Q1) It is desirable to use the 32-in pump of Figure below at 1170 r/min to pump water at 60°F from one reservoir to another 120 ft higher through pipe 1500 ft long and 16 inch ID with friction factor f= 0.00725. (a) What will the operating point and efficiency be? (b) To what speed should the pump be changed to operate at the BEP?

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Q1) It is desirable to use the 32-in pump of Figure below at 1170 r/min to pump water
at 60°F from one reservoir to another 120 ft higher through pipe 1500 ft long and 16
inch ID with friction factor f= 0.00725.
(a) What will the operating point and efficiency be?
(b) To what speed should the pump be changed to operate at the BEP?
n = 1170 r/min
800
50
40
NPSH
700
-36금-in dia.
30
20
+ 600
32-in dia.
500
87%
400
2500 bhp
28-in dia.
300
(1500 bhp
200
4
8
12
16
24
28
U.S. gallons per minute × 1000
NPSH, ft
3500 bhp
%88]
%L8
3000 bhp.
2000 bhp
%78 -
20
Total head, ft
Transcribed Image Text:Q1) It is desirable to use the 32-in pump of Figure below at 1170 r/min to pump water at 60°F from one reservoir to another 120 ft higher through pipe 1500 ft long and 16 inch ID with friction factor f= 0.00725. (a) What will the operating point and efficiency be? (b) To what speed should the pump be changed to operate at the BEP? n = 1170 r/min 800 50 40 NPSH 700 -36금-in dia. 30 20 + 600 32-in dia. 500 87% 400 2500 bhp 28-in dia. 300 (1500 bhp 200 4 8 12 16 24 28 U.S. gallons per minute × 1000 NPSH, ft 3500 bhp %88] %L8 3000 bhp. 2000 bhp %78 - 20 Total head, ft
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