Calculate the diameter of the fuel orifice of a four stroke engine which develops 25 KW...
Calculate the diameter of the fuel orifice of a four stroke engine which develops 25 KW per cylinder at 2500 rpm. The specific fuel consumption is 0.3 kg/Kwh. The fuel is injected at a pressure of 150 bar. The pressure in the combustion chamber is 40 bar. Coefficient of velocity is 0.875 and specific gravity is 0.85. The duration of fuel injection is 2 X 10^-3 s.
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Calculate the diameter of the fuel orifice of a four stroke
engine which develops 25 KW...
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...
An oil engine develops 300 kW and the specific fuel consumption is 0.21 kg/kWh. The exhaust...
An oil engine develops 300 kW and the specific fuel consumption is 0.21 kg/kWh. The exhaust from the engine is used in a tubular water heater, flowing through 25 mm diameter tubes, entering with a velocity of 12 m/s, at 340 °C and leaving at 90 °C. The water enters the heater at 10 °C and leaves at 90 °C, flowing in counter-flow to the hot gases. The air-fuel ratio of the engine is 20, and the exhaust pressure is...
Problem 4: A 12-cylinder, two-stroke CI diesel engine produces 2440 kW of brake power at 550...
Problem 4: A 12-cylinder, two-stroke CI diesel engine produces 2440 kW of brake power at 550 rpm using equivalence ratio o=1. The engine has a bore of 24 cm, stroke of 32 cm, volumetric efficiency of 100%. Calculate the mass flow rate of fuel into engine and brake specific fuel consumption.
(23%) A four-cylinder petrol engine with a bore of 63 mm and a stroke of 76 mm was tested at full...
Looking for an answer to 13.9. Which uses information from
13.8
(23%) A four-cylinder petrol engine with a bore of 63 mm and a stroke of 76 mm was tested at full throttle at 3000 rev/min over a range of mixture strengths. The following readings were taken during the test: 13.8 4 162 165.5 169 170 169 162 159 Brake load/(N) Fuel consumption/(ml/s) 2.08 2.04 2.17 2.50 2.84 3.40 3.56 max poucr bmep s highest Problems he relative density of...
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore...
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore 125 mm stroke when it develops a torque of 490 Nm. Problem = 7. Find the brake thermal efficiency of an engine which consumes 7 kg of fuel in 20 minutes and develops a brake power of 65kW. The fuel has heating value of 42000 kJ/kg. Problem # 8. Find the mean piston speed of a diesel engine running at 1500 rpm. The engine...
mean effective pressure is 8.5 Pecific fuel consumption is 3009 g/kWh, and the indicated A A...
mean effective pressure is 8.5 Pecific fuel consumption is 3009 g/kWh, and the indicated A A six-cylinder, four-stroke gasoline engine having a bore of 90 mm and stroke of 100 mm has a compression ratio 8. On test, it develops a torque of 240 Nm when it was running at 2500 rpm. Given that the ratio of the indicated thermal efficiency to the theoretical air standard (a) The calorific (heat) value of the fuel Qv, (2 marks) (b) The indicated...
2. Analyze an Audi 3.0-liter TDI V6 Biturbo diesel engine using an air-standard Diesel cycle that...
2. Analyze an Audi 3.0-liter TDI V6 Biturbo diesel engine using an air-standard Diesel cycle that addresses the "real" effects of non-isentropic compression/expansion, air-fuel ratio, fuel heating value, incomplete combustion, exhaust residual, and heat loss. The engine is four-stroke, has six cylinders with a compression ratio of 16.0, and develops maximum power at 4250 rpm. Assume the following: the diesel fuel heating value is Quv 42,600 kJ/kg, the air-to-fuel ratio (AF) at maximum power is 25, and the combustion efficiency...
The answer is: 26.3% and 56.48 hp. Problem 12: An actual four-stroke SI engine has a...
The answer is: 26.3% and 56.48 hp.
Problem 12: An actual four-stroke SI engine has a total cylinder volume of 0.0015 m3 and a compression ratio of 9:1. The engine runs at 3000 rpm. At the start of the compression stroke the air is at 303 K and a pressure of 100 kPa. The ratio of the actual thermal efficiency of the engine to the air-standard cycle efficiency is 45%. The air to fuel ratio is 13:1. The internal energy...
INTERNAL COMBUSTION ENGINES Practice Problems ME 436 A 3 cylinder, 2.7 liter SI engine operates on...
INTERNAL COMBUSTION ENGINES Practice Problems ME 436 A 3 cylinder, 2.7 liter SI engine operates on a 4 stroke cycle at 3300 RPM with a compression ratio of 8.6:1. At the start of the compression stroke, the temperature is 47°C and the pressure is 82kPa. Assume 3% residual gases. The mechanical efficiency is 81%, combustion efficiency is 96%, and the air-fuel ratio is 16.3, and the fuel heating value is 43,000 kJ/kg. The combustion process starts at TDC and is...
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...
An oil engine develops 300 kW and the specific fuel consumption is 0.21 kg/kWh. The exhaust from the engine is used in a tubular water heater, flowing through 25 mm diameter tubes, entering with a velocity of 12 m/s, at 340 °C and leaving at 90 °C. The water enters the heater at 10 °C and leaves at 90 °C, flowing in counter-flow to the hot gases. The air-fuel ratio of the engine is 20, and the exhaust pressure is...
Problem 4: A 12-cylinder, two-stroke CI diesel engine produces 2440 kW of brake power at 550 rpm using equivalence ratio o=1. The engine has a bore of 24 cm, stroke of 32 cm, volumetric efficiency of 100%. Calculate the mass flow rate of fuel into engine and brake specific fuel consumption.
Looking for an answer to 13.9. Which uses information from
13.8
(23%) A four-cylinder petrol engine with a bore of 63 mm and a stroke of 76 mm was tested at full throttle at 3000 rev/min over a range of mixture strengths. The following readings were taken during the test: 13.8 4 162 165.5 169 170 169 162 159 Brake load/(N) Fuel consumption/(ml/s) 2.08 2.04 2.17 2.50 2.84 3.40 3.56 max poucr bmep s highest Problems he relative density of...
Problem 6. Compute the brake mean effective pressure of a four-cylinder, two-stroke engine, 100 mm bore 125 mm stroke when it develops a torque of 490 Nm. Problem = 7. Find the brake thermal efficiency of an engine which consumes 7 kg of fuel in 20 minutes and develops a brake power of 65kW. The fuel has heating value of 42000 kJ/kg. Problem # 8. Find the mean piston speed of a diesel engine running at 1500 rpm. The engine...
mean effective pressure is 8.5 Pecific fuel consumption is 3009 g/kWh, and the indicated A A six-cylinder, four-stroke gasoline engine having a bore of 90 mm and stroke of 100 mm has a compression ratio 8. On test, it develops a torque of 240 Nm when it was running at 2500 rpm. Given that the ratio of the indicated thermal efficiency to the theoretical air standard (a) The calorific (heat) value of the fuel Qv, (2 marks) (b) The indicated...
2. Analyze an Audi 3.0-liter TDI V6 Biturbo diesel engine using an air-standard Diesel cycle that addresses the "real" effects of non-isentropic compression/expansion, air-fuel ratio, fuel heating value, incomplete combustion, exhaust residual, and heat loss. The engine is four-stroke, has six cylinders with a compression ratio of 16.0, and develops maximum power at 4250 rpm. Assume the following: the diesel fuel heating value is Quv 42,600 kJ/kg, the air-to-fuel ratio (AF) at maximum power is 25, and the combustion efficiency...
The answer is: 26.3% and 56.48 hp.
Problem 12: An actual four-stroke SI engine has a total cylinder volume of 0.0015 m3 and a compression ratio of 9:1. The engine runs at 3000 rpm. At the start of the compression stroke the air is at 303 K and a pressure of 100 kPa. The ratio of the actual thermal efficiency of the engine to the air-standard cycle efficiency is 45%. The air to fuel ratio is 13:1. The internal energy...
INTERNAL COMBUSTION ENGINES Practice Problems ME 436 A 3 cylinder, 2.7 liter SI engine operates on a 4 stroke cycle at 3300 RPM with a compression ratio of 8.6:1. At the start of the compression stroke, the temperature is 47°C and the pressure is 82kPa. Assume 3% residual gases. The mechanical efficiency is 81%, combustion efficiency is 96%, and the air-fuel ratio is 16.3, and the fuel heating value is 43,000 kJ/kg. The combustion process starts at TDC and is...
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...
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