Ship Power Generation System with Secondary Battery for Fuel Efficiency
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Solution Overview
Problem
Existing power generation systems for ships experience deterioration in fuel efficiency during normal sailing due to generators operating under low load, as they are designed for peak power requirements during entry and departure.
Innovation Solution
A power generation system that includes multiple generators and a secondary battery, where the control device manages power distribution to operate generators under high load during normal sailing, charging the secondary battery for peak power needs, thereby improving fuel efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If generators are designed with rated output based on peak power requirements during entry and departure, then maximum power availability is ensured, but fuel efficiency deteriorates during normal sailing due to low load operation
Solution Approach 1:
The power generation system is segmented into multiple generators, where during normal sailing only one generator operates at high load while others are on standby. This segmentation allows the operating generator to maintain high efficiency while the system as a whole provides sufficient power capacity for peak demands.
Solution Approach 2:
The system performs preliminary action by pre-charging the secondary battery during normal sailing operations. This stored energy is then available to supplement power during entry and departure, allowing the generator to maintain high load operation without compromising peak power availability.
2Power
If multiple generators are operated in parallel during normal sailing to share load, then power availability is maintained, but fuel efficiency deteriorates due to each generator operating at low load
Solution Approach 1:
Instead of operating multiple generators in parallel at low load, the system segments the operation so that one generator operates alone at high load during normal sailing. The secondary battery serves as a supplemental power source, effectively replacing the need for multiple low-load generators and improving overall fuel efficiency.
3Use of energy by moving object
If a single generator operates at high load during normal sailing to improve fuel efficiency, then fuel consumption is reduced, but power availability during peak demand may be insufficient
Solution Approach 1:
The secondary battery acts as an intermediary power source that bridges the gap between single generator high-load operation and peak power demands. During entry and departure, the battery supplements the generator's output, ensuring sufficient power availability while allowing the generator to maintain high efficiency operation during normal sailing.
Solution Approach 2:
The system performs preliminary charging of the secondary battery during normal sailing, storing energy in advance for use during peak demand periods. This preliminary action ensures that when entry and departure occur, the battery can immediately supplement power without requiring the generator to drop to low load operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration allows for improved fuel efficiency by maintaining generators under high load during normal sailing, reducing fuel consumption and supporting propeller rotation using the secondary battery.
Implementation Method 1
a secondary battery 14 that stores power output from the plurality of generators 11 to 13 and supplies the stored power to the interior of the ship
Data Source
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Figure 3
AI summary
This power generation system for ships comprises: a plurality of generators (11, 12, 13) that supply power to the interior of a ship; a secondary battery 14 which stores the power output from the plurality of generators (11, 12, 13) and supplies the stored power to the interior of the ship; and a control device 20 that supplies the power to the ship using the first generator 11 among the plurality of generators (11, 12, 13) and the secondary battery 14 during normal operation of the ship. The control device 20 charges the secondary battery 14 so as to enable output of power equivalent to that of the first generator 11 during inward/outward clearance of the ship.