A centrifugal pump is to be placed at the bottom of a vertical shaft 350 m deep to deal with an inflow of water at the rate of 22 l/s. The choice lies between three pumps, one of 115 kW, one of 185 kW and one of 300 kW. Each pump has efficiency of 85%. 1. For each pump, calculate the approximate rate (litres/s) that can be pumped (ignore the friction and velocity heads) 2. For each pump, calculate the number of hours the pump would have to run (during a 24-hour day) to handle the inflow. 3. Which pump should be installed if the capacity should be at least double that required in case of flooding?
A centrifugal pump is to be placed at the bottom of a vertical shaft 350 m deep to deal with an inflow of water at the rate of 22 l/s. The choice lies between three pumps, one of 115 kW, one of 185 kW and one of 300 kW. Each pump has efficiency of 85%. 1. For each pump, calculate the approximate rate (litres/s) that can be pumped (ignore the friction and velocity heads) 2. For each pump, calculate the number of hours the pump would have to run (during a 24-hour day) to handle the inflow. 3. Which pump should be installed if the capacity should be at least double that required in case of flooding?
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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A centrifugal pump is to be placed at the bottom of a vertical shaft 350 m deep to deal with an inflow of water at the rate of 22 l/s. The choice lies between three pumps, one of 115 kW, one of 185 kW and one of 300 kW. Each pump has efficiency of 85%.
1. For each pump, calculate the approximate rate (litres/s) that can be pumped (ignore the friction and velocity heads)
2. For each pump, calculate the number of hours the pump would have to run (during a 24-hour day) to handle the inflow.
3. Which pump should be installed if the capacity should be at least double that required in case of flooding?
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