LNG GCU - Required Capacity
Minimum Gas Combustion Unit (GCU) heat-release rate required to burn 100 % of boil-off gas at laden-passage conditions with the DF engines unavailable.
BOG mass flow
3,187.5kg/h
Heat release
48,255kW
GCU capacity
48.26MW
Formula, assumptions, and limits
Design GCU for laden-passage BOR at tank design pressure, not warmed-up condition. Typical values 7–10 MW for 174,000 m³ LNGC. Class (ABS, DNV) often require 150 % margin over worst-case.
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| Laden cargo volume | m³ | cargo plan | |
| LNG liquid density | kg/m³ | Klosek-McKinley | |
| Boil-off rate | %/day | tank insulation spec | |
| Gross calorific value | MJ/kg | ISO 6976 |