elect the proper pump that has the est efficiency to raise 12 m³ of water rom the lower tank to the upper one. The time targeted for the process to be ompleted at least in 60 mins. The ump is located at zero elevation. Make your calculations at the minimum allowed depth in the lower ank (i.e. 1 m). What would be the fficiency and actual flow rate? Max: +3 m Pumn 3 Min: +1 m C = 150 D = 100 mm 60% 70% 80% +16 m L=10 m 90% L = 16 m DO 0 3. Using your recommended pump, ow long does it take the pump to elevate 12 m³ if the water level in the lower tank is fixed at 3 m. 40 00 00

Sustainable Energy
2nd Edition
ISBN:9781337551663
Author:DUNLAP, Richard A.
Publisher:DUNLAP, Richard A.
Chapter14: Ocean Thermal Energy Conversion And Ocean Salinity Gradient Energy
Section: Chapter Questions
Problem 14P
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A. For the system shown in the figure,
select the proper pump that has the
best efficiency to raise 12 m³ of water
from the lower tank to the upper one.
The time targeted for the process to be
completed at least in 60 mins. The
pump is located at zero elevation.
Make your calculations at the
minimum allowed depth in the lower
tank (i.e. 1 m). What would be the
efficiency and actual flow rate?
Head (m)
35
30
25
20
15
B. Using your recommended pump,
how long does it take the pump to elevate 12 m³ if the water level in the lower tank is fixed at 3 m.
40
10
5
0
-
0
Pump 3
Pump 2
Pump 1
0.001
Max: +3 m
0.002
Min: +1 m
I
I
60% 70% 80% 90%
T
I
1
I
I
+
T
1
I
I
+
I
CHw = 150
D = 100 mm
0.003
Flow (m³/s)
T
I
I
+
1
T
L=10 m
+16 m
0.004
L = 16 m
ooo
oo
ロロ
0.005
0.006
Transcribed Image Text:A. For the system shown in the figure, select the proper pump that has the best efficiency to raise 12 m³ of water from the lower tank to the upper one. The time targeted for the process to be completed at least in 60 mins. The pump is located at zero elevation. Make your calculations at the minimum allowed depth in the lower tank (i.e. 1 m). What would be the efficiency and actual flow rate? Head (m) 35 30 25 20 15 B. Using your recommended pump, how long does it take the pump to elevate 12 m³ if the water level in the lower tank is fixed at 3 m. 40 10 5 0 - 0 Pump 3 Pump 2 Pump 1 0.001 Max: +3 m 0.002 Min: +1 m I I 60% 70% 80% 90% T I 1 I I + T 1 I I + I CHw = 150 D = 100 mm 0.003 Flow (m³/s) T I I + 1 T L=10 m +16 m 0.004 L = 16 m ooo oo ロロ 0.005 0.006
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