diff options
| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /2192/CH4/EX4.15/4_15.sce | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '2192/CH4/EX4.15/4_15.sce')
| -rwxr-xr-x | 2192/CH4/EX4.15/4_15.sce | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/2192/CH4/EX4.15/4_15.sce b/2192/CH4/EX4.15/4_15.sce new file mode 100755 index 000000000..b8f4d29a2 --- /dev/null +++ b/2192/CH4/EX4.15/4_15.sce @@ -0,0 +1,22 @@ +clc,clear
+printf('Example 4.15\n\n')
+
+P=30*1000/3 //power per phase
+V_ph=400/sqrt(3) //phase voltage
+R=(V_ph)^2/P //resistance of strip
+t=0.025*10^-2 //thickness of strip
+S=1.03*10^-6 //specific resistance of nichrome alloy
+l_by_w = R*t/S //because R=specific_resistance*l/(w*t) (i)
+
+k=0.6;e=0.9; //radiating efficiency and emissivity
+T1=1100+273; T2=700+273; //temperatures of wire and charge
+H=5.72*k*e*(T1^4-T2^4)/100^4 //heat dissipated from surface
+
+//surface_area = 2*w*l
+//Since, heat dissipated = Power input ; surface_area = P/H
+surface_area = P / H
+wl=surface_area /2 //product of w and l (ii)
+
+//dividing expression(ii) by expression(i)
+w=sqrt(wl/l_by_w)
+printf('Width of strip = %.2f mm',w*1000)
|