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Diffstat (limited to '3681/CH4/EX4.4/Ex4_4.sce')
| -rw-r--r-- | 3681/CH4/EX4.4/Ex4_4.sce | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/3681/CH4/EX4.4/Ex4_4.sce b/3681/CH4/EX4.4/Ex4_4.sce new file mode 100644 index 000000000..2f3bff8b4 --- /dev/null +++ b/3681/CH4/EX4.4/Ex4_4.sce @@ -0,0 +1,23 @@ +// Calculating the length and width of strip
+clc;
+disp('Example 4.4, Page No. = 4.5')
+// Given Data
+e = 0.9;// Emissivity
+Radiating_efficiency = 0.75;// Radiating efficiency
+v = 250;// Voltage in volts
+P = 1000;// Power in Watts
+t = 0.2;// Thickness of nickel chrome strip
+T1 = 273+(300+30);// Temperature of strip in degree kelvin
+T0 = 273+30;// Temperature of ambient medium in degree kelvin
+p = 1*10^(-6);// Resistivity of nickel chrome
+// Calculation of length and width of strip
+e = e*Radiating_efficiency;// Effective co-efficient of emissivity
+q_rad = 5.7*10^(-8)*e*(T1^(4)-T0^(4));// Heat dissipated by radiation in Watt per meter square
+R = v*v/P;// Resistance of strip in ohm
+l_by_w = R*t*10^(-3)/p;// This is equal to l/w
+lw = 1000/(q_rad*2);// This is equal to l*w
+l = sqrt(lw*l_by_w);// Length of strip in meter
+w = (lw/l)*10^(3);// Width of strip in mm
+disp(l,'Length of strip (meter)=');
+disp(w,'Width of strip (mm)=');
+//in book Length is 36.2 meter and width is 2.9 mm. The answers vary due to round off error
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