Find the unknown state properties in the table below ) Find the heat transfer and work during the process from 2 to 3, in [kJ] Find the thermal efficiency of the cycle a)

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Consider an air-standard Diesel cycle with a compression ratio of r = 12 and a
cutoff ratio of r. = 2. At the beginning of the compression stroke, the air is at a pressure of p, = 100 kPa
and a temperature of T1 = 300 K. Some heat transfers and works are known and are provided below.
Conducting an analysis under air-standard assumptions with Rair = 0.287- and modelling the
kg-K
engine as containing 2 kg of air:
a)
b)
c)
Find the unknown state properties in the table below
) Find the heat transfer and work during the process from 2 to 3, in [kJ]
Find the thermal efficiency of the cycle
State
T[K]
P [kPa]
v [m3/kg]
1
300
100
780
3
4
869
290
Known work and heat transfer processes:
W12 = -362 kJ
W34 = 611.3 k)
Q41 = -434.9 kJ
Transcribed Image Text:Consider an air-standard Diesel cycle with a compression ratio of r = 12 and a cutoff ratio of r. = 2. At the beginning of the compression stroke, the air is at a pressure of p, = 100 kPa and a temperature of T1 = 300 K. Some heat transfers and works are known and are provided below. Conducting an analysis under air-standard assumptions with Rair = 0.287- and modelling the kg-K engine as containing 2 kg of air: a) b) c) Find the unknown state properties in the table below ) Find the heat transfer and work during the process from 2 to 3, in [kJ] Find the thermal efficiency of the cycle State T[K] P [kPa] v [m3/kg] 1 300 100 780 3 4 869 290 Known work and heat transfer processes: W12 = -362 kJ W34 = 611.3 k) Q41 = -434.9 kJ
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