[EnergyPlus_Support] Re: Preheat Coil Operation

["asheaffe" <sheaffer@xxxxxxx>]

Mike,

I posted the file in the Problem Submital folder under the 
name "HospitalBest.zip"  Considering the problems I am having, the 
name is uniquely ironic, I know.  Also, I am having lots of issues 
with the Max Iterations being exceeded.  I have tried adjusting 
tolerances down, etc.  Any ideas?  

Thanks for your help.




--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, "Michael J. Witte" 
<mjwitte@...> wrote:
>
> I tried to reproduce the problem by adding preheat to example file 
CompactHVAC-
> 5ZoneVAVWaterCooled.idf, but the preheat coil puts out 7.2C, even 
with 100% OA 
> on the winter design day.  Please post the file in the yahoo file 
area or send 
> zipped to energyplus-support@...
> 
> Mike
> 
> 
> On 14 Nov 2006 at 22:36, asheaffe wrote:
> 
> > I am simulating a COMPACT VAV system that has a preheat coil due 
to 
> > the large amount of OA that my zones require.  I have the gas 
preheat 
> > coil set to deliver 7.2C minimum to the system.  However, during 
the 
> > simulation, the outlet temp of the coil regularly fluctuates 
below 
> > that temp.  In fact during the design day it stays at -3.5C.    
The 
> > schedule for the coil is currently blank, meaning it should be 
> > available all the time.  Any ideas on what might cause this?  I 
can 
> > post the file, if there are no quick fixes.
> > 
> > Thanks,
> > 
> > Andrew
> > 
> > 
> > 
> > 
> > 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.idf 
and press the
> > "search" button.
> >  
> > Yahoo! Groups Links
> > 
> > 
> > 
> > 
> > 
> > 
> 
> 
> ========================================================
> Michael J. Witte, GARD Analytics, Inc.
> EnergyPlus Testing and Support      
> EnergyPlus-Support@...
>





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