Time to warm a heated cargo from current temperature to discharge-pumpable temperature given boiler steam output and cargo mass - used in HFO and asphalt loading plans.
Formula
$$ t = \frac{m \cdot c_p \cdot \Delta T}{\eta \cdot \dot m_{steam} \cdot h_{fg}} $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $m$ | Cargo mass | t | ullage × density |
| $c_p$ | Specific heat | kJ/kg·K | cargo data sheet |
| $\Delta T$ | Temperature rise | K | operations plan |
| $\dot m_{steam}$ | Steam mass flow | kg/h | boiler meter |
| $h_{fg}$ | Steam latent heat | kJ/kg | IAPWS tables |
Sources
- ISGOTT 6th Ed..