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Cofferdam Heating - Duty & Surface Temperature

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

Formula

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

Symbol legend

SymbolMeaningUnitSource
$U$Bulkhead overall heat-transfer coefficientW/m²·Kinsulation data sheet
$A$Heat-transfer areaGA drawings
$\Delta T$Temperature differenceKtank/cofferdam gauges

Sources

  • IGC Code 2016 - Ch. 4.
  • GTT NO96 / Mark-III technical bulletins.