A pump is used to deliver water from BAWADI reservoir that is situated at Mt. Cabuyao, Sto. Tomas at a rate of 0.2832 m3/s. The water level in the reservoir is 1.280 m below the pump. The pressure is assumed to be atmospheric at 98.62 kPa and the temperature of the water is 20oC. The total head loss in the suction pipe is 1.158 m of water. Determine the NPSH of the pump used
A pump is used to deliver water from BAWADI reservoir that is situated at Mt. Cabuyao, Sto. Tomas at a rate of 0.2832 m3/s. The water level in the reservoir is 1.280 m below the pump. The pressure is assumed to be atmospheric at 98.62 kPa and the temperature of the water is 20oC. The total head loss in the suction pipe is 1.158 m of water. Determine the NPSH of the pump used
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Instruction :Solve the problem neatly and systematically. Use free-floating decimals in all your calculations and in expressing your answers. Box your final answers
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3. A pump is used to deliver water from BAWADI reservoir that is situated at Mt. Cabuyao, Sto. Tomas at a rate of 0.2832 m3/s. The water level in the reservoir is 1.280 m below the pump. The pressure is assumed to be atmospheric at 98.62 kPa and the temperature of the water is 20oC. The total head loss in the suction pipe is 1.158 m of water. Determine the NPSH of the pump used.
#use the pictures as reference as needed in your solution
Transcribed Image Text:NET POSITIVE SUCTION HEAD (NPSH):
the difference between the static head at the suction inlet and the head
corresponding to the vapor pressure of the liquid at the pump inlet
P,
hf suction
9c (Par –
NPSH =
g
- Za
where:
Pa' = abs. Pressure at the surface of the reservoir
Pv = vapor pressure
Za = height from the surface of the of the reservoir to the suction point in the
pump
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