17. A self-priming centrifugal pump is used to pump water at 25°C from a reservoir whose surface is 2.5 m below the centreline of the pump inlet (see figure below). The pipe is PVC pipe with an internal diameter of 25 mm and negligible average inner roughness height. The pipe length from the submerged pipe inlet to the pump inlet is 3.1 m. There are only two minor losses in the piping system from the pipe inlet to the pump inlet: a sharp-edged re-entrant inlet (KL = 0.85), and a flanged smooth 90° regular elbow (K₁ = 0.30). The pump's required net positive suction head is provided by the manufacturer as a curve fit: NPSHrequired = 2.5 m + [0.0015 m/(Lpm)²] V/², where volume flow rate is in Lpm. Determine the following: a) The maximum volume flow rate (in units of Lpm) that can be pumped without cavitation. Hint: compare available NPSH and required NPSH. 22-21 Reservoir Pump
17. A self-priming centrifugal pump is used to pump water at 25°C from a reservoir whose surface is 2.5 m below the centreline of the pump inlet (see figure below). The pipe is PVC pipe with an internal diameter of 25 mm and negligible average inner roughness height. The pipe length from the submerged pipe inlet to the pump inlet is 3.1 m. There are only two minor losses in the piping system from the pipe inlet to the pump inlet: a sharp-edged re-entrant inlet (KL = 0.85), and a flanged smooth 90° regular elbow (K₁ = 0.30). The pump's required net positive suction head is provided by the manufacturer as a curve fit: NPSHrequired = 2.5 m + [0.0015 m/(Lpm)²] V/², where volume flow rate is in Lpm. Determine the following: a) The maximum volume flow rate (in units of Lpm) that can be pumped without cavitation. Hint: compare available NPSH and required NPSH. 22-21 Reservoir Pump
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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B2
![17. A self-priming centrifugal pump is used to pump water at 25°C from a reservoir whose
surface is 2.5 m below the centreline of the pump inlet (see figure below). The pipe is PVC
pipe with an internal diameter of 25 mm and negligible average inner roughness height.
The pipe length from the submerged pipe inlet to the pump inlet is 3.1 m. There are only
two minor losses in the piping system from the pipe inlet to the pump inlet: a sharp-edged
re-entrant inlet (K₁ = 0.85), and a flanged
smooth 90° regular elbow (K₁ = 0.30). The
pump's required net positive suction head is
provided by the manufacturer as a curve fit:
NPSHrequired = 2.5 m + [0.0015 m/(Lpm)²] V/²,
where volume flow rate is in Lpm. Determine
the following:
Pump,
2₂-21
a) The maximum volume flow rate (in units
of Lpm) that can be pumped without
cavitation. Hint: compare available NPSH
and required NPSH.
Reservoir](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F1709d919-43f4-41ea-b74d-7b04178d80d8%2F9f66c020-05e2-4485-88be-8d8e5a373a61%2Fble8jnl_processed.png&w=3840&q=75)
Transcribed Image Text:17. A self-priming centrifugal pump is used to pump water at 25°C from a reservoir whose
surface is 2.5 m below the centreline of the pump inlet (see figure below). The pipe is PVC
pipe with an internal diameter of 25 mm and negligible average inner roughness height.
The pipe length from the submerged pipe inlet to the pump inlet is 3.1 m. There are only
two minor losses in the piping system from the pipe inlet to the pump inlet: a sharp-edged
re-entrant inlet (K₁ = 0.85), and a flanged
smooth 90° regular elbow (K₁ = 0.30). The
pump's required net positive suction head is
provided by the manufacturer as a curve fit:
NPSHrequired = 2.5 m + [0.0015 m/(Lpm)²] V/²,
where volume flow rate is in Lpm. Determine
the following:
Pump,
2₂-21
a) The maximum volume flow rate (in units
of Lpm) that can be pumped without
cavitation. Hint: compare available NPSH
and required NPSH.
Reservoir
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