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Valve pattern

Offline Mohamed Liethy over 7 years ago

Dear Bentley

I have a problem with my model, I have 10 FCV in my model (1 fixed+9 with pattern)

the duration of simulation is 72 hours (3 days)

I want to make 7 of them active for day 1 only

another one for day 2 only & the last one for day 3 only

I make a pattern for 3 days as shown in images

and I give each FCV the pattern of its day

the issue is some FCV is active (has flow) some times more than setting flow in time that I don't want the flow to pass

through it.

another issue that I have storage ground tank that I want to store water in it only without flow out from it I make the inlet pipe has check valve that make the flow go to tank only (tank starts with percentage full 50%) I found the tank empty in some hours I checked if the tank has a demand and found that there is no demand on tank

so how and where the tank is emptying ?!!

thanks a lot and sorry for taking long

Top Replies

Offline Jesse Dringoli Tue, Oct 18 2016 2:27 PM +1

It will certainly be very helpful to have a copy of the model for troubleshooting. One general note in the meantime - make sure you aren't using a FCV to block the only path of flow to set demands. If…

0 Offline Craig Calvin Tue, Oct 18 2016 2:22 PM
Hello Mohamed,

Please provide your model files. There are two options for sharing your model on Communities, whichever you choose please be sure to zip your files first. The first option is to attach the zip file containing your model to your reply on the forum using the Advanced Reply Editor (you'll find the link below and to the right of the reply box). If your data is confidential please use the instructions in the link below to send it via Bentley Sharefile. Files uploaded to Sharefile can only be viewed by Bentley employees. Please be sure to reply on this thread with the name of the file after it has been uploaded.

http://communities.bentley.com/help/w/be_communities_help/7079.be-communities-secure-file-upload

Regards,

Craig Calvin

Bentley Technical Support
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0 Offline Jesse Dringoli Tue, Oct 18 2016 2:27 PM
It will certainly be very helpful to have a copy of the model for troubleshooting. One general note in the meantime - make sure you aren't using a FCV to block the only path of flow to set demands. If there are only demands downstream of a FCV (no tank or reservoir) and the sum of those demands is greater than the FCV setting, the flow will be forced through the FCV, to satisfy those assumed demands.

Check your user notification list for ill-conditioning and/or network unbalanced.

Regards,

Jesse Dringoli
Technical Support Manager, OpenFlows
Bentley Communities Site Administrator
Bentley Systems, Inc.
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