Scribd
Upload
46 views2 pages

"Datos": (KJ/KG-C) (KJ/KG-C) (M) (KG/S) (KG/S) (C) (C) (C) (KW/M - C)

This document contains data and calculations for heat transfer between two fluid streams. It provides temperature, mass flow rate, specific heat, diameter, and heat transfer coefficient values. The document then shows calculations for the heat transfer rate and logarithmic mean temperature difference. Finally, it presents a parametric table and plot examining the relationship between inlet temperature of one fluid stream and heat exchanger length.

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
46 views2 pages

"Datos": (KJ/KG-C) (KJ/KG-C) (M) (KG/S) (KG/S) (C) (C) (C) (KW/M - C)

This document contains data and calculations for heat transfer between two fluid streams. It provides temperature, mass flow rate, specific heat, diameter, and heat transfer coefficient values. The document then shows calculations for the heat transfer rate and logarithmic mean temperature difference. Finally, it presents a parametric table and plot examining the relationship between inlet temperature of one fluid stream and heat exchanger length.

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
You are on page 1/ 2

File:(Untitled) 24/07/2017 5:27:57 p. m.

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

"datos"
T_a_in=25 [C]
T_a_out=60 [C]
m_dot_a=0,2 [kg/s]
c_p_a=4,18 [kJ/kg-C]

m_dot_geo=0,3 [kg/s]
c_p_geo=4,31 [kJ/kg-C]
D=0,008 [m]
U=0,55 [kW/m^2-C]

"calculos"
Q_dot=m_dot_a*c_p_a*(T_a_out-T_a_in)
Q_dot=m_dot_geo*c_p_geo*(T_geo_in-T_geo_out)
DELTAT_1=T_geo_in-T_a_in
DELTAT_2=T_geo_out-T_a_out
DELTAT_lm=(DELTAT_1-DELTAT_2)/ln(DELTAT_1/DELTAT_2)
Q_dot=U*A*DELTAT_lm
A=pi*D*L

SOLUTION
Unit Settings: [kJ]/[C]/[kPa]/[kg]/[degrees]
A = 0,3687 cp,a = 4,18 [kJ/kg-C] cp,geo = 4,31 [kJ/kg-C]
D = 0,008 [m] T1 = 175 T2 = 117,4
Tlm = 144,3 L = 14,67 ma = 0,2 [kg/s]
mgeo = 0,3 [kg/s] Q = 29,26 Ta,in = 25 [C]
Ta,out = 60 [C] Tgeo,in = 200 [C] Tgeo,out = 177,4
U = 0,55 [kW/m2-C]

No unit problems were detected.

Parametric Table: Table 4


Tgeo;in L
[C]

Run 1 100 53,73


Run 2 111,1 40,64
Run 3 122,2 33
Run 4 133,3 27,89
Run 5 144,4 24,19
Run 6 155,6 21,39
Run 7 166,7 19,18
Run 8 177,8 17,39
Run 9 188,9 15,92
Run 10 200 14,67
File:(Untitled) 24/07/2017 5:27:58 p. m. Page 2
EES Ver. 8.400: #91: Educational version distributed by McGraw-Hill

55

50

45

40

35
L

30

25

20

15

10
100 120 140 160 180 200
Tgeo;in [C]

You might also like