A power plant requires 940 L/min of water. The required net head is 5 m at this flow rate. An examination of pump performance curves
A power plant requires 940 L/min of water. The required net head is 5 m at this flow rate. An examination of pump performance curves indicates that two centrifugal pumps with different impeller diameters can deliver this flow rate. The pump with an impeller diameter of 203 mm has a pump efficiency of 73 percent and delivers 10 m of net head. The pump with an impeller diameter of 111 mm has a lower pump efficiency of 67 percent and delivers 5 m of net head. What is the ratio of the required brake horse power (bhp) of the pump with 203-mm-diameter impeller to that of the pump with 111-mm-diameter impeller?
(a) 0.45
(b) 0.68
(c) 0.86
(d) 1.84
(e) 2.11
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Authors: Yunus Cengel, John Cimbala
3rd Edition
0073380326, 978-0073380322
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