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[EnergyPlus_Support] Re: Minimum OA Calculation/Sum



Richard

Thank you for your help. There is one thing I am still unclear about
from your response. Are you saying that the OA set in the Zone Sizing
object will not adjust to zone occupancy? If so, wouldn't the Zone
Sizing also handle DCV?

Thanks

-
aj

--- In EnergyPlus_Support@xxxxxxxxxxxxxxx, Richard Raustad
<RRaustad@...> wrote:
>
> Your are correct in that the zone sizing object determines the minimum 
> OA flow rate when autosizing. The ventilation mechanical object is used 
> to provide demand controlled ventilation. Also notice that the flow 
> rates specified in the Vent:Mech object can not be autosized. So the 
> Vent:Mech works in conjunction with the OA system and the OA air flow 
> rates are restricted to the min/max flow rates in the OA controller..
> 
> Alan Jackson wrote:
> >
> > Can someone explain or point me towards the documentation has better
> > clarification on the way outdoor air is calculated? There are many
> > fields within the IDF file that autosize the minimum OA and I am
> > curious as to where these values are coming from. I initially thought
> > that they were coming from the Zone Sizing information but then I came
> > across the VENTILATION:MECHANICAL controller and could not distinguish
> > between the difference in functionality at that point. I have read the
> > I/O document and would appreciate a better understanding of how this
> > all works outside of economizer mode.
> >
> > thanks
> >
> > -
> > aj
> >
> >  
> 
> -- 
> Richard A. Raustad
> Senior Research Engineer
> Florida Solar Energy Center
> University of Central Florida
> 1679 Clearlake Road
> Cocoa, FL  32922-5703
> Phone:   (321) 638-1454
> Fax:     (321) 638-1439 or 1010
> Visit our web site at: http://www.fsec.ucf.edu
> 
> UCF - From Promise to Prominence: Celebrating 40 Years
>



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