Auxiliary Engine Load Factor

Sum the average hotel, cargo and reefer loads to get the aux-engine average load at sea, in port, and at anchor. Used as an input to voyage fuel and EEDI AE terms.

DesignAux engine

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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

P_\text{AE} = P_\text{hotel} + P_\text{deck} + P_\text{nav} + P_\text{ER} + P_\text{reefer} + P_\text{pump}

Symbol	Meaning	Unit
$P_\text{AE}$	Average auxiliary-engine electrical load	kW
$P_\text{hotel}$	Hotel, galley, HVAC	kW
$P_\text{deck}$	Routine deck machinery	kW
$P_\text{nav}$	Bridge, navigation and communications	kW
$P_\text{ER}$	Engine-room auxiliaries (pumps, fans, purifiers…)	kW
$P_\text{reefer}$	Reefer plugs at average utilisation	kW
$P_\text{pump}$	Cargo pump / compressor	kW
$P_\text{installed}$	Total installed aux generator capacity	kW

Source: IMO MEPC.231(65) - EEDI guidelines §2.5.6 aux power table; ABS - *Ship Energy Efficiency Measures Advisory*

In short

Sum hotel, deck, reefer and cargo loads to get the aux-engine average load and load factor.

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