Cargo Heating Duty (Q = U·A·ΔT)

Heat duty to hold tank cargo at setpoint - steady-state loss through tank walls only.

TankerHeating

Overall U-valueW/(m²·K)Uncoated side shell 3–5; insulated side shell 1–2; tank deck 3–6.Tank wetted-wall aream²Cargo setpoint°CSea / ambient T°C

ΔT: 40.0K

Heat duty: 80.0kW

Changing the inputs requires JavaScript. The calculator above shows its default inputs and result. The formula, symbols, and regulatory sources are shown in the Formula section below.

Formula, assumptions, and limits

Q = U \cdot A \cdot \Delta T

Symbol	Meaning	Unit
$U$	Overall heat-transfer coefficient	W/(m²·K)
$A$	Heat-transfer surface area	m²
$ΔT$	Cargo − sea/ambient	K

Source: OCIMF - Cargo heating guidance

In short

Heat duty to hold tank cargo at setpoint - steady-state loss through tank walls only.

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