Electric propulsion ship with double engines and double propellers

Abstract

The invention belongs to the technical field of electric propulsion ships, and provides a double-engine double-propeller electric propulsion ship which comprises two asynchronous generator sets serving as auxiliary energy of main power of the ship; the two sets of lithium battery packs are used as propulsion batteries of the ship; the two propulsion motors are connected with the lithium battery pack and used for driving double propellers of the ship; the two steering oar devices are connected with the propulsion motor and used for providing power for the ship; the centralized variable-frequency electric control equipment is used for grid connection of electric power of the asynchronous generator set and the lithium battery pack, driving a propulsion motor and providing a daily power supply; the solar charging device provides auxiliary charging for the lithium battery pack, and the utilization rate of renewable energy sources is increased; by integrating the solar charging device and the intelligent energy management system, the ship can utilize renewable energy sources such as solar energy more effectively, dependence on fossil fuel is reduced, the overall energy utilization efficiency is improved, and the greenhouse gas emission of the ship is reduced by reducing use of the fossil fuel.

Description

Technical Field

[0001] The invention belongs to the technical field of electric propulsion ships, and in particular to an electric propulsion ship with two engines and two propellers. Background Art

[0002] With the intensification of the global energy crisis and the improvement of environmental protection awareness, traditional ship propulsion systems powered by diesel engines are facing problems such as low energy efficiency and serious environmental pollution. Especially in the shipping industry, improving energy efficiency and reducing greenhouse gas emissions have become technical issues that urgently need to be solved in the industry.

[0003] Although existing electric propulsion ships have achieved electrification of the power system to a certain extent, they still rely on traditional diesel generators, which limits the diversity and cleanliness of energy utilization. Traditional diesel generators as the main power of ships have gradually failed to meet the environmental protection and energy efficiency needs of modern ships; in addition, these systems usually lack effective energy management strategies and cannot make full use of renewable energy sources, such as solar energy, to further reduce the impact on the environment.

[0004] To this end, those skilled in the art have proposed a twin-engine, twin-propeller electric propulsion ship to solve the problems raised by the background technology. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a dual-engine dual-propeller electric propulsion ship to solve the problem that the conventional diesel generator set as the main power of the ship in the prior art has gradually failed to meet the environmental protection and energy efficiency requirements of modern ships. In addition, these systems usually lack effective energy management strategies and cannot make full use of renewable energy, such as solar energy, to further reduce the impact on the environment.

[0006] A twin-engine twin-propeller electric propulsion ship, comprising:

[0007] Two asynchronous generator sets as auxiliary energy sources for the ship's main power;

[0008] Two sets of lithium battery packs, used as propulsion batteries for the vessel;

[0009] Two propulsion motors, connected to a lithium battery pack, are used to drive the vessel’s twin propellers;

[0010] Two rudder propellers connected to the propulsion motor to provide power for the ship;

[0011] Centralized variable frequency electric control equipment, used to connect the power of asynchronous generator sets and lithium battery packs to the grid, drive propulsion motors, and provide daily power;

[0012] The solar charging device provides auxiliary charging for the lithium battery pack and increases the utilization rate of renewable energy.

[0013] Preferably, the solar charging device comprises:

[0014] Solar panels, installed on the decks and sides of superstructures of ships;

[0015] Inverters, which convert the direct current generated by solar panels into alternating current;

[0016] Intelligent energy management system for real-time monitoring of solar panel output, battery status and vessel energy consumption, and adjusting solar panel output and battery charging strategy based on forecast and real-time data.

[0017] Preferably, the area of ​​the solar panel is calculated according to the following formula: Where: A is the required solar panel area, P is the expected solar power generation, t is the sunshine time, η is the conversion efficiency of the solar panel, and I is the average sunshine intensity.

[0018] Preferably, the intelligent energy management system includes:

[0019] a set of sensors to monitor the solar panels’ output, the battery’s state of charge and the vessel’s energy consumption;

[0020] a central processing unit to process sensor data;

[0021] A user interface that displays real-time data and system status.

[0022] Preferably, the intelligent energy management system further comprises a weather prediction algorithm for predicting the intensity and duration of sunshine.

[0023] Preferably, the intelligent energy management system also includes automatic control logic for adjusting the output of the solar panels and the charging strategy of the batteries based on the predicted and real-time data.

[0024] Preferably, the centralized variable frequency electric control equipment includes:

[0025] Two redundant daily power outputs provide high-quality daily AC power for the ship's daily loads.

[0026] Preferably, a charging controller is further included for optimizing the charging process of the battery, and the charging controller includes:

[0027] An input terminal connected to the output terminal of the inverter;

[0028] An output terminal connected to a battery;

[0029] A control unit that regulates the charging current and voltage of the battery.

[0030] Preferably, it also includes an energy storage unit for storing excess electrical energy generated by the solar panels.

[0031] Preferably, the ship is an electric propulsion ship with two engines and two propellers, and the propulsion motor and the rudder propeller device are installed in the rudder propeller compartment at the rear.

[0032] Compared with the prior art, the present invention has the following beneficial effects:

[0033] 1. By integrating a solar charging device and an intelligent energy management system, the present invention enables ships to more effectively utilize renewable energy such as solar energy and reduce dependence on fossil fuels, thereby improving overall energy utilization efficiency. By reducing the use of fossil fuels, the greenhouse gas emissions of ships can be reduced, and the impact on the environment is also reduced accordingly; the integration of solar charging devices and intelligent energy management systems effectively solves the problems of low energy efficiency and environmental pollution of traditional ship propulsion systems. The intelligent energy management system uses solar panels to collect renewable energy, and optimizes energy distribution and use through the intelligent energy management system, which significantly improves energy utilization efficiency.

[0034] 2. The present invention ensures the power supply of the ship under various circumstances through the design of redundant daily power output and charging controller, and realizes the optimized distribution and use of energy and reduces energy waste through the intelligent energy management system. The intelligent energy management system can monitor and optimize the energy use of the ship in real time, ensure the stable operation of the key systems and equipment of the ship, and improve the performance and safety of the ship.

[0035] 3. The present invention uses solar energy to assist charging, thereby reducing dependence on external energy and increasing the self-sufficiency of the ship. The design of the energy storage unit enables the ship to store excess electrical energy when solar energy is sufficient, and use the stored electrical energy when needed, thereby enhancing the self-sufficiency of the ship. In long-term operation, it can significantly reduce energy costs and maintenance costs, and has obvious economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 The system diagram of a twin-engine, twin-propeller electric propulsion ship is shown in FIG. DETAILED DESCRIPTION

[0037] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0038] Embodiment 1

[0039] As attached Figure 1 As shown, the present invention provides a twin-engine twin-propeller electric propulsion ship, comprising:

[0040] Two asynchronous generator sets, as auxiliary energy sources for the ship's main power, are equipped with automatic synchronization and grid connection function. By configuring two 970kW asynchronous generator sets, they can provide stable power support when needed. The two asynchronous generator sets are key components of the ship's power system. These generator sets are designed to provide auxiliary power when the main power system's demand peaks. The automatic synchronization and grid connection function ensures that the generator sets can seamlessly synchronize with the ship's main power grid, both at startup and during operation. In addition, these generator sets are also equipped with advanced control systems to monitor their operating status and automatically disconnect when any abnormality is detected to prevent damage to the ship's power grid;

[0041] Two sets of lithium battery packs, as the propulsion batteries of the ship, are the core of the electric propulsion system. By configuring two sets of 774.1kWh lithium battery packs, the total power is 1548.2kWh, which can provide the necessary energy for the propulsion motor. The lithium battery pack is equipped with a thermal management system to maintain the battery at the optimal operating temperature. The thermal management system ensures that the battery remains in the optimal temperature range during operation through coolant circulation and temperature sensor monitoring. The thermal management system not only improves the efficiency of the battery, but also significantly extends its service life. When the ship is docked, the shore power is used to power the ship to maintain operation, and the propulsion battery is charged at the dock, reducing the use of asynchronous generator sets;

[0042] Two propulsion motors, connected to lithium battery packs, are used to drive the ship's twin propellers. Propulsion motors are the key link in ship power transmission. Two 800kW propulsion motors are connected to lithium battery packs and adopt high-efficiency energy-saving design to maximize energy conversion efficiency and reduce energy loss. The propulsion motors have fault diagnosis and protection functions and can monitor the operating status of the motors in real time. Once an abnormality is found, the system will automatically take measures, such as reducing power output or emergency shutdown, to protect the motors from damage;

[0043] Two propellers are connected to the propulsion motor to provide power for the ship. The propellers are the key to the ship's maneuverability and can accurately control the propulsion direction and speed of the ship to improve the maneuverability. The propellers have an automatic adjustment function to optimize the ship's maneuverability. The automatic adjustment function allows the propellers to automatically adjust the angle and speed according to the ship's navigation status and sea conditions to optimize the ship's maneuverability.

[0044] Centralized variable frequency electric control equipment is used to connect the power of asynchronous generator sets and lithium battery packs to the grid, drive propulsion motors, and provide daily power. It is the core of the entire electric propulsion system. Centralized variable frequency electric control equipment has remote monitoring and fault diagnosis functions, which improves the stability and reliability of the system. The remote monitoring and fault diagnosis functions enable operators to monitor the operating status of the system in real time and respond quickly when problems arise.

[0045] The solar charging device provides auxiliary charging for the lithium battery pack, increases the utilization rate of renewable energy, and reduces dependence on fossil fuels and greenhouse gas emissions by integrating the solar charging device.

[0046] Specifically, the solar charging device includes:

[0047] Solar panels, installed on the deck and sides of the superstructure of the ship, fully utilize the available space of the ship;

[0048] Inverter, used to convert the direct current generated by the solar panel into alternating current. The inverter has a maximum power point tracking function to improve the solar energy conversion efficiency. The maximum power point tracking function ensures the maximum solar energy conversion efficiency;

[0049] The intelligent energy management system is used to monitor the output of solar panels, battery status and energy consumption of the ship in real time, and adjust the output of solar panels and battery charging strategy according to forecasts and real-time data. The intelligent energy management system can automatically adjust the tilt angle of solar panels according to the ship's operating mode, energy consumption history data, sunshine intensity and duration and other conditions to maximize solar energy absorption and improve energy acquisition efficiency. The intelligent energy management system can automatically adjust the working status of solar panels and battery charging strategy according to weather forecasts and real-time data to reduce manual intervention. Through the intelligent energy management system, real-time monitoring and optimization of solar panel output and battery status can be achieved, thereby improving the overall energy utilization efficiency.

[0050] Furthermore, the area of ​​the solar panel is calculated according to the following formula: Among them: A is the required solar panel area in square meters, P is the expected solar power generation power in kilowatts, t is the sunshine time in hours, η is the conversion efficiency of the solar panel, usually between 15% and 20%, I is the average sunshine intensity in kilowatts per square meter. Through the above formula, the solar panel area required to meet the ship's energy needs can be accurately calculated. The calculation result is crucial for optimizing the layout of solar panels and improving energy utilization efficiency.

[0051] As can be seen from the above, when the ship starts, the variable frequency electronic control equipment connects the power of the asynchronous generator set and the lithium battery pack to the grid to provide initial power for the propulsion motor. During the operation stage of the ship, the solar panels begin to collect solar energy, and the inverter converts direct current into alternating current. The intelligent energy management system automatically adjusts the working status of the solar panels according to sensor data and weather prediction algorithms, optimizes the battery charging strategy, and the propulsion motor drives the twin propellers. The rudder propeller device adjusts the propulsion direction and speed of the ship as needed.

[0052] While the solar panels are collecting solar energy, the central processing unit continuously processes data from sensors, monitors the output power of the solar panels, the battery charging status and the energy consumption of the ship, and the user interface displays real-time data and system status for operators to monitor. When the electricity generated by the solar panels exceeds the current demand, the excess electricity is stored in the energy storage unit. When the solar panels output is insufficient or at night, the stored electricity is used to supplement system demand.

[0053] Embodiment 2:

[0054] As attached Figure 1 As shown, this embodiment is basically the same as the previous embodiment, except that the intelligent energy management system includes:

[0055] A set of sensors for monitoring the output power of solar panels, the charging status of batteries and the energy consumption of the ship. Sensors are the sensing organs of the intelligent energy management system. They are responsible for real-time monitoring of the output power of solar panels, the charging status of batteries and the energy consumption of the ship, and transmit these data to the central processing unit, providing real-time operation information so that the intelligent energy management system can make accurate decisions. When the sensor detects that the output power of the solar panel decreases, the intelligent energy management system can increase the discharge rate of the lithium battery to ensure that the power demand of the ship is met;

[0056] A central processing unit, which processes sensor data and predicts the intensity and duration of sunshine based on weather prediction algorithms. The central processing unit is the brain of the intelligent energy management system. It is responsible for processing data from sensors and making decisions based on these data. The central processing unit can use weather prediction algorithms to predict the future intensity and duration of sunshine, so as to adjust the working status of solar panels and battery charging strategies in advance. This prediction capability enables the system to use renewable energy more efficiently and reduce dependence on fossil fuels;

[0057] A user interface is used to display real-time data and system status for operators to monitor. The user interface is a window for operators to interact with the intelligent energy management system. Through the central processing unit and the user interface, operators can monitor and adjust energy distribution in real time to ensure efficient use of energy and manually adjust the system settings when necessary.

[0058] The above components work together to achieve efficient management and optimization of ship energy.

[0059] Specifically, the intelligent energy management system further includes a weather prediction algorithm for predicting the intensity and duration of sunshine. The weather prediction algorithm can predict the future intensity and duration of sunshine based on historical data and current weather conditions. The weather prediction algorithm is crucial for optimizing the working status of solar panels and the charging strategy of batteries. When the forecast shows that the sunshine intensity will increase in the next few hours, the tilt angle of the solar panel can be increased to maximize the absorption of solar energy.

[0060] Furthermore, the intelligent energy management system also includes automatic control logic for adjusting the output of solar panels and the charging strategy of batteries based on predictions and real-time data. The automatic control logic reduces the need for manual intervention and improves the system's level of automation. When the electricity generated by solar panels exceeds current demand, the excess electricity is automatically stored in the energy storage unit. When the solar panel output is insufficient or at night, the stored electricity is automatically used to supplement system demand.

[0061] Furthermore, it also includes an energy storage unit for storing excess electricity generated by solar panels, thereby improving the flexibility and self-sufficiency of energy utilization. The energy storage unit can store excess electricity when the solar panels generate excess electricity and release it when needed. This energy storage capability enables the ship to operate longer without external energy supply, thereby improving the autonomy and reliability of the ship.

[0062] As can be seen from the above, in the process of solar panels collecting solar energy, the central processing unit continuously processes data from sensors, monitors the output power of solar panels, the charging status of batteries and the energy consumption of the ship, and the user interface displays real-time data and system status for operators to monitor. When the electricity generated by solar panels exceeds current demand, the excess electricity is stored in the energy storage unit. When the output of solar panels is insufficient or at night, the stored electricity is used to supplement system demand. The energy efficiency and environmental friendliness of the ship are improved through the intelligent energy management system.

[0063] Embodiment three:

[0064] As attached Figure 1 As shown, this embodiment is basically the same as the previous embodiment, except that the centralized variable frequency electric control device includes:

[0065] Two redundant 200kVA daily power outputs provide high-quality daily AC power for the ship's daily loads. The redundant daily power outputs improve the reliability of the ship's power supply and ensure the stable operation of key systems and equipment. When one of the daily power outputs fails, the other daily power output can immediately take over to ensure that the ship's power supply will not be interrupted. The centralized frequency conversion electronic control equipment is the core of the ship's power system, responsible for connecting the power of the asynchronous generator set and lithium battery pack to the grid and providing stable daily power.

[0066] Specifically, it also includes a charging controller, which is used to optimize the battery charging process, enhance performance and reliability, ensure the safety and efficiency of battery charging through intelligent adjustment of the charging controller, extend the battery life, and improve the overall energy efficiency of the ship. The charging controller includes:

[0067] An input terminal connected to the output terminal of the inverter;

[0068] An output terminal connected to a battery;

[0069] A control unit that regulates the charging current and voltage of the battery.

[0070] Furthermore, the ship is an electric propulsion ship with two engines and two propellers, and the propulsion motor and the steering propeller device are installed in the steering propeller compartment at the rear. The integrated design not only improves the power efficiency of the ship, but also optimizes the ship's control performance. The coordinated work of the propulsion motor and the steering propeller device enables the ship to maintain stable power output and precise control in all sea conditions.

[0071] As can be seen from the above, during the use of the ship, the variable frequency electric control equipment provides two redundant daily power outputs to ensure the stable power supply of the ship's daily loads. The charging controller adjusts the charging current and voltage according to the state of the lithium battery pack to optimize the charging process. When the ship arrives at the destination or needs to shut down, the intelligent energy management system will gradually reduce the energy output to ensure the safe shutdown of the system. During the use of the ship, the intelligent energy management system provides assistance and monitors the output power of the solar panels, the charging state of the batteries and the energy consumption of the ship through a set of sensors. The central processing unit processes these data and predicts the intensity and duration of sunshine according to the weather prediction algorithm. The user interface displays real-time data and system status for operators to monitor. When the electric energy generated by the solar panels exceeds the current demand, the excess electric energy is stored in the energy storage unit, and when the solar panels are insufficient or at night, the stored electric energy is used to supplement the system demand. In the above work flow, the dual-engine dual-propeller electric propulsion ship of the present invention can achieve efficient, environmentally friendly and reliable operation, providing an innovative solution for the shipping industry.

[0072] The embodiments of the present invention are provided for the purpose of illustration and description. Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in this field can change, modify, replace and deform the above embodiments within the scope of the present invention.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples" or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0075] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved, and other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

Claims

1. A twin-engine, twin-propeller electric propulsion ship, characterized in that: include, Two asynchronous generator sets as auxiliary energy sources for the ship's main power; Two sets of lithium battery packs, used as propulsion batteries for the vessel; Two propulsion motors, connected to a lithium battery pack, are used to drive the vessel’s twin propellers; Two rudder propellers connected to the propulsion motor to provide power for the ship; Centralized variable frequency electric control equipment, used to connect the power of asynchronous generator sets and lithium battery packs to the grid, drive propulsion motors, and provide daily power; The solar charging device provides auxiliary charging for the lithium battery pack and increases the utilization rate of renewable energy.

2. The electric propulsion ship with two engines and two propellers as claimed in claim 1, characterized in that: The solar charging device comprises: Solar panels, installed on the decks and sides of superstructures of ships; Inverters, which convert the direct current generated by solar panels into alternating current; Intelligent energy management system for real-time monitoring of solar panel output, battery status and vessel energy consumption, and adjusting solar panel output and battery charging strategy based on forecast and real-time data.

3. The electric propulsion ship with two engines and two propellers as claimed in claim 2, characterized in that: The area of ​​the solar panel is calculated according to the following formula: Where: A is the required solar panel area, P is the expected solar power generation, t is the sunshine time, η is the conversion efficiency of the solar panel, and I is the average sunshine intensity.

4. The electric propulsion ship with two engines and two propellers as claimed in claim 2, characterized in that: The intelligent energy management system comprises: a set of sensors to monitor the solar panels’ output, the battery’s state of charge and the vessel’s energy consumption; a central processing unit to process sensor data; A user interface that displays real-time data and system status.

5. The electric propulsion ship with two engines and two propellers as claimed in claim 2, characterized in that: The intelligent energy management system further includes a weather prediction algorithm for predicting the intensity and duration of sunshine.

6. The electric propulsion ship with two engines and two propellers as claimed in claim 2, characterized in that: The smart energy management system also includes automatic control logic for adjusting the output of the solar panels and the charging strategy of the batteries based on predicted and real-time data.

7. The electric propulsion ship with two engines and two propellers as claimed in claim 1, characterized in that: The centralized variable frequency electric control equipment includes: Two redundant daily power outputs provide high-quality daily AC power for the ship's daily loads.

8. The electric propulsion ship with two engines and two propellers as claimed in claim 1, characterized in that: Also included is a charging controller for optimizing the charging process of the battery, the charging controller comprising, An input terminal connected to the output terminal of the inverter; An output terminal connected to a battery; A control unit that regulates the charging current and voltage of the battery.

9. The electric propulsion ship with two engines and two propellers as claimed in claim 1, characterized in that: Also included is an energy storage unit for storing excess electricity generated by the solar panels.

10. The electric propulsion ship with two engines and two propellers as claimed in claim 1, characterized in that: The ship is an electric propulsion ship with two engines and two propellers, and the propulsion motor and the steering propeller device are installed in the steering propeller compartment at the rear.

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