For the system shown in Fig. the average velocity in the pipe is 10 m/s. Up to point A, K = 1.2, from B to C, K = 6.5, and the pump is 80% efficient. If pc = 170 kPa find pA and pe and the power required by the pump.
For the system shown in Fig. the average velocity in the pipe is 10 m/s. Up to point A, K = 1.2, from B to C, K = 6.5, and the pump is 80% efficient. If pc = 170 kPa find pA and pe and the power required by the pump.
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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
Transcribed Image Text:For the system shown in Fig. the average velocity in the pipe is 10 m/s. Up to point A, K = 1.2, from B to C, K = 6.5, and
the pump is 80% efficient. If pc = 170 kPa find PA and PB and the power required by the pump.
Water
O
O
30 m
Solution:
Energy analysis between different locations: (use the centerline of the lowest pipe as datum)
1. To determine the power required by the pump, we can use the energy from
0 Z₁ = 10 m;
10 cm dia.
0
P₁
3/20
O
2g
o Z2 =
11
2/1 32/20
=
32
3
o h₁ =
10 m
m;
m;
m;
m;
m;
Device
m;
o Hence pump head Hp =
o Power required by the pump Wp =
m;
kW.
to
where

Transcribed Image Text:o Power required by the pump W
2. Determine the pressure at A: we can use the energy from
o Z
O
O
O
5+
Pi
o
Y
11
11
o Z2 =
5/8
11
U
28
||
m;
m;
m;
m;
m;
h₁ =
• Hence pressure head at A: PA
o Finally, PA =
3. Similarly, work for location B, find that PB =
m;
=
kPa.
KkW.
m;
kPa.
◆ to
♦
where
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