Problem 2 - Pumps in Parallel Two 32-in pumps, with performance curve shown below, are combined in parallel to deliver water at 60°F through 1500 ft of horizontal pipe. If f = 0.025, what pipe diameter will ensure a flow rate of 35,000 gal/min for n = 1170 rev/min?

Elements Of Electromagnetics
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Author:Sadiku, Matthew N. O.
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Problem 2 - Pumps in Parallel
Two 32-in pumps, with performance curve shown below, are
combined in parallel to deliver water at 60°F through 1500 ft of
horizontal pipe. If f = 0.025, what pipe diameter will ensure a
flow rate of 35,000 gal/min for n = 1170 rev/min?
1170 r/min
800
50
NPSH
700
600
500
400
300
200
Total head, ft
0
36-in dia.
32-in dia.
28-in dia.
4
8
82%
85%
1500 bhp
87%
88%
3000 bhp,
3500 bhp
87%
2500 bhp
2000 bhp
12
16
20
24
U.S. gallons per minute x 1000
28
8 8 8 8
NPSH, ft
40
30
20
Transcribed Image Text:Problem 2 - Pumps in Parallel Two 32-in pumps, with performance curve shown below, are combined in parallel to deliver water at 60°F through 1500 ft of horizontal pipe. If f = 0.025, what pipe diameter will ensure a flow rate of 35,000 gal/min for n = 1170 rev/min? 1170 r/min 800 50 NPSH 700 600 500 400 300 200 Total head, ft 0 36-in dia. 32-in dia. 28-in dia. 4 8 82% 85% 1500 bhp 87% 88% 3000 bhp, 3500 bhp 87% 2500 bhp 2000 bhp 12 16 20 24 U.S. gallons per minute x 1000 28 8 8 8 8 NPSH, ft 40 30 20
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