Ship energy efficiency simulation and design method and system

Abstract

The invention provides a ship energy efficiency simulation and design method and system, and the method comprises the steps: building a ship energy efficiency simulation model; building a ship energy consumption demand prediction model; simulating an energy consumption demand of a ship on a real route as a boundary parameter of the energy efficiency simulation model; carrying out analogue simulation on a plurality of designed target ship design schemes containing different energy efficiency technical equipment to obtain ship energy efficiency levels under different technical schemes; and comparing and analyzing, and dynamically displaying. In addition, the invention also provides a multi-objective optimization scheme, and the user can set the weight of the energy efficiency index and the economic index according to the own demand to generate an optimal design scheme.

Description

Technical Field

[0001] This invention relates to the field of ship design technology, and more specifically, to ship energy efficiency simulation and design methods and systems. Background Technology

[0002] The shipping industry has developed rapidly in recent years, but it also faces significant challenges in energy scarcity and greenhouse gas emission reduction. Experts in the shipbuilding field have proposed various methods for energy conservation and emission reduction. These include: reducing speed, optimizing routes, reducing bubble drag, analyzing the thermoeconomics of main engines, and adopting new energy sources such as LNG, methanol, and ammonia fuel. Currently, installing new energy efficiency technologies (EETs) (such as shaft generators, air lubrication systems (ALS), auxiliary engine exhaust gas boilers (AE EGB), OCCS systems, solar panels, and lithium batteries) has become a popular direction for energy conservation and emission reduction in ships in recent years.

[0003] However, existing optimization technologies for adding energy efficiency devices such as EETs to ships mainly focus on energy efficiency management during the navigation phase and the innovation of individual devices. The design phase lacks integration with sea state simulation and economic assessment, resulting in high costs and limited effectiveness of energy efficiency measures, making it difficult to achieve true energy conservation and emission reduction goals. Furthermore, there is a lack of comprehensive consideration of the effectiveness and economics of energy efficiency optimization methods from a ship design perspective. The effectiveness of EETs is affected by differences in ship type, route, and sea conditions. Therefore, it is necessary to analyze the effects of energy efficiency optimization methods or technologies on ship energy efficiency during real-world route operations through simulation. Summary of the Invention

[0004] In view of the lack of a comprehensive approach to energy efficiency optimization methods from a ship design perspective, as described above, this application provides a ship energy efficiency simulation and design method and system.

[0005] To achieve the above and other related objectives, the present invention provides a method for ship energy efficiency simulation and design, comprising:

[0006] Constructing a ship energy efficiency simulation model: Based on the system composition of the target ship and the energy input and output relationships between equipment, the ship energy efficiency simulation model is constructed.

[0007] Establish a ship energy consumption demand prediction model: The ship energy consumption demand prediction model is established based on the navigation condition data, sea state environment data, and energy consumption data of ships of the same type as the target ship on the target route.

[0008] Predicting the energy consumption of the target vessel: Input the navigation operating data and sea state environmental data of the target vessel on a given route into the vessel energy consumption demand prediction model, and the vessel energy consumption demand prediction model outputs the energy consumption demand prediction result of the target vessel.

[0009] Generate a design scheme for the target vessel: Design a design scheme for the target vessel that incorporates different energy efficiency technologies and equipment;

[0010] Energy efficiency simulation analysis is performed: the predicted energy consumption demand of the target ship is used as the boundary parameters of the ship energy efficiency simulation model; the design scheme of the target ship is input into the ship energy efficiency simulation model; the ship energy efficiency simulation model is run; the ship energy efficiency level under the design scheme of the target ship is obtained and a comparative analysis is performed.

[0011] Optionally, before constructing the ship energy efficiency simulation model, the method further includes constructing a ship equipment model library, which includes energy efficiency technology equipment; and selecting models from the ship equipment model library to establish the ship energy efficiency simulation model.

[0012] Optionally, the equipment model library also includes main units, boilers, propellers, and generator sets.

[0013] Optionally, it also includes: conducting an economic evaluation of the design scheme of the target vessel.

[0014] Optionally, the economic assessment includes calculating the unit energy efficiency savings cost of the energy efficiency improvement of the energy efficiency technology equipment, and calculating the investment cost payback period for different energy efficiency technology equipment and their different parameter configurations.

[0015] Optionally, the navigation data includes: port distance, heading, speed, sailing time, draft, maneuvering time, and berthing time;

[0016] The marine environmental data includes: wind speed, wind direction, wave height, wave direction, wave period, seawater temperature, and sunlight.

[0017] Optionally, the design scheme of the target vessel includes: a design scheme with different energy efficiency technology equipment, a design scheme with different combinations of energy efficiency technology equipment, a design scheme with different configuration parameters of the energy efficiency technology equipment, and a design scheme with different arrangement of the energy efficiency technology equipment.

[0018] Optionally, it also includes dynamically displaying the energy efficiency level of the target ship design scheme.

[0019] On the other hand, this embodiment provides a ship energy efficiency simulation and design system, characterized in that it includes:

[0020] The simulation modeling module is used to build ship energy efficiency simulation models;

[0021] The energy demand prediction module is used to calculate the energy demand of the target ship, which includes propulsion power demand and electrical load demand.

[0022] The user interaction module is used to design ship design schemes that incorporate different energy efficiency technologies and equipment.

[0023] The energy efficiency analysis module is used to input the user-designed ship design scheme, which includes different energy efficiency technology equipment, into the ship energy efficiency simulation model, and compare the output simulation results.

[0024] The economic evaluation module is used to calculate the unit energy efficiency savings and investment payback period of the ship design scheme;

[0025] The optimization decision module is used to generate the optimal energy efficiency technology equipment design scheme based on user needs.

[0026] Optionally, the user interaction module includes:

[0027] Input parameter module: includes marine meteorological data input module, navigation condition data input module, energy efficiency technology equipment selection input module, and energy efficiency technology equipment parameter configuration input module;

[0028] Energy efficiency dynamic display module: used to display the target ship's navigation route, speed, fuel consumption, and CO2 emissions;

[0029] Output module: Output information includes ship energy efficiency simulation results and economic evaluation results under different energy efficiency technology and equipment design schemes.

[0030] As described above, the ship energy efficiency simulation and design method and system provided by the present invention have at least the following beneficial technical effects:

[0031] During the ship design phase, energy efficiency performance under real sea conditions is simulated, and combined with economic analysis, appropriate energy efficiency parameters (EETs) and parameter configurations are selected to optimize the ship system design. Visualized simulation results and multi-objective optimization schemes are provided. Users can set the weights of energy efficiency and economic indicators according to their needs, comprehensively considering factors such as installation costs, operating costs, maintenance costs, and carbon taxes, to select a more cost-effective design scheme, thereby reducing investment costs. Furthermore, the dynamic energy efficiency display module, through an intuitive visual interface, displays key information such as the target ship's route, longitude, latitude, speed, and fuel consumption in real time, providing a basis for decision-making. It can also reduce fuel consumption through design, significantly reducing greenhouse gas emissions. This plays a positive role in addressing global climate change and protecting the environment. Attached Figure Description

[0032] Figure 1 The flowchart shown is a process for the ship energy efficiency simulation and design method provided in Example 1.

[0033] Figure 2 The image shown is a schematic diagram of the ship energy flow simulation model provided in Example 1.

[0034] Figure 3 The diagram shown is a schematic of the input parameter module of the ship energy efficiency simulation and design system provided in Example 2.

[0035] Figure 4 The diagram shown is a schematic of the energy efficiency dynamic display module of the ship energy efficiency simulation and design system provided in Embodiment 2.

[0036] Figure 5 The diagram shown is a schematic of the output module of the ship energy efficiency simulation and design system provided in Example 2. Detailed Implementation

[0037] The following specific examples illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention.

[0038] It should be noted that the illustrations provided in this embodiment are only schematic representations of the basic concept of the present invention. Although the illustrations only show components related to the present invention and are not drawn according to the actual number, shape and size of the components, the shape, quantity, positional relationship and proportion of each component can be arbitrarily changed under the premise of realizing the technical solution of this invention, and the layout of the components may also be more complex.

[0039] Example 1

[0040] This embodiment provides a method for ship energy efficiency simulation and design, such as Figure 1 The diagram shows a flowchart of the ship energy efficiency simulation and design method provided in this embodiment; it includes the following steps:

[0041] S1: Constructing a ship energy efficiency simulation model: Based on the system composition of the target ship and the energy input and output relationship between the equipment, construct the ship energy efficiency simulation model;

[0042] S2: Build a ship energy consumption demand prediction model: Build the ship energy consumption demand prediction model based on the navigation condition data, sea state environment data, and ship energy consumption data of ships of the same type as the target ship on the target route.

[0043] S3: Predict the energy consumption of the target vessel: Input the navigation condition data and sea environment data of the target vessel on a given route into the vessel energy consumption demand prediction model, and the vessel energy consumption demand prediction model outputs the energy consumption demand prediction result of the target vessel.

[0044] S4: Generate the design scheme of the target ship: Design the target ship design scheme that includes different energy efficiency technology equipment;

[0045] S5: Perform energy efficiency simulation analysis: Use the predicted energy consumption demand of the target ship as the boundary parameters of the ship energy efficiency simulation model; input the design scheme of the target ship into the ship energy efficiency simulation model; run the ship energy efficiency simulation model; obtain the ship energy efficiency level of the target ship design scheme and compare it with the boundary parameters.

[0046] Specifically, S1: Constructing a ship energy efficiency simulation model: Based on the system composition of the target ship and the energy input and output relationship between the equipment, the ship energy efficiency simulation model is constructed.

[0047] S11: Building the device model library:

[0048] Specifically, the equipment model library includes new energy efficiency technologies (EETs). Generally, the equipment models also include key marine equipment such as main engines, boilers, propellers, and generator sets. Detailed mathematical models need to be established for each type of equipment to simulate its performance and energy consumption under different operating conditions. Typically, the equipment model library is built using simulation software such as Matlab / Simulink or Dymola, based on the physical characteristics of the marine electromechanical equipment (such as main engine power-speed curves, propeller thrust coefficients, generator set efficiency tables, etc.) and mathematical mechanisms (such as energy conservation equations and fluid dynamics equations). Notably, the equipment models in the library are not fixed; users can add necessary equipment as needed to ensure that the equipment models can adapt to the requirements of different ships and different scenarios.

[0049] Optionally, if the device model is an existing model, there is no need to rebuild the model based on the device; these models can be directly added to the device model library. In particular, it is necessary to ensure the compatibility of the model with the current simulation system and perform necessary verification and calibration.

[0050] Specifically, this embodiment uses EETs as an example to analyze the energy efficiency level of ships equipped with EETs during actual route operation through simulation. Specifically, the EET model includes air lubrication systems (ALS), shaft-driven generators, carbon capture and storage systems (OCCS), solar energy devices, etc., and each device model includes its design parameters (such as power, efficiency, and installation location) and dynamic response characteristics (such as energy efficiency fluctuations under load changes). In particular, this invention does not limit the specific EET device, but only uses EETs to illustrate the method principle of this invention, and is not intended to limit the invention.

[0051] S12: Constructing a ship energy flow simulation model:

[0052] Specifically, based on the target ship's composition and energy input-output relationships, equipment models are retrieved from a ship equipment model library to construct a ship energy flow simulation model. This simulation model can simulate the energy flow state of the target ship under different navigation conditions on the target route, specifically including energy generation, transmission, conversion, and consumption. Furthermore, various parameters are set for the equipment models in the ship energy flow simulation model, including simulated data such as equipment power and rotational speed, to simulate the actual situation of the target ship on the target route, thereby selecting suitable equipment and parameters for actual production.

[0053] Specifically, the target vessels include newly built ships as well as those already in operation that have undergone modifications (including the addition or improvement of energy efficiency technologies and equipment).

[0054] Generally, ship energy flow simulation models include ship electrical energy flow simulation models and ship mechanical energy flow simulation models. Specifically, the ship electrical energy flow simulation model simulates the energy flow of the ship's electrical system, including the dynamic characteristics of the entire process of power generation, distribution, and consumption; the ship mechanical energy flow simulation model simulates the energy transfer and conversion of the ship's mechanical system, including the dynamic performance of components such as the main engine, drive shaft, and propeller. Ship energy flow simulation models are typically constructed using tools such as the Simscape Electrical module in Matlab / Simulink or the Power System Library / Volume Dynamics module in Dymola.

[0055] like Figure 2The diagram shown is a schematic of the ship energy flow simulation model provided in this embodiment. This embodiment uses a ship mechanical energy flow simulation model as an example. The ship energy flow simulation model includes: engines (cylinders) for generating energy; transmitting energy to the shafting system, turbine system, compressor system, cooler system, and exhaust system. Furthermore, the ship energy flow simulation model provided in this embodiment also includes a fuel control system, a PID controller, and an alarm system (AIarm). This ship energy flow simulation model can simulate energy transfer and changes under different operating conditions, including the dynamic performance of components such as the main engine, drive shaft, and propeller, as well as safety protection modules integrated into a single simulation model.

[0056] Furthermore, the simulation model includes setting corresponding parameters, input / output ports, and state variables for each device model. Specifically, it also includes variable interfaces, such as host power output and propulsion system power requirements. Optionally, after completing the simulation modeling, the accuracy of the model is verified by comparing simulation results with experimental data or known data. This includes verifying the host model based on bench test reports and verifying the resistance model by combining daily report data. The simulation model is then optimized through parameter correction to improve overall simulation accuracy.

[0057] S13: Establishing a ship energy efficiency index system:

[0058] Specifically, the ship energy efficiency simulation model provided in this embodiment also includes a ship energy efficiency index system. Specifically, the ship energy efficiency index system is used to calculate fuel consumption, CO2 emissions, Energy Efficiency Design Index (EEDI), Energy Efficiency Operation Index (EEOI), and Ship Operation Carbon Intensity Index (CII), etc. Specifically, fuel consumption is calculated based on simulation results to determine hourly fuel consumption (tons / hour) and converted to annual total consumption; CO2 emissions are calculated based on the carbon content coefficient of fuel type (e.g., heavy oil, LNG) (e.g., 3.1 tons CO2 / ton of fuel); the Energy Efficiency Design Index (EEDI) is calculated using the formula: EEDI = (CO2 emissions) / (freight volume × speed); the Ship Operation Carbon Intensity Index (CII) is graded based on the ratio of annual CO2 emissions to transport workload (e.g., tons-nautical miles). This is not limited to the calculation formulas proposed in this application, but is merely used to illustrate the method principle of the present invention and is not intended to limit the invention.

[0059] S14: Constructing an economic evaluation model for EETs:

[0060] Specifically, the ship energy efficiency simulation model provided in this embodiment also includes an economic evaluation model. Specifically, the economic evaluation model is used to calculate installation costs, operating costs, investment payback period, and carbon tax exemption benefits. Specifically, the installation costs are calculated, including EETs equipment procurement costs and installation engineering costs (e.g., the OCCS system requires cargo hold volume, which is converted into cost losses); operating costs are calculated, including energy savings benefits (e.g., reduced fuel costs) and maintenance costs (e.g., the cost of periodic replacement of ALS air compressors); the investment payback period (in years) is calculated using the formula: Investment Payback Period (in years) = Total Installation Cost / Annual Net Benefit (Fuel Savings Benefit - Maintenance Cost); carbon tax exemption benefits are calculated based on the regional carbon tax policy, determining the tax exemption corresponding to the emission reduction.

[0061] Specifically, after establishing the simulation model, it is necessary to validate the model. Specifically, the matching degree of the speed-power curve is verified by using actual ship data (such as the actual ship's AIS log); and the fuel consumption rate is calibrated by recording fuel data (error <3%).

[0062] S2: Build a ship energy consumption demand prediction model: Build the ship energy consumption demand prediction model based on the navigation conditions data, sea conditions data, and energy consumption data of ships of the same type as the target ship on the target route.

[0063] S21: Establish a dataset, which includes navigation condition data and sea environment data of vessels of the same type as the target vessel sailing on the target route, as well as energy consumption data of the vessels of the same type as the target vessel.

[0064] Specifically, this target route is the actual route the target vessel will travel. Specifically, the navigation data includes: port distance, heading, speed, sailing time, draft, maneuvering time, and berthing time. Specifically, the sea environment data includes: wind speed, wind direction, wave height, wave direction, wave period, sea temperature, and sunlight along the target route. Generally, this data can be obtained through historical records, experimental tests, or public databases. Training the model with real data can greatly improve the model's reliability.

[0065] Specifically, the target vessel is a vessel of the same type as existing vessels already in operation.

[0066] Optionally, the dataset also includes parameter settings for ship equipment, including engine, compressor, shafting system, turbine system, cooling system, and exhaust system.

[0067] S22: Build the ship energy consumption demand prediction model based on the dataset.

[0068] Generally, machine learning algorithms and neural networks are used to build ship energy demand prediction models. Commonly used algorithms include backpropagation (BP) neural networks, support vector machines, and random forests. The appropriate algorithm is selected based on the characteristics of the data and the complexity of the model.

[0069] Optionally, before building the ship energy demand prediction model, the acquired data may be preprocessed. This includes steps such as data cleaning (removing outliers and duplicates), data denoising, and data normalization.

[0070] The model is then trained using the preprocessed data, and its prediction accuracy is improved by continuously adjusting the model's parameters and structure. Cross-validation and other methods can be used to evaluate the model's performance during training.

[0071] S3: Predict the energy consumption of the target vessel: Input the navigation operating data and sea environment data of the target vessel on the target route into the vessel energy consumption demand prediction model, and the vessel energy consumption demand prediction model outputs the energy consumption demand prediction result of the target vessel.

[0072] In this step, to predict the energy consumption of the target vessel, we need to input the target vessel's navigation operating condition data and sea state environmental data along the target route into the established vessel energy demand prediction model. This model can output the predicted energy demand of the target vessel based on the input data. It is worth noting that this prediction process does not restrict whether the target vessel includes Energy Efficiency Technologies (EETs); that is, the target vessel can be without EETs or include any type of EET, and there are no requirements regarding the specific parameters of the EETs. As long as we can find vessel data of the same type as the target vessel in our dataset, we can use this model to predict energy demand. The predicted energy demand (including at least propulsion power demand and electrical load demand) serves as an important boundary parameter, used as input for subsequent simulation analysis of vessel energy efficiency levels under different EET design schemes, thereby helping to optimize vessel design and improve energy efficiency.

[0073] Specifically, the input parameters include the target vessel's navigation operating parameters (such as port distance, heading, speed, sailing time, draft, maneuvering time, and berthing time) and the target route's sea state environmental parameters (such as wind speed, wind direction, wave height, wave direction, wave period, sea temperature, and sunlight). These are input into the vessel's energy demand prediction model. The model outputs the predicted energy demand of the target vessel under the target route. This result reflects the vessel's energy consumption under different operating conditions and sea states, providing fundamental data for subsequent energy efficiency simulation analysis.

[0074] S4: Generate the design scheme of the target ship: Design the target ship design scheme that includes different energy efficiency technology equipment.

[0075] Generally, different EETs design schemes are designed based on actual needs and design objectives. These schemes may include design schemes that incorporate different equipment types, design schemes that change the configuration parameters of the equipment, and design schemes that change the arrangement of the equipment. Any other minor changes are considered as a new design scheme.

[0076] Specifically, the design schemes include different types of equipment, including consideration of introducing energy-efficient equipment for different types of ships, such as shaft generators, air lubrication systems (ALS), AE EGB, carbon capture and storage systems (OCCS), solar panels, and lithium batteries, each with its own unique energy efficiency improvement mechanism.

[0077] Specifically, design schemes that modify the configuration parameters of equipment can optimize its energy efficiency by adjusting the specific configuration parameters of selected equipment. For example, for carbon capture and storage systems, parameters such as carbon capture capacity, CO2 storage chamber volume, CO2 storage chamber loading limit, CO2 purity, and CO2 storage state density can be adjusted; for lithium batteries, battery capacity and charge / discharge rate can be adjusted.

[0078] Specifically, design schemes that modify equipment layout should focus on the specific arrangement and installation methods of the equipment on the ship, as different layouts may affect the operating efficiency and energy performance of the equipment. For example, the layout of solar energy devices should take into account the ship's navigation route and the intensity of solar radiation to ensure maximum solar radiation reception.

[0079] S5: Perform energy efficiency simulation analysis: Use the predicted energy consumption demand of the target ship as the boundary parameters of the ship energy efficiency simulation model; input the design scheme of the target ship into the ship energy efficiency simulation model; run the ship energy efficiency simulation model; obtain the ship energy efficiency level of the target ship design scheme and perform comparative analysis.

[0080] Specifically, different design schemes are input into the ship energy efficiency simulation model. The model will simulate the energy flow and consumption of the ship under different design schemes, and intuitively display the ship's energy efficiency level and its changing trends under different design schemes through charts, animations, and other forms. Optionally, the ship's energy efficiency level under different EETs design schemes can be output separately for dynamic display; alternatively, all ship energy efficiency levels under different EETs design schemes can be aggregated for display to facilitate comparison.

[0081] Specifically, after the predicted energy consumption requirements (propulsion power requirements and power load requirements) are input into the ship energy efficiency simulation model as boundary parameters, the ship energy efficiency levels under different EETs design schemes are obtained through operation, and a comparative analysis is carried out. Then, the economic evaluation of different EETs design schemes is carried out.

[0082] Optionally, there are many ways of economic evaluation. Specifically, the economic evaluation includes calculating the cost savings per unit energy efficiency improved by EETs and outputting the payback period of the investment cost under different EETs devices and their different parameter configurations. Specifically, the cost savings per unit energy efficiency improved by EETs includes fuel cost savings evaluation and carbon tax savings evaluation: by comparing the fuel consumption and CO2 emissions before and after installing EETs, the fuel cost saved due to energy efficiency improvement and the carbon tax cost reduced due to the reduction of CO2 emissions are calculated.

[0083] Optionally, in addition to economic evaluation, environmental benefits (carbon credits), life cycle cost analysis (LCCA), etc. can also be calculated for evaluation.

[0084] In addition, users can also focus on energy efficiency indicators or economic indicators according to their own needs, set weights, and the weight settings can be adjusted according to the actual needs and preferences of users, so as to select a suitable design scheme. Specifically, if users are more concerned about the energy utilization efficiency of the ship during operation and reducing the environmental burden, they can adopt energy-efficient energy efficiency technology equipment (EETs), such as advanced shaft generators, air lubrication systems or hybrid power systems; if users attach more importance to the economic benefits of investment and cost recovery, they tend to choose a design scheme that focuses on economy.

[0085] The ship energy efficiency simulation and design method provided by the present invention can design multiple combined schemes containing different EETs. Through simulation analysis and economic evaluation, it provides multiple choices for decision-makers. The choice is flexible, allowing users to formulate a ship energy efficiency design scheme that meets both environmental protection requirements and economic feasibility according to their specific operation requirements and goals.

[0086] Embodiment 2

[0087] This embodiment provides a ship energy efficiency simulation and design system, including: a simulation modeling module for constructing a ship energy efficiency simulation model; an energy demand prediction module for calculating the energy demand of a target ship, including propulsion power demand and electrical load demand; a user interaction module for designing ship design schemes containing different EETs; an energy efficiency analysis module for inputting the user-designed ship design schemes containing different EETs into the ship energy efficiency simulation model and comparing the output simulation results; an economic evaluation module for calculating the unit energy efficiency savings cost and investment payback period of the ship design scheme; and an optimization decision module for generating the optimal EETs design scheme according to user needs.

[0088] Optionally, the simulation modeling module can call existing equipment models for simulation modeling, or it can recreate models of individual equipment through the simulation modeling module. For example, it can develop mathematical models of integrated main units, propellers, generator sets, and EETs (such as ALS, OCCS, and shaft-driven generators) based on tools such as Matlab / Simulink or Dymola.

[0089] Optionally, the energy demand forecasting module includes a data collection module and a data cleaning module. The data collection module can dynamically acquire sea state data of the shipping route in real time to update the forecast results.

[0090] Specifically, the user interaction module includes: an input parameter module, such as... Figure 3 The diagram shown illustrates the input parameter module of the ship energy efficiency simulation and design system provided in this embodiment. Figure 3 As can be seen, the parameters output by the input reference module include the marine meteorological data input module, the navigation condition data input module, the EETs equipment selection input module, and the EETs equipment parameter configuration input module. Specifically, the marine meteorological data input module can input data including seawater temperature, waves, wave direction angle, wave period, wind speed, wind direction angle, and illumination conditions; the navigation condition data module can input data including route, port distance, draft, sailing speed, heading, sailing time, maneuvering time, berthing time, etc. The EETs equipment selection input module can select equipment including shaft-driven generators, air lubrication systems (ALS), AE EGB, OCCS systems, solar energy devices, lithium batteries, etc. In this embodiment, the EETs equipment parameter configuration input module takes the OCCS system as an example. Adjustable parameters include: carbon capture capacity, CO2 storage tank volume, CO2 storage tank loading limit, captured CO2 purity, CO2 storage state density, etc. Specifically, the settings of the input parameter module are not unique and can be modified according to actual needs. Optionally, data input supports manual input or automatic import of meteorological data.

[0091] Specifically, such as Figure 4The diagram shown is a schematic of the energy efficiency dynamic display module of the ship energy efficiency simulation and design system provided in this embodiment; by Figure 4 As can be seen, the dynamic energy efficiency display module can display the target vessel's navigation route, as well as the following information at a specific address along the route: longitude, latitude, speed, heading angle, fuel consumption, CO2 emissions, EEOI value, CII value, and sea state (wind speed, wind direction angle, wave height, wave direction angle, etc.). It can also display the energy efficiency and economic indicators (bar charts, radar charts) for different EETs schemes.

[0092] Optionally, the energy efficiency dynamic display module can display a 3D ship model, which can display the navigation route, speed, and fuel consumption heat map in real time.

[0093] Specifically, such as Figure 5 The diagram shown is a schematic of the output module of the ship energy efficiency simulation and design system provided in this embodiment; by Figure 5 The output module shows that it provides simulation results of ship energy efficiency under different EETs design schemes, as well as economic evaluation results. Specifically, the economic evaluation for different EETs design schemes can comprehensively consider installation costs, operating costs, maintenance costs, and carbon tax (cost savings per unit of energy efficiency), and also calculate the payback period for EETs investment costs.

[0094] Optionally, the output module can set the weights of energy efficiency and economic indicators to obtain the optimal ship energy efficiency design scheme. Optionally, the output module can generate PDF / Excel reports according to customer needs, including simulation results, economic assessment, and comparison of optimization schemes.

[0095] The energy efficiency analysis module is used to output the energy efficiency levels under different EETs design schemes and compare simulation results. Specifically, it includes automatically mapping the user-designed EETs scheme to the simulation model, inputting the predicted energy consumption demand (including at least propulsion power and electrical load) as boundary conditions into the energy efficiency simulation model, calculating indicators such as fuel consumption, CO2 emissions, EEDI, EEOI, and CII, generating energy efficiency comparison reports (such as "before and after installing EETs, scheme A reduces emissions by 15%, scheme B reduces emissions by 22%), evaluating the impact of key parameters (wave height, speed) on energy efficiency, and outputting weighted analysis.

[0096] The economic assessment module is used to calculate the unit energy efficiency savings and investment payback period of the ship design scheme; specifically, it includes: installation costs, EETs equipment procurement costs, installation engineering costs; operating costs, etc.

[0097] The optimization decision module is used to generate the optimal EETs design scheme based on user needs; optionally, it can automatically recommend the optimal scheme based on user preferences (such as "prioritizing low cost" or "zero emissions").

[0098] In summary, the ship energy efficiency simulation and design system provided in this embodiment covers the entire process from data acquisition, simulation modeling, energy efficiency analysis to economic evaluation and optimization decision-making. At the initial stage of ship design, parameters are flexibly adjusted through simulation, and visualized simulation results and multi-objective optimization schemes are provided to build green and low-carbon ships, achieving energy conservation and emission reduction, and meeting market demands.

[0099] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. A method for simulating and designing ship energy efficiency, characterized in that, include: Constructing a ship energy efficiency simulation model: Based on the system composition of the target ship and the energy input and output relationships between equipment, the ship energy efficiency simulation model is constructed. Establish a ship energy consumption demand prediction model: The ship energy consumption demand prediction model is established based on the navigation condition data, sea state environment data, and energy consumption data of ships of the same type as the target ship on the target route. Predicting the energy consumption of the target vessel: Inputting the navigation operating data and sea state environmental data of the target vessel on the target route into the vessel energy consumption demand prediction model, and the vessel energy consumption demand prediction model outputs the energy consumption demand prediction result of the target vessel; Generate a design scheme for the target vessel: Design a design scheme for the target vessel that incorporates different energy efficiency technologies and equipment; Energy efficiency simulation analysis is performed: the predicted energy consumption demand of the target ship is used as the boundary parameters of the ship energy efficiency simulation model; the design scheme of the target ship is input into the ship energy efficiency simulation model; the ship energy efficiency simulation model is run; the ship energy efficiency level under the design scheme of the target ship is obtained and a comparative analysis is performed.

2. The ship energy efficiency simulation and design method according to claim 1, characterized in that, Before constructing the ship energy efficiency simulation model, the process also includes constructing a ship equipment model library, which includes energy efficiency technology equipment; models are selected from the ship equipment model library to establish the ship energy efficiency simulation model.

3. The ship energy efficiency simulation and design method according to claim 2, characterized in that, The equipment model library also includes mainframes, boilers, propellers, and generator sets.

4. The ship energy efficiency simulation and design method according to claim 1, characterized in that, Also includes: An economic evaluation was conducted on the design scheme of the target vessel.

5. The ship energy efficiency simulation and design method according to claim 4, characterized in that, The economic assessment includes calculating the unit energy efficiency savings cost of the energy efficiency improvement equipment, and calculating the investment cost payback period for different energy efficiency technologies and equipment and their different parameter configurations.

6. The ship energy efficiency simulation and design method according to claim 1, characterized in that, The navigation data includes: port distance, heading, speed, sailing time, draft, maneuvering time, and berthing time. The marine environmental data includes: wind speed, wind direction, wave height, wave direction, wave period, seawater temperature, and sunlight.

7. The ship energy efficiency simulation and design method according to claim 1, characterized in that, The design schemes for the target vessel include: a design scheme that includes different energy efficiency technology devices, a design scheme that includes different combinations of energy efficiency technology devices, a design scheme that changes the configuration parameters of the energy efficiency technology devices, and a design scheme that changes the arrangement of the energy efficiency technology devices.

8. The ship energy efficiency simulation and design method according to claim 1, characterized in that, It also includes dynamically displaying the energy efficiency level of the target ship design scheme.

9. A ship energy efficiency simulation and design system, characterized in that, include: The simulation modeling module is used to build ship energy efficiency simulation models; The energy demand prediction module is used to calculate the energy demand of the target ship, which includes propulsion power demand and electrical load demand. The user interaction module is used to design ship design schemes that incorporate different energy efficiency technologies and equipment. The energy efficiency analysis module is used to input the user-designed ship design scheme, which includes different energy efficiency technology equipment, into the ship energy efficiency simulation model, and compare the output simulation results. The economic evaluation module is used to calculate the unit energy efficiency savings and investment payback period of the ship design scheme; The optimization decision module is used to generate the optimal energy efficiency technology equipment design scheme based on user needs.

10. The ship energy efficiency simulation and design system according to claim 9, characterized in that, The user interaction module includes: Input parameter module: includes marine meteorological data input module, navigation condition data input module, energy efficiency technology equipment selection input module, and energy efficiency technology equipment parameter configuration input module; Energy efficiency dynamic display module: used to display the target ship's navigation route, speed, fuel consumption, and CO2 emissions; Output module: Output information includes ship energy efficiency simulation results and economic evaluation results under different energy efficiency technology and equipment design schemes.

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