[EnergyPlus_Support] Re: PlantFlowResolver warnings --> fatal errors

["eric_zhou1223" <eric_zhou1223@xxxxxxxxx>]

Thank you very much for your reply, I am waiting eagerly for any 
suggestions for this problem. The project is stucked here for 
several days. It needs to be evaluated for the option "Constant 
primary variable secondary" in this project.

I noticed you questioned the issue "PlantFlowResolver" last year, 
and Mike asked you to submit your file. What was going on then? Is 
there a bug in this choice ""constant primary variable secondary""? 
My submitted file was based on the example file and the main 
difference is the building geometry.

For the severe error of "FindRootSimpleController", it looks not be 
the case actually, as this warning only happens in winter. 

thanks again , Tj.


--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "tjutw" <tjutw@...> wrote:
>
> It seems the main problem is the primary-secondary system for 
chilled
> water loop. If you change "chilled water pump configuration"  from
> "constant primary variable secondary" to "variable flow no 
secondary"
> , at least the model can run for a whole year although there are 
still
> some severe errors.  
> 
> For the severe error of "FindRootSimpleController: Controller error
> for controller", I do not know how to fix them.  One possible 
reason
> is that chiller capacity or cooling coil capacity is not 
sufficient. 
> 
> For primary-secondary system in E+, you may try to use another 
option
> "plant connection component". 
> 
> Hope it helps.
> 
> Tj Ywh
> 
> --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "eric_zhou1223"
> <eric_zhou1223@> wrote:
> >
> > 
> > This kind of warnings accumulated up to more than 30000 and 
> > terminated the program:
> > 
> >    **  Fatal  ** PlantFlowResolver: Previous condition for Plant 
> > Loop=CHILLED WATER LOOP CHILLED WATER LOOP, Branch=VAV SYS WS 
PREM 
> > COOLING COIL CHW BRANCH(>30,000 Out of Bounds errors) causes 
> > termination.
> > 
> > Where can I start to fix it? Your help would be appreciated much.
> > Please see the CompactObjectExm.idf in the submital zone.
> > 
> > Eric
> > 
> > --- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "eric_zhou1223" 
> > <eric_zhou1223@> wrote:
> > >
> > > Hi all,
> > > 
> > > I made an IDF file through the CompactHVAC and came across 
some 
> > > warnings as below, while the file was completed successfully 
> > anyway. 
> > > Anybody could tell me what does they imply and how can I fix 
them? 
> > > Thank you in advance.
> > > 
> > > 
> > >   ** Warning ** PlantFlowResolver: Branch flow rates out of 
> > bounds, 
> > > for Plant Loop=CHILLED WATER LOOP CHILLED WATER LOOP, 
Branch=VAV 
> > > SYS  WS CORE COOLING COIL CHW BRANCH
> > >    **   ~~~   ** Conditions should be: 18.275 <= 4.569 <= 
7.193 
> > > Occurrence info=SHANGHAI SHANGHAI CHN CUSTOM-583620 
WMO#=583620, 
> > > 08/01 07:00 - 07:15
> > >    
> > >   ..............................
> > >   
> > >      *************  ** Warning ** PlantFlowResolver: 
> > > Continuing...Branch flow rates out of bounds, for Plant 
> > Loop=CHILLED 
> > > WATER LOOP CHILLED WATER LOOP, Branch=VAV SYS  WS CORE COOLING 
> > COIL 
> > > CHW BRANCH
> > >    *************  **   ~~~   **   This error occurred 713 
times.
> > >    *************  **   ~~~   **   Max=5.708322  Min=4.568808
> > > 
> > > 
> > > 
> > > Eric
> > >
> >
>




The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are not allowed -- please post any files to the appropriate folder in the Files area of the Support Web Site.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
 
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    mailto:EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    mailto:EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/