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: 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. Already corrected answers. a) Determine per cylinder the volume at state 1, in liters. v1= 0.585 L b) Determine per cylinder the air mass per cycle, in kg. m = 0.000679 kg c) Determine per cylinder the heat addition per cycle, in kJ. Qin = 0.942 KJ d) Determine per cylinder the magnitude of the heat rejection per cycle, in kJ. Qout =0.435 kJ e) Determine per cylinder the net work per cycle, in kJ. Wcycle = 0.507 kJ f) Determine per cylinder the thermal efficiency. n = 53.82% g) Determine per cylinder the mean effective pressure, in bar. mep = 9.6571 bar
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: 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. Already corrected answers. a) Determine per cylinder the volume at state 1, in liters. v1= 0.585 L b) Determine per cylinder the air mass per cycle, in kg. m = 0.000679 kg c) Determine per cylinder the heat addition per cycle, in kJ. Qin = 0.942 KJ d) Determine per cylinder the magnitude of the heat rejection per cycle, in kJ. Qout =0.435 kJ e) Determine per cylinder the net work per cycle, in kJ. Wcycle = 0.507 kJ f) Determine per cylinder the thermal efficiency. n = 53.82% g) Determine per cylinder the mean effective pressure, in bar. mep = 9.6571 bar
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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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:
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.
Already corrected answers.
a) Determine per cylinder the volume at state 1, in liters.
v1= 0.585 L
b) Determine per cylinder the air mass per cycle, in kg.
m = 0.000679 kg
m = 0.000679 kg
c) Determine per cylinder the heat addition per cycle, in kJ.
Qin = 0.942 KJ
Qin = 0.942 KJ
d) Determine per cylinder the magnitude of the heat rejection per cycle, in kJ.
Qout =0.435 kJ
e) Determine per cylinder the net work per cycle, in kJ.
Wcycle = 0.507 kJ
f) Determine per cylinder the thermal efficiency.
n = 53.82%
g) Determine per cylinder the mean effective pressure, in bar.
mep = 9.6571 bar
Please answer and show the solution of h and i.
Thank you!
Transcribed Image Text:Develop a full exergy accounting per cycle, in kJ. Let To = 300 K, po = 1 bar.
Exergy In
kJ
Disposition of the Exergy:
Exergy out:
Net Work
i
kJ
Heat Rejection
kJ
Exergy Destroyed
OkJ
Total Exergy
(out or destroyed)
i
kJ
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