Brake Thermal Efficiency
Brake thermal efficiency from SFOC and fuel LCV. η_th = 3600 / (SFOC · LCV).
Brake thermal efficiency
50.79%
Formula, assumptions, and limits
Modern long-stroke two-stroke with Miller timing can reach 52–54 % on HFO (SFOC ≈ 167, LCV ≈ 40.5). Four-stroke medium-speed 45–48 %. Spark-ignited gas engines 42–46 %.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Specific fuel oil consumption | g/kWh | NOx technical file | |
| Lower calorific value | MJ/kg | ISO 8217 / MEPC.364 | |
| Brake thermal efficiency | - | result |