Re: [EnergyPlus_Support] Night Purge

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

The VENTILATION command would be a good choice, because it gives you 
the option to ventilate until the zone cools down to the selected 
setpoint.  You can also control the indoor-outdoor temperature 
difference at which the ventilation will operate.

Regarding the interactions between COMIS and HVAC simualations.  The 
two are fully interactive thermally, but they do not interact with 
pressure.  In this application, and naturally-induced flows from the 
COMIS objects would continue to flow during operation of VENTILATION. 
 Since the flow from the night purge system would likely be so much 
greater than any naturally-induced flows, I do not think this would 
cause a significant error.

Sorry for the delayed response.

Mike


On 3 Feb 2003, at 10:21, Linda Lawrie wrote:

> At 12:37 AM 2/3/2003, Daniel Grunbaum wrote:
> >The
> >night purge would involve some sort of mechanical ventilation system
> >that would run throughout the night or when the temperature inside
> >reaches a certain point and the exterior temperature drops to a
> >certain point. Does anyone know the best way to model this using
> >Energy Plus.
> 
> A simplistic approach to this is to use the VENTILATION object in each
> zone.
> 
> I'm not sure if COMIS also might be able to do something like this
> directly?
> 
> 
> Linda
> 
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