blob: 7883d0d4bbb6a67e9b7b06d4a43a9349ce44e7e8 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
|
clc;
warning("off");
printf("\n\n example11.2 - pg501");
// given
r1=(2.067/2)/(12); //[ft]
r2=r1+0.154/12; //[ft]
r3=r2+3/12; //[ft]
L=1; //[ft]
Ka=26; //[Btu/h*ft*degF]
Kb=0.04; //[Btu/h*ft*degF]
T1=50; //[degF]
Ra=(log(r2/r1))/(2*%pi*L*Ka);
Rb=(log(r3/r2))/(2*%pi*L*Kb);
R=Ra+Rb;
deltaT=-18; //[degF] - driving force
Qr=-(deltaT/(R));
disp(Qr);
deltaT1=(-Qr)*(Ra);
T2=T1+deltaT1;
printf("\n\n The interface temperature is \n T2 = %f degF",T2);
|
