Question: A four-stroke 6 L engine is fueled lean with methane at an equivalence ratio ???? = 0.8. It operates at 2000 rpm with a volumetric

A four-stroke 6 L engine is fueled lean with methane at an equivalence ratio ???? = 0.8. It operates at 2000 rpm with a volumetric efficiency of 0.80. The exhaust temperature is 800 K, and the heat transfer to the coolant is 3.4 10⁵ kJ/kmol_fuel. What is the engines thermal efficiency and power?

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