Re: [EnergyPlus_Support] Mixing objects assumptions

["Edwin Lee" <leeed2001@xxxxxxxxx>]

There is also a cross-mixing object, which is described in the
documentation, that simulates air exchange between two zones, and therefore
affects both zones energy balance.

On Mon, Apr 28, 2008 at 9:36 AM, Richard Raustad <RRaustad@xxxxxxxxxxxx>
wrote:

>   When mixing objects are used, the user is responsible for accurately
> predicting the air flow into and out of a zone. Only air entering a zone
> is used in the heat balance. Infiltration and mixing (into a zone) are
> included in the heat balance predict step (mi and minf in Eng. Ref. Eq 2
> and 5) Supply air entering a zone is included in the heat balance
> correct step (msys in Eng. Ref. Eq 5). The return air leaving the zone
> is assumed to be balanced based on the supply and exhaust node mass flow
> rates (mixing and infiltration are not included here). You can read more
> about the assumptions for balanced flow in the text near these equations
> in the Engineering Reference.
>
>
> anarui.oliveira wrote:
> >
> > Hi, everyone.
> >
> > I think I've read this somewhere, but I can't find it now:
> >
> > - When doing the heat Balance for a Zone Air volume that is receiving
> > air with a mixing object, does E+ assume that an equal amount of air is
> > withdrawn from that zone, for heat balance purposes?
> >
> > Thank you in advance,
> > Ana Rui.
> >
> >
>
> --
> 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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