4. The system in Fig. consists of 1200 m (length) of 0.05 m (diameter) cast iron pipe, two 45° long-radius elbows, four 90° flanged long-radius elbows, and a fully open globe valve. If the elevation at point 1 is 400 m, what gage pressure is required at point 1 to deliver 0.005 m³/s of water at 20°C into the reservoir? Average surface roughness of cast iron is ε = 0.26 mm. For water at 20°C, take density, p = 998 kg/m³; dynamic viscosity, μ = 0.001 Pa-s; and acceleration due to gravity, g = 9.81 m/s².
4. The system in Fig. consists of 1200 m (length) of 0.05 m (diameter) cast iron pipe, two 45° long-radius elbows, four 90° flanged long-radius elbows, and a fully open globe valve. If the elevation at point 1 is 400 m, what gage pressure is required at point 1 to deliver 0.005 m³/s of water at 20°C into the reservoir? Average surface roughness of cast iron is ε = 0.26 mm. For water at 20°C, take density, p = 998 kg/m³; dynamic viscosity, μ = 0.001 Pa-s; and acceleration due to gravity, g = 9.81 m/s².
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:f
0.1
0.09
0.08
0.07
0.06
0.05
0.04
0.03
0.025
0.02
0.015
0.01
0.009
0.008
Laminar
flow
10³
1
1
---
Transition range
2(10³) 468
104
Moody Chart
Wholly turbulent flow
Smooth
2(104) 4 6 8
105
2(105) 4 68
Re=
pVD
μ
106
2(106) 4 6 8
107
2(107) 4 6 8
0.05
0.04
0.03
0.02
0.015
0.01
0.008
0.006
0.004 D
0.002
0.001
0.0008
0.0006
0.0004
0.0002
0.0001
0.00005
0.00001

Transcribed Image Text:4. The system in Fig. consists of 1200 m (length) of 0.05 m (diameter) cast iron pipe, two 45°
long-radius elbows, four 90° flanged long-radius elbows, and a fully open globe valve. If the
elevation at point 1 is 400 m, what gage pressure is required at point 1 to deliver 0.005 m³/s of
water at 20°C into the reservoir? Average surface roughness of cast iron is ε = 0.26 mm. For water
at 20°C, take density, p = 998 kg/m³; dynamic viscosity, μ = 0.001 Pa-s; and acceleration due to
gravity, g = 9.81 m/s².
90° elbow:
KL90, elbow
K₁ = 0.5
ent
Elevation (1
400 m
= 0.3
45° elbow:
KL45,elbow=0.2
Elevation
500 m
!
Sharp
exit
Open KL = 10
globe
valve
Klexit
= 1
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