Answered: Using the basic relations given below…

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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Question

Using the basic relations given below and detailing your method and assumptions,

Develop all the analytical relations required to:
1) Determine the temperatures and pressures at all stages of an ideal air-standard SI
Otto cycle analysis
2) Show that the thermal efficiency of any internal combustion engine can be
simplified as a ratio of temperature differences
3) Discuss the concept of Brake Specific Fuel Consumption (BSFC) and propose a rationale for the Figure 1 below (in other words, explain why the BSFC is decreasing
before increasing with engine speed)

rc = 10
460
re = 8
440
420
400
380
1000
2000
3000
4000
5000
Engine speed, N (RPM)
Figure 1: BSFC vs Speed
bsfc (gm/kW-hr)

Question 1
Using the basic relations given below and detailing your method and assumptions,
Tout = C, (T, –T,)
PV,
т,
PV" = constant (isentropic)
RT
RT,
P
W.
net,out
where w,
W.
net out
Nth
net,out = Tin - Iout
МЕР
where
Tin
W.
n = 2-
m,w
sfc :
m,W net
net
net

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