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Epanet-system disconnected error report
2

Epanet-system disconnected error report

Epanet-system disconnected error report

(OP)
Hello to everyone... I'm relatively new to Epanet modeling and have a problem... Probably, this question has been asked a hundred times before, but i hope i'm not bothering you...

After making the model and running hydraulics analysis, there is next error report:

-negative pressures at ----hrs
-negative pressures at ----hrs
-...
Ok, that's what i do understand about model, and i corrected it by increasing pipe diameters, but this part of the report:

-negative pressures at 20:01:47 hrs.
-node---is disconnected at 20:01:47 hrs
-node---is disconnected at 20:01:47 hrs
-...
-30 additional nodes are disconnected at 20:01:47 hrs
-system disconected because of link 1???

Ok... I read on the forum, maybe there was some closed link - but there was not... Also something like: there is no way to deliver asked demand to the node...
But how to solve the problem? (Probably, problem is the tank...??)

Between, link 1 is the pipe that connects tank and the 1st node on the network...

Thanks to everyone no matter what you write...

RE: Epanet-system disconnected error report

the storage tank goes empty at the time specified,
that would disconnect the nodes uphill and negative pressures

Hydrae

RE: Epanet-system disconnected error report

(OP)
Thanks for answering... It seams reasonable... According to that, I just made the storage tank diameter increased, and the problem was gone.

I also hope that's a reasonable solution...?

Thanks...

RE: Epanet-system disconnected error report

Or add controls to engage more supply,
the goal is to simulate the real world, what does the system do when that tank level drops?

Hydrae

RE: Epanet-system disconnected error report

(OP)
Ok... Then different pump setings I assume...
Also, I found there is no need to increase storage tank diameter - initial level only...

Like I siad,  I'm relatively new to Epanet modeling, so, once more, I hope I'm not bothering you...

This is the final model... Thanks Hydrae...

RE: Epanet-system disconnected error report

I made some very introductory level video tutorials on setting up an EPAnet model.  Feel free to see if anything on them helps:
http://www.youtube.com/watch?v=Ac36MoQFqzw
 

RE: Epanet-system disconnected error report

(OP)
Thanks RH27... All these video tutorials are very helpful.
Best regards...

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