File:5_Cycle.EES
10/19/2014 8:19:45 AM Page 1
EES Ver. 9.701: #3770: For use only by students and faculty Mechanical Engineering Dokuz Eylül University, TURKEY
{!INPUTS}
T[1] = 300 [K]
P[1] = 100 [kPa]
P[2] = 800 [kPa]
T[3] = 1800 [K]
P[4] = P[1]
"State 1"
h[1] = enthalpy(Air, T=T[1])
s[1] = entropy(Air, T=T[1], P=P[1])
v[1] = volume(Air, T=T[1], P=P[1])
"State 2"
s[2] = s[1]
T[2] = temperature(Air, P=P[2], s=s[2])
u[2] = intenergy(Air, T=T[2])
v[2] = volume(Air, T=T[2], P=P[2])
"State 3"
v[3] = v[2]
P[3] = pressure(Air, v= v[3], T=T[3])
u[3] = intenergy(Air, T=T[3])
s[3] = entropy(Air, T=T[3], v=v[3])
"State 4"
s[4] = s[3]
h[4] = enthalpy(Air, P= P[4], s=s[4])
T[4] = temperature(Air, P=P[4], s=s[4])
v[4] = volume(Air, P=P[4], s=s[4])
{! (a) wout}
q_in = u[3] - u[2]
q_out = h[4] - h[1]
w_out = q_in - q_out
File:5_Cycle.EES
10/19/2014 8:19:45 AM Page 2
EES Ver. 9.701: #3770: For use only by students and faculty Mechanical Engineering Dokuz Eylül University, TURKEY
{! (b) efficiency}
eta = w_out/q_in
Arrays Table: Main
si
Ti
hi
vi
ui
[kJ/kg-K]
[K]
[kJ/kg]
[m3/kg]
[kJ/kg]
100
800
2666
100
5.705
5.705
6.728
6.728
300
540
1800
805.4
300.4
0.8611
0.1938
0.1938
2.312
828.2
389.7
1487
Air
3000
2500
P = 2666 kPa
P = 800 kPa
2000
3
T [K]
1
2
3
4
Pi
[kPa]
P = 100 kPa
1500
1000
4
2
500
1
0
4.5
5.0
5.5
6.0
6.5
s [kJ/kg-K]
7.0
7.5
8.0
8.5
File:5_Cycle.EES
10/19/2014 8:19:45 AM Page 3
EES Ver. 9.701: #3770: For use only by students and faculty Mechanical Engineering Dokuz Eylül University, TURKEY
Air
104
1x104
3
103
1x103
P [kPa]
2
102
1x102
4
1
T = 1800 K
T = 300 K
101
10-2
10-1
100
v [m3/kg]
101
1x101
102
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{!INPUTS} T[1] = 300 [K] P[1] = 100 [kPa] P[2] = 800 [kPa] T[3] = 1800