin system is intuitively established based on the physical system of liquid hydrogen production equipment, and various pressure sensors, temperature sensors, flow meters, tachometers, hydrogen concentration sensors and remote camera on liquid hydrogen production equipment, such as sensor data based on big data, internet of things, artificial intelligence and 5G communication technology, synchronous display on the digital twin system, through the remote monitoring of the digital twin system, dynamic simulation, energy efficiency optimization analysis, fault early warning and FMECA analysis etc., the running state of the liquid hydrogen production equipment, processing analysis and automatic monitoring early warning are fully shown, the interactive means of the present application is good, the degree of visualization is high, the running state of liquid hydrogen production equipment can be intuitively and real-time displayed, the running safety of liquid hydrogen production equipment and the safety of on-site operating personnel are effectively guaranteed.

Description

Technical Field

[0001] This invention relates to the fields of liquid hydrogen production and hydrogen liquefaction technology, and in particular to a liquid hydrogen production system based on digital twins. Background Technology

[0002] Hydrogen energy boasts high energy density, is clean and environmentally friendly, and is easy to use. It produces water upon combustion without generating any pollutants, making it considered an ideal energy carrier. Developing a hydrogen economy can reduce greenhouse gas and particulate matter emissions, achieving energy diversification. On one hand, hydrogen energy is compatible with existing energy systems, easily and efficiently converted into electricity or heat with high conversion efficiency. Surplus electricity generated from renewable energy sources can be converted into hydrogen for storage and transported to various locations for use whenever needed.

[0003] In large-scale transportation, liquid hydrogen has a high storage density, which can significantly improve transportation efficiency, reduce storage and transportation pressure, and enhance system safety. Liquid hydrogen production equipment, also known as a hydrogen liquefaction unit, is the key equipment for liquefying hydrogen gas into a liquid. Liquid hydrogen production equipment typically consists of a room temperature compressor unit, a cold box (including a hydrogen turbine expander unit, multi-stage cryogenic heat exchangers, internal adsorbers, and a cryogenic working fluid precooling subsystem), and liquid hydrogen storage tanks. Currently, major international suppliers of liquid hydrogen production equipment include Air Products (USA), Linde Group (Switzerland), Air Liquide (France), Iwatani Corporation (Japan), and Kawasaki Heavy Industries (Japan). Existing liquid hydrogen production equipment relies on remote monitoring of local liquid hydrogen production equipment operation data using an industrial PLC control system. This method has drawbacks such as limited functionality and weak interactive capabilities. As the scale of liquid hydrogen production equipment reaches tens or even hundreds of tons per day of liquefaction, issues such as on-site maintenance, operational support, and personnel costs become increasingly prominent. Furthermore, potential equipment failures or aging in liquid hydrogen production equipment can lead to a gradual increase in safety issues during operation. Existing industrial PLC-based control systems are unable to make such predictions, making it imperative to ensure the safe operation of liquid hydrogen production equipment a pressing problem that needs to be addressed. Summary of the Invention

[0004] Based on this, one objective of the present invention is to provide a liquid hydrogen production system based on digital twins. Through remote monitoring, dynamic simulation, energy efficiency optimization analysis, fault early warning, and FMECA analysis of the digital twin system of the liquid hydrogen production equipment, the system fully demonstrates the automatic monitoring, processing analysis, and fault early warning of the operating status of the liquid hydrogen production equipment in the physics department. It can intuitively and in real-time display the operating status of the liquid hydrogen production equipment, effectively ensuring the operational safety of the liquid hydrogen production equipment and the safety of on-site personnel.

[0005] To achieve the above-mentioned objectives, this invention provides a liquid hydrogen production system based on a digital twin, comprising liquid hydrogen production equipment, a digital twin system corresponding to the liquid hydrogen production equipment, a twin data platform communicatively connected to the liquid hydrogen production equipment and the digital twin system, and an application service platform communicatively connected to the twin data platform. The liquid hydrogen production equipment is used to measure and collect its own data information and transmit the data information to the twin data platform. The twin data platform is used to establish network communication between the liquid hydrogen production equipment and the digital twin system. The digital twin system is used to construct a model and model library of the liquid hydrogen production equipment based on the data information measured and collected by the liquid hydrogen production equipment. The application service platform is used to establish network communication with the twin data platform based on big data, IoT, AI, and 5G communication technologies. The application service platform includes components communicatively connected to the twin data platform. The platform includes a remote online monitoring service module, a dynamic control service module, an energy efficiency optimization analysis service module, and a fault early warning and FMECA analysis service module. The remote online monitoring service module acquires real-time operational status data of the liquid hydrogen production equipment, monitors its safety status, and issues alarms for abnormal data. The dynamic control service module constructs control rules for the liquid hydrogen production equipment's controller based on its dynamic control rules. The energy efficiency optimization analysis service module acquires historical data from the long-term operation of the liquid hydrogen production equipment, compares the equipment's operating sequence, sub-task execution sequence, and interaction sequence based on this data, and adjusts the global optimization operating parameters of the digital twin system of the liquid hydrogen production equipment according to the differences. The fault early warning and FMECA analysis service module simulates and generates fault data and performs fault analysis on the liquid hydrogen production device.

[0006] In one embodiment of the present invention, the alarm types of the remote online monitoring service module include one or more of the following: compressor monitoring alarm, power supply monitoring alarm, turbine expander monitoring alarm, cryogenic container monitoring alarm, cold box vacuum monitoring alarm, hydrogen leakage alarm, system overpressure monitoring alarm, and smoke alarm.

[0007] In one embodiment of the present invention, the model of the liquid hydrogen production equipment constructed by the digital twin system includes a sensor model and an electrical component model. The electrical component model includes a compressor model, a cold box model, a cryogenic container model, a connecting pipeline model, and a valve model constructed sequentially. The digital twin system selects corresponding connection component modules to connect the sub-models according to the connection characteristics of each part of the liquid hydrogen production equipment, thereby completing the construction of the model of the liquid hydrogen production equipment. Furthermore, according to the actual function and operational requirements of the liquid hydrogen production equipment, the sensor model and the electrical component model are installed in corresponding positions, and the constructed sensor model and the electrical component model are stored in the model library of the liquid hydrogen production equipment.

[0008] In one embodiment of the present invention, the digital twin system includes a sensor data module and an actuator module communicatively connected to the sensor data module. The actuator module is used to control the operation of the digital twin system based on the sensor data transmitted by the sensor data module. The digital twin system forms a communicative connection with the twin data platform through the sensor data module.

[0009] In one embodiment of the present invention, the liquid hydrogen production equipment includes a main controller and a main actuator communicatively connected to the main controller, a temperature sensor, a pressure sensor, a flow meter, a valve position sensor, a speed sensor, a humidity sensor, a level gauge, a camera, a hydrogen concentration sensor, a trace detection sensor, and a smoke alarm; wherein,

[0010] The main actuator is used to receive control signals from the main controller to control the operation of the liquid hydrogen production equipment;

[0011] The temperature sensor is used to collect temperature information of key reference numbers of the liquid hydrogen production equipment under the control of the main controller, and send the temperature information to the main controller;

[0012] The pressure sensor is used to collect pressure information of key reference numbers of the liquid hydrogen production equipment under the control of the main controller, and send the pressure information to the main controller;

[0013] The flow meter is used to collect flow information of key tags of the liquid hydrogen production equipment under the control of the main controller, and send the flow information to the main controller;

[0014] The valve position sensor is used to collect valve position information of the valves of the liquid hydrogen production equipment under the control of the main controller, and send the valve position information to the main controller;

[0015] The speed sensor is used to collect the speed information of the key reference number of the liquid hydrogen production equipment under the control of the main controller, and send the speed information to the main controller;

[0016] The humidity sensor is used to collect humidity information of key reference numbers of the liquid hydrogen production equipment under the control of the main controller, and send the humidity information to the main controller.

[0017] The level gauge is used to collect the level information of the key tag of the liquid hydrogen production equipment under the control of the main controller, and send the level information to the main controller;

[0018] The camera is used to collect video image information of the surrounding environment of the liquid hydrogen production equipment under the control of the main controller, and send the video image information to the main controller;

[0019] The hydrogen concentration sensor is used to collect hydrogen concentration information of key references of the liquid hydrogen production equipment under the control of the main controller, and send the hydrogen concentration information to the main controller.

[0020] The trace detection sensor is used to collect the concentration information of nitrogen, water and hydrocarbons in the liquid hydrogen production equipment under the control of the main controller, and send the concentration information to the main controller;

[0021] The smoke alarm is used to collect smoke information around the liquid hydrogen production equipment under the control of the main controller, and send the smoke information to the main controller.

[0022] In one embodiment of the present invention, the liquid hydrogen production equipment further includes a data storage device communicatively connected to the main controller. The data storage device is used to store control information sent by the main controller and to store data information measured by the temperature sensor, the pressure sensor, the flow meter, the valve position sensor, the speed sensor, the humidity sensor, the level gauge, the camera, the hydrogen concentration sensor, the trace detection sensor, and the smoke alarm.

[0023] In one embodiment of the present invention, the liquid hydrogen production equipment further includes a wireless communication device, which is used to establish network communication between the liquid hydrogen production equipment and the twin data platform.

[0024] In one embodiment of the present invention, the liquid hydrogen production equipment further includes an uninterruptible power supply (UPS), which is used to provide emergency power to the main controller in the event of a power outage.

[0025] In one embodiment of the present invention, the liquid hydrogen production system based on digital twin further includes a power supply system for supplying power to the liquid hydrogen production equipment, the twin data platform, and the service application platform.

[0026] This invention is the first to apply digital twin technology to the field of hydrogen energy, disclosing a liquid hydrogen production system based on digital twins. Based on the physics department of the liquid hydrogen production equipment, a digital twin system of the equipment is intuitively established. Data from various sensors on the equipment, including pressure sensors, temperature sensors, flow meters, tachometers, hydrogen concentration sensors, and remote cameras, is simultaneously displayed on the digital twin system using big data, IoT, AI, and 5G communication technologies. Through remote monitoring, dynamic simulation, energy efficiency optimization analysis, fault early warning, and FMECA analysis services, the system fully demonstrates the operating status, processing analysis, and automatic monitoring and early warning capabilities of the liquid hydrogen production equipment. This invention features excellent interactivity and high visualization, enabling a direct and real-time display of the liquid hydrogen production equipment's operating status, effectively ensuring the operational safety of the equipment and the safety of on-site personnel.

[0027] The further objects and advantages of the invention will become fully apparent from the following description and accompanying drawings. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the liquid hydrogen production system based on digital twin according to a preferred embodiment of the present invention.

[0029] The reference numerals in the attached diagrams are as follows: 1. Liquid hydrogen production equipment; 2. Digital twin system; 3. Main controller; 4. Main actuator; 5. Sensor data module; 6. Actuator; 7. Twin data platform; 8. Service application platform. Detailed Implementation

[0030] The following description is intended to disclose the present invention and enable those skilled in the art to implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0031] Those skilled in the art should understand that, in the disclosure of this invention, the terms "vertical," "horizontal," "up," "down," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0032] It is understood that the term "a" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element can be one, while in another embodiment, the number of the element can be multiple, and the term "a" should not be understood as a limitation on the number.

[0033] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] This invention addresses the problems existing in existing technologies by applying digital twin technology to the field of hydrogen energy for the first time. It proposes a liquid hydrogen production system based on digital twins, fully utilizing data from physical models, sensor updates, and operational history. It integrates multi-disciplinary, multi-physical-quantity, multi-scale, and multi-probabilistic simulation processes, mapping these processes in a virtual space. Through remote monitoring, dynamic simulation, energy efficiency optimization analysis, fault early warning, and FMECA (Failure Mode, Effects, and Criticality Analysis) services, it fully demonstrates the automatic monitoring, processing analysis, and fault early warning of the liquid hydrogen production equipment's operational status. Based on big data, IoT, AI, and 5G communication technologies, this invention offers excellent interactive features and high visualization, providing a direct and real-time view of the liquid hydrogen production equipment's operational status, effectively ensuring the operational safety of the equipment and the safety of on-site personnel.

[0035] Specifically, such as Figure 1As shown, the digital twin-based liquid hydrogen production system includes a liquid hydrogen production device 1, a digital twin system 2 corresponding to the liquid hydrogen production device 1, a twin data platform 7 communicatively connected to the liquid hydrogen production device 1 and the digital twin system 2, and an application service platform communicatively connected to the twin data platform 7. The liquid hydrogen production device 1 measures and collects its own data and transmits the data to the twin data platform 7. The twin data platform 7 establishes network communication between the liquid hydrogen production device 1 and the digital twin system 2. The digital twin system 2 constructs a model and model library of the liquid hydrogen production device 1 based on the data measured and collected by the liquid hydrogen production device 1. The application service platform establishes network communication with the twin data platform 7 based on big data, IoT, AI, and 5G communication technologies. The application service platform includes components communicatively connected to the twin data platform. The system comprises a remote online monitoring service module, a dynamic control service module, an energy efficiency optimization analysis service module, and a fault early warning and FMECA analysis service module. The remote online monitoring service module is used to acquire real-time operating status data of the liquid hydrogen production equipment 1, monitor the safety status of the liquid hydrogen production equipment 1 in real time, and issue alarms for abnormal data. The dynamic control service module is used to construct the control law of the controller of the liquid hydrogen production equipment 1 based on the dynamic control law of the liquid hydrogen production equipment 1. The energy efficiency optimization analysis service module is used to acquire historical data of the long-term operation of the liquid hydrogen production equipment 1, and compare the operating sequence, sub-task execution sequence, and interaction sequence of the liquid hydrogen production equipment 1 based on the historical data. Based on the comparison differences, it adjusts the global optimized operating parameters of the digital twin system 2 of the liquid hydrogen production equipment 1. The fault early warning and FMECA analysis service module is used to simulate and generate fault data and perform fault analysis on the liquid hydrogen production device.

[0036] It is understood that, since the application service platform of the present invention is used to establish network communication with the twin data platform 7 based on big data, Internet of Things, artificial intelligence and 5G communication technology, the present invention has good interaction means and high visualization, and can intuitively and in real time display the operating status of the liquid hydrogen production equipment 1, effectively ensuring the operational safety of the liquid hydrogen production equipment 1 and the safety of on-site operators.

[0037] It is also understood that this invention, by utilizing data such as physical models, sensor updates, and operational history, integrates multi-disciplinary, multi-physical-quantity, multi-scale, and multi-probability simulation processes to complete mapping in virtual space. Through remote monitoring, dynamic simulation, energy efficiency optimization analysis, fault early warning, and FMECA analysis of the digital twin system 2, it can fully demonstrate the automatic monitoring, processing analysis, and fault early warning of the operating status of the liquid hydrogen production equipment 1. It can remotely and effectively predict potential faults or aging problems in the liquid hydrogen production equipment 1, ensuring the operational safety of the liquid hydrogen production equipment 1, and also reducing the cost required for large-scale on-site maintenance of the liquid hydrogen production equipment 1.

[0038] It is worth mentioning that the liquid hydrogen production equipment 1 is a physical liquid hydrogen production equipment 1 or a physical hydrogen liquefaction device. It can be a hydrogen liquefaction system based on a helium refrigeration cycle or a hydrogen liquefaction system based on a hydrogen refrigeration cycle. The present invention does not limit this.

[0039] Furthermore, the liquid hydrogen production equipment 1 has data signal measurement, acquisition, and transmission functions, and includes a main controller 3 and a main actuator 4 communicatively connected to the main controller 3, a temperature sensor, a pressure sensor, a flow meter, a valve position sensor, a speed sensor, a humidity sensor, a level gauge, a camera, a hydrogen concentration sensor, a trace detection sensor, and a smoke alarm; wherein,

[0040] The main actuator 4 is used to receive the control signal from the main controller 3 to control the operation of the liquid hydrogen production equipment 1;

[0041] The temperature sensor is used to collect the temperature information of the key reference of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the temperature information to the main controller 3;

[0042] The pressure sensor is used to collect pressure information of the key reference number of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the pressure information to the main controller 3;

[0043] The flow meter is used to collect the flow information of the key tag of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the flow information to the main controller 3;

[0044] The valve position sensor is used to collect valve position information of the valves of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the valve position information to the main controller 3;

[0045] The speed sensor is used to collect the speed information of the key reference of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the speed information to the main controller 3;

[0046] The humidity sensor is used to collect humidity information of key references of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the humidity information to the main controller 3;

[0047] The level gauge is used to collect the level information of the key position of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the level information to the main controller 3;

[0048] The camera is used to collect video image information of the surrounding environment of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the video image information to the main controller 3;

[0049] The hydrogen concentration sensor is used to collect hydrogen concentration information of key references of the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the hydrogen concentration information to the main controller 3;

[0050] The trace detection sensor is used to collect the concentration information of nitrogen, water and hydrocarbons in the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the concentration information to the main controller 3;

[0051] The smoke alarm is used to collect smoke information around the liquid hydrogen production equipment 1 under the control of the main controller 3, and send the smoke information to the main controller 3.

[0052] Furthermore, the liquid hydrogen production equipment 1 also includes a data storage device communicatively connected to the main controller 3. The data storage device is used to store control information sent by the main controller 3, and to store data information measured by the temperature sensor, the pressure sensor, the flow meter, the valve position sensor, the speed sensor, the humidity sensor, the level gauge, the camera, the hydrogen concentration sensor, the trace detection sensor, and the smoke alarm.

[0053] Furthermore, the liquid hydrogen production equipment 1 also includes a wireless communication device, which is used to establish network communication between the liquid hydrogen production equipment 1 and the twin data platform 7.

[0054] Furthermore, the liquid hydrogen production equipment 1 also includes an uninterruptible power supply (UPS), which is used to provide emergency power to the main controller 3 in the event of a power outage, ensuring the safe and stable operation of the liquid hydrogen production equipment 1.

[0055] Furthermore, the liquid hydrogen production equipment 1 also includes an operating status data analysis module. The remote online monitoring service module acquires the operating status data of the liquid hydrogen production equipment 1 from the operating status data analysis module in real time, monitors the safety status of the liquid hydrogen production equipment 1 in real time, and alarms for abnormal data. The alarm types include one or more of the following: compressor monitoring alarm, power supply monitoring alarm, turbine expander monitoring alarm, cryogenic container monitoring alarm, cold box vacuum monitoring alarm, hydrogen leakage alarm, system overpressure monitoring alarm, and smoke alarm.

[0056] Furthermore, the dynamic control service module determines the input, output, and control relationship of the main controller 3 according to the type of the main controller 3; constructs the control law of the main controller 3 according to the dynamic control law of the liquid hydrogen production equipment 1; standardizes the control requirements according to the current control requirements and uses them as the input of the controller; obtains the output of the main controller 3 and applies it to the liquid hydrogen production equipment 1; obtains the state of the liquid hydrogen production equipment 1 after the main controller 3 has applied it and inputs it to the main controller 3.

[0057] Furthermore, the energy efficiency optimization analysis service module analyzes and obtains the long-term operating history data of the liquid hydrogen production equipment 1 based on actual conditions, compares the operating sequence, sub-task execution sequence, and interaction sequence of the liquid hydrogen production equipment 1, and adjusts the global optimization operating parameters of the digital twin system 2 according to the comparison differences to achieve energy efficiency optimization.

[0058] Furthermore, the fault early warning and FMECA analysis service module simulates and generates fault data based on historical data or literature surveys for each type of fault and combinations thereof, uses neural network prediction to complete the acquisition of fault data, and conducts FMECA analysis on this basis. Through FMECA analysis, component failures that have a significant impact on the system, as well as various defects and weaknesses that affect product reliability, can be discovered, providing a basis for improving the quality and reliability of the liquid hydrogen production equipment 1.

[0059] Furthermore, the model of the liquid hydrogen production equipment 1 constructed by the digital twin system 2 includes sensor models and electrical component models. The electrical component models include a compressor model, a cold box model, a cryogenic container model, a connecting pipeline model, and a valve model constructed sequentially. Based on the connection characteristics of each part of the liquid hydrogen production equipment 1, the digital twin system 2 selects corresponding connection component modules to connect the sub-models, thereby completing the construction of the model of the liquid hydrogen production equipment 1. According to the actual function and operational requirements of the liquid hydrogen production equipment 1, the sensor models and electrical component models are installed in corresponding positions, and the constructed sensor models and electrical component models are stored in the model library of the liquid hydrogen production equipment 1.

[0060] Specifically, the digital twin system 2 follows the order of compressor model, cold box model, cryogenic container model, connecting pipeline model, and valve model; based on the actual connection characteristics of each part of the liquid hydrogen production equipment 1, different connection component models are selected to connect the sub-models to complete the construction of the liquid hydrogen production equipment 1 model; according to the actual function or actual operation requirements of the liquid hydrogen production equipment 1, the sensor model and the electrical component model are installed in corresponding positions; and the constructed individual sub-models and the liquid hydrogen production equipment 1 model are stored in the liquid hydrogen production equipment 1 model library.

[0061] Furthermore, the digital twin system 2 includes a sensor data module 5 and an actuator 6 module communicatively connected to the sensor data module 5. The actuator 6 module is used to control the operation of the digital twin system 2 based on the sensor data transmitted by the sensor data module 5. The digital twin system 2 forms a communicative connection with the twin data platform 7 through the sensor data module 5.

[0062] It is worth mentioning that the liquid hydrogen production system based on digital twin also includes a power supply system, which is used to supply power to the liquid hydrogen production equipment 1, the twin data platform 7 and the service application platform 8.

[0063] In summary, the digital twin-based liquid hydrogen production system intuitively establishes a corresponding digital twin system 2 based on the liquid hydrogen production equipment 1 in a physical system. It synchronously displays sensor data from various pressure sensors, temperature sensors, flow meters, tachometers, hydrogen concentration sensors, and remote cameras on the liquid hydrogen production equipment 1 on the digital twin system 2 using technologies such as big data, the Internet of Things, artificial intelligence, and 5G communication. Through remote monitoring, dynamic simulation, energy efficiency optimization analysis, fault early warning, and FMECA analysis services of the digital twin system 2, the system fully demonstrates the operating status, processing analysis, and automatic monitoring and early warning of the liquid hydrogen production equipment 1. This invention features good interactive methods and high visualization, enabling intuitive and real-time display of the operating status of the liquid hydrogen production equipment 1, effectively ensuring the operational safety of the liquid hydrogen production equipment 1 and the safety of on-site personnel.

[0064] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0065] The above embodiments merely illustrate preferred implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention should be determined by the appended claims.

Claims

1. A liquid hydrogen production system based on digital twinning, characterized in that The system includes a liquid hydrogen production device, a digital twin system corresponding to the liquid hydrogen production device, a twin data platform communicatively connected to the liquid hydrogen production device and the digital twin system, and an application service platform communicatively connected to the twin data platform. The liquid hydrogen production device is used to measure and collect its own data information and transmit the data information to the twin data platform. The twin data platform is used to establish network communication between the liquid hydrogen production device and the digital twin system. The digital twin system is used to construct a model and model library of the liquid hydrogen production equipment based on the data information measured and collected by the liquid hydrogen production equipment; the application service platform is used to establish network communication with the twin data platform based on big data, Internet of Things, artificial intelligence and 5G communication technology, and the application service platform includes a remote online monitoring service module, a dynamic control service module, an energy efficiency optimization analysis service module and a fault early warning and FMECA analysis service module that can be communicatively connected to the twin data platform; The remote online monitoring service module is used to acquire real-time operating status data of the liquid hydrogen production equipment, monitor the safety status of the liquid hydrogen production equipment in real time, and issue alarms for abnormal data; the dynamic control service module is used to construct the control law of the controller of the liquid hydrogen production equipment based on the dynamic control law of the liquid hydrogen production equipment; the energy efficiency optimization analysis service module is used to acquire historical data of the long-term operation of the liquid hydrogen production equipment, and compare the operating sequence, sub-task execution sequence, and interaction sequence of the liquid hydrogen production equipment based on historical data, and adjust the global optimization operating parameters of the digital twin system of the liquid hydrogen production equipment according to the comparison differences; the fault early warning and FMECA analysis service module is used to simulate and generate fault data and perform fault analysis on the liquid hydrogen production device; the alarm types of the remote online monitoring service module include compressor monitoring alarm, power supply alarm, etc. The system includes one or more of the following: monitoring alarms, turbine expander monitoring alarms, cryogenic container monitoring alarms, cold box vacuum monitoring alarms, hydrogen leak alarms, system overpressure monitoring alarms, and smoke alarms; the model of the liquid hydrogen production equipment constructed by the digital twin system includes sensor models and electrical component models; the electrical component models include, in sequence, compressor models, cold box models, cryogenic container models, connecting pipeline models, and valve models; the digital twin system selects appropriate connection component modules to connect the sub-models according to the connection characteristics of each part of the liquid hydrogen production equipment, thereby completing the construction of the model of the liquid hydrogen production equipment; and according to the actual function and operating requirements of the liquid hydrogen production equipment, the sensor models and electrical component models are installed in corresponding positions, and the constructed sensor models and electrical component models are stored in the model library of the liquid hydrogen production equipment.

2. The digital-twin-based liquid hydrogen production system according to claim 1, characterized in that, The digital twin system includes a sensor data module and an actuator module communicatively connected to the sensor data module. The actuator module is used to control the operation of the digital twin system based on the sensor data transmitted by the sensor data module. The digital twin system forms a communicative connection with the twin data platform through the sensor data module.

3. The liquid hydrogen production system based on digital twins according to any one of claims 1 to 2, characterized in that, The liquid hydrogen production equipment includes a main controller and a main actuator communicatively connected to the main controller, a temperature sensor, a pressure sensor, a flow meter, a valve position sensor, a speed sensor, a humidity sensor, a level gauge, a camera, a hydrogen concentration sensor, a trace detection sensor, and a smoke alarm; wherein, The main actuator is used to receive control signals from the main controller to control the operation of the liquid hydrogen production equipment; The temperature sensor is used to collect temperature information of key reference numbers of the liquid hydrogen production equipment under the control of the main controller, and send the temperature information to the main controller; The pressure sensor is used to collect pressure information of key reference numbers of the liquid hydrogen production equipment under the control of the main controller, and send the pressure information to the main controller; The flow meter is used to collect flow information of key tags of the liquid hydrogen production equipment under the control of the main controller, and send the flow information to the main controller; The valve position sensor is used to collect valve position information of the valves of the liquid hydrogen production equipment under the control of the main controller, and send the valve position information to the main controller; The speed sensor is used to collect the speed information of the key reference number of the liquid hydrogen production equipment under the control of the main controller, and send the speed information to the main controller; The humidity sensor is used to collect humidity information of key reference numbers of the liquid hydrogen production equipment under the control of the main controller, and send the humidity information to the main controller. The level gauge is used to collect the level information of the key tag of the liquid hydrogen production equipment under the control of the main controller, and send the level information to the main controller; The camera is used to collect video image information of the surrounding environment of the liquid hydrogen production equipment under the control of the main controller, and send the video image information to the main controller; The hydrogen concentration sensor is used to collect hydrogen concentration information of key references of the liquid hydrogen production equipment under the control of the main controller, and send the hydrogen concentration information to the main controller. The trace detection sensor is used to collect the concentration information of nitrogen, water and hydrocarbons in the liquid hydrogen production equipment under the control of the main controller, and send the concentration information to the main controller; The smoke alarm is used to collect smoke information around the liquid hydrogen production equipment under the control of the main controller, and send the smoke information to the main controller.

4. The liquid hydrogen production system based on digital twins according to claim 3, characterized in that, The liquid hydrogen production equipment also includes a data storage device communicatively connected to the main controller. The data storage device is used to store control information sent by the main controller and to store data information measured by the temperature sensor, the pressure sensor, the flow meter, the valve position sensor, the speed sensor, the humidity sensor, the level gauge, the camera, the hydrogen concentration sensor, the trace detection sensor, and the smoke alarm.

5. The liquid hydrogen production system based on digital twins according to claim 3, characterized in that, The liquid hydrogen production equipment also includes a wireless communication device, which is used to establish network communication between the liquid hydrogen production equipment and the twin data platform.

6. The liquid hydrogen production system based on digital twins according to claim 3, characterized in that, The liquid hydrogen production equipment also includes an uninterruptible power supply (UPS), which is used to provide emergency power to the main controller in the event of a power outage.

7. The liquid hydrogen production system based on digital twins according to claim 5, characterized in that, The digital twin-based liquid hydrogen production system also includes a power supply system for supplying power to the liquid hydrogen production equipment, the digital twin data platform, and the application service platform.

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