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Re: [EnergyPlus_Support] Minimum OA Calculation/Sum
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
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