As shown in (a) P-v diagram and (b) T-s diagram, an ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is P1 = 95 kPa and T1 = 20°C. If the maximum temperature in the cycle is not to exceed T3 = 2200 K, determine (be noted with the formula below): %3! %3D %3D
As shown in (a) P-v diagram and (b) T-s diagram, an ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is P1 = 95 kPa and T1 = 20°C. If the maximum temperature in the cycle is not to exceed T3 = 2200 K, determine (be noted with the formula below): %3! %3D %3D
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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Transcribed Image Text:As shown in (a) P-v diagram and (b) T-s diagram, an ideal diesel engine has a compression ratio
of 20 and uses air as the working fluid. The state of air at the beginning of the compression
process is P1 = 95 kPa and T1 = 20°C. If the maximum temperature in the cycle is not to exceed
T3 = 2200 K, determine (be noted with the formula below):
9in
Fin
P = constant
Isentropic
Yout
Isentropic
V = constant
(a) P-v diagram
(b) T-s diagram
(a) the temperature T2 after the compression (K).
(b) the temperature T4 after the expansion (K). (hint: 3 = V2
V2 V4
V4
(c) the thermal efficiency of the cycle (%).
************
**********
O ideal gas equation of state:
Pv = RT, PV = mRT,
T2
P2V2
T1
k-1
2 ideal gas undergoing an isentropic process:
%3D
3 constant specific heats and gas constant:
kJ
= 1.005
kg · K'
kJ
Cy = 0.718-
kg · K'
kJ
R = 0.287
Cp =
k = 1.4,
kg · K
4 efficiency of diesel engine
T4 – T1
k(T3 – T2)
n = 1–
***
*******************************************
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