Electric propulsion system (Electric propulsion of ship's power generation system)
Features of the electric propulsion system
- Total output becomes smaller.
- The most suitable load balance of a generator can be realized.
- In-ship system is simplified.
- Arrangement of equipment can be designed freely and a wide cargo space can be kept.
- Ship maneuverability is improved by high torque at low speed navigation.
- Comfortableness is improved due to low vibration, low noise.
Comparison of an electric propulsion ship (8,444G/T, cement carrying vessel) and an existing ship
| Electric propulsion ship | Existing ship | |
|---|---|---|
| Main engine | - | 4,260kWm × 1 unit |
| Propulsion motor | 2 units | - |
| For generator | 1,600kWe × 3 units | 1,600kWe × 1 unit |
| 800kWe × 1 unit | 660kWe × 2 unit | |
| Emergency engine for generator | 250kWe × 1 unit | 250kWe × 1 unit |
| Total output | 5,850kWe (6,285kWm) | 5,4,260kWm + 3,170kWe(3,425kWm) = 7,685kWm |
| Designed speed of ship | Approx. 13 knot | Approx. 13 knot |