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Problem to solve - Pumping system Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. Take the water vapour pressure at 40 °C as 7376 N/m². a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? b) What is the NPSHA at the pump inlet? c) Would you expect cavitation in the pump to be a problem? Explain using the pump performance characteristics shown in figure (b). T 3m (a) (1) (b) 8 in. dia 500 400 7 = 300 Head, ft 200 100 O 6 PUMP 0 40 80 NPSHR Diameter = 50 mm Length = 200 m G9 15 65 63 120 160 200 240 280 Capacity, gal/min 60 55 50 40 bhp 30 25 20 15 320 505C 10 NPSHR, ft

Problem to solve - Pumping system Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. Take the water vapour pressure at 40 °C as 7376 N/m². a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? b) What is the NPSHA at the pump inlet? c) Would you expect cavitation in the pump to be a problem? Explain using the pump performance characteristics shown in figure (b). T 3m (a) (1) (b) 8 in. dia 500 400 7 = 300 Head, ft 200 100 O 6 PUMP 0 40 80 NPSHR Diameter = 50 mm Length = 200 m G9 15 65 63 120 160 200 240 280 Capacity, gal/min 60 55 50 40 bhp 30 25 20 15 320 505C 10 NPSHR, ft

Introduction to Chemical Engineering Thermodynamics
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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Water at 40 °C is pumped from an open tank through 200 m of 50
mm diameter smooth horizontal pipe as shown in figure (a) of the
system and discharges into the atmosphere with a velocity of 3
m/s. Minor losses are negligible. Take the water vapour pressure
at 40 °C as 7376 N/m2.
a) If the efficiency of the pump is 70%, how much power is
being supplied to the pump?
b) What is the NPSHA at the pump inlet?
c) Would you expect cavitation in the pump to be a problem?
Explain using the pump performance characteristics shown in
figure (b).

Problem to solve - Pumping system Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. Take the water vapour pressure at 40 °C as 7376 N/m². a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? b) What is the NPSHA at the pump inlet? c) Would you expect cavitation in the pump to be a problem? Explain using the pump performance characteristics shown in figure (b). T 3m (a) (1) (b) 8 in. dia 500 400 7 = 300 Head, ft 200 100 O 6 PUMP 0 40 80 NPSHR Diameter = 50 mm Length = 200 m G9 15 65 63 120 160 200 240 280 Capacity, gal/min 60 55 50 40 bhp 30 25 20 15 320 505C 10 NPSHR, ft
Transcribed Image Text:Problem to solve - Pumping system Water at 40 °C is pumped from an open tank through 200 m of 50 mm diameter smooth horizontal pipe as shown in figure (a) of the system and discharges into the atmosphere with a velocity of 3 m/s. Minor losses are negligible. Take the water vapour pressure at 40 °C as 7376 N/m². a) If the efficiency of the pump is 70%, how much power is being supplied to the pump? b) What is the NPSHA at the pump inlet? c) Would you expect cavitation in the pump to be a problem? Explain using the pump performance characteristics shown in figure (b). T 3m (a) (1) (b) 8 in. dia 500 400 7 = 300 Head, ft 200 100 O 6 PUMP 0 40 80 NPSHR Diameter = 50 mm Length = 200 m G9 15 65 63 120 160 200 240 280 Capacity, gal/min 60 55 50 40 bhp 30 25 20 15 320 505C 10 NPSHR, ft
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