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Piping System Brain Teaser #2: How does a fluid’s properties affect a centrifugal pump's performance?

Manufacturers typically test centrifugal pumps with water to develop a pump performance curve that they provide to their customers. But what if a customer is using that pump for a fluid other than water? Is the pump curve representative of how the pump will perform in their system?

Listed below are some pump performance characteristics and key fluid properties. At a given flow rate, what do you expect the pump performance to do?

 

  1. The working fluid has a higher density than water
    1. Head            increase / decrease / stay the same
    2. Power            increase / decrease / stay the same
    3. Efficiency        increase / decrease / stay the same
  2. The working fluid has a higher viscosity than water
    1. Head            increase / decrease / stay the same
    2. Power            increase / decrease / stay the same
    3. Efficiency        increase / decrease / stay the same


SOLUTIONS: Brain Teaser 2 Solutions.txt

 

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