[EnergyPlus_Support] Re: Flow mismatch in radiant system - uploaded file

["e_matta81" <e_matta81@xxxxxxxx>]

Dear support,

I uploaded the file "office_flow_mismatch" in the files area.
Basically this model represents an office building.

Each zone has radiant system for heating and cooling with pipes
embedded in the ceiling.
Beside a ventilation system supplies air flow at 21 C.
The warning 

"Flow mismatch in radiant system--result will be an energy
imbalance--should not get this error
   **   ~~~   ** WaterInjectionRate=-1.72E-003"

appears several times and it seems related to a negative value of the
injection flow of the pump.

I tried to modify "Volume of the plant loop" in PLANT LOOP, but I
didn't obtain any improvement.


Thanks a lot for your help




--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte"
<mjwitte@...> wrote:
>
> I do not have any suggestions.  Please upload the idf file to the
yahoo group 
> files area or send as a zipped file to energyplus-support@...
> 
> Mike
> 
> 
> On 11 Jan 2008 at 15:31, e_matta81 wrote:
> 
> > Hi,
> > I'm simulating a building with radiant cooling and heating by
> > LOW_TEMP_RAD_SYST:CONSTANT_FLOW.
> > 
> > I can't understand how to solve this problem:
> > "Flow mismatch in radiant system--result will be an energy
> > imbalance--should not get this error
> > WaterInjectionRate=-1.35E-003"
> > 
> > I didn't use any autocalculation and any coils, but only purchased
> > chilled and hot water.
> > 
> > It seems that the program calculate a negative flow...
> > 
> > Thanks a lot for any help or suggestion!
> > 
> > JM
> > 
> > 
> > 
> > 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
> > 
> > 
> > 
> > 
> > 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@...
>




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