8.78. A pump is designed to operate at 1 800 r/min with 83.7% efficiency, and deliver 250 1/swith a power consumption of 141 kW. What is its specific speed and type?8.79. A manufacturer states that it can deliver a pump operating at 690 r/min that delivers285 1/s at 78% efficiency with a power consumption of about 5.2 kW under a head of 1.5 m.What type of pump is it? Is the efficiency claim reasonable, too high, or too low?8.80. Determine Ns for both model and prototype turbines in problem 8.75.

Given:N=1800 rpmη=83.7%Q=250 L/s =250*10-3 m3/sP=141 KW

Answered: 8.78. A pump is designed to operate at…

8.78. A pump is designed to operate at 1 800 r/min with 83.7% efficiency, and deliver 250 1/s with a power consumption of 141 kW. What is its specific speed and type?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

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Section: Chapter Questions

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8.78. A pump is designed to operate at 1 800 r/min with 83.7% efficiency, and deliver 250 1/s
with a power consumption of 141 kW. What is its specific speed and type?
8.79. A manufacturer states that it can deliver a pump operating at 690 r/min that delivers
285 1/s at 78% efficiency with a power consumption of about 5.2 kW under a head of 1.5 m.
What type of pump is it? Is the efficiency claim reasonable, too high, or too low?
8.80. Determine Ns for both model and prototype turbines in problem 8.75.

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