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"Datos": (W/M - C) (W/M-C) (M)

This document contains the results of a heat transfer simulation. It includes the parameters used, such as material properties, geometry specifications, and initial temperatures. It then lists the calculated values for the heat transfer rate, efficiency, surface areas, and other output parameters. Finally, it shows a parametric table and plot varying the efficiency (epsi) and number of fins (nale) to understand their relationship.

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Andrés Téllez
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53 views2 pages

"Datos": (W/M - C) (W/M-C) (M)

This document contains the results of a heat transfer simulation. It includes the parameters used, such as material properties, geometry specifications, and initial temperatures. It then lists the calculated values for the heat transfer rate, efficiency, surface areas, and other output parameters. Finally, it shows a parametric table and plot varying the efficiency (epsi) and number of fins (nale) to understand their relationship.

Uploaded by

Andrés Téllez
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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File:(Untitled) 04/05/2017 10:19:48 a. m.

Page 1
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill

"datos"
As=0,15*0,20 [m^2]
Tb=85 [C];
k=237 [W/m-C]
s=0,002 [m];
L=0,04 [m]
Text=25 [C]
h=20 [W/m^2-C]

"solucion "

Ac=s^2
p=4*s
a=sqrt((h*p)/(k*Ac))
eta_fin=tanh(a*L)/(a*L)
Aale=nale*4*s*L
Au=As-nale*s^2
Q_dot_f=eta_fin*h*Aale*(Tb-Text)
Q_dot_u=h*Au*(Tb-Text)
Q_dot_total_ale=Q_dot_f+Q_dot_u
Q_dot_n=h*As*(Tb-Text)
epsi=Q_dot_total_ale/Q_dot_n

SOLUTION
Unit Settings: [kJ]/[C]/[kPa]/[kg]/[degrees]
a = 12,99 Aale = 0,1324 Ac = 0,000004
As = 0,03 Au = 0,02834 epsi = 5
fin = 0,9188 h = 20 [W/m2-C] k = 237 [W/m-C]
L = 0,04 [m] nale = 413,8 p = 0,008
Qf = 146 Qn = 36 Qtotal,ale = 180
Qu = 34,01 s = 0,002 Tb = 85
Text = 25 [C]

9 potential unit problems were detected.

Parametric Table: Table 3


epsi nale

Run 1 1,5 51,72


Run 2 1,889 91,95
Run 3 2,278 132,2
Run 4 2,667 172,4
Run 5 3,056 212,6
Run 6 3,444 252,9
Run 7 3,833 293,1
Run 8 4,222 333,3
Run 9 4,611 373,6
Run 10 5 413,8
File:(Untitled) 04/05/2017 10:19:49 a. m. Page 2
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill

450

400

350

300

250
nale

200

150

100

50
1,5 2 2,5 3 3,5 4 4,5 5
epsi

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