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diff --git a/1820/CH12/EX12.2/Example12_2.sce b/1820/CH12/EX12.2/Example12_2.sce new file mode 100755 index 000000000..98533881e --- /dev/null +++ b/1820/CH12/EX12.2/Example12_2.sce @@ -0,0 +1,39 @@ +// ELECTRIC POWER TRANSMISSION SYSTEM ENGINEERING ANALYSIS AND DESIGN
+// TURAN GONEN
+// CRC PRESS
+// SECOND EDITION
+
+// CHAPTER : 12 : CONSTRUCTION OF OVERHEAD LINES
+
+// EXAMPLE : 12.2 :
+clear ; clc ; close ; // Clear the work space and console
+
+// GIVEN DATA
+V = 40 ; // Actual wind velocity in mi/hr
+c_pg = 40 ; // Circumference at ground level in inches
+c_pt = 28 ; // Circumference at pole top in inches
+l = 35 ; // height of pole in feet
+l_g = 6 ; // Height of pole set in ground in feet
+d_c = 0.81 ; // dia. of copper conductor in inches
+span_avg = 120 ; // Average span in ft
+no_c = 8 ; // NO. of conductors
+
+// CALCULATIONS
+// For case (a)
+p = 0.00256 * (V^2) ; // Buck's Formula to find wind pressure on cylindrical surface in lb/ft^2
+d_pg = c_pg/(%pi) ; // dia. of pole at ground line in inches
+d_pt = c_pt/(%pi) ; // dia. of pole at pole top in inches
+h_ag = ( l - l_g ) * 12 ; // Height of pole above ground in inch
+S_pni = (1/2) * (d_pg + d_pt) * h_ag ; // projected area of pole in square inch
+S_pni_ft = S_pni * 0.0069444 ; // projected area of pole in square ft
+P = S_pni_ft * p ; // Total pressure of wind on pole in lb
+
+// For case (b)
+S_ni = d_c * span_avg * 12 ; // Projected area of conductor in square inch . [1 feet = 12 inch]
+S_ni_ft = S_ni * 0.0069444 ; // Projected area of conductor in square ft . [1 sq inch = (0.0833333)^2 sq feet ≅ 0.069444 sq feet]
+P_C = S_ni_ft * p * no_c ; // Total pressure of wind on conductor in lb
+
+// DISPLAY RESULTS
+disp("EXAMPLE : 12.2 : SOLUTION :-");
+printf("\n (a) Total pressure of wind on pole , P = %.2f lb \n",P);
+printf("\n (b) Total pressure of wind on conductors , P = %.2f lb \n",P_C);
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