10 Pump Curves
Transcript of 10 Pump Curves
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Some Pump manufacturers do not provide efficiency curves.
Instead they provide a performance curve for a certain impeller
diameter and with a specific electric motor. Such pumps should notbe used for selection of HVAC pumps. If the manufacturers cannot
provide an efficiency curve for a pump, another manufacturer
should be consulted
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Increasing impeller dia will be able to handle a greater head to deliver the same
flow rate. However pump will deviate from BEP
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Centrifugal Pumps are Variable Torque Machines. Power required to turn the
pump varies with the cube of the speed.
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A reduction in performance of the pump could occur due to unusual wear and
tear or entry of air into the pump.
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Increasing the number of pumps will reduce flow through each
pump.Indiscriminate addition of pumps result in the final pump adding only a
fraction of its capability to the system capability
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