Re: [EnergyPlus_Support] Assisted Ventilation

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

1.  You cannot serve the same zone with two air loops.  You can have more than 
one system serving a zone, but only one can be an AIR PRIMARY LOOP.  The other 
equipment must be zone equipment (window AC, fan coil, etc.).

2.  Direct air has no capability to control, so it will delivered the specified 
flow (unless the air loop supplying it cannot do so) at all times that it is 
available.

3.  The presence of ZONE CONTROL:THERMOSTATIC for a given zone determines 
whether there is a "zone load" that the HVAC equipment will try to meet, if it 
can (but Direct Air cannot do so anyway).

4.  The dummy zone does not need a full set of surfaces, it just needs one.  
You can use Surface:HeatTransfer:InternalMass if you wish.  Or use 
Surface:HeatTransfer and make it adiabatic by setting the 
OutsideFaceEnvironment to be itself.

Mike


On 3 Mar 2005, at 21:22, jms_dtz wrote:

> 
> 
> I'm using the direct Air object given to a dummy zone and then mixed 
> with the zone I need to simulate adding a separate air supply for 
> ventilation.  I also use a completely different air loop for supply 
> the direct air.  Within the dummy zone I need to define walls, is 
> there a way to make the walls non heat transfer surfaces or does the 
> direct air object not care about satisfying zone conditions?  This 
> question is regarding the same problem I posted earlier about 100% 
> outside air systems.
> 
> 
> 
> 
> 
> The primary EnergyPlus web site is found at:
> http://www.energyplus.gov
> 
> The group web site is:
> http://groups.yahoo.com/group/EnergyPlus_Support/
> 
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> 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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