CHIEF ENGINEER Unit 17 FUEL CONSUMPTION Q2 Answer

9. A vessel has bunkered 250 tonnes of diesel fuel of which 10% is assumed to be unpumpable. The average combined sea load of the vessel is 2800kW with a stated specific consumption of 0.35kg/kWh at a speed of 18 knots.
   Calculate EACH of the following:
   (a) the daily fuel consumption of the vessel;(4)
   (b) the safe steaming range of the vessel.(6)

Given Data

• Fuel bunkered = 250 tonnes = 250,000 kg
• Unpumpable = 10% = 25,000 kg
• Usable fuel = 225,000 kg
• Average power load = 2800 kW
• Specific fuel consumption (SFC) = 0.35 kg/kWh
• Speed = 18 knots
• 1 day = 24 h