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?
The working fluid has a higher density than water
Head increase / decrease / stay the same
Power increase / decrease / stay the same
Efficiency increase / decrease / stay the same
The working fluid has a higher viscosity than water