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SFOC = Mass of fuel burnt to produce a unit power in 1 hour.

SFOC = Mass of fuel / kW in 1 hour

Density = Mass / Volume

Mass of fuel = Density X Volume

SFOC = Mass of fuel / kW power in 1 hour

You get the value is Kg, But to specify in Grams you have to multiply the answer by 1000.

Let us calculate SFOC with given values,

For a ship X, the daily fuel oil consumption is 75 Tonnes.

Power in kW = 11520

BHP power = 15,448

To calculate SFOC in g/ kWhr,

Total fuel consumption / day = 75 tonnes

Fuel consumption / Hour = 75/24 = 3.125 Tonnes = 3125 Litres

Specific Gravity of fuel used = 0.9375 (Usually given in BDN- Bunker delivery note)

SFOC = 3125 X 0.9375 /11520

SFOC = 0.2543(Litres) X 1000 (To get it in Grams/kwhr)

SFOC = 254.3 g/kWhr

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