8 replies to this topic

[panagiotis]

Hello everyone,
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!

[Bobby Strain]

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

[panagiotis]

Thanks Bobby,
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.

[breizh]

Hi,

You may find some interest with this link :https://pump-selecto...ASAAEgLm7fD_BwE

 

many more using your favorite search engine .

 

Good luck

Breizh 

[panagiotis]

Hi Breizh,
Thanks for this. Actually, I would prefer to make a rough estimation myself and not to connect any vendor yet. ☺️

[breizh]

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  

[Art Montemayor]

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   22 downloads

[panagiotis]

Hi Art,
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.

[Bobby Strain]

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.