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Diffstat (limited to '3720/CH14/EX14.2/Ex14_2.sce')
| -rw-r--r-- | 3720/CH14/EX14.2/Ex14_2.sce | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/3720/CH14/EX14.2/Ex14_2.sce b/3720/CH14/EX14.2/Ex14_2.sce new file mode 100644 index 000000000..b72c3c283 --- /dev/null +++ b/3720/CH14/EX14.2/Ex14_2.sce @@ -0,0 +1,17 @@ +//Example 14-2
+clc;clear;
+// Properties
+rho=62.30;//The density of water at 70°F in lbm/ft^3
+v=370;// gal/min
+g=32.2;// ft/s^2
+H_1=24;// ft
+H_2=72.0;// ft
+n_p2=0.765;
+n_p1=0.70;//Efficiency of the pump
+
+// Calculation
+bhp_1=((rho*g*v*H_1)/n_p1)*((0.1337)/(32.2*60*550));
+printf('Required bhp for the 8.25-in impeller option:bhp=%0.2f hp\n',bhp_1);
+bhp_2=((rho*g*v*H_2)/n_p2)*((0.1337)/(32.2*60*550));
+printf('Required bhp for the 12.75-in impeller option:bhp=%0.2f hp\n',bhp_2);
+printf('Clearly, the smaller-diameter impeller option is the better choice in spite of its lower efficiency, because it uses less than half the power.');
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