03) An engine operates on air standard Otto cycle. Thepressure and temperature at the beginning of isentropiccompression are 120 kPa and 35°C. The peak pressure andtemperature are 4.8 MPa and 2500°C. Determine (a) the netcycle work in kJ/kg; (b) the cycle efficiency. (Ans 713.5kJ/kg, 44.9%)

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Answered: 03) An engine operates on air standard…

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

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Problem 1.1MA

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An air standard Otto cycle at the start of the isentropic compression has P₁ = 100 kPa and T₁ = 27°C. The compression ratio is 10 and during the heat addition process 1000 kJ/kg are supplied. Using the cold air standard analysis method, the net work for this cycle is most nearly equal to: A. 960 kJ/kg B. 900 kJ/kg C. 602 kJ/kg D. 333 kJ/kg E. Cannot be determined with the given information
18. An air standard Dual cycle has a compression ratio of 16, and compression begins at 1 bar, 50°C. The maximum pressure is 70 bar. The heat transferred to air at constant pressure is equal to that at constant volume. Determine : (i) The cycle efficiency. Take : c, = 1.005 kJ/kg-K, c, = 0.718 kJ/kg-K. (ii) The mean effective pressure of the cycle. [Ans. (i) 66.5% ; (ii) 4.76 bar]
A compression ratio of 18:1 is utilized in the functioning of an air-standard dual cycle. The temperature is 298 degrees Kelvin, there is 1 bar of pressure, and the volume is 4 liters. The total amount of heat that is added is 6.3 kJ, of which only 30% is added while maintaining a constant volume and the remaining 60% is added while maintaining a constant pressure. What is the temperature after the constant pressure heat addition process in Kelvin?

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03) An engine operates on air standard Otto cycle. The pressure and temperature at the beginning of isentropic compression are 120 kPa and 35°C. The peak pressure and temperature are 4.8 MPa and 2500°C. Determine (a) the net cycle work in kJ/kg; (b) the cycle efficiency. (Ans 713.5 kJ/kg, 44.9%)