File:ME 322 HW16.EES
2/25/2023 9:24:04 PM Page 1
EES Ver. 10.836: #2191: For use only by students and faculty in Mechanical Engineering, Univ. of Idaho, Moscow, Idaho
"Josh Planting"
"HW#16"
f$ = 'steam_iapws'
"4."
mdot=200 [kg/s]
"State 1"
P[1] = 40[kPa]
T[1] = T_sat(f$, P=P[1])
x[1] = 0 "saturated liquid"
v[1] = Volume(f$,T=T[1], x=x[1])
h[1] = Enthalpy(f$,T=T[1], x=x[1])
"State 2"
P[2] = 10[MPa]*convert(MPa,kPa)
T[2] = T[1]
x[2] = Quality(f$, T=T[2], P=P[2])
v[2] = Volume(f$, T=T[2], P=P[2])
h[2] = Enthalpy(f$, T=T[2], P=P[2])
"State 3"
P[3] = P[2]
T[3] = 700[C]
x[3] = Quality(f$, T=T[3], P=P[3])
v[3] = Volume(f$, T=T[3], P=P[3])
h[3] = Enthalpy(f$, T=T[3], P=P[3])
"State 4"
"Returns to state 1"
"5."
"(a) feedpump power, Wdot=mdot(h1-h2)"
WdotFP=mdot*(h[1]-h[2])
"(b) rate of heat addition in the boiler, Qdot=mdot(h3-h2)"
QdotB=mdot*(h[3]-h[2])
"(c) turbine power, Wdot=mdot(h3-h4)"
WdotT=mdot*(h[3]-h[1])
"(d) rate of heat rejection from the condensor, Qdot=mdot(h3-h4)"
QdotC=mdot*(h[3]-h[1])
SOLUTION
Unit Settings: SI C kPa kJ mass deg
f$ = 'steam_iapws'
QdotC = 710474 [kJ/s]
mdot = 200 [kg/s]
WdotFP = -1603 [kJ/s]
No unit problems were detected.
Arrays Table: Main
Pi
1
2
3
Ti
vi
[kPa]
[C]
[m3/kg]
40
10000
10000
75.86
75.86
700
0.001026
0.001022
0.0436
xi
hi
[kJ/kg]
0
-100
100
317.6
325.6
3870
QdotB = 708871 [kJ/s]
WdotT = 710474 [kJ/s]
File:ME 322 HW16.EES
2/25/2023 9:24:05 PM Page 2
EES Ver. 10.836: #2191: For use only by students and faculty in Mechanical Engineering, Univ. of Idaho, Moscow, Idaho
SteamIAPWS
106
105
state 2
P [kPa]
104
state 3
250°C
700°C
103
102
10
1
100°C
state 1
50°C
0.05
100
5x10-4
10-2
10-1
v [m3/kg]
100
0.1
0.2
0.5
101
5x101