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Old 12-17-2012
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Re: overpropped vs underpropped

Quote:
Originally Posted by Oaksail View Post
I test pumps and fluid flowrates for a living. Centrifugal pumps and fans operate with direct proportional flow rate vs rpm.
Decrease a pump by 15% rpm and you get 15% less flow.
Dat not wot my text books and test results said.

Quote:
Notice that larger pumps are inherently more efficient and that efficiency drops rapidly at specific speeds of 1000 or less. Jacques Chaurette p. eng.
Primary coolant centrifugal pumps would be classed as small?

However I know I am not a centrifugal pump expert.
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