1) A four-stroke diesel engine has a piston diameter of 16.5 cm and a stroke of...

1) A four-stroke diesel engine has a piston diameter of 16.5 cm and a stroke of 27 cm. The compression ratio is 14.3, the cut-off 4.23% of the stroke and the mean effective pressure 4.12 bar. The engine speed is 264 rev/min and the fuel consumption is 1.076 kg of oil per hour, having a calorific value of 39150 kJ/kg. Calculate the relative efficiency of the engine 2). A diesel engine has a brake thermal efficiency of 30%. If the calorific value of fuel used in 10000 kcal kg, calculate the brake specific fuel consumption

Expert Solution

samet mamat answered 2 years ago

A 4 cylinder 4 stroke 2.3 L diesel engine with bore = 12.4 cm and stroke...

A 4 cylinder 4 stroke 2.3 L diesel engine with bore = 12.4 cm and stroke =11 cm. the crank radius is 6.2 cm and with a connecting rod length 15 cm. the compression ratio of the engine is 20 and the combustion efficiency is 97.3 %. If the average speed of the car over the running life of the engine is 56 km/h and the total traveled distance of the engine is 250000 km. note: use the engine speed...

A test was conducted on a 4-stroke four cylinder engine having 6.9 cm diameter and 8.9...

A test was conducted on a 4-stroke four cylinder engine having 6.9 cm diameter and 8.9 cm stroke. The fuel supply to the engine is 0.065 kg/min. The B.P measurements are given below with constant engine speed of 300 rpm: With all cylinder firing = 16.9 kW Cut off at 1st cylinder = 8.46 kW Cut off at 2nd cylinder = 8.56 kW Cut off at 3rd cylinder = 8.6 kW Cut off at 1st cylinder = 8.46 kW If...

A hand-driven tire pump has a 2.00 cm diameter piston and a maximum stroke of 32.0...

A hand-driven tire pump has a 2.00 cm diameter piston and a maximum stroke of 32.0 cm. (a) How much work do you do in one stroke if the average gauge pressure is 2.40 ✕ 105 N/m2 (about 35 psi)? (You may consider this an isothermal process.) J (b) What average force do you exert on the piston, neglecting friction and gravity? N

1. One hydraulic press has a 2.0 cm diameter piston and another piston has a 8.0...

1. One hydraulic press has a 2.0 cm diameter piston and another piston has a 8.0 cm diameter. What force must be applied to the smallest piston to balance a force of 1600 N to the largest piston? a. 6.25 N b. 23 N c. 400N d. none of the above 2. A barrel contains an oil layer of 0.120 m over 0.250 m of water. The oil density is 600 kg / m³. The gauge pressure at the oil-water...

A two-cylinder, four-stroke gas engine has a bore of 380 mm and a stroke of 585...

A two-cylinder, four-stroke gas engine has a bore of 380 mm and a stroke of 585 mm. At 240 rev/min the torque developed is 11.86 kNm. If the engine is supplied with a mixture of gas and air in the proportion of 1 to 7 by volume. The estimated volumetric efficiency is 85% and the Qnet,p of the gas is 38.6 MJ/m3. Calculate the brake thermal efficiency of the engine.

For a marine diesel engine application, a fluid-film journal bearing has a shaft diameter of 32...

For a marine diesel engine application, a fluid-film journal bearing has a shaft diameter of 32 mm and the length of the bearing is 24 mm. The bearing uses SAE grade 20 oil as lubricant and operates under a radial load. The inlet and outlet temperatures of oil are 50oC and 110oC respectively. It is assumed that because of the shearing action there is a uniformly distributed energy release in the lubricant that heats the lubricant film. During run-in operation,...

A manufacturer produces piston rings for an automobile engine. It is known that the ring diameter...

A manufacturer produces piston rings for an automobile engine. It is known that the ring diameter is normally distributed with σ = 0.001 millimeters. When a random sample of 16 rings is collected, the sample mean of the rings’ diameters is of x- = 74.036 millimeters. a.) In order to find a confidence interval for the true mean piston ring diameter, which distribution table would you use? b.) Find the lower bound of a 95% confidence interval for the mean...

A manufacturer produces piston rings for an automobile engine. It is known that ring diameter is...

A manufacturer produces piston rings for an automobile engine. It is known that ring diameter is Normally Distributed with ? = 0.001 ??. A random sample of 9 rings has a mean diameter of ? = 74.036 ?? a. What is a 95% ?????????? ???????? for the true mean diameter of the piston rings. Use the given ? = 0.001 ??. b. Interpret the ?????????? ???????? constructed in part (a) c. For mathematical purposes, assume for a moment that the...

During the power stroke in a four-stroke automobile engine, the pis-ton is forced down as the...

During the power stroke in a four-stroke automobile engine, the pis-ton is forced down as the mixture of combustion products and air undergoes an adiabatic expansion. Assume (1) the engine is running at 2500 cycles/min; (2) the pressure immediately before the expansion is 20.0 atm; (3) the volumes of the mixture immediately before and after the expansion are 50.0 cm3and 400 cm3, respectively ; (4) the time interval for expansion is one-fourth that of the total cycle; and (5) the...

A single-cylinder, four stroke research engine operates on Otto cycle. The specification of the engine is...

A single-cylinder, four stroke research engine operates on Otto cycle. The specification of the engine is shown as below:- Displacement volume of the cylinder = 540 cm3 Clearance volume of the cylinder = 60 cm3 Minimum temperature = 200°C Minimum pressure = 200 kPa Net work output = 1000 kJ/kg Sketch the process on a P-V diagram and by using constant specific heat at room temperature, determine: i) the temperature and pressure at each process, ii) the thermal efficiency of...

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