Calculation of Marine Fuel Oil Supply Pump

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Marine fuel oil pump can be also called fuel oil service pump, fuel oil supply pump fuel oil booster pump or fuel oil circulation pump. It can be in centrifugal, gear, three screw and other types.

The supply pump shall keep sufficient fuel pressure before the engine.
The volumetric capacity must be at least 300 % of the maximum fuel consumption of the engines, including margins for:
▪ Tropical conditions
▪ Realistic heating value and
▪ Tolerance
To reach this, the supply pump has to be designed according to the following formula:

 Qp = P1 x brISO1 x f3

 Where :
Qp (l/h) = Required supply pump capacity with MDO 45 °C
P1 (kW) = Engine output power at 100 % MCR
brISO1 (g/kWh) = Specific engine fuel consumption (ISO) at 100 % MCR:
f3 (l/g) = Factor for pump dimensioning: f3 = 3.75 x 10-3



FO service Diagram c/w MFO supply pump (1&2P-008)

In case more than one engine or different engines are connected to the same fuel system, the pump capacity has to be increased accordingly.

The delivery height shall be selected with reference to the system losses and the pressure required before the engine. 
Normally the required delivery height is 10 bar.

Hopefully helpfully 😊
 marinengcalc.blogspot.com

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