Fuel savings from reducing voyage speed - cubic-law estimate compared to baseline speed over a fixed route.
Formula
$$ \Delta m = \text{FOC}_0 \cdot \frac{D}{V_0} - \text{FOC}_0 \cdot \left(\frac{V}{V_0}\right)^3 \cdot \frac{D}{V} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $V_0$ | Baseline speed | kn | voyage orders |
| $V$ | Reduced speed | kn | JIT / economics |
| $\text{FOC}_0$ | Baseline fuel consumption | t/day | engine data |
Sources
- IMO MEPC.65 - Slow Steaming guidance.