1. Why ICE is always open cycle while the ECE can be open or closed cycle? 2. Compare between the SI and Cl engines with respect to: (a) Ignition process; (b) Compression ratio; (c) Efficiency; (d) Engine speed; and (e) Weight. 3. What happen during the compression, and expansion of the four-struke Cl enginen? 4. Explain why the bmep is lower at the maximum rated power for a given engine than the bmep at the masimum brake torque. 5. The mean piston speed U,is greater for: (a) over square engine (b) under square engine (c) square engine 6. Two spark ignition petrol engines having the same swept volume and compression ratio are running at the same speed with wide open throttles. One engine operates on the two-stroke cycle and the other on the four-stroke cycle. State with reasons: () which has the greater power output? (ii) which has the higher efficiency?

1. Why ICE is always open cycle while the ECE can be open or closed cycle? 2. Compare between the SI and Cl engines with respect to: (a) Ignition process; (b) Compression ratio; (c) Efficiency; (d) Engine speed; and (e) Weight. 3. What happen during the compression, and expansion of the four-struke Cl enginen? 4. Explain why the bmep is lower at the maximum rated power for a given engine than the bmep at the masimum brake torque. 5. The mean piston speed U,is greater for: (a) over square engine (b) under square engine (c) square engine 6. Two spark ignition petrol engines having the same swept volume and compression ratio are running at the same speed with wide open throttles. One engine operates on the two-stroke cycle and the other on the four-stroke cycle. State with reasons: () which has the greater power output? (ii) which has the higher efficiency?

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

See similar textbooks

Similar questions

A rankine cycle has the following operating condition; Steam pressure, 2.5 mpa. Steam temperature, 280°c. Exhaust pressure, 0.26mpa. Indicate steam rate, 5.45 kg/kwh. Mechanical efficiency, 90%. For ideal cycle and engine, calculate (a) the thermal efficiency, (b) the engine steam rate, (c) the steam flow rate in kg/h for 1 Mw generator output at 94% efficiency.
Provide complete solution and detailed diagram. A diesel cycle has an intake condition of 100kpa and 30oC and maximum temperature of 1200oC. What is the cycle efficiency if compression ratio is 10: 1. A. 50.34% B. 59.34% C. 45.34% D. 53.79%
Solve the problem and Draw the T-s and its complete Cycle diagram with labels, Write the GIVEN information, REQUIRED variables, and EQUATIONS used and provide SUMMARY of Answers at the end of the solution. Find and compare the efficiency of the simple ideal Rankine cycle engine operating between20 and 100 deg. C for working fluids of water and Refrigerant 12. Compare the results to the Carnotefficiency.
1. Compare and evaluate the actual and ideal thermal efficiencies and back work ratio 2. Construct efficiency vs. pressure ratio plot, showing the region of typical values of gasturbine operating pressure ratios.3. What is the main limitation associated with turbine in a gas turbine power cycle.
2. A Spark-Ignition Engine has 4 cylinders in-line, a compression ratio of 8.7 and a displacement of 2.6Liters and with S = 1.05B. Fuel used is C 8 H 18 with an equivalence ratio of 1.05 with combustionefficiency of 100%. The heating value of the fuel is 44,300 kJ/kg. While operating at 3200 rpm,mechanical efficiency is 86 % and indicated engine efficiency is 96%. Conditions at the start ofcompression stroke are 100 kPaa and 60 o C. It can be assumed that there is a 3 % exhaust residual leftfrom the previous cycle.Determine: a) P and T at cycle state points, b) mass of air per cylinder, c) mass of fuel per cylinder, d)brake thermal efficiency, e) torque produced, f) fmep, g) isfc, h) volumetric efficiency, i) Specific Power
We wish to model a gasoline engine for an automotive application with the ideal Otto cycle. The compression ratio is 10. The heat added is 2965 kJ/kg. For a 4 stroke engine, what is the engine displacement in liters to produce 500 hp at a rotational speed of 5000 rpm. The inlet pressure is 100 kPa and the inlet temperature is 27 deg C Group of answer choices 4.3 L 5.0 L 5.7 L 2.2 L
Combined Rankine Cycle Show the details of your solutions with Schematic and TS diagrams Performance between: Condition 1 Required PH = 17 MPa, 10000C Thermal Efficiency ? PR = 8 MPa, 8000C PReg = 4 MPa PL = 0.008 MPa Condition 2 Required PH = 17 MPa, 10000C Thermal Efficiency ? PReg = 8 MPa PR = 4 MPa, 8000C PL = 0.008 MPa
Essay type: (25+ wordcount) Consider the ideal Otto, Diesel, Ericson, Stirling, and Carnot cycle operating between the same temperature limits. How would you compare the thermal efficiencies of these five cycles?
Sketch the P-V diagram of the Internal Combustion Engine showing the ideal cycles of a DieselEngine. Label the events.
Provide complete solution and detailed diagram. A diesel cycle has a compression ratio of 8 and cut-off ratio of 3.5. The cycle efficiency is: A. 40.59% B. 34.23% C. 56.34% D. 65.34%
Pls answer 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.
Write legibly, provide manual step by step solution, and diagram for below given problem. A superheat steam Rankine cycle has turbine inlet conditions of 17.5 Mpa and 530 C expands in a turbine to 0.007Mpa. The turbine and pumps polytropic efficiencies are 0.9 and 0.7 respectively, pressure losses between pump and turbine are 1.5MPa. What should be the pump work in KJ/kg? A. 17.3 C. 37.3 B. 27.3 D. 43.4