Khswer: 0.52 0.A naturally-aspirated dual-fuel engine is running on methane and pilot diesel. The...
A 3 litre, four-stroke, four-cylinder CI engine running at 3000 rpm produces 48 kW of brake power. Brake thermal efficiency is 30% and the calorific value of fuel is 42 MJ/kg. Assume density of air at ambient condition is 1.1.81 kg/m3, air-fuel ratio 21:1 and mechanical efficiency 0.8. Determine: (a) Rate of fuel flow into the engine (kg/s) (b) Rate of air flow into the engine (kg/s) (c) Mass rate of exhaust flow (kg/s) (d) Volumetric efficiency (e) Indicated thermal...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of free air inducted per minute. The volumetric efficiency is 82 % at 3600 rpm referred to atmospheric condition of 1 bar and 27 oC. A rotary compressor which is mechanically coupled to the engine is used to supercharge the engine. The pressure ratio and the isentropic efficiency of the compressor are 1.6 and 75 % respectively. Calculate the percentage increase in brake power due...