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Diffstat (limited to '3720/CH6/EX6.5/Ex6_5.sce')
| -rw-r--r-- | 3720/CH6/EX6.5/Ex6_5.sce | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/3720/CH6/EX6.5/Ex6_5.sce b/3720/CH6/EX6.5/Ex6_5.sce new file mode 100644 index 000000000..6cb783e73 --- /dev/null +++ b/3720/CH6/EX6.5/Ex6_5.sce @@ -0,0 +1,21 @@ +//Example 6_5
+clc;clear;
+// given values
+rho=0.076;//The density of air in lbm/ft^3
+V_1=7*1.4667;// Wind speed in ft/s
+D=30;//Diameter in ft
+W_act=0.4;//kW
+
+//Calculation
+//(a)
+A_1=(%pi*D^2)/4;
+m=rho*V_1*A_1;
+Ke_1=((V_1^2)/(2*32.2*737.56));
+W_max=m*Ke_1;
+n_wt=W_act/W_max;
+printf("The efficiency of the wind turbine–generator unit=%0.3f or(%0.1f percentage)\n",n_wt,n_wt*100);
+//(b)
+V_2=V_1*sqrt(1-n_wt);//The exit velocity in m/s
+F_r=(m*(V_2-V_1))/32.2;
+printf("The horizontal force exerted by the wind on the supporting mast of the wind turbine=%0.1f lbf\n",F_r);
+// The answer vary due to round off error
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