In merchant ships the optimum design, maximum thermal efficiency and minimum fuel consumtion are arranged for full power condition. Specific consumtion is much higher when speed are at maximum. In IC engines such as diesel generators has peak thermal efficiency at 70% of maximum load. When all units developing equal powers. The power estimation method provides fuel consumption values. The rate of fuel consumption is the amount of fuel used in a unit time eg. Tonne/day.
Since fuel consumption @ power
Where power= tone2/3 x V3
_____________
Admiralty coefficient
Then fuel consumtion/day=_displ2/3 x v3_______________
Fuel coefficient
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