The 32-in diameter pump has a performance curve as below. The
pump is used at 1170 rpm in a
system whose head curve is hp = 110 + 1.5Q2 (in ft), with Q in
units of thousands of gallons of
water per minute. Please estimate the discharge and brake
horsepower (BHP) required for (a)
one pump, (b) two pumps in parallel, and (c) two pumps in
series.
The 32 In Diameter Pump Has A Performance Curve As Below The Pump Is Used At 1170 Rpm In A System Whose Head Curve Is H 1 (367.55 KiB) Viewed 57 times
n = 1170 r/min 800 50 40 NPSH 700 NPSH, ft 36-in dia. 65% 30 72% 78% *82% 85% 20 600 87% 88% Total head, ft 32-in dia. 500 87% 400 2500 bhp 28-in dia. 3000 bhp 3500 bhp 300 1500 bhp 2000 bhp 200 0 4 8 og 12 16 20 24 28 U.S. gallons per minute x 1000
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