Coal Methane - Ventilation Rate
Hold-ventilation rate required to keep methane below 20 % LEL during coal voyage - fresh-air make-up calculation.
Required ventilation
500m³/h
Formula, assumptions, and limits
CH₄ LEL = 5 %. Target 20 % of LEL = 1 % vol. Forced ventilation mandatory during loading + first 24 h. IMSBC coal schedule. Monitor CH₄ twice daily.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Lower explosive limit (5 % for methane) | - | safety data | |
| Ventilation flow rate | m³/h | fan curve |