Problem 1 Water needs to be transferred from one reservoir to another at a rate of 600 gpm. A schematic of the pipe system is shown. The static lift is 20 ft. All elbows have the same K₁ value. The suction pipe (upstream of the pump) is a total of 50 ft long with a diameter of 8 inches and the discharge pipe is a total of 450 ft long with a diameter of 6 inches. Use CH = 130. The centerline of the pump inlet is 7.2 ft above the lower reservoir water surface. The reservoirs are located near sea level. Water temperature is 50°F. HKL valve Pump = 5.0 KL₂ ent = 0.8 KL elbow = 1.5 exit (a) Determine the equation for the system curve. Simplify it as much as possible so it is in terms of only hp and Q. (b) Print out the next page. Draw the system curve on BOTH pump curves and determine which pump should be purchased (which graph and which impeller size). Submit your annotated printout with your assignment. Also submit supporting calculations. The system curves should be drawn using at least five points, including one located at Q = 0. [Hint: use a spreadsheet to calculate values of hp for a range of Q values] (c) Why did you pick the pump you picked? (d) Identify the operating point (Q and hp that will be delivered if the selected pump is installed and no changes are made to the system). (e) What size motor (horsepower rating) would you buy for this pump? Explain your work. (f) Determine the NPSHA. Will this installation be possible without damaging the pump impeller? Explain. If the elevation of the pump needs to be changed, explain where it should be relocated - assuming numbers of elbows and lengths of pipe segments do not change. (g) How would your answer to (e) change if the reservoir was located near Denver, at elevation 6000 ft above sea level? (h) How would your answer to (e) change if the water temperature was 100°F instead?
Problem 1 Water needs to be transferred from one reservoir to another at a rate of 600 gpm. A schematic of the pipe system is shown. The static lift is 20 ft. All elbows have the same K₁ value. The suction pipe (upstream of the pump) is a total of 50 ft long with a diameter of 8 inches and the discharge pipe is a total of 450 ft long with a diameter of 6 inches. Use CH = 130. The centerline of the pump inlet is 7.2 ft above the lower reservoir water surface. The reservoirs are located near sea level. Water temperature is 50°F. HKL valve Pump = 5.0 KL₂ ent = 0.8 KL elbow = 1.5 exit (a) Determine the equation for the system curve. Simplify it as much as possible so it is in terms of only hp and Q. (b) Print out the next page. Draw the system curve on BOTH pump curves and determine which pump should be purchased (which graph and which impeller size). Submit your annotated printout with your assignment. Also submit supporting calculations. The system curves should be drawn using at least five points, including one located at Q = 0. [Hint: use a spreadsheet to calculate values of hp for a range of Q values] (c) Why did you pick the pump you picked? (d) Identify the operating point (Q and hp that will be delivered if the selected pump is installed and no changes are made to the system). (e) What size motor (horsepower rating) would you buy for this pump? Explain your work. (f) Determine the NPSHA. Will this installation be possible without damaging the pump impeller? Explain. If the elevation of the pump needs to be changed, explain where it should be relocated - assuming numbers of elbows and lengths of pipe segments do not change. (g) How would your answer to (e) change if the reservoir was located near Denver, at elevation 6000 ft above sea level? (h) How would your answer to (e) change if the water temperature was 100°F instead?
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:TOTAL HEAD IN METERS
TOTAL HEAD IN METERS
30
25
20
5
O
30
25
20
15
O
5
TOTAL HEAD IN FEET
TOTAL HEAD IN FEET
100
90
80
70
60
50
40
30
20
10
0
100
90
80
70
60
50
40
30
20
10
O
0
0
0
O
13-0
12
12"
-10₂-
10
9.50
9
Impellers are trimmed in incre-
ments to supply required capacity.
Responsibility for final impeller sizing
remains with ITT Bell & Gossett.
8.5
CENTRIFUGAL PUMP SERIES 1510
8
7.5
200
50
100
5
CENTRIFUGAL PUMP SERIES 1510
Impellers are trimmed in incre-
ments to supply required capacity.
Responsibility for final impeller sizing
remains with ITT Bell & Gossett
PSH REQ
400
600
CAPACITY IN U.S. GALLONS PER MINUTE
100
150
CAPACITY IN CUBIC METERS/HR
74%
50
79%
800
5HP
Box
X
780,
75%
47.5HP
IOHP
100
CAPACITY IN CUBIC METERS/HR
200
to!
Approved Date 8-14-85
5G
1150 R.P.M.
1000
79%
200 300 400 500 600
CAPACITY IN U.S. GALLONS PER MINUTE
Box
4/200
78%
N.P.S.H. REQUIRED
ISHP
250
Approved JR Date 7/30/98
3BC
1750 R.P.M.
74%
1200
700
150
70%-
300
65%
15HP
800
NPSH IN FEET
30
20
10
0
1400
NPSH IN FEET
200
40
30
20
10
900
NPSH IN METERS
тв
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![Problem 1
Water needs to be transferred from one reservoir to
another at a rate of 600 gpm. A schematic of the pipe
system is shown. The static lift is 20 ft. All elbows
have the same K₁ value. The suction pipe (upstream
of the pump) is a total of 50 ft long with a diameter of
8 inches and the discharge pipe is a total of 450 ft
long with a diameter of 6 inches. Use CH = 130. The
centerline of the pump inlet is 7.2 ft above the lower
reservoir water surface. The reservoirs are located
near sea level. Water temperature is 50°F.
HKL
valve
Pump
= 5.0
KL₂ ent
= 0.8
KL elbow
= 1.5
= 1.0
V
(a) Determine the equation for the system curve. Simplify it as much as possible so it is in terms of only hp and Q.
(b) Print out the next page. Draw the system curve on BOTH pump curves and determine which pump should be
purchased (which graph and which impeller size). Submit your annotated printout with your assignment. Also submit
supporting calculations. The system curves should be drawn using at least five points, including one located at Q = 0.
[Hint: use a spreadsheet to calculate values of hp for a range of Q values]
(c) Why did you pick the pump you picked?
(d) Identify the operating point (Q and hp that will be delivered if the selected pump is installed and no changes are made
to the system).
(e) What size motor (horsepower rating) would you buy for this pump? Explain your work.
(1) Determine the NPSHA. Will this installation be possible without damaging the pump impeller? Explain. If the
elevation of the pump needs to be changed, explain where it should be relocated - assuming numbers of elbows and
lengths of pipe segments do not change.
(g) How would your answer to (e) change if the reservoir was located near Denver, at elevation 6000 ft above sea level?
(h) How would your answer to (e) change if the water temperature was 100°F instead?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Febb913e1-4986-4d74-b6ce-ad576ddf43d3%2F18b3fbcc-cf71-4068-9a5f-a2bb27c7abb4%2F6bgggks_processed.png&w=3840&q=75)
Transcribed Image Text:Problem 1
Water needs to be transferred from one reservoir to
another at a rate of 600 gpm. A schematic of the pipe
system is shown. The static lift is 20 ft. All elbows
have the same K₁ value. The suction pipe (upstream
of the pump) is a total of 50 ft long with a diameter of
8 inches and the discharge pipe is a total of 450 ft
long with a diameter of 6 inches. Use CH = 130. The
centerline of the pump inlet is 7.2 ft above the lower
reservoir water surface. The reservoirs are located
near sea level. Water temperature is 50°F.
HKL
valve
Pump
= 5.0
KL₂ ent
= 0.8
KL elbow
= 1.5
= 1.0
V
(a) Determine the equation for the system curve. Simplify it as much as possible so it is in terms of only hp and Q.
(b) Print out the next page. Draw the system curve on BOTH pump curves and determine which pump should be
purchased (which graph and which impeller size). Submit your annotated printout with your assignment. Also submit
supporting calculations. The system curves should be drawn using at least five points, including one located at Q = 0.
[Hint: use a spreadsheet to calculate values of hp for a range of Q values]
(c) Why did you pick the pump you picked?
(d) Identify the operating point (Q and hp that will be delivered if the selected pump is installed and no changes are made
to the system).
(e) What size motor (horsepower rating) would you buy for this pump? Explain your work.
(1) Determine the NPSHA. Will this installation be possible without damaging the pump impeller? Explain. If the
elevation of the pump needs to be changed, explain where it should be relocated - assuming numbers of elbows and
lengths of pipe segments do not change.
(g) How would your answer to (e) change if the reservoir was located near Denver, at elevation 6000 ft above sea level?
(h) How would your answer to (e) change if the water temperature was 100°F instead?
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