6 replies to this topic

[raju.kct]

Hello all,

 

I'm trying to understand the fluid system with multiple pumps in the network.

I've attached herewith a graphical approach of the system with single pump in operation and finding the operating point of the pump and flow to each outlet, File name: Pump system.jpg.

Could someone help me in finding the reference material or book for the similar graphical approach of finding the Operating point of all pumps and the flow to each outlet for the network shown in File name: Pumps in system.jpg.?

 

I think, this graphical approach seems to be more clear for understanding the process of flow divisions.

The pipeline segments are named as 1, 2 and 3 for convenience.

 

Assumptions: The pipeline dimensions and pump characteristics are known. All are centrifugal pumps.

 

 

Thank you,

 

 

 

 

Attached Files

•  Pump system.jpg   94.2KB   5 downloads
•  Pumps in system.jpg   20.54KB   2 downloads

[Profe]

Hi Raju.

 

For your question about system pump with branches.

I think the "Handbook of Chemical Engineering Calculations" 3ed  by Chopey, pages 6.47 to 6.52 will be useful.

 

Good luck

 

Fausto.

Pd. Review your mail.

[raju.kct]

Hello All,

 

Could someone help me in understanding the above mentioned problem? All references i've gone through are about the system with single or multiple pumps in circuit, but located before the circuit is divided into branches.

Any reference on the design of water distribution system to a city? i guess this circuit may have multiple pumps in multiple branches.

Thank you,

[Profe]

Hi Raju again!

 

Attached you will find a pdf file on the topic of distribution network calculations using the Hardy Cross method.

I hope it helps solve your concern

 

Good luck

 

Fausto

Attached Files

•  paper_Hardy-cross.pdf   279.04KB   26 downloads

[breizh]

hi ,

take a look at the spreadsheets attached  to support your work .

Hope this is going to help you .

 

Breizh

[gegio1960]

Dear Breizh and members,

I like the spreadsheets attached to the previous post.

I just noticed that some calculated pressures in the "network.xlsx" are negative. The trouble can be easily overcome by specifiying non negative values for the pressures in the Solver.

Anyway, I used the same approach to optimize a complicated network of sour water with 3 strippers and 2 tanks in a refinery....a funny and good job :-)

Similar approaches are also valid for fire water and flare systems but nowadays several commercial s/w are available to solve the relevant problems.

good luck!

[breizh]

Hi ,

Agree for the comments from Gegio 1960 .

I've attached a revision of the document . Sorry for the confusion .

Breizh