Vapor-return gas volume during loading - matches the liquid load rate corrected for tank ullage temperature, used to size VECS manifold.
Formula
$$ \dot V_{vap} = \dot V_{liq} \cdot \frac{T_{tank}}{T_{ref}} $$Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $\dot V_{liq}$ | Cargo loading rate | m³/h | loading plan |
| $T_{tank}$ | Tank vapor temperature | K | tank gauge |
| $T_{ref}$ | Terminal reference T | K | terminal spec |
Sources
- MARPOL Annex VI Reg. 15.