Electric propulsion systems
Features of the electric propulsion system
- Smaller total output.
- Ideal generator load balance can be achieved.
- In-ship system is simplified.
- Arrangement of equipment can be designed freely allowing for a wide cargo space.
- Ship manoeuvrability is improved by high torque at low speed navigation.
- Comfort is improved due to low vibration and 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 | ー | 4,260kWm × 1 unit | |
| Propulsion motor | 2 units | ー | |
| 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 | |