Thank you all for your comments!
@LittleInch
I'm not sure if I misunderstood what your asking but we use the fluid coupling to control speed of the pump. Its considered a VSD that transfers the motor power to the pump, hydro-dynamically.
@TenPenny
Thanks for attaching the page! Apparently...
@LittleInch
I do have access to the pump curve. I want to compare the calculated efficiency to the ones from the tested pump curve provided by the manufacturer.
The actual shaft power is difficult with the torque converter
@TenPenny
Do you have a copy of that literature you could post here?
Thank you all for your comments!
@georgeverghese
On page 76 it states that "pump efficiency is low at low flows" which makes sense based on pump performance curves. But to me it doesn't seem like the author is saying the equation can only be used in cases when the pump is running at low flow...
Hi,
I'm working on a project to estimate pump efficiency where pump temperature, pressure, and flow are the only readily available data. I came across a formula in "Forsthoffer's Best Practice Handbook for Rotating Machinery" that relates pump efficiency to temperature difference. In this book...
