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Estimation Of Performance Curve
#1
Posted 28 April 2022 - 08:49 AM
I have seen that based on operating point of the pump or compressor, it is possible to estimate the performance curve for the pump or the compressor.
At the moment, I am interested in the pump.
Thank you in advance!
#2
Posted 28 April 2022 - 09:20 AM
Check the Flowserve site. They probably have pump curves for something close. Or, you probably have the name of the manufacturer for your pump. If so, visit their site.
Bobby
#3
Posted 28 April 2022 - 09:32 AM
I will check it out. Generally, there is not way to make an estimation ourselves. I am aware that this performance curve is based on impeller characteristics. Maybe I have to think a bit more.
#4
Posted 28 April 2022 - 10:14 PM
Hi,
You may find some interest with this link :https://pump-selecto...ASAAEgLm7fD_BwE
many more using your favorite search engine .
Good luck
Breizh
#5
Posted 28 April 2022 - 11:18 PM
Thanks for this. Actually, I would prefer to make a rough estimation myself and not to connect any vendor yet. ☺️
#6
Posted 28 April 2022 - 11:25 PM
Hi,
This is not going to happen , the only estimation I'm aware of is the efficiency of a centrifugal pump vs flow rate and head published by Carl Branan in his book "Rules of thumb for chemical engineers" 4th Edition .
another reference:
https://www.pumpfund...ok/chapter4.pdf
Edit :
Consider this literature :
https://www.scielo.b...TXq6z/?lang=en#
Good luck
Breizh
#7
Posted 29 April 2022 - 09:12 AM
Panagiotis:
As usual, Breizh is exactly correct. His technical library is an engineer's gold mine.
I also have a hard copy of the mentioned book and I transcribed the attached article that Breizh mentions. I cleaned it up a little. Mr. Branan was not that good of a writer; but he obviously was a great practical engineer. What he did was: he took some published centrifugal pump performance curves issued by the old contractor, M.W. Kellogg and he regressed them to obtain an equation. I am from his generation and I can imagine that he probably regressed the curves with manual calculations using the method of Least Squares - not much fun. Today, I can do it with a computer program in a few minutes. You could do the same.
You don't give us any background or reasons for your query. I hope this helps you in whatever you are doing.
Centrifugal Pump Efficiency Estimation.docx 18.53KB
24 downloads
#8
Posted 29 April 2022 - 01:17 PM
Thanks for your reply. I wanna transfer liquid between two atmospheric tanks.
I know the flow rate and I calculated the corresponding head.
My aim is calculate the estimated performance curve by knowing this operating point.
#9
Posted 29 April 2022 - 08:47 PM
That's not the way to get to the right pump. You find a pump curve from the Flowserve site that fits your requirements. Nobody does what you are contemplating.
We all followed a red herring!
Bobby
Edited by Bobby Strain, 01 May 2022 - 11:10 AM.
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