Cofferdam Heating - Duty & Surface Temperature

Cofferdam glycol-heater duty required to keep inner-hull steel above the brittle-fracture limit (+5 °C) given cargo-tank temperature and ambient seawater.

LNGCofferdamHeating

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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 = U \cdot A \cdot (T_{cofferdam} - T_{tank})

Symbol	Meaning	Unit
$U$	Bulkhead overall heat-transfer coefficient	W/m²·K
$A$	Heat-transfer area	m²
$\Delta T$	Temperature difference	K

Source: IGC Code 2016 - Ch. 4; GTT NO96 / Mark-III technical bulletins

In short

Cofferdam glycol-heater duty required to keep inner-hull steel above the brittle-fracture limit (+5 \u00b0C) given cargo-tank temperature and ambient seawater.

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