Digital twin test platform and method for marine methanol fuel power system

Abstract

The embodiment of the invention discloses a digital twin test platform and method for a marine methanol fuel power system, and the method comprises the steps: setting the initial operation parameters of the marine methanol fuel power system, including the number of engine cylinders, the diameter of the cylinders, the stroke, the methanol injection amount and the like, through an operation interaction module, and inputting a user operation command; and setting ship navigation working condition parameters including the navigational speed, the wind speed, the wind direction, the wave height and the like, transmitting the parameters to the logic core module, carrying out real-time simulation operation by combining a ship methanol fuel power system mathematical model library and a ship methanol fuel power system virtual twin three-dimensional model library, and carrying out multi-dimensional analysis through real-time simulation data, so as to obtain a simulation result. And a multi-dimensional analysis result and a performance index of the methanol fuel power system are obtained, so that testing of the marine methanol fuel power system is realized. According to the method, the whole operation process of the marine methanol fuel power system under different navigation working conditions can be visually and completely displayed in the virtual environment, and the method can adapt to the complex navigation working conditions of the ship.

Description

Technical Field

[0001] This invention relates to the field of digital twin technology, and in particular to a digital twin testing platform and method for a marine methanol fuel power system. Background Technology

[0002] Under the "dual-carbon" strategy, the energy structure transformation in the transportation sector is accelerating, and exploring clean and efficient alternative fuels for ships has become a core demand for industry development. Methanol, as a low-carbon fuel, has significant advantages such as wide availability and low carbon emissions, and is widely considered an important transitional fuel adaptable to the iteration of internal combustion engine technology, with enormous application potential in marine propulsion. However, the physicochemical properties of methanol fuel differ significantly from traditional fuels, posing significant challenges to the development of marine methanol-fueled propulsion systems. Currently, the development of marine methanol-fueled propulsion systems still relies primarily on traditional physical bench experiments. This approach not only suffers from long development cycles and high costs, but also struggles to simulate the operating status of the propulsion system under multi-parameter coupling and complex navigation conditions in real time. Therefore, there is an urgent need for a dedicated digital twin testing platform that can accurately match the characteristics of methanol, integrate ship operating conditions, and ensure efficient collaboration among various modules. Summary of the Invention

[0003] This invention discloses a digital twin testing platform and method for marine methanol fuel power systems to overcome the aforementioned technical problems.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: A digital twin test platform for a marine methanol fuel power system includes: an operation interaction module and a logic core module; The operation interaction module includes a parameter configuration unit, a working condition control unit, and an interaction feedback unit; The parameter configuration unit is used to set the initial operating parameters of the marine methanol fuel power system, including the number of engine cylinders, cylinder diameter, stroke, and methanol injection quantity, so as to realize the full-dimensional parameter configuration of the marine methanol fuel power system. The operating condition control unit is used to input user operation commands and set the ship's navigation operating condition parameters, including speed, wind speed and direction, and wave height, so as to achieve dynamic adjustment of the ship's navigation operating conditions. The interactive feedback unit is used to provide feedback on the real-time operating parameters of the marine methanol fuel power system, the ship's navigation condition parameters, and the real-time simulation data output through the logic core module. The core logic module includes a model building unit, a real-time computing unit, and a calculation result analysis unit; The model building unit is used to build a mathematical model library for marine methanol fuel power systems and a virtual twin three-dimensional model library for marine methanol fuel power systems. The real-time computing unit is used to perform real-time simulation calculations and obtain real-time simulation data based on the initial operating parameters of the methanol fuel power system, the ship's navigation condition parameters, the mathematical model library of the marine methanol fuel power system, and the virtual twin three-dimensional model library of the marine methanol fuel power system. The calculation result analysis unit is used to perform multi-dimensional analysis based on real-time simulation data, and obtain the results of the multi-dimensional analysis and the performance indicators of the methanol fuel power system.

[0005] Furthermore, the real-time simulation data includes dynamic parameters, economic parameters, combustion process parameters, and emission and thermal management parameters; The power parameters include engine speed, output torque, and effective power; the economic parameters include methanol injection quantity, fuel consumption rate, and air-fuel ratio; the combustion process parameters include cylinder pressure, peak cylinder pressure, and cylinder temperature; and the emission and thermal management parameters include exhaust temperature, exhaust back pressure, and coolant temperature.

[0006] Furthermore, the multi-dimensional analysis includes parameter trend analysis, operating condition comparison analysis, and performance optimization suggestion generation; The performance indicators include optimal air-fuel ratio, maximum effective power, minimum fuel consumption rate, emission compliance range, and optimal matching parameters corresponding to the ship's navigation conditions, including methanol injection pressure, methanol substitution rate, and compression ratio.

[0007] Furthermore, the mathematical models of marine methanol fuel power systems in the marine methanol fuel power system mathematical model library include: intake / exhaust system model, intercooler system model, turbocharger system model, and cylinder model; The intake / exhaust system model includes the continuity equation, energy conservation equation, and momentum conservation equation; the intercooler system model includes the calculation formulas for the working fluid temperature and pressure leaving the intercooler; the turbocharger system model includes the calculation formulas for the compressor parameters and turbine parameters; and the cylinder model includes the basic thermodynamic equations for the thermodynamic processes within the cylinder, the cylinder working volume calculation model, the heat transfer calculation model of the cylinder peripheral wall, and the combustion heat release rate calculation model.

[0008] Furthermore, the three-dimensional virtual twin model of the marine methanol fuel power system in the marine methanol fuel power system virtual twin model library includes a cylinder three-dimensional model, a piston three-dimensional model, a combustion chamber three-dimensional model, and an intake and exhaust valve three-dimensional model. The three-dimensional model of the cylinder is used to restore the geometric dimensions of the real cylinder. It can obtain the average temperature of the peripheral wall based on the instantaneous temperature of the working fluid and the pressure of the working fluid, so as to dynamically display the heat distribution and stress changes of the cylinder wall under different working conditions. The piston 3D model is used to recreate the piston's top shape, skirt structure, and piston ring groove structure, and is matched with the cylinder 3D model to achieve reciprocating motion simulation. The three-dimensional model of the combustion chamber is used to recreate the actual shape and volume of the combustion chamber in order to simulate the combustion process; The 3D model of the intake and exhaust valve is used to recreate the valve head shape, valve stem length, and valve guide structure to simulate the changes in valve opening angle and lift.

[0009] Furthermore, it also includes a front-end visualization module; The front-end visualization module is used to render and display the virtual twin 3D model of the marine methanol fuel power system, and at the same time display the operation process of the marine methanol fuel power system, the operating parameters of the marine methanol fuel power system, the navigation condition parameters of the ship, real-time simulation data, the results of multi-dimensional analysis, and the key performance indicators of the methanol fuel power system.

[0010] Furthermore, it also includes a data management module; The data management module includes a data storage unit, a data query and analysis unit, and a data security management unit; The data storage unit is used to build a data storage system, including data classified by data type into operating condition setting data, parameter configuration data, and simulation result data, so as to realize the classified storage of digital twin full-process data; The data query and analysis unit provides multi-dimensional data query interfaces and in-depth analysis tools, enabling users to perform multi-dimensional target data queries by time and data type in order to realize the value of data. The data security management unit is used to build a data security protection system, including data transmission encryption, storage encryption, access control, data backup and recovery, to prevent data leakage, tampering or unauthorized access, and to ensure the security of users' core data.

[0011] Furthermore, it also includes a unified data interface, including input and output interfaces: The input interface includes a user operation input interface and a parameter configuration interface; The user operation input interface is used to transmit the operation commands input by the user in the operation interaction module to the logic core module to drive the simulation calculation of the three-dimensional model of the virtual twin of the marine methanol fuel power system. The parameter configuration interface is used to provide initial conditions and constraints for the mathematical model library of marine methanol fuel power system and the three-dimensional model library of marine methanol fuel power system virtual twin through the operating condition control unit; The output interface is used to drive the front-end visualization module to render and display the virtual twin 3D model of the marine methanol fuel power system, as well as to display the operation process of the marine methanol fuel power system, the operating parameters of the marine methanol fuel power system, the navigation condition parameters of the ship, real-time simulation data, the results of multi-dimensional analysis, and the key performance indicators of the methanol fuel power system.

[0012] Furthermore, the operation commands include start / stop commands, speed setting commands, component control commands, and emergency reset commands.

[0013] A testing method for a digital twin test platform for a marine methanol fuel power system includes the following steps: S91, Platform Initialization Phase: Users set the initial operating parameters of the marine methanol fuel power system through the parameter configuration unit of the operation interaction module, including the number of engine cylinders, cylinder diameter, stroke, and methanol injection quantity; and synchronize this to the model building unit of the logic core module; then, through the operating condition control unit of the operation interaction module, users set the ship's navigation operating condition parameters, including speed, wind speed and direction, and wave height; and synchronize this to the real-time calculation unit of the logic core module. S92. Simulation Start-up and Operating Condition Simulation Stage: The user sends a start command through the operation interaction module, and the real-time computing unit of the logic core module drives the virtual twin three-dimensional model of the marine methanol fuel power system to run based on the input parameters. S93. Real-time monitoring and data acquisition stage: The front-end visualization module dynamically renders the virtual twin 3D model of the marine methanol fuel power system and displays the real-time simulation data through the dashboard and trend chart; the data management module synchronously stores the real-time simulation data. S94. Result Analysis and Optimization Stage: The calculation result analysis unit of the logic core module performs multi-dimensional processing on the real-time simulation data to generate performance indicators and operating condition comparison reports. S95. Test Termination and Data Export Phase: The user sends a stop command through the operation interaction module, and the digital twin test platform for the marine methanol fuel power system safely shuts down the simulation process, completing the test of the marine methanol fuel power system.

[0014] Beneficial Effects: The present invention provides a digital twin testing platform and method for a marine methanol fuel power system. Through an interactive operation module, initial operating parameters of the marine methanol fuel power system, including the number of engine cylinders, cylinder diameter, stroke, and methanol injection quantity, are set. These parameters are used to input user operation commands and set navigation condition parameters of the vessel, including speed, wind speed and direction, and wave conditions. These parameters are then transmitted to the logic core module. Combining a mathematical model library and a virtual twin 3D model library for the marine methanol fuel power system, real-time simulation calculations are performed. Multi-dimensional analysis is conducted using real-time simulation data to obtain the results and performance indicators of the methanol fuel power system, thus enabling the testing of the marine methanol fuel power system. This invention, based on digital twin technology, constructs a digital twin test platform that integrates the physical and logical relationship model of ship navigation scenarios and power systems. It can intuitively and completely display the entire operation process of marine methanol fuel power systems under different navigation conditions in a virtual environment. It can adapt to complex ship navigation conditions and fully present the working characteristics, operating rules, and adaptability performance of marine methanol power systems under different navigation conditions. It solves the problems of long development cycles and high development costs in the current research and development of marine methanol fuel power systems, which mainly rely on traditional physical bench experiments. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a diagram of the digital twin test platform architecture for the marine methanol fuel power system of the present invention. Figure 2 This is a diagram of the marine methanol fuel power system architecture in an embodiment of the present invention; Figure 3 This is a schematic diagram of the testing process of the digital twin test platform for marine methanol fuel power system in an embodiment of the present invention. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] This embodiment introduces a digital twin test platform for a marine methanol fuel power system, such as... Figure 1 and Figure 2 As shown, the platform includes a front-end visualization module, an operation interaction module, a logic core module, and a data management module. These modules communicate with each other through a unified data interface. The platform employs digital twin technology to construct a digital twin that maps the physical characteristics, operating mechanisms, and all elements of the ship's navigation conditions to the marine methanol fuel power system. This enables real-time simulation, parameter monitoring, dynamic simulation, data analysis, and performance testing of the power system's operating status.

[0019] The operation interaction module provides a complete user input interface, accurately transmitting user operations to the core logic module. It includes a parameter configuration unit, a working condition control unit, and an interactive feedback unit. The parameter configuration unit is used to set the initial operating parameters of the marine methanol fuel power system, including the number of engine cylinders, cylinder diameter, stroke, methanol injection quantity, etc., so as to realize the full-dimensional parameter configuration of the marine methanol fuel power system. Specifically, the parameter configuration unit provides standardized and modular parameter input interfaces, supporting full-dimensional parameter configuration for marine methanol fuel power systems, and providing basic data support for simulation calculations and virtual mapping. After parameter configuration is completed, these parameter data are synchronized to the model building unit of the logic core module via a unified data interface; The operating condition control unit is used to input user operation commands and set the ship's navigation operating condition parameters, including speed, wind speed and direction, wave height, etc., so as to realize the dynamic adjustment of the ship's navigation operating conditions. Specifically, the operating condition control unit is responsible for simulating the actual operating scenarios of the ship, supporting users to dynamically adjust the ship's navigation conditions. The ship's navigation condition parameters are transmitted in real time to the real-time computing unit of the logic core module through a unified data interface, driving the virtual twin model to update its operating status.

[0020] The interactive feedback unit is used to provide real-time feedback on the operating parameters of the marine methanol fuel power system, the navigation condition parameters of the ship, and the real-time simulation data output through the logic core module, so as to reduce the error rate. Specifically, the interactive feedback unit is responsible for providing real-time feedback on the simulation operation status and the running results of the virtual twin, ensuring that users can keep abreast of the platform's operation and reduce the error rate.

[0021] The core logic module includes a model building unit, a real-time computing unit, and a calculation result analysis unit; The model building unit is used to build a mathematical model library for marine methanol fuel power systems and a virtual twin three-dimensional model library for marine methanol fuel power systems. Specifically, the model building unit adapts to the initial parameters of the marine methanol fuel power system and supports the access of third-party models, providing underlying model support for simulation calculations; The real-time computing unit is used to perform real-time simulation calculations and obtain real-time simulation data based on the initial operating parameters of the methanol fuel power system, the ship's navigation condition parameters, the mathematical model library of the marine methanol fuel power system, and the virtual twin three-dimensional model library of the marine methanol fuel power system. Preferably, the real-time simulation data includes dynamic parameters, economic parameters, combustion process parameters, and emission and thermal management parameters; The power parameters include engine speed, output torque, and effective power; the economic parameters include methanol injection quantity, fuel consumption rate, and air-fuel ratio; the combustion process parameters include cylinder pressure, peak cylinder pressure, and cylinder temperature; and the emission and thermal management parameters include exhaust temperature, exhaust back pressure, and coolant temperature.

[0022] Specifically, the real-time computing unit is based on the constructed mathematical model library of marine methanol fuel power system and the virtual twin three-dimensional model library of marine methanol fuel power system. It performs real-time simulation calculations based on the initial parameters of the methanol fuel power system and the navigation condition parameters of the ship obtained through the operation interaction module, and outputs the results for other modules to call: outputting real-time simulation data to the calculation result analysis unit and the front-end visualization module. The calculation result analysis unit is used to perform multi-dimensional analysis based on the output results and obtain the key performance indicators of the methanol fuel power system.

[0023] Preferably, the multi-dimensional analysis includes parameter trend analysis, operating condition comparison analysis, and performance optimization suggestion generation; The key performance indicators include optimal air-fuel ratio, maximum effective power, minimum fuel consumption rate, emission compliance range, and optimal matching parameters corresponding to the ship's navigation conditions, including parameters such as methanol injection pressure, methanol substitution rate, and compression ratio.

[0024] Specifically, the calculation result analysis unit is responsible for performing multi-dimensional analysis on the calculation results output by the real-time computing unit, extracting key performance indicators of the marine methanol power system, and providing users with decision-making basis. This multi-dimensional analysis includes parameter trend analysis, operating condition comparison analysis, and performance optimization suggestion generation. Key performance indicator extraction includes optimal air-fuel ratio, maximum effective power, minimum fuel consumption rate, emission compliance range, and optimal adaptation parameters under different operating conditions. The analysis results are presented in a combination of charts and text, allowing users to quickly obtain core information.

[0025] The mathematical models in the marine methanol fuel power system mathematical model library include: intake / exhaust system model, intercooler system model, turbocharger system model, and cylinder model.

[0026] The intake / exhaust system model includes the continuity equation, the energy conservation equation, and the momentum conservation equation; The continuity equation is expressed as follows: (1) In the formula: For unit working fluid mass; For time; The mass flow rate of the working fluid entering through the boundary; The density of the working fluid; The system boundary cross-sectional area; u The boundary working fluid velocity; The energy conservation equation is expressed as follows: (2) In the formula: e The total internal energy per unit mass of working fluid; For the working fluid pressure; The volume of the working fluid; The total enthalpy of the working fluid per unit mass; The heat transfer coefficient; The heat transfer surface area; , These are the working fluid temperature and the wall temperature, respectively. The momentum conservation equation is expressed as follows: (3) In the formula: The coefficient of friction of the wall surface; This is the pressure loss coefficient; The length of the unit working fluid; The unit diameter; The pressure difference is the pressure difference along the length of the working fluid in a single unit. The intercooler system model includes formulas for calculating the working fluid temperature leaving the intercooler and the working fluid pressure leaving the intercooler: The formula for calculating the temperature of the working fluid leaving the intercooler is as follows: (4) In the formula: The temperature of the working fluid leaving the intercooler; The temperature at which the working fluid leaves the compressor; The coefficient of performance is the cooling factor. To cool the working fluid temperature before it enters the intercooler; The formula for calculating the working fluid pressure leaving the intercooler is as follows: (5) In the formula: The working fluid pressure leaving the intercooler; The pressure at which the working fluid leaves the compressor; The damping coefficient; It is the acceleration due to gravity; For heat exchange area; The initial density of the working fluid after passing through the intercooler; The total mass of the working fluid after passing through the intercooler; The turbocharger system model includes calculation formulas for compressor parameters and turbine parameters. The compressor parameters include pressure ratio, equivalent flow rate, compressor equivalent speed, and compressor efficiency; The formula for calculating the boost ratio is as follows: (6) In the formula: To the pressure of the working fluid entering the compressor; To escape the working fluid pressure of the compressor; The pressure ratio is used; the formula for calculating the equivalent flow rate is as follows: (7) In the formula: The working fluid is converted to flow rate; The measured flow rate of the working fluid; Atmospheric temperature; The formula for calculating the compressor's equivalent speed is as follows: (8) In the formula: This refers to the compressor's equivalent speed. This refers to the measured speed of the compressor. The formula for calculating the compressor efficiency is as follows: (9) In the formula: For compressor efficiency; The adiabatic index; This refers to the working fluid temperature at the compressor outlet.

[0027] The turbine parameters include the expansion ratio and turbine efficiency; The formula for calculating the expansion ratio is as follows: (10) In the formula: The pressure of the working fluid leaving the turbine; The working fluid pressure entering the turbine; The expansion ratio is denoted as .

[0028] The formula for calculating the turbine efficiency is as follows: (11) In the formula: For turbine efficiency; This refers to the exhaust temperature before the turbine. The temperature of the working fluid after the turbine; The expansion ratio; The adiabatic index; The cylinder model includes the basic thermodynamic equations of the thermal processes within the cylinder, a calculation model for the cylinder working volume, a calculation model for the heat transfer of the cylinder peripheral wall, and a calculation model for the combustion heat release rate.

[0029] The fundamental thermodynamic equations for the thermal processes within the cylinder include the mass conservation equation, the energy conservation equation, and the ideal gas law. The mass conservation equation is expressed as follows: (12) In the formula: For the quality of the system working fluid; The quality of the working fluid entering the system; The mass of the working fluid leaving the system; The mass of fuel already burned in the system; This refers to the crankshaft rotation angle; The energy conservation equation is expressed as follows: (13) In the formula: It is the internal energy of the system; The heat released during fuel combustion; This represents all the heat conducted within the system. The enthalpy of the working fluid entering the system; The enthalpy of the working fluid flowing out of the system; The quality of the working fluid entering the system; The mass of the working fluid leaving the system; The pressure of the working fluid inside the cylinder; This refers to the working volume inside the cylinder; This refers to the crankshaft rotation angle; The ideal gas law is expressed as follows: (14) In the formula, It is the gas constant; The working fluid temperature; The working pressure of the gaseous medium; The volume of the gaseous working fluid; For the mass of the working gas; The cylinder working volume calculation model is expressed as follows: The change in cylinder working volume, i.e., the change in working fluid volume within the system, can be calculated using the following formula: (15) In the formula: The cylinder diameter; For the itinerary; The crank-connecting rod ratio; This refers to the crankshaft rotation angle; The instantaneous working fluid volume of the cylinder; This refers to the compression ratio; The heat transfer calculation model for the cylinder peripheral wall is as follows: used to obtain the heat dissipation rate of the working fluid in the cylinder to the cylinder peripheral wall: (16) In the formula: The total heat exchange between the working fluid and the system boundary; These are intermediate calculation parameters; The instantaneous heat transfer coefficient; Let be the instantaneous total area at the boundary, and be the sum of the areas of the cylinder head, piston crown, and cylinder liner, respectively denoted by . , , To represent; The instantaneous temperature of the working fluid; The average temperature of the peripheral walls includes the peripheral walls of the cylinder head, piston crown, and cylinder liner, and is represented by [missing information - likely a typo]. , , express; This refers to the crankshaft rotation angle; The calculation model for the combustion heat release rate is expressed as follows: (17) In the formula: The heat released during fuel combustion; The amount of fuel supplied per cycle for the engine; This refers to the crankshaft rotation angle; It is a fuel with a low calorific value; This represents the percentage of fuel burned within the system. This refers to the fuel combustion rate.

[0030] Preferably, the three-dimensional virtual twin model of the marine methanol fuel power system in the marine methanol fuel power system virtual twin model library includes a cylinder three-dimensional model, a piston three-dimensional model, a combustion chamber three-dimensional model, and an intake and exhaust valve three-dimensional model; The cylinder 3D model is used to restore the geometric dimensions of a real cylinder. It can obtain the average temperature of the peripheral wall based on the instantaneous temperature and pressure of the working fluid, so as to dynamically display the heat distribution and stress changes of the cylinder wall under different working conditions. The piston 3D model is used to restore the top shape, skirt structure and piston ring groove structure of the piston, and is matched with the cylinder 3D model to realize the simulation of reciprocating motion. The combustion chamber 3D model is used to restore the actual shape and volume of the combustion chamber to realize the simulation of the combustion process. The intake and exhaust valve 3D model is used to restore the valve head shape, valve stem length and valve guide structure to realize the simulation of the valve opening angle and lift changes.

[0031] Specifically, the virtual twin 3D model of the marine methanol fuel power system mainly includes 3D models of cylinders, pistons, combustion chambers, and intake and exhaust valves. The cylinder 3D model restores the geometry of a real cylinder, clearly showing the cylinder wall structure and its assembly relationship with the piston and cylinder head. It can be linked with the temperature and pressure data of the cylinder model to dynamically display the heat distribution and stress changes of the cylinder wall under different operating conditions. The piston 3D model restores the top shape, skirt structure, and piston ring groove design of the piston, and matches it with the cylinder 3D model to realize reciprocating motion simulation, which can intuitively show the position of the piston at different crankshaft angles. The combustion chamber 3D model restores the actual shape and volume of the combustion chamber, clearly showing the injector mounting position and spark plug layout. It can be combined with combustion data to dynamically show the flame propagation path and gas composition distribution, intuitively reflecting the combustion process. The intake and exhaust valve 3D models restore the valve head shape, valve stem length, and valve guide structure, which can clearly show the valve opening angle and lift changes.

[0032] Preferably, the front-end visualization module is used to render and display the three-dimensional model of the virtual twin of the marine methanol fuel power system, and at the same time display the operation process of the marine methanol fuel power system, the operating parameters of the marine methanol fuel power system, the navigation condition parameters of the ship, real-time simulation data, the results of multi-dimensional analysis, and the key performance indicators of the methanol fuel power system.

[0033] Specifically, the front-end visualization module, serving as the direct user interaction window, can present the operating parameters of the methanol fuel power system and the ship's navigation conditions in real time through both numerical and graphical methods, ensuring consistency between parameter display and three-dimensional dynamic changes. It is responsible for rendering the 3D virtual twin model of the marine methanol fuel power system and displaying the user interface. It can render a 3D virtual twin model of the marine methanol fuel power system that is identical to the physical system, including cylinders, pistons, combustion chambers, intake and exhaust valves, etc. The 3D virtual twin model of the marine methanol fuel power system is consistent with the structure, dimensions, and motion laws of the physical system, dynamically displaying the working process of the system. It supports 360° rotation and zooming of the virtual twin model, making the structure of each component clearer; it also supports double-clicking to reset the view, displaying a half-section side view, showing both the external structure and the internal movement of the cylinders, enabling detailed observation and status monitoring of the twin. This module dynamically displays the operation of the power system, including the reciprocating motion of the piston in the cylinder, the opening and closing status of the intake and exhaust valves, the gas state in the combustion chamber (simulating combustion chamber operation through changes in gas color), and the status of methanol fuel injection (methanol injection time and process), helping users better understand the internal physical and chemical processes of the power system. Furthermore, this module uses graphic rendering technology to intuitively display various operating parameters of the marine methanol fuel power system (system parameters during operation, such as engine effective power, cylinder pressure, cylinder temperature, exhaust temperature, and exhaust back pressure) through real-time dynamic dashboards and trend charts. Users can clearly understand the performance of the power system under different navigation conditions through this visualized data, thus providing intuitive data for the optimized design of the power system.

[0034] Specifically, the parameters displayed in the front-end visualization module include power parameters, economic parameters, combustion process parameters, and emission and thermal management parameters. All parameters are dynamically updated based on real-time calculation results from the virtual twin. Among these, power parameters reflect the output capacity and motion state of the power system and are the most intuitive performance indicators in the digital twin testing platform, including engine speed, output torque, and effective power. Economic parameters measure fuel energy conversion efficiency and consumption levels, including methanol injection quantity, fuel consumption rate, and air-fuel ratio. Combustion process parameters reveal the thermodynamic characteristics of in-cylinder combustion and are the core analysis objects of the digital twin testing platform, including cylinder pressure, peak in-cylinder pressure, and in-cylinder temperature. Emission and thermal management parameters are used to evaluate the environmental friendliness and thermal stability of the power system, including exhaust temperature, exhaust back pressure, and coolant temperature. Furthermore, the marine methanol fuel power system digital twin testing platform of this embodiment can flexibly adjust the number and specific items of the final displayed parameters according to actual needs, supporting a custom parameter display panel to ensure that the parameter display of the digital twin testing platform conforms to the specific usage scenario.

[0035] The data management module is responsible for managing and scheduling multiple types of data, including a data storage unit, a data query and analysis unit, and a data security management unit. The data storage unit is used to construct a data storage system, which is divided into user operation data, parameter configuration data, simulation result data, etc., according to data type, to realize the classified storage of test data for the entire digital twin process; the data query and analysis unit provides multi-dimensional data query interfaces and in-depth analysis tools, enabling users to quickly query target data by time, parameter type, and other dimensions to realize the value mining of data; the data security management unit is used to construct a data security protection system, including functions such as data transmission encryption, storage encryption, access control, data backup and recovery, to prevent data leakage, tampering or unauthorized access, and to ensure the security of users' core data.

[0036] Preferably, it also includes a unified data interface for enabling efficient communication between modules in the digital twin test platform for marine methanol fuel power systems, ensuring the modularity and scalability of the platform, including input and output interfaces.

[0037] The input interface includes a user operation input interface and a parameter configuration interface; The user operation input interface is used to transmit user-inputted operation commands from the operation interaction module to the logic core module to drive the simulation calculation of the three-dimensional model of the virtual twin of the marine methanol fuel power system. These operation commands include start / stop commands, speed setting commands, component control commands, and emergency reset commands. Specifically, the start / stop command is used to start and stop the simulation of the power system virtual twin; the speed adjustment command is used to precisely adjust the simulation speed of the power system virtual twin to meet the speed simulation requirements under different operating conditions; the component control commands cover fuel injection control, intake valve control, and exhaust valve control, where fuel injection control supports fuel injection triggering operation, and intake and exhaust valve control can respectively regulate the on / off state of the corresponding valves; when the platform encounters an abnormal scenario, the emergency reset command can quickly restore the platform to its initial state, including stopping the power system virtual twin simulation, closing all valves, and resetting all operating parameters to zero, ensuring the safety and stability of the simulation process.

[0038] The parameter configuration interface is used to provide initial conditions and constraints for the mathematical model library and the virtual twin three-dimensional model library of the marine methanol fuel power system of the platform's logical core module through the operating condition control unit. The initial conditions and constraints include power system state parameters, ship navigation operating condition parameters, boundary conditions, and operating environment settings.

[0039] The output interface is used to output real-time simulation data. It drives the platform's front-end visualization module to render the 3D visualization effect and dynamically display parameters of the virtual twin 3D model of the marine methanol fuel power system. It also displays the operating process of the marine methanol fuel power system, its operating parameters, the ship's navigation parameters, real-time simulation data, multi-dimensional analysis results, and key performance indicators of the methanol fuel power system. The output simulation results include speed, cylinder pressure, temperature, fuel injection quantity, and emission parameters, and the output parameters can be adjusted according to the requirements of the external model interface.

[0040] The unified data interface mechanism in this embodiment meets the following design principles: (1) Standardization: Adopt a common data format to ensure the readability and compatibility of the interface and adapt to the efficient interaction of virtual data; (2) Low coupling: The modules of the platform communicate through interfaces, reducing direct dependencies between modules and facilitating maintenance and expansion; (3) Real-time performance: The interface communication between each module meets the high real-time performance requirements, ensuring the dynamic consistency of the virtual twin's operating state and guaranteeing the accuracy of simulation and monitoring; (4) Security: The interface has access control, data encryption and other functions to prevent data leakage, tampering or illegal access and protect the security of the platform's data.

[0041] The testing method of the digital twin test platform for marine methanol fuel power systems in this embodiment is as follows: Figure 3 As shown, it includes the following steps: S91, Platform Initialization Phase: Users set the initial operating parameters of the marine methanol fuel power system through the parameter configuration unit of the operation interaction module, including the number of engine cylinders, cylinder diameter, stroke, methanol injection quantity, etc.; and synchronize these parameters to the model building unit of the logic core module via a unified data interface, loading physical and logical relationship models such as the intake / exhaust system model and the turbocharging system model. Then, through the operating condition control unit of the operation interaction module, users set the ship's navigation operating condition parameters, including speed, wind speed and direction, wave height, etc.; and synchronize these parameters to the real-time calculation unit of the logic core module via a unified data interface. S92. Simulation Start-up and Operating Condition Simulation Phase: The user sends a start command through the operation interaction module. The real-time computing unit of the logic core module drives the virtual twin three-dimensional model of the marine methanol fuel power system to run based on the input parameters. The platform supports dynamic adjustment of operating conditions (such as adjusting wind speed and direction, wave height, etc.). The command is transmitted to the logic core module in real time to trigger multi-link data calculation. S93. Real-time monitoring and data acquisition stage: The front-end visualization module dynamically renders the virtual twin 3D model of the marine methanol fuel power system and displays real-time simulation data, including speed, cylinder pressure, and emission parameters, through the instrument panel and trend chart; the data management module synchronously stores the real-time simulation data to ensure traceability. S94. Result Analysis and Optimization Stage: The calculation result analysis unit of the logic core module performs multi-dimensional processing on the output data, i.e., real-time simulation data, to generate performance indicators (such as optimal air-fuel ratio and fuel consumption rate) and operating condition comparison reports; users can adjust parameters based on the analysis results and iteratively optimize the performance of the power system. S95, Test Termination and Data Export Phase: The user sends a stop command through the operation interaction module, and the digital twin test platform for marine methanol fuel power system safely shuts down the simulation process; the data management module provides a query interface to support users in exporting historical test data for third-party verification or in-depth analysis.

[0042] Specifically, digital twin technology, as a key technology bridging the physical and virtual worlds, enables real-time simulation, parameter monitoring, dynamic extrapolation, data analysis, and performance optimization of the power system's operating status by constructing a twin that maps the physical characteristics, operating mechanisms, and all elements of the ship's navigation conditions to the physical twin of the marine methanol fuel power system. This embodiment, based on digital twin technology, constructs a digital twin test platform that integrates the physical logic relationship model of the ship's navigation scenario and the power system. This platform can intuitively and completely display the entire operation process of the marine methanol fuel power system under different navigation conditions in a virtual environment, thereby creating a safe, reliable, efficient, convenient, and cost-effective experimental and testing platform. It consists of a front-end visualization module, an operation interaction module, a logic core module, and a data management module. The front-end visualization module is responsible for rendering the 3D model and displaying the user interface. It communicates with the back-end logic core module through a data interface, receiving the calculation results from the logic core module and displaying them visually. The operation interaction module collects user input commands and transmits them to the logic core module for analysis and calculation. The logic core module embeds a physical logic relationship model and a twin model, responsible for calculating and processing the power system's operating data. This module can receive operation input information and the system's real-time status, and can provide calculation results to other modules. The data management module is responsible for managing and scheduling operating data, providing data support to other modules. This digital twin test platform for marine methanol fuel power systems, through 3D visualization and real-time simulation technology, can fully present the working characteristics, operating rules, and adaptability performance of marine methanol power systems under different navigation conditions, providing an advanced digital test platform for the research and development of marine methanol power systems. The digital twin test platform for marine methanol fuel power systems in this embodiment can accurately simulate the working characteristics and operating rules of marine methanol fuel power systems under different navigation conditions, providing an important basis for the research and development of marine methanol fuel power systems.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A digital twin test platform for a marine methanol fuel power system, characterized in that, include: Operation interaction module, logic core module; The operation interaction module includes a parameter configuration unit, a working condition control unit, and an interaction feedback unit; The parameter configuration unit is used to set the initial operating parameters of the marine methanol fuel power system, including the number of engine cylinders, cylinder diameter, stroke, and methanol injection quantity, so as to realize the full-dimensional parameter configuration of the marine methanol fuel power system. The operating condition control unit is used to input user operation commands and set the ship's navigation operating condition parameters, including speed, wind speed and direction, and wave height, so as to achieve dynamic adjustment of the ship's navigation operating conditions. The interactive feedback unit is used to provide feedback on the real-time operating parameters of the marine methanol fuel power system, the ship's navigation condition parameters, and the real-time simulation data output through the logic core module. The core logic module includes a model building unit, a real-time computing unit, and a calculation result analysis unit; The model building unit is used to build a mathematical model library for marine methanol fuel power systems and a virtual twin three-dimensional model library for marine methanol fuel power systems. The real-time computing unit is used to perform real-time simulation calculations and obtain real-time simulation data based on the initial operating parameters of the methanol fuel power system, the ship's navigation condition parameters, the mathematical model library of the marine methanol fuel power system, and the virtual twin three-dimensional model library of the marine methanol fuel power system. The calculation result analysis unit is used to perform multi-dimensional analysis based on real-time simulation data, and obtain the results of the multi-dimensional analysis and the performance indicators of the methanol fuel power system.

2. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, The real-time simulation data includes dynamic parameters, economic parameters, combustion process parameters, and emission and thermal management parameters; The power parameters include engine speed, output torque, and effective power; the economic parameters include methanol injection quantity, fuel consumption rate, and air-fuel ratio; the combustion process parameters include cylinder pressure, peak cylinder pressure, and cylinder temperature; and the emission and thermal management parameters include exhaust temperature, exhaust back pressure, and coolant temperature.

3. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, The multi-dimensional analysis includes parameter trend analysis, operating condition comparison analysis, and performance optimization suggestion generation. The performance indicators include optimal air-fuel ratio, maximum effective power, minimum fuel consumption rate, emission compliance range, and optimal matching parameters corresponding to the ship's navigation conditions, including methanol injection pressure, methanol substitution rate, and compression ratio.

4. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, The mathematical models for marine methanol fuel power systems in the marine methanol fuel power system mathematical model library include: intake / exhaust system model, intercooler system model, turbocharger system model, and cylinder model; The intake / exhaust system model includes the continuity equation, energy conservation equation, and momentum conservation equation; the intercooler system model includes the calculation formulas for the working fluid temperature and pressure leaving the intercooler; the turbocharger system model includes the calculation formulas for the compressor parameters and turbine parameters; and the cylinder model includes the basic thermodynamic equations for the thermodynamic processes within the cylinder, the cylinder working volume calculation model, the heat transfer calculation model of the cylinder peripheral wall, and the combustion heat release rate calculation model.

5. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, The virtual twin 3D model library for marine methanol fuel power systems includes a cylinder 3D model, a piston 3D model, a combustion chamber 3D model, and an intake and exhaust valve 3D model. The three-dimensional model of the cylinder is used to restore the geometric dimensions of the real cylinder. It can obtain the average temperature of the peripheral wall based on the instantaneous temperature of the working fluid and the pressure of the working fluid, so as to dynamically display the heat distribution and stress changes of the cylinder wall under different working conditions. The piston 3D model is used to recreate the piston's top shape, skirt structure, and piston ring groove structure, and is matched with the cylinder 3D model to achieve reciprocating motion simulation. The three-dimensional model of the combustion chamber is used to recreate the actual shape and volume of the combustion chamber in order to simulate the combustion process; The 3D model of the intake and exhaust valve is used to recreate the valve head shape, valve stem length, and valve guide structure to simulate the changes in valve opening angle and lift.

6. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, It also includes a front-end visualization module; The front-end visualization module is used to render and display the virtual twin 3D model of the marine methanol fuel power system, and at the same time display the operation process of the marine methanol fuel power system, the operating parameters of the marine methanol fuel power system, the navigation condition parameters of the ship, real-time simulation data, the results of multi-dimensional analysis, and the key performance indicators of the methanol fuel power system.

7. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, It also includes a data management module; The data management module includes a data storage unit, a data query and analysis unit, and a data security management unit; The data storage unit is used to build a data storage system, including data classified by data type into operating condition setting data, parameter configuration data, and simulation result data, so as to realize the classified storage of digital twin full-process data; The data query and analysis unit provides multi-dimensional data query interfaces and in-depth analysis tools, enabling users to perform multi-dimensional target data queries by time and data type in order to realize the value of data. The data security management unit is used to build a data security protection system, including data transmission encryption, storage encryption, access control, data backup and recovery, to prevent data leakage, tampering or unauthorized access, and to ensure the security of users' core data.

8. The digital twin test platform for a marine methanol fuel power system according to claim 1, characterized in that, It also includes a unified data interface, comprising input and output interfaces: The input interface includes a user operation input interface and a parameter configuration interface; The user operation input interface is used to transmit the operation commands input by the user in the operation interaction module to the logic core module to drive the simulation calculation of the three-dimensional model of the virtual twin of the marine methanol fuel power system. The parameter configuration interface is used to provide initial conditions and constraints for the mathematical model library of marine methanol fuel power system and the three-dimensional model library of marine methanol fuel power system virtual twin through the operating condition control unit; The output interface is used to drive the front-end visualization module to render and display the virtual twin 3D model of the marine methanol fuel power system, as well as to display the operation process of the marine methanol fuel power system, the operating parameters of the marine methanol fuel power system, the navigation condition parameters of the ship, real-time simulation data, the results of multi-dimensional analysis, and the key performance indicators of the methanol fuel power system.

9. A digital twin test platform for a marine methanol fuel power system according to claim 8, characterized in that, The operation commands include start / stop commands, speed setting commands, component control commands, and emergency reset commands.

10. A test method for a digital twin test platform for a marine methanol fuel power system according to any one of claims 1-9, characterized in that, Includes the following steps: S91, Platform Initialization Phase: Users set the initial operating parameters of the marine methanol fuel power system through the parameter configuration unit of the operation interaction module, including the number of engine cylinders, cylinder diameter, stroke, and methanol injection quantity; and synchronize this to the model building unit of the logic core module; then, through the operating condition control unit of the operation interaction module, users set the ship's navigation operating condition parameters, including speed, wind speed and direction, and wave height. And synchronized to the real-time computing unit of the logic core module; S92. Simulation Start-up and Operating Condition Simulation Stage: The user sends a start command through the operation interaction module, and the real-time computing unit of the logic core module drives the virtual twin three-dimensional model of the marine methanol fuel power system to run based on the input parameters. S93. Real-time monitoring and acquisition stage: The front-end visualization module dynamically renders the three-dimensional model of the virtual twin of the marine methanol fuel power system and displays the real-time simulation data through the dashboard and trend chart. The data management module synchronously stores real-time simulation data; S94. Result Analysis and Optimization Stage: The calculation result analysis unit of the logic core module performs multi-dimensional processing on the real-time simulation data to generate performance indicators and operating condition comparison reports. S95. Test Termination and Data Export Phase: The user sends a stop command through the operation interaction module, and the digital twin test platform for the marine methanol fuel power system safely shuts down the simulation process, completing the test of the marine methanol fuel power system.

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