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Engineering · Mechanical Engineering
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internal combustion engine
Problem (4 The results of an experiment on four stroke, diesel engine is as follows: Friction power: 10 KW. Engine speed-1750 r used-15 kg/hr, Calorifie value of the fuel-42000 KJ/Kg, Air supplied-4.75 kg/min, Mass flow rate of cooling water-16 kg/min, outlet temperature of cooling water-65.8 °C, Temperature of exhaust gases-400 °C, Room temperature-20.8 °C, Cp for water-4.19 KJ/kg k, Cp for exhaust gases-l.25 KJ/kg k. Determine: (1) The mechanical efficiency (2) Perform an energy balance for this condition. (13 marks) pm, Brake torque-332 J, Fuel
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