Water from a nearby lake is to be used for a fountain and a water tank. The figure below shows the elevations and pipe connections. It is desired that the jet water of the fountain reaches a height of at least 2.5 m from the nozzle outlet. As for the tank, it is elevated in order for it to distribute water using gravity. The specifications of nozzle, suction and discharge pipes are given in the table below. Assuming negligible minor head losses, what is the minimum power input to the pump in kW? Take pump efficiency to be 88% and motor efficiency, 95%. Water from the fountain is returned to the lake through a drainage (not shown in the figure).
Water from a nearby lake is to be used for a fountain and a water tank. The figure below shows the elevations and pipe connections. It is desired that the jet water of the fountain reaches a height of at least 2.5 m from the nozzle outlet. As for the tank, it is elevated in order for it to distribute water using gravity. The specifications of nozzle, suction and discharge pipes are given in the table below. Assuming negligible minor head losses, what is the minimum power input to the pump in kW? Take pump efficiency to be 88% and motor efficiency, 95%. Water from the fountain is returned to the lake through a drainage (not shown in the figure).
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Water from a nearby lake is to be used for a fountain and a water tank. The figure below shows the elevations and pipe connections. It is desired that the jet water of the fountain reaches a height of at least 2.5 m from the nozzle outlet. As for the tank, it is elevated in order for it to distribute water using gravity. The specifications of nozzle, suction and discharge pipes are given in the table below. Assuming negligible minor head losses, what is the minimum power input to the pump in kW? Take pump efficiency to be 88% and motor efficiency, 95%. Water from the fountain is returned to the lake through a drainage (not shown in the figure).
Round your answer to 4 decimal places.
Transcribed Image Text:VENT -
(GRAVITY TANK)
8 m
2.5 m
(NOZZLE)
H
PIPE BRANCH TO FOUNTAIN
10 m
(PUMP CENTERLINE)
(PUMP)
6 m
STRAINER
LAKE
MAIN DISCHARGE PIPE
PIPE BRANCH TO TANK
Transcribed Image Text:Nozzle
0.25 in. (6.35 mm)
230 mm
Outlet Diameter
Height (H)
Suction Pipe
Polyvinyl chloride
0.0568
Material
Friction Factor
Diameter
2 in. (50.8 mm)
Length
7.5 m
Main Discharge Pipe
Steel
Material
Friction Factor
0.023
2 in. (50.8 mm)
10.5 m
Diameter
Length
Pipe Branch to Nozzle
Steel
Material
Friction Factor
0.023
Diameter
1 in. (25.4 mm)
Length
3 m
Pipe Branch to Tank
Steel
Material
Friction Factor
0.023
1 in. (25.4 mm)
9 m
Diameter
Length
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