Re: [EnergyPlus_Support] Coil load errors

["Michael J. Witte" <mjwitte@xxxxxxxx>]

I believe the problem is with the SYSTEM SIZING "Central heating design supply 
air temperature" compared to the ZONE SIZING "Zone heating design supply air 
temperature".  For a single duct system, the reheat coil autosizing assumes 
that the entering air temperature is the "Central heating design supply air 
temperature" and the leaving air temperature is the "Zone heating design supply 
air temperature".  In this input file these are equal, so the reheat coil will 
see zero load for sizing.

Mike


On 21 Mar 2006 at 17:06, Sam Roose wrote:

> I have just uploaded a file to support of a building set to 20-23°C. These
> set-points are not being achieved. Temperatures range from 18-27°C just
> looking at the first few days of July. There is one particular error I am
> having trouble getting rid of which could cause this:
> 
> Warning ** The design coil load is zero for COIL:Water:SimpleHeating Zone 1
> Reheat Coil ** The autosize value for max flow rate is zero ** To change
> this, input a value for UA, change the heating design day, or lower the
> system heating design supply air temperature.
> 
> Changing the UA has no effect, nor does the heating design day. If the
> system heating design supply air temperature is changed in system sizing,
> that has also been tried. Any ideas?
> 
> Sam
> 
>   
> 
> 
> 
> 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@xxxxxxxx





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

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

<*> 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/