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.

LNGGCUBoil-off

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This calculator requires JavaScript to compute its result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

\dot Q_{GCU} = \frac{V_L \rho_L \cdot BOR}{24} \cdot \text{GCV}

Symbol	Meaning	Unit
$V_L$	Laden cargo volume	m³
$\rho_L$	LNG liquid density	kg/m³
$BOR$	Boil-off rate	%/day
$\text{GCV}$	Gross calorific value	MJ/kg

Source: IGC Code 2016 - Ch. 8; SIGTTO Gas-Up & Cool-Down Guidance

In short

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.

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