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50 40 n = 1170 r/min 800 NPSH 700 36-in dia. 600 32-in dia. 500 3000 bhp. 2500 bhp 400 28-in dia. 2000 bhp 1500 bhp 300 28 24 20 16 200 12 U.S. gallons per minute x 1000 Total head, ft %z8 185% %L8 %88 3500 bhp 87% NPSH, ft

50 40 n = 1170 r/min 800 NPSH 700 36-in dia. 600 32-in dia. 500 3000 bhp. 2500 bhp 400 28-in dia. 2000 bhp 1500 bhp 300 28 24 20 16 200 12 U.S. gallons per minute x 1000 Total head, ft %z8 185% %L8 %88 3500 bhp 87% NPSH, ft

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Question

The 32-in pump in Fig.  is used at 1170 r/min in a
system whose head curve is Hs (ft) = 100 + 1.5Q2, with Q
in thousands of gallons of water per minute. Find the discharge
and brake horsepower required for (a) one pump,
(b) two pumps in parallel, and (c) two pumps in series.
Which configuration is best?

50 40 n = 1170 r/min 800 NPSH 700 36-in dia. 600 32-in dia. 500 3000 bhp. 2500 bhp 400 28-in dia. 2000 bhp 1500 bhp 300 28 24 20 16 200 12 U.S. gallons per minute x 1000 Total head, ft %z8 185% %L8 %88 3500 bhp 87% NPSH, ft
Transcribed Image Text:50 40 n = 1170 r/min 800 NPSH 700 36-in dia. 600 32-in dia. 500 3000 bhp. 2500 bhp 400 28-in dia. 2000 bhp 1500 bhp 300 28 24 20 16 200 12 U.S. gallons per minute x 1000 Total head, ft %z8 185% %L8 %88 3500 bhp 87% NPSH, ft
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