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""Tarea Diseño de sistemas trmofluidos" "Gino Aguilera Soto" "problema 10,12" T_sat=247[K] C_fl=0.004 n = 1.7 A_s=25*(10^(-6)) "p=0,55" "propiedades" rho_l=1377 rho_v=5.26 h_fg=217000 sigma=(15.4)*(10^(-3)) c_pl=1551 mu_l=(1.46)*(10^(-4)) Pr_l=3.2 "proceso" q''_max=0.149*h_fg*rho_v*(sigma*g#*(rho_l-rho_v)/rho_v^2)^(0.25) q''_s=q''_max*p q_chip=p*q''_max*A_s T_s-T_sat=((C_fl*h_fg*Pr_l^n)/c_pl)*((q''_s/(mu_l*h_fg))^(1/3))*(sigma/(g#*(rho_l-rho_v)))^(1/6)
Parametric Table: Table 1 Ts
Run 1 Run 2 Run 3 Run 4 Run 5 Run 6 Run 7 Run 8 Run 9 Run 10 Run 11 Run 12 Run 13 Run 14 Run 15 Run 16 Run 17 Run 18 Run 19 Run 20 Run 21
247 250.2 251 251.5 252 252.4 252.7 253 253.3 253.6 253.8 254 254.2 254.4 254.6 254.8 254.9 255.1 255.3 255.4 255.6
p
0 0.05 0.1 0.15 0.2 0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65 0.7 0.75 0.8 0.85 0.9 0.95 1
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256 255 254 253 ] 252 K [ s
T 251
250 249 248 0
0.2
0.4
0.6
q''s /q''max
0.8
1
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"Gino Aguilera Soto" "problema 10,28" "T_s=converttemp(C;K;555[C])" T_sat=converttemp(C,K,100[C]) epsilon=0.5 D=2.5*(10^(-3)) "Propiedades" rho= 957.9 h_fg = 2257000 rho_v = 72.99 c_pv= 8750 mu_v = 22.7*(10^(-6)) k_v = 0.0929 C=0.62 "proceso" T_e=T_s-T_sat q''_s=pi#*D*T_e*h h=h_conv+3*h_rad/4 h''_fg=h_fg+0.8*c_pv*T_e h_rad=epsilon*sigma#*(T_s^4-T_sat^4)/T_e h_conv*D/k_v=C*(g#*(rho-rho_v)*h''_fg*rho_v*D^3/(mu_v*k_v*T_e))^(0.25) q''_rad=pi#*D^2*h_rad/4 y=q''_rad/q''_s
Gino Aguilera Soto problema 10,28 T s=converttemp(C;K;555 C )
T sat e
= ConvertTemp C , K 1 0 0 [C]
= 0.5 – 3
D = 2.5 · 10 Propiedades r
= 957.9 6
h fg = 2.257 x 10
rv
= 72.99
c pv = 8750 mv
– 6
= 22.7 · 10
k v = 0.0929 C = 0.62 proceso
Te
= T s – T sat
q'' s = 3.142 · D · Te · h h
= h conv
+ 3 ·
h rad 4
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= h fg + 0.8 · c pv · T e =
h conv ·
e
D kv
2
· 5.670E–08 [W/m -K ] ·
2
= C ·
9.807 [m/s ] ·
2
h rad 4
q'' rad q'' s
Parametric Table: D=2mm
Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
4
– T sat
4
Te
r
–
rv
· h'' fg ·
rv
D
· mv
q'' rad = 3.142 · D ·
y =
Ts
4
Ts
q''s
525 550 575 600 625 650 675 700 725 750 775 800 825 850 875 900 925 950 975 1000
2347 2666 2981 3294 3604 3913 4220 4526 4832 5137 5441 5746 6050 6355 6659 6964 7270 7576 7882 8189
3
· k v · T e
0.25
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7000
6000
5000
s ' ' 4000 q
3000
2000
1000 500
600
700
600
700
Ts
800
900
1000
800
900
1000
9000 8000 7000 6000 s ' ' q
5000 4000 3000 2000 500
Ts
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9000 8000 7000 6000 s ' ' q
5000 4000 3000 2000 500
600
700
Ts
800
900
1000
File:C:\Users\Gino\Downloads\problema10.38.EES 10/08/2018 9:22:12 p. m. Page 1 9.944: #4402: EASY ENGINEERING, https://www.youtube.com/channel/UCjC8ulmve2QNRJXhDpk-L2A+ CN xJID_JLN yNINGGBDE CJH@NYX _
"Gino Aguilera Soto" "problema 10.38" u_m=0.05 q''_s=100000 D=0.1 "x=15" G_sf=1 T_sat=452.8 "propiedades" rho_l=887.3 h_fg=2014000 mu_l=149.4*(10^(-6)) nu_l=1.684*(10^(-7)) k_l=0.6766 Pr_l=0.979 rho_v=5.094 mu_v=14.95*(10^(-6)) k_v=0.03353 Pr_v=1.149 "literal a" m_fl=rho_l*u_m*pi#*D^2 /4 x_x=q''_s*pi#*D*x/(m_fl*h_fg) Re_D=u_m*D/nu_l f=(0.790*ln(Re_D)-1.64)^(-2) Nu_D=((f/8)*(Re_D -1000)*Pr_l)/(1+12.7*(f/8)^(1/2)*(Pr_l^(2/3)-1)) h_sp=Nu_D*k_l/D h=(1.137*(rho_l/rho_v)^(0.45)*(abs(x_x))^(0.72)*(abs(1-x_x))^(0.08)+667.2*(q''_s/(m''_s*h_fg))^(0.7)*(abs(1-x_x))^(0.8)* G_sf)*h_sp m''_s=rho_l*u_m T_s=T_sat+(q''_s)/h "literal b" Re_D_1=4*m_fl/(pi#*D*mu_v) f_1=(0.790*ln(Re_D_1)-1.64)^(-2) Nu_D_1=((f/8)*(Re_D_1 -1000)*Pr_v)/(1+12.7*(f/8)^(1/2)*(Pr_v^(2/3)-1)) h_1=Nu_D_1*k_v/D T_s_1=T_sat+q''_s/h_1
Gino Aguilera Soto problema 10.38
u m = 0.05 q'' s = 100000 D = 0.1 x=15
G sf = 1 T sat = 452.8 propiedades rl
= 887.3
h fg = 2.014 x 10
6
– 6
ml
= 149.4 · 10
nl
= 1.684 · 10
– 7
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k l = 0.6766 Pr l = 0.979 rv
= 5.094
mv
= 14.95 · 10
– 6
k v = 0.03353 Pr v = 1.149 literal a
m fl
=
rl
· u m · 3.142 ·
x x = q'' s · 3.142 · D ·
Re D
D
2
4 x m fl · h fg
D
= u m ·
nl
f
=
0.79 ·
Re D
ln
f 8
=
nD
=
nD
·
·
– 2
Re D – 1000 1 /
f
1 + 12.7 ·
h sp
– 1.64
· Pr l
2
·
8
Pr l
2 /
3
– 1
kl D 0.45
h
=
rl
1.137 ·
xx
·
0.72
·
1 – xx
0.08
rv
m'' s Ts
=
rl
· u m q'' s
= T sat +
h
literal b
m fl
Re D,1 = 4 ·
f 1
=
3.142 · D ·
0.79 ·
ln
Re D,1 f
n D,1
8
=
1 + 12.7 ·
h1
=
n D,1 ·
kv D
·
mv
– 1.64
– 2
Re D,1 – 1000 f 8
1 /
· Prv
2
·
Pr v
2 /
3
– 1
+ 667.2 ·
q'' s m'' s · h fg
0.7
·
1 – xx
0.8
· G sf · h sp
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T s,1 = T sat +
q'' s h1
Parametric Table: Variar x
Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run Run
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36
x
Ts
-5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
469.2 470.5 472.1 474.3 477.3 483.5 478.8 476.7 475.3 474.2 473.4 472.7 472.1 471.6 471.2 470.8 470.5 470.3 470.1 469.9 469.9 469.8 469.8 470 470.2 470.6 471.4 473.7 471.8 469.3 467.9 466.8 466 465.2 464.6 464.1
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485
480
475 s
T
470
465
460 -10
-5
0
5
10 x
15
20
25
30
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"Gino Aguilera Soto" "problema 10.45" T_sat=100 b=0.5 L=0.5 "m_fl=25" "propiedades" m''_fl=m_fl/3600 h_fg=2257000 rho_l=967.1 cp_l=4203 mu_l=324*(10^(-6)) k_l=0.679 nu_l=3.35*(10^(-7)) "analisis" Re_etha=4*m''_fl/(mu_l*b) (T_sat-T_s)/(1+0.68*(cp_l/h_fg)*(T_sat-T_s))=(Re_etha^(1/0.82)-4.8)*(mu_l*h_fg*(nu_l^2/g#)^(1/3))/(3.70*k_l*L
Gino Aguilera Soto problema 10.45
T sat = 100 b
= 0.5
L
= 0.5
mfl =25 propiedades
m'' fl
=
m fl 3600
h fg = 2.257 x 10
rl
6
= 967.1
cp l = 4203 ml
– 6
= 324 · 10
k l = 0.679 nl
– 7
= 3.35 · 10
analisis
Re etha = 4 ·
m'' fl ml
· b
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Parametric Table: b=200mm
Run 1 Run 2 Run 3 Run 4 Run 5 Run 6 Run 7 Run 8 Run 9 Run 10 Run 11 Run 12 Run 13 Run 14 Run 15 Run 16 Run 17 Run 18 Run 19 Run 20 Run 21 Run 22 Run 23 Run 24 Run 25 Run 26 Run 27 Run 28 Run 29 Run 30 Run 31 Run 32 Run 33 Run 34 Run 35 Run 36
Ts
mfl
88.49 87.53 86.55 85.55 84.55 83.52 82.49 81.44 80.37 79.3 78.21 77.1 75.99 74.86 73.73 72.57 71.41 70.24 69.05 67.86 66.65 65.43 64.2 62.96 61.71 60.44 59.17 57.88 56.59 55.28 53.97 52.64 51.3 49.95 48.59 47.22
15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50
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100
96
92 s
T
88
84
80 15
20
25
30
20
25
30
mfl
35
40
45
50
35
40
45
50
100
96
92 s
T
88
84
80 15
mfl
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"Gino Aguilera Soto" "problema 10.68" T_sat=100 [C] q''_max=1.26*(10^6) [W/m^2] n=1 C_s_f=0.0130 D=0.020[m] L_b=0.020[m] L=0.1[m] "Propiedades del agua saturada a 100 grados celcuis" rho_l1=Density(Water,T=100 ,x=0) mu_l1=Viscosity(Water,T=100,x=0) cp_l1=Cp(Water,T=100,x=0) sigma_l1=SurfaceTension(Water,T=100) Pr_l1=Prandtl(Water,T=100,x=0) h_lf1=Enthalpy(Water,T=100,x=0) h_lg1=Enthalpy(Water,T=100,x=1) h_fg1=h_lg1-h_lf1
"Vapor" rho_v=Density(Water,T=100 ,x=1) "propiedades del agua satutada a 90 grados celcuis" rho_l2=Density(Water,T=90,x=0) mu_l2=Viscosity(Water,T=90,x=0) cp_l2=Cp(Water,T=90,x=0) k_l2=Conductivity(Water,T=90 ,x=0) nu_l2=mu_l2/rho_l2 "solucion a" q''_s_b=0.30*q''_max q''_s_b=mu_l1*h_fg1*(g#*(rho_l1-rho_v)/sigma_l1)*(cp_l1*(T_s_b-T_sat)/(C_s_f*h_fg1*Pr_l1^n)) "solucion b" q_b=q''_s_b*(pi#*D^2/4+pi#*D*L_b) m_dot=q_b/h_fg2 Re_2=4*m_dot/(mu_l1*pi#*D*h_fg2) h_fg2=h_fg1+0.68*cp_l1*(T_sat-T_s_c) Re_2=((3.70*L*k_l2*y)/(mu_l2*h_fg2*(nu_l2^2/g#)^(1/3))+4.8)^(0.82) y=(T_sat-T_s_c)
Gino Aguilera Soto problema 10.68
T sat
=
100 [C] 6
q'' max = 1.26 · 10 · 1 n
[W/m2]
= 1
C s,f = 0.013 D = Lb L
= =
0.02 [m] 0.02 [m] 0.1 [m]
Propiedades del agua saturada a 100 grados celcuis