Ship Navigation Control Device for Dynamic Fuel Optimization
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Solution Overview
Problem
Existing ship energy-saving technologies, such as fixed rotational speed or power settings, result in inefficient fuel-saving due to prolonged acceleration and deceleration processes and inadequate response to changing water and wind resistances, leading to suboptimal fuel consumption and emissions.
Innovation Solution
A method and device that dynamically control the main engine's throttle opening degree based on real-time ship speed relative to the ground and water, adjusting oil supply to minimize fuel consumption by matching instantaneous oil supply with changing resistances, with upper and lower rotational speed limits to ensure efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the main engine is controlled under a relatively fixed operating state, then the operation is simple, but the fuel-saving efficiency is poor
Solution Approach 1:
The patent applies dynamics by transitioning from fixed operating state control to dynamic adjustment of the main engine's instantaneous oil supply amount. The control device continuously monitors ship speed relative to ground and water, and automatically adjusts oil supply based on real-time resistance changes, making the system adaptive rather than static.
Solution Approach 2:
The patent implements feedback control by using detectors to monitor ship speed relative to ground and water, comparing these values to determine resistance changes, and using this information to adjust the instantaneous oil supply amount. This closed-loop feedback system optimizes fuel consumption based on actual operating conditions.
2Loss of energy
If the ship sailing speed is reduced, then the fuel consumption is lowered, but the sailing time is extended
Solution Approach 1:
The patent changes the parameter of instantaneous oil supply amount dynamically based on resistance conditions. Instead of maintaining a fixed low speed for fuel savings, the system adjusts oil supply parameters in real-time, allowing the ship to maintain higher speeds when resistance is low while consuming less fuel when resistance increases, thus avoiding the time penalty of reduced sailing speed.
Solution Approach 2:
The control device preliminarily adjusts the instantaneous oil supply amount before significant resistance changes affect fuel consumption. By detecting speed differences between ground and water early, the system proactively optimizes oil supply, preventing excessive fuel consumption before it occurs rather than reacting after the fact.
3Productivity
If the instantaneous oil supply amount is increased to reduce acceleration time, then the productivity is improved, but the fuel consumption increases
Solution Approach 1:
The patent applies dynamics by making the instantaneous oil supply amount adjustable based on real-time conditions rather than fixed. During acceleration phases, the system dynamically increases oil supply to maintain productivity, then reduces it during steady-state cruising to minimize fuel consumption, optimizing the trade-off between productivity and energy use.
Solution Approach 2:
The control device implements periodic adjustment of oil supply amount based on detected resistance changes. It periodically monitors speed differences between ground and water, and adjusts oil supply in periodic cycles - increasing during acceleration needs and reducing during steady-state operation - thereby achieving both productivity and fuel efficiency.
Data Source
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AI summary
The invention discloses a method and device for controlling energy-saving sailing of a ship. The method comprises the steps of changing the operating parameters of the ship correspondingly when the resistance of the ship changes during routine sailing, controlling the current opening degree of an accelerator to increase the instantaneous oil supply amount of a main engine of the ship if the resistance of the ship becomes smaller, and controlling the current opening degree of the accelerator to reduce the instantaneous oil supply amount of the main engine of the ship if the resistance of the ship becomes larger. Compared with the prior art, the method and device have the advantages that energy waste is reduced greatly and sailing cost is reduced.