A test on a single-cylinder, four-stroke cycle gasoline engine yielded the following data: Torque = 950 N - m Indicated mean effective pressure = 759 kPa, Bore = 28 cm, Stroke = kg 30.5 cm, Speed = 300 rpm, Fuel consumption = 10.9 , and Heating value of the fuel = 41,900 Determine the Mechanical efficiency - - 3.73 % 81.49 % . - 79.52 % --77.79%

A test on a single-cylinder, four-stroke cycle gasoline engine yielded the following data: Torque = 950 N - m Indicated mean effective pressure = 759 kPa, Bore = 28 cm, Stroke = kg 30.5 cm, Speed = 300 rpm, Fuel consumption = 10.9 , and Heating value of the fuel = 41,900 Determine the Mechanical efficiency - - 3.73 % 81.49 % . - 79.52 % --77.79%

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

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I only need help with parts f to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
I only need help with parts d to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
Read carefully. Please solve ellaborately and include the untis in every step, and write your solutions clearly and readable if your solution is in written form, Your work will be appreaciated much. Thank You! The following data were obtained during performance test with a simple open cycle gas turbine engine: compressor inlet temperature, 520*R; compressor isentropic discharge temperature, 672"R; actual compressor discharge temperature, 691"R; turbine inlet temperature, 1500 R; turbine isentropic discharge temperature, 1184"R; and turbine actual discharge temperature, 1216°R. For these conditions calculate the thermal efficiency in percent.
Determine the diameter of a fuel orifice for a 4-stroke engine working on diesel cycle developing 18 kw per cylinder at 2000 rpm, using 0.27 kg/kw.h. of fuel of 30° API. The duration of the crank injection is 30° of crank travel. The fuel injection pressure is 125 bar and combustion chamber pressure is 35 bar. Take velocitycoefficient = 0.9 and Pr=141.5/(131.5 + API)
4. The following data were obtained during a test on a diesel engine operating at 2800 rev/min: =132 Nm Dynamometer torque measurement Fuel consumption Intake air flow rate =12 kg/h =168 kg/h Calorific value of fuel =44 400 kJ/kg Engine cooling water flow rate =15.4 kg/min =48°C Engine cooling water temperature rise =8.7 kg/min Exhaust calorimeter cooling water flow rate Exhaust calorimeter cooling water temperature rise Exhaust gas temperature at exit from calorimeter =64°C = 85°C Specific heat of exhaust gas =1.1 kJ/kgK laboratory air temperature = 25°C Draw up percentage-based energy balance for the engine using the laboratory temperature as the datum.
At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume per cylinder at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle. Correct Answers for a, b, and c. v1= 0.585 L m = 0.000679 kg Qin = 0.942 KJPlease shows correct solutions. Thank you!
Provide a complete and logical solution for the problem. If linear interpolation is required in the problem, tabulated values is considered as a solution. Also, provide T-S or P-V diagrams for each problem. An ideal Otto engine, operating on the hot-air standard with k=1.34, has a compression ratio of 5. At the beginning of compression, the volume is 6 ft3, the pressure is 13.75 psia and the temperature is 100°F. During the constant-volume heating, 340 BTU are added per cycle. Find the following: a. Percent clearance b. Temperature after heat addition c. Pressure after heat addition d. Efficiency
2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 MJ/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 1.0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be 110% in excess of that required for theoretically correct combustion. (i) Estimate the volumetric composition of dry exhaust gas (ii) Determine the bore and stroke of the engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m³. Oxygen in air is 23% by mass and 21% by volume.
I only need help with filling in the answers for parts h and i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency in %.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar (See image below).i) Devise and evaluate the exergetic efficiency for the cycle. part h
I only need help with parts f to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency in %.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
I only need help with parts g to i. At the beginning of the compression process of an air standard Otto cycle, p1 = 1 bar, T1 = 300 K. The maximum temperature in the cycle is 2250 K and the compression ratio is 9.8. The engine has 4 cylinders and an engine displacement of Vd = 2.1 L. Determine per cylinder: a) the volume at state 1.b) the air mass per cycle.c) the heat addition per cycle, in kJ.d) the heat rejection per cycle, in kJ.e) the net work per cycle, in kJ.f) the thermal efficiency in %.g) the mean effective pressure, in bar.h) Develop a full exergy accounting per cycle, in kJ. Let T0 = 300 K, p0 = 1 bar.i) Devise and evaluate the exergetic efficiency for the cycle.
The following data is given for a four-stroke diesel engine: Cylinder bore = 250 mm, Length of stroke = 300 mm, Speed 600 rpm, Indicated mean effective pressure = 0.6 Mpa, Mechanical efficiency = 80% Maximum gas pressure = 4 Mpa, Fuel consumption = 0.25 kg per BP per h Higher calorific value of fuel = 44 000 kJ/kg, Assume that 5% of the total heat developed in the cylinder is transmitted by the piston. The piston is made grey cast iron FG 200 (Sut = 200 N/mm² and k = 46.6 W/m/°C) and the factor of safety is 5. The temperature difference between the centre and the edge of the piston head is 220°C. (i) Calculate the thickness of piston head by strength consideration. (ii) Calculate the thickness of piston head by thermal consideration. (iii) Which criterion decides the thickness of piston head? (iv) State whether the ribs are required. (v) If so, calculate the number and thickness of piston ribs. (vi) State whether a cup is required in the top of the piston head. (vii) If so, calculate…