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#1
Posted 20 July 2020 - 09:53 AM
There is also tank C that sends liquid to pump C that delivers liquid to tank D.
Now according to new design, discharge of pump A will be connected to suction of pump C. How to find discharge pressure of pump A(which is the suction pressure of pump C)?
The way i calculated was : i calculated suction of pump A, then used pump curve, found rated head, converted to bar, and aded up to suction pressure got the discharge pressure of pump A. Then i used the discharge pressure of pump A, substracted friction loses of the pipe between pump A and C, took static elevation into account, and thus found suction pressure of pump C. Is it a right way to size pump? Could you please help? Both of them are centrifugal pumps
#2
Posted 20 July 2020 - 10:41 PM
Please upload a simple sketch of the system you described...
#3
Posted 20 July 2020 - 11:54 PM
lorean,
Please don't duplicate the same post !
We are happy to help but we want you to tell us your difficulties showing your work or at least submitting minimum information , sketch for us to support .
BTW did you talk to your supervisor ?
note : I've attached a great resource about centrifugal pump to support your work.
Engineering is about hard work .
Good luck
Breizh
Edited by breizh, 21 July 2020 - 12:45 AM.
#4
Posted 21 July 2020 - 04:44 AM
Dear Breizh and Fallah, thanks you for your time
I have spent more than an hour and still could not figure out how to attach image sketch here...
I hope you ll be able to open this sketch url,
Sorry, i m new here, i did not know that i am supposed to post only 1 post in only one forum
Thanks
Edited by Lorean, 21 July 2020 - 04:47 AM.
#5
Posted 21 July 2020 - 05:42 AM
Hi,
Next time click on the button "more reply options" bottom right corner then attach your documents .
BTW we got your sketch .
You have two pumps in serie , you need to generate the pump curve for 2 pumps .
Make sure the pumps are compatible and won't affect their performance working in serie.
https://www.ksb.com/...eration/191658/
Good luck
Breizh
Edited by breizh, 21 July 2020 - 05:44 AM.
#6
Posted 21 July 2020 - 08:14 AM
The pumps are existing pumps, so is the way i calculated right? Because the curve for both of them already exists.
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