LNG Tank Cool-Down Time

Approximate time to cool tank structure from ambient to −162 °C using LNG spray injection.

LNGCool-down

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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

t = \frac{m \cdot c_p \cdot \Delta T}{\eta \cdot \dot m_\text{spray} \cdot h_{fg}}

Symbol	Meaning	Unit
$m$	Tank mass to cool	t
$c_p$	Specific heat of steel	kJ/(kg·K)
$ΔT$	Temperature drop	K
$\dot m_\text{spray}$	Spray flow	t/h
$η$	Spray efficiency (not all heats metal)

Source: SIGTTO - Cargo Operations

Approximate time to cool tank structure from ambient to \u2212162 \u00b0C using LNG spray injection.