Cargo Heating - Fuel Cost per Voyage

Voyage fuel cost to keep a heated cargo (HFO, asphalt, vegoil) above its discharge-pumpable temperature given ambient seawater and tank U-value.

HeatingCargoEconomics

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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 \Delta T, \quad \dot m_{fuel} = \frac{\dot Q}{\eta_b \cdot \text{NCV}}

Symbol	Meaning	Unit
$U$	Tank overall heat-transfer coefficient	W/m²·K
$A$	Heat-loss area	m²
$\Delta T$	Cargo-ambient ΔT	K
$\eta_b$	Boiler efficiency
$NCV$	Net calorific value	MJ/kg

Source: ISO 8217 - Marine fuel specifications; OCIMF ISGOTT 6th Ed

Voyage fuel cost to keep a heated cargo (HFO, asphalt, vegoil) above its discharge-pumpable temperature given ambient seawater and tank U-value.