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| author | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
|---|---|---|
| committer | prashantsinalkar | 2017-10-10 12:27:19 +0530 |
| commit | 7f60ea012dd2524dae921a2a35adbf7ef21f2bb6 (patch) | |
| tree | dbb9e3ddb5fc829e7c5c7e6be99b2c4ba356132c /534/CH3/EX3.5/3_5_Critical_Thickness.sce | |
| parent | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (diff) | |
| download | Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.gz Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.tar.bz2 Scilab-TBC-Uploads-7f60ea012dd2524dae921a2a35adbf7ef21f2bb6.zip | |
initial commit / add all books
Diffstat (limited to '534/CH3/EX3.5/3_5_Critical_Thickness.sce')
| -rw-r--r-- | 534/CH3/EX3.5/3_5_Critical_Thickness.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/534/CH3/EX3.5/3_5_Critical_Thickness.sce b/534/CH3/EX3.5/3_5_Critical_Thickness.sce new file mode 100644 index 000000000..6010ca20d --- /dev/null +++ b/534/CH3/EX3.5/3_5_Critical_Thickness.sce @@ -0,0 +1,22 @@ +clear;
+clc;
+printf('FUNDAMENTALS OF HEAT AND MASS TRANSFER \n Incropera / Dewitt / Bergman / Lavine \n EXAMPLE 3.5 Page 119 \n'); //Example 3.5
+// Critical Thickness
+
+k = .055; //[W/m.K] From Table A.3, Cellular glass at Temp 285K
+h = 5; //[W/m^2.K]
+ri = 5*10^-3; //[m] radius of tube
+
+rct = k/h; // [m] Critical Thickness of Insulation for maximum Heat loss or minimum resistance
+
+x = linspace(0,.07,100);
+ycond=(2.30*log10((x+ri)/ri)/(2*%pi*k));
+yconv=(2*%pi*(x+ri)*h)^-1;
+ytot=yconv+ycond;
+clf();
+plot(x,ycond,x,yconv,x,ytot);
+xtitle("Resistance vs Radii", "r-ri (m)", "R (m.K/W)");
+legend ("Rcond", "Rconv", "Rtotal");
+
+printf("\n\n Critical Radius is = %.3f m \n Heat transfer will increase with the addition of insulation up to a thickness of %.3f m",rct,rct-ri);
+//END
\ No newline at end of file |