File:ejercicio 8.5.ESS.EES 8/03/2024 10:49:43 p. m.
Page 1
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill
P[3]=8
s[3]=s[2]
x[3]=Quality(Water;s=s[3];P=P[3])
h_s[3]=Enthalpy(Water;x=x[3];s=s[3])
h[3]=h[2]-x[3]*(h[2]-h_s[3])
P[1]=8000
T[1]=480
h[1]=Enthalpy(Water;T=T[1];P=P[1])
s[1]=Entropy(Water;T=T[1];P=P[1])
P[2]=700
s[2]=s[1]
h[2]=Enthalpy(Water;s=s[2];P=P[2])
P[4]=8
x[4]=0
h[4]=Enthalpy(Water;x=x[4];P=P[4])
v[4]=Volume(Water;x=x[4];P=P[4])
P[5]=700
h[5]=h[4]+v[4]*(P[5]-P[4])
P[6]=700
x[6]=0
h[6]=Enthalpy(Water;x=x[6];P=P[6])
v[6]=Volume(Water;x=x[6];P=P[6])
P[7]=8000
h[7]=h[6]+v[6]*(P[7]-P[6])
y*h[2]+(1-y)*h[5]=h[6]
W_t=(h[1]-h[2])+(1-y)*(h[2]-h[3])
W_b=(h[7]-h[6])+(1-y)*(h[5]-h[4])
Q_in=h[1]-h[7]
n_eficiencia=(W_t-W_b)/Q_in
W_cycle=W_t-W_b
W_neto=100,000
m_[1]=(W_neto*3600)/W_cycle
SOLUTION
Unit Settings: [kJ]/[C]/[kPa]/[kg]/[degrees]
neficiencia = 0,3841 [%] Qin = 2643 [kW] W b = 8,644 [kW] W cycle = 1015 [kW]
W neto = 100 [kW] W t = 1024 [kW] y = 0,2036
10 potential unit problems were detected.
Arrays Table
hi Pi Ti si xi hs;i vi mi
[kJ/kg] [kpa] [°C] [(kJ/kg)K] [m 3/kg] [kg/s]
1 3349 8000 480 6,659 354,6
2 2742 700 6,659
3 2218 8 6,659 0,7946 2083
4 173,7 8 0 0,001008
5 174,4 700
6 697,3 700 0 0,001108
7 705,4 8000
File:Ejercicio 10.8.EES 8/03/2024 10:14:37 p. m. Page 1
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill
P[1]=7000
P[2]=P[1]
P[3]=P[2]
T[1]=500
T[2]=T[1]
T[3]=T[2]
h[1]=Enthalpy(Water;T=T[1];P=P[1])
h[2]=h[1]
h[3]=h[2]
s[1]=Entropy(Water;T=T[1];P=P[1])
s[2]=s[1]
s[3]=s[2]
P[4]=500
h[4]=h[3]
s[4]=s[3]
P[5]=500
s[5]=s[3]
x[5]=Quality(Water;s=s[5];P=P[5])
h[5]=Enthalpy(Water;x=x[5];s=s[5])
P[6]=5
T_sat[6]=T_sat(Water;P=P[6])
s[6]=s[5]
x[6]=Quality(Water;s=s[6];P=P[6])
h[6]=Enthalpy(Water;x=x[6];T=T_sat[6])
P[7]=500
x[7]=0
h[7]=Enthalpy(Water;x=x[7];P=P[7])
v[7]=Volume(Water;x=x[7];P=P[7])
P[8]=5,0
x[8]=0
h[8]=Enthalpy(Water;x=x[8];P=P[8])
v[8]=Volume(Water;x=x[8];P=P[8])
P[9]=7000
W_bomba[1]=v[8]*(P[9]-P[8])
h[9]=h[8]+W_bomba[1]
h[11]=h[9]
P[10]=7000
W_bomba[2]=v[7]*(P[10]-P[7])
h[10]=h[7]+W_bomba[2]
m[1]=15
Q_pmax=m[1]*(h[4]-h[7])
W_turbina=m[1]*(h[3]-h[6])
W_bombaentrada=m[1]*(W_bomba[1])
W_neto=(W_turbina-W_bombaentrada)
Q_entrada=m[1]*(h[1]-h[11])
File:Ejercicio 10.8.EES 8/03/2024 10:14:37 p. m. Page 2
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill
Q_p=0
p_u=(W_neto+Q_p)/Q_entrada
m[4]=(0,1)*(15)
m[5]=(0,7)*(15)
m[7]=m[4]+m[5]
Q_salida=(m[4]*h[4])+(m[5]*h[5])-(m[7]*h[7])
SOLUTION
Unit Settings: [kJ]/[C]/[kPa]/[kg]/[degrees]
pu = 0,4076 Qentrada = 48986 [Kw] Qp = 0 [Kw] Qpmax = 41553 [Kw]
Qsalida = 26186 [Kw] W bombaentrada = 105,5 [kW] W neto = 19967 [kW] W turbina = 20072 [kW]
2 potential unit problems were detected.
Arrays Table
hi mi Pi si Ti Tsat;i vi Wbomba;i xi
[kJ/kg] [kg/s] [kpa] [(kJ/kg)K] [°C] [°C] [m 3/kg] [kW]
1 3411 15 7000 6,798 500 7,032
2 3411 7000 6,798 500 7,101
3 3411 7000 6,798 500
4 3411 1,5 500 6,798
5 2738 10,5 500 6,798 0,9952
6 2072 5 6,798 32,88 0,7985
7 640,3 12 500 0,001093 0
8 137,7 5 0,001005 0
9 144,8 7000
10 647,4 7000
11 144,8
File:ejercicio 10.5.EES 8/03/2024 10:03:00 p. m. Page 1
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill
P[1]=10
T_sat[1]=T_sat(Water;P=P[1])
h[1]=Enthalpy(Water;T=T_sat[1];P=P[1])
v[1]=Volume(Water;T=T_sat[1];P=P[1])
P[3]=1200
T_sat[3]=T_sat(Water;P=P[3])
h[3]=Enthalpy(Water;T=T_sat[3];P=P[3])
v[3]=Volume(Water;T=T_sat[3];P=P[3])
s[3]=Entropy(Water;T=T_sat[3];P=P[3])
P[2]=1200
s[1]=Entropy(Water;T=T_sat[1];P=P[1])
s[1]=s[2]
W_bomba[1]=v[1]*(P[2]-P[1])
h[2]=h[1]+W_bomba[1]
P[4]=15000
s[4]=s[3]
W_bomba[2]=v[3]*(P[4]-P[3])
h[4]=h[3]+W_bomba[2]
P[5]=15000
T[5]=600
h[5]=Enthalpy(Water;T=T[5];P=P[5])
s[5]=Entropy(Water;T=T[5];P=P[5])
P[6]=1200
s[6]=s[5]
T_sat[6]=T_sat(Water;P=P[6])
h[6]=Enthalpy(Water;s=s[6];P=P[6])
P[7]=10
s[7]=s[6]
x[7]=Quality(Water;P=P[7];s=s[6])
h[7]=Enthalpy(Water;x=x[7];P=P[7])
y=(h[3]-h[2])/(h[6]-h[2])
q_entrada=h[5]-h[4]
q_salida=(1-y)*(h[7]-h[1])
n_termica=1-q_salida/q_entrada
SOLUTION
Unit Settings: [kJ]/[C]/[kPa]/[kg]/[degrees]
ntermica = 0,4632 [%] qentrada = 2767 [kJ/kg] qsalida = 1486 [kJ/kg] y = 0,2273
5 potential unit problems were detected.
Arrays Table
hi Pi Tsat;i vi si Wbomba;i Ti xi
[kJ/kg] [Kpa] [°C] [M3/Kg] [(kJ/kg)*K] [kJ/kg] [°C]
1 191,7 10 45,79 0,00101 0,6489 1,202
2 192,9 1200 0,6489 15,71
3 798,6 1200 188 0,001138 2,216
4 814,3 15000 2,216
5 3581 15000 6,677 600
6 2858 1200 188 6,677
7 2114 10 6,677 0,8037
