Engine - Thermal Efficiency
Brake thermal efficiency from SFOC and fuel NCV - ~50 % typical for slow-speed 2-stroke, 44 % for medium-speed 4-stroke.
Brake thermal eff
507.9%
Formula, assumptions, and limits
Modern 2-stroke 50-51 % at ~165 g/kWh. Medium-speed 44-46 %. Combined cycle with WHRS up to 55 %. Fuel NCV 40-43 MJ/kg typical HFO/VLSFO.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Specific fuel consumption | g/kWh | shop test | |
| Net calorific value | MJ/kg | BDN |