Re: [EnergyPlus_Support] About Displacment ventilation simulation

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

1.  Yes.

2.  No.  The user can control how much of the internal gains are added to the 
occupied zone vs. the upper zone. (See "Gain Distribution Schedule" field in 
UCSD DISPLACEMENT VENTILATION MODEL CONTROLS).

3.  EnergyPlus can model underfloor supply plenums and VAV terminal units with 
variable-speed fan and reheat coil, which are major components of UFAD systems. 
 Search the Input Output Reference for "UFAD", and see example files 
5ZoneSupRetPlen and 5ZoneSupRetPlenVSATU).  One major limitation of the 
EnergyPlus plenum model is that the air temperature is uniform from one end of 
the plenum to the other.  This limitation can be partially overcome by using 
multiple supply plenums in series, but each sequential plenum air temperature 
lags by one time zone time step.

Mike

On 1 Dec 2004, at 11:58, Xu Hongtao wrote:

> 
> 
> Dear All,
> 
> The programs of DOE-2 and BLAST use a uniform indoor air temperature for energy
> consumption simulation, right?
> 
> Energyplus develops the UCSD Displacement Ventilation Model for the existence of
> room air temperature difference. However, it requires the main heat sources
> should be located in the occupied zone, right? 
> 
> No for the underfloor air distribution (UFAD) system simulation is available,
> right? 
> 
> 
> 
> Xu 
> 
> (TRIMMED BY MODERATOR -- DELETED UNRELATED OTHER POSTS)
> 
> 
> 
> 
> 
> 
> 
> 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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