Pipephase loop network model does not solve

[adam89]

Hi. I have working on a pipephase loop network model for a while now for our system. I think its time to get some outside help. For some reason, I could make it working. The best result that I could get is to make the iteration converge but still the software says "BASE CASE NOT SOLVED". So I am confused now on how to deal with it. I am starting to think that this software is not applicable to this model. FYI: We are using pumps to deliver water to the sink. I think it might have something to do with the configuration of the pumps. I have tried using pump curves but still no effect. I hope I can get a few tips from experts here.

 

[BigInch]

If you can post a PID of the configuration of your system and any boundry conditions you have set, it may give us some clues as to why it isn't autoconverging.

"We have a leadership style that is too directive and doesn't listen sufficiently well. The top of the organisation doesn't listen sufficiently to what the bottom is saying." Tony Hayward CEO BP
"Being GREEN isn't easy." Kermit

http://www.youtube.com/watch?v=hpiIWMWWVco

http://virtualpipeline.spaces.liv

 

[zdas04]

I saw the title and thought "why is that remarkable?"

Pipephase used to have a bug that had a big bias toward flowing from low numbered nodes to high numbered nodes. If you numbered your nodes from sink to source you would get really strange answers. This might be a similar (but more subtle, I think that one got fixed 5 years ago) bug.

David

 

[CJKruger]

adam89, if all else fails, try a tool that will converge for this system Such as Korf Hydraulics at

http://www.korf.co.uk

(please note that I am involved with it).