Explain the Performance, Combustion and Emission Characteristics of CI engines with alternate fuels
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Explain the Performance, Combustion and Emission Characteristics of CI engines with alternate fuels
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- a. Discuss the different parameters being analyzed in the overall performance of the engine b. What is the difference between RFG and RFS? c. Explain the difference of the combustion processes involved between SI and CI engines?Discuss the importance of the fuel supply system in an internal combustion engine.: (a) Discuss the performance and emission characteristics of a stationary diesel engine. (b) Explain the objectives, merits and demerits of EGR. (c) Explain about M type combustion chamber with a neat sketch.
- How does fuel combustion affect the performance of an engine?on No. 18:(a) Explain the Performance, Combustion and Emission Characteristics of CI engines with these alternate fuels. (b) The following particulars were obtained in a trial on a four stroke gas engine: Duration of trial Revolutions = 14000, Number of missed cycle = 500, Net brake load = 1470 N, Mean effective pressure = 7.5 bar, = 1 hour, Gas consumption = 20000 liter, L.C.V. of gas at supply conditions = 21 KJ/Liter, Cylinder diameter = 250 mm, Stroke = 400 mm, Effective brake circumferences = 4 m, Compression ratio = 6.5:1 Calculate i) ii) iv) Indicated power Brake power Mechanical efficiency Indicated thermal efficiency Tent & Technical StudiesWhat is meant by abnormal combustion in Si engine ? Discuss the various factors which affect abnormal combustion requirements
- Why do we need very high pressure for fuel injection in a diesel engine?Draw and explain four strokes of Otto cycle based internal combustion engine. Also label various components.FOR ALL THE TEMPERATURE, PLEASE ADD +9 1. COMPARE THE THERMAL EFFICIENCIES OF OTTO, DIESEL, AND DUAL COMBUSTION CYCLES UNDER THE FOLLOWING CONDITIONS. a. FOR THE SAME COMPRESSION RATIO AND HEAT ADDITION b. FOR THE SAME COMPRESSION RATIO AND HEAT REJECTION
- Ignition delay can be considered as the duration between the start of injection and startof combustion in diesel engines.• Starting from the injection of the fuel spray, explain the events happening(physical and chemical) in the ignition delay phase. • Explain the advantage of using pilot injection in terms of diesel knockingDiscuss the difference between gasoline and diesel engines. Explain how octane rating affects gasoline engine performance.a. What is the specific brake work (kJ/kgfuel) of a 4 L single-cylinder propane engine operating stoichiometrically, if the heat transfer to the coolant is 17 kW, the air and fuel enter the engine at 298 K, the exhaust is 700 K, and the propane mass flow rate is 1.2 g/s? b. 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/kmolfuel. What is the engine’s thermal efficiency and power?