Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. T 3 m 1 a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? What is the NPSHA at the pump inlet? Would you expect cavitation in the pump to be a problem? Explain using the pump performance characteristics shown in figure (b). (b) b) c) (a) (1) Solution PUMP Diameter = 50 mm (2) Length = 200 m Head, ft 500 400 300 200 100 0 0 8 in. dia 7 6 NPSHR 15 65 60 50 40 bhp 55 30 25 20 40 80 120 160 200 240 280 320 15 10 NPSHR, ft
Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. T 3 m 1 a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? What is the NPSHA at the pump inlet? Would you expect cavitation in the pump to be a problem? Explain using the pump performance characteristics shown in figure (b). (b) b) c) (a) (1) Solution PUMP Diameter = 50 mm (2) Length = 200 m Head, ft 500 400 300 200 100 0 0 8 in. dia 7 6 NPSHR 15 65 60 50 40 bhp 55 30 25 20 40 80 120 160 200 240 280 320 15 10 NPSHR, ft
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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please explain how to get the friction factor
Transcribed Image Text:Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth
horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere
with a velocity of 3 m/s. Minor losses are negligible.
T
3 m
1
a) If the efficiency of the pump is 70%, how much power is being supplied to the
pump?
What is the NPSHA at the pump inlet?
Would you expect cavitation in the pump to be a problem? Explain using the pump
performance characteristics shown in figure (b).
(b)
b)
c)
(a)
(1)
Solution
PUMP
Diameter = 50 mm (2)
Length = 200 m
Head, ft
500
400
300
200
100
0
0
8 in. dia
7
6
NPSHR
15
65
60
50
40 bhp
55
30
25
20
40 80 120 160 200 240 280 320
15
10
NPSHR, ft
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