Specific Fuel Consumption
The amount of fuel needed to provide a given power for a given period.
| Ramjet | 0.61 kg/kWh |
| Turbo-prop | 0.49 kg/kWh |
| Otto Cycle | 0.3 kg/kWh |
| Diesel Cycle | 0.24 kg/kWh |
| Otto-Compound engine | 0.23 kg/kWh |
| Turbocharged Diesel | 0.23 kg/kWh |
| Turbocharged & Intercooled Diesel | 0.22 kg/kWh |
| Diesel-Compound engine | 0.21 kg/kWh |
The engine efficiency is the reciprocal of the product of the specific fuel consumption and the lower heating value of the fuel.
Thus where the SFC is given in kg/kWh:
- diesel engine efficiency = 1/(SFC x 11.9531)
- gasoline engine efficiency = 1/(SFC x 12.2225)
See also: Brake Specific Fuel Consumption, Fuel Consumption, Thrust Specific Fuel Consumption.
Subjects: Automotive Engines Transport