A driver completely fills her car\'s fuel tank, which has volume 62 litres, at a

Question

A driver completely fills her car's fuel tank, which has volume 62 litres, at a service station with fuel that has a heating value of 46.4 MJ/kg and density of 680 kg/m3. Assume that the driver has timed her fuelling to perfection so that the fuel tank is completely empty at the start of fuelling. Assume also that the flow rate of fuel into the tank is constant over the time of fuelling, which is 61 seconds.

Calculate the average flow of chemical power in megawatts (MW) into the fuel tank during fuelling.

Explanation / Answer

flow rate of fuel leters per second= 62/61 ls-1 ;

flow rate of fuel, mass per second(M)=(62/61)*(680)

power= enrgy flow per second= M*46.4=32069.25 MW

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