An Otto cycle is to be used to model an engine cycle. All assumptions of the ideal Otto cycle are to be applied except a polytropic process with n 1.3 will be used for the expansion process. The conditions at the beginning of compression are TI = 333 K, PI = 90 kPa and the compression ratio is 8. The energy input into the cycle during the constant volume process is 2000 kJ/kg. Assume constant specific heats. a) Find the temperature (K) and pressure (kPa) after compression b) Find the peak temperature of the cycle. (K) c) Find the temperature at the end of the expansion process. (K) d) Find the expansion work (kJ/kg) e) Find the net heat transfer for the cycle (kJ/kg)

An Otto cycle is to be used to model an engine cycle. All assumptions of the ideal Otto cycle are to be applied except a polytropic process with n 1.3 will be used for the expansion process. The conditions at the beginning of compression are TI = 333 K, PI = 90 kPa and the compression ratio is 8. The energy input into the cycle during the constant volume process is 2000 kJ/kg. Assume constant specific heats. a) Find the temperature (K) and pressure (kPa) after compression b) Find the peak temperature of the cycle. (K) c) Find the temperature at the end of the expansion process. (K) d) Find the expansion work (kJ/kg) e) Find the net heat transfer for the cycle (kJ/kg)

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 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.