Fuel consumption and emissions from a PEM or SOFC marine fuel cell running hydrogen, ammonia or methanol.
Formula
$$ F = \frac{P \cdot h}{\eta_\text{FC} \cdot \text{LCV}} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $F$ | Fuel consumed over the period | t | result |
| $P$ | Average electrical output | kW | operating profile |
| $h$ | Running hours | h | operating profile |
| $\eta_\text{FC}$ | Fuel cell electrical efficiency | fraction | PEM 0.45–0.55; SOFC 0.55–0.65 |
| $\text{LCV}$ | Lower calorific value of the fuel | MJ / kg | MEPC.364(79) / ISO 8217 |
Hydrogen and ammonia FCs have tank-to-wake $C_f = 0$. Upstream carbon intensity (WtW) lives in the FuelEU GHG-intensity calculation, not here.
Sources
- DNV - Fuel Cell Systems in Maritime Applications.
- Ballard Power Systems - FCwave marine fuel cell.
- IMO MSC.485(101) - Interim Guidelines for the Safety of Ships Using Fuel Cell Power Installations.