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(8 Marks) (b) A two-cylinder petrol engine has a swept volume of 2500 cm, and the...
A four-stroke petrol engine has a total swept volume of 2.44 litres distributed over 4 cylinders,...
A four-stroke petrol engine has a total swept volume of 2.44 litres distributed over 4 cylinders, each cylinder with a clearance volume of 0.092 litres. Assume the corresponding ideal thermodynamic cycle and the following start conditions to calculate the mass of air in a single cylinder. Assume dry air and ignore the mass of the fuel. •CV of air: 0.718 kJ/ (kg K). •Cp of air: 1.005 kJ/ (kg K). •Temperature at intake: 292 K. •pressure at intake: 0.935 bar....
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (Vmin) of the engine is 420 cm². At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: (a) Brake power (2 mark) (b) The brake mean effective pressure, (1 mark)...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (V min) of the engine is 420 cm? At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: a) Brake power (2 mark) b) The brake mean effective pressure, (1...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (V min) of the engine is 420 cm? At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: a) Brake power (2 mark) b) The brake mean effective pressure, (1...
A four-cylinder engine with 9.5-cm bore and an 8.75-cm stroke has 10% clearance. The engine rotates...
A four-cylinder engine with 9.5-cm bore and an 8.75-cm stroke has 10% clearance. The engine rotates at 5500 rpm. The conditions at the beginning of compression are 27°C and 98 kPa. The maximum cycle temperature is 2900°K. The engine may be assumed to operate on an air-standard Otto cycle. Draw the P-V and T-S diagram of the cycle and determine: a) Pressure and Temperature at the end of the expansion process, b) Cycle work, kJ c) Mean Effective Pressure, kPa...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (Vmin) of the engine is 420 cm3 . At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: a) Brake power b) The brake mean effective pressure c) Friction losses...
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...
An air-standard cycle is executed within a closed piston–cylinder system, and it consists of the following...
An air-standard cycle is
executed within a closed piston–cylinder system, and it consists of
the following three processes: 1–2 V = Constant heat addition from
100 kPa and 30°C to 850 kPa 2–3 Isothermal expansion until V3 =
8.5V2 3–1 P = Constant heat rejection to the initial state Assume
air has constant properties with cv = 0.718 kJ/kg·K, cp = 1.005
kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.4.
Required information An air-standard cycle is executed within a...
14. An I.C engine operating on Limited Pressure Cycle has a cylinder bore and stroke length...
14. An I.C engine operating on Limited Pressure Cycle has a cylinder bore and stroke length of 250 mm and 400 mm respectively. Its compression ratio and expansion ratio are 9 and 5 respectively. The initial pressure and temperature of the air are 1 bar and 30°C. The heat added at constant pressure is twice the heat rejected at constant volume. The compression and expansion follows the law pv 1.25 - constant. Determine: (Pressures and temperatures at all salient points....
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (Vmin) of the engine is 420 cmº. At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: (a) Brake power (b) The brake mean effective pressure, (c) Friction losses (d)...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (Vmin) of the engine is 420 cm². At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: (a) Brake power (2 mark) (b) The brake mean effective pressure, (1 mark)...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (V min) of the engine is 420 cm? At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: a) Brake power (2 mark) b) The brake mean effective pressure, (1...
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (V min) of the engine is 420 cm? At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: a) Brake power (2 mark) b) The brake mean effective pressure, (1...
A four-cylinder engine with 9.5-cm bore and an 8.75-cm stroke has 10% clearance. The engine rotates at 5500 rpm. The conditions at the beginning of compression are 27°C and 98 kPa. The maximum cycle temperature is 2900°K. The engine may be assumed to operate on an air-standard Otto cycle. Draw the P-V and T-S diagram of the cycle and determine: a) Pressure and Temperature at the end of the expansion process, b) Cycle work, kJ c) Mean Effective Pressure, kPa...
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...
An air-standard cycle is
executed within a closed piston–cylinder system, and it consists of
the following three processes: 1–2 V = Constant heat addition from
100 kPa and 30°C to 850 kPa 2–3 Isothermal expansion until V3 =
8.5V2 3–1 P = Constant heat rejection to the initial state Assume
air has constant properties with cv = 0.718 kJ/kg·K, cp = 1.005
kJ/kg·K, R = 0.287 kJ/kg·K, and k = 1.4.
Required information An air-standard cycle is executed within a...
14. An I.C engine operating on Limited Pressure Cycle has a cylinder bore and stroke length of 250 mm and 400 mm respectively. Its compression ratio and expansion ratio are 9 and 5 respectively. The initial pressure and temperature of the air are 1 bar and 30°C. The heat added at constant pressure is twice the heat rejected at constant volume. The compression and expansion follows the law pv 1.25 - constant. Determine: (Pressures and temperatures at all salient points....
A gasoline engine of 6 cylinders operates on the four-stroke cycle. The bore of each cylinder is 80 mm and the stroke is 100 mm. The indicator diagram shows an indicated mean effective pressure of 7.3 bars. The clearance volume (Vmin) of the engine is 420 cmº. At the speed of 4100 rpm, the fuel consumption is 19.8 kg/hr and the torque developed is 160 Nm. Calculate: (a) Brake power (b) The brake mean effective pressure, (c) Friction losses (d)...
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