Shaft Generator - Output Capability
Shaft-generator available electrical power given main-engine load and PTO design capacity - enables one-generator-at-sea config on slow-steaming.
Available PTO
1.21MW
Available PTO
1,211kW
Formula, assumptions, and limits
Shaft-gen removes need for diesel-generator at sea → ~12 % voyage fuel saving on long legs. Needs variable-frequency drive if running off main-engine shaft with fixed-pitch propeller.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| PTO rated capacity | MW | maker data | |
| Main-engine output | MW | engine performance | |
| Propulsion reserve factor | - | operating policy | |
| PTO efficiency | - | maker curve |