A truck engine consumes diesel at a rate of 30 L/h and delivers 65 kW of power

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A truck engine consumes diesel at a rate of 30 L/h and delivers 65 kW of power to the wheels. If the fuel has a heating value of 43.5 MJ/kg and a density of 800 kg/m3, determine
(a) The thermal efficiency of the engine.
(b) The waste heat rejected by the engine.
(c) How does the engine discard the waste heat?
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