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

["tjutw" <tjutw@xxxxxxxxx>]

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
> >
>




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