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20 J A6-cylinder 4-stroke S.l. engine having a piston displacement...
1. (30P) A twenty-cylinder MTU 4 STROKE 20V 4000 M93 marine diesel engine is designed to...
1. (30P) A twenty-cylinder MTU 4 STROKE 20V 4000 M93 marine diesel engine is designed to develop 3490 kW brake power at 1800 rpm. The bore is 170mm and stroke length is 210 mm for each cylinder and bsfc is 205 g/kWh. The calorific value of the petrol is 42 800kJ/kg. The inlet air manifold conditions are 80 kPa and 313 K. and The engine has a volumetric efficiency of 0.82. Calculate: a) Displacement (litre) b) Bmep (kPa) c) Fuel...
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with...
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with air/fuel ratio of 14.7. The engine has a volumetric efficiency of 90%, with a bore (B) and stroke (S) related as B:S=1.1:1. You can assume the density of fresh air is 1.16 kg/mº. Please calculate: (30 Points) a) Displacement of each cylinder, and length of stroke; b) Average velocity of piston; (This is a very simple question. You need find the distance piston moved...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of 2.4 liters (0.0024 m). The engine operates on a hydrocarbon fuel with H/C = 1.9 and MW =105 kg/kmol, at an equivalence ratio of 1.05. Each cylinder has one fuel injector fired once per cycle. The flow rate for the injector when continuously open is 0.003 kg/s. Consider the wide-open throttle, peak power operating point where the design volumetric efficiency is 90% and the...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
Please answer all PROBLEM 1 A three-litre four-stroke diesel engine develops 12 kW per m3 of...
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...
Only parts (e) and (f) is required Thanks. 2. An 8 cylinder 5.6L (total displacement) 4-stroke...
Only parts (e) and (f) is required
Thanks.
2. An 8 cylinder 5.6L (total displacement) 4-stroke diesel engine has a compression ratio of 19.3 and a cutoff ratio of 1.4. The temperature and pressure at the beginning of the compression stroke is 27°C and 100 kPa. The maximum pressure in the cycle is 7400 kPa. Assume variable properties (Table A-17). a. Draw the P-v diagram b. Determine the maximum temperature during the cycle c. Determine the amount of heat added...
A 4-stroke 3 litre V6 spark ignition petrol engine has a maximum power output of 100kW...
A 4-stroke 3 litre V6 spark ignition petrol engine has a maximum power output of 100kW at 5500rev/min, and a maximum torque of 236Nm at 3000rev/min. The minimum sfc is 0.090 kg/MJ at 3000 rpm, and the air flow rate is 0.068m²/s. The compression ratio is 8.9:1 and the mechanical efficiency is 90%. The engine was tested under ambient conditions of 20°C and 1 bar. Take the calorific value of fuel to be 44MJ/kg. (a) Determine the power output at...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a certain operating point onboard a vessel: (Geometric) compression ratio: Volumetric ratio: Combustion efficiency Heat input efficiency: Mechanical efficiency Entrapped air efficiency: Intake manifold pressure: Intake manifold temperature: v2 / v, = 20 comb = 98% = 75% m = 90% trap = 100% 3.5 bar (abs) 50°C In the above (see also the figure given at the bottom of the back page). VI: Volume...
1. (30P) A twenty-cylinder MTU 4 STROKE 20V 4000 M93 marine diesel engine is designed to develop 3490 kW brake power at 1800 rpm. The bore is 170mm and stroke length is 210 mm for each cylinder and bsfc is 205 g/kWh. The calorific value of the petrol is 42 800kJ/kg. The inlet air manifold conditions are 80 kPa and 313 K. and The engine has a volumetric efficiency of 0.82. Calculate: a) Displacement (litre) b) Bmep (kPa) c) Fuel...
2. A 4.8 L, SI, four-stroke, V-8 stationary engine operates at 2000 RPM using gasoline with air/fuel ratio of 14.7. The engine has a volumetric efficiency of 90%, with a bore (B) and stroke (S) related as B:S=1.1:1. You can assume the density of fresh air is 1.16 kg/mº. Please calculate: (30 Points) a) Displacement of each cylinder, and length of stroke; b) Average velocity of piston; (This is a very simple question. You need find the distance piston moved...
3. A six cylinder, four-stroke cycle SI engine with multipoint fuel injection has a displacement of 2.4 liters (0.0024 m). The engine operates on a hydrocarbon fuel with H/C = 1.9 and MW =105 kg/kmol, at an equivalence ratio of 1.05. Each cylinder has one fuel injector fired once per cycle. The flow rate for the injector when continuously open is 0.003 kg/s. Consider the wide-open throttle, peak power operating point where the design volumetric efficiency is 90% and the...
1. A 12-cylinder, 4-stroke automobile engine is being designed. What type of cylinder arrangement would you recommend? (a) In-Line (b) V-Type (c) W-Type (d) Rotary. 2. The expression "cylinder cut-out" means : (a) Half of cylinder volumes is used. (b) Half of cylinder numbers is used. (c) Half of cylinder masses is used. (d) None of the above. 3. Adding lubrication oil to the inlet fuel- air mixture in 2-st engines will increase: (a) HC emissions. (b) CO emissions (c)...
Only parts (e) and (f) is required
Thanks.
2. An 8 cylinder 5.6L (total displacement) 4-stroke diesel engine has a compression ratio of 19.3 and a cutoff ratio of 1.4. The temperature and pressure at the beginning of the compression stroke is 27°C and 100 kPa. The maximum pressure in the cycle is 7400 kPa. Assume variable properties (Table A-17). a. Draw the P-v diagram b. Determine the maximum temperature during the cycle c. Determine the amount of heat added...
A 4-stroke 3 litre V6 spark ignition petrol engine has a maximum power output of 100kW at 5500rev/min, and a maximum torque of 236Nm at 3000rev/min. The minimum sfc is 0.090 kg/MJ at 3000 rpm, and the air flow rate is 0.068m²/s. The compression ratio is 8.9:1 and the mechanical efficiency is 90%. The engine was tested under ambient conditions of 20°C and 1 bar. Take the calorific value of fuel to be 44MJ/kg. (a) Determine the power output at...
2. The following information is known for a turbocharged 4-stroke Diesel engine, when running at a certain operating point onboard a vessel: (Geometric) compression ratio: Volumetric ratio: Combustion efficiency Heat input efficiency: Mechanical efficiency Entrapped air efficiency: Intake manifold pressure: Intake manifold temperature: v2 / v, = 20 comb = 98% = 75% m = 90% trap = 100% 3.5 bar (abs) 50°C In the above (see also the figure given at the bottom of the back page). VI: Volume...
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