Question

Gasoline enters a combustion chamber, at 1 atm, 298 K and a rate of 0.08 kg/min, where it burns steadily and completely, with 70% excess air that enters the chamber at 1 atm, 200 K. The exit temperature of the combustion products is 800 K. Use the IG mixture model for gases. Represent gasoline with liquid octane.

a. Determine the mass flow rate, $\dot{m}$ [kg of air/min], of air.

b. Determine the rate of heat transfer, $\dot{Q}$ .

c. What is the rate of heat transfer if the excess air used is only 20%

Answer 1

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