The pumping system shown below consists of a suction pipe of length 3m and diameter80mm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a losscoefficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 and 1.0,respectively; suction and delivery pipe friction factor f = 0.007 Darcy. A Robuschi 150-500pump rotates at 1470 rpm and the desired flow rate is a minimum of 200 m³/h.SUCTON EComplete the following tasks:1. Draw the system curve as described above on the Roubuschi pump curve datasheet supplied. Work in increments of Q 50m³/h starting at 0 (7-point curve)2. Would you advise the client to select the 400 or 460 impeller?Give two reasons for your answer.If the 6400 impeller is used:Assume:• the gauge pressure in the suction tank at 115 kPa,• the vapour pressure of the water at its average operating temperature at 20C• suction height as 1.5 m.3. Is the pump likely to cavitate? Support answer with a NPSH calculation approach.4. Describe two steps that could be taken to reduce the likelihood of cavitation. POMPAR150 · 5001470giri/minRPMGIRANTE: max/min - 499 / 400 mm - previsto Ø -Peso spec.- Vise.mmImp. gpm50010001500oUS. opm500100150020009아409:| 3003040506065707548080H460250ftm.704404201602006040050F1504030나10049946020 ft42040010-160200$ 499480460100 p440cvkW420100400200100Qm³/h300400500ROBUSCHJ"CLIENTEN 138061Ril.NPSH 3* HSDN

To given thatsuction pipe diameter,(d)=80mm=0.08mSuction pipe length=3mDelivery pipe…

e pumping system shown below consists of a suction pipe of length 3m and diar nm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a fficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 ane pectively; suction and delivery pipe friction factor f = 0.007Darcy- A Robuschi 150 np rotates at 1470 rpm and the desired flow rate is a minimum of 200 m/h. SUCTION E mplete the following tasks: 1. Draw the system curve as described above on the Roubuschi pump curve sheet supplied. Work in increments of Q 50m/h starting at o (7-point curve) 2. Would you advise the client to select the 400 or 460 impeller? Give two reasons for your answer.

e pumping system shown below consists of a suction pipe of length 3m and diar nm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a fficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 ane pectively; suction and delivery pipe friction factor f = 0.007Darcy- A Robuschi 150 np rotates at 1470 rpm and the desired flow rate is a minimum of 200 m/h. SUCTION E mplete the following tasks: 1. Draw the system curve as described above on the Roubuschi pump curve sheet supplied. Work in increments of Q 50m/h starting at o (7-point curve) 2. Would you advise the client to select the 400 or 460 impeller? Give two reasons for your answer.

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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Question

The pumping system shown below consists of a suction pipe of length 3m and diameter
80mm; delivery pipe of length 6m and diameter 80mm; 4 elbows, each with a loss
coefficient of k = 0.3; total static lift = 6m; tank entry and exit loss coefficients 0.5 and 1.0,
respectively; suction and delivery pipe friction factor f = 0.007 Darcy. A Robuschi 150-500
pump rotates at 1470 rpm and the desired flow rate is a minimum of 200 m³/h.
SUCTON E
Complete the following tasks:
1. Draw the system curve as described above on the Roubuschi pump curve data
sheet supplied. Work in increments of Q 50m³/h starting at 0 (7-point curve)
2. Would you advise the client to select the 400 or 460 impeller?
Give two reasons for your answer.
If the 6400 impeller is used:
Assume:
• the gauge pressure in the suction tank at 115 kPa,
• the vapour pressure of the water at its average operating temperature at 20C
• suction height as 1.5 m.
3. Is the pump likely to cavitate? Support answer with a NPSH calculation approach.
4. Describe two steps that could be taken to reduce the likelihood of cavitation.

POMPA
R
150 · 500
1470
giri/min
RPM
GIRANTE: max/min - 499 / 400 mm - previsto Ø -
Peso spec.
- Vise.
mm
Imp. gpm
500
1000
1500
o
US. opm
500
100
1500
2000
9아409:
| 300
30
40
50
60
65
70
75
480
80
H
460
250
ft
m.
70
440
4201
60
200
60
400
50
F150
40
30
나100
499
460
20 ft
420
400
10
-160
200
$ 499
480
460
100 p
440
cv
kW
420
100
400
200
100
Qm³/h
300
400
500
ROBUSCHJ"
CLIENTE
N 138061
Ril.
NPSH 3
* HSDN

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