Re: [EnergyPlus_Support] Mixing Volume Problem

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

There is a problem in the reporting for mixing volumes.  For infiltration, 
ventilation, and mixing, the user specified volume flow rates are converted to 
a mass flow rate and then converted back to volume flow for reporting.  In the 
case of mixing, the zone conditions are used to determine the air density for 
the first conversion, but the second conversion incorrectly uses the outside 
air density.  A change request will be submitted to fix this.  So the mixing 
mass flow rate is correct in the simulation heat balance, just the reporting is 
off.

Mike


On 13 Jun 2004, at 12:34, itamargoldberger wrote:

> Hi All
> I am running a class + corridor model and I noticed a strange Results:
> The Ventilation and Infiltration that enter the zones ( Class1-3 and 
> Cor1-3 ) are exact the volume I specified in the idf.
> BUT the Mixing air volume (between the Class and corridor) is not the 
> same I specified in the idf .
> 
> Please enter the file called Adif4_5_N_Det.idf, Run it and see the 
> Mixing volume.
> 
> Does the Mixing works different from the Ventilation or Infiltration 
> methods?
> 
> Thanks 
> Itamar 
> 
> 
> 
> 
> 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.
> 
> Yahoo! Groups Links
> 
> 
> 
> 
> 
> 



========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx



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