[Bldg-sim] natural ventilation for LEED

[David Bradley]

Karen,
 Yes, we have. We used CONTAM, which is a bulk air flow modeling tool 
available from NIST (www.nist.gov) coupled with TRNSYS . TRNSYS did the 
thermal model and CONTAM did the interzonal air flows. If your building 
model is a single zone, however, I don't think CONTAM or other bulk air 
flow models (such as COMIS) will be appropriate, however. Bulk air flow 
models define pressure nodes (much like the thermal zones of a building) 
and predict air flow between those nodes based on the resistance offered 
by gaps around doors, the porosity of building materials, joints between 
walls, window frames, operable windows, etc.). If you are just dealing 
with one large space then the internal resistance to air flow is quite 
low and you would probably need to use a CFD tool such as Fluent to get 
at it.
Kind regards,
 David


Karen Walkerman wrote:
> Hi All,
>
> has anyone completed a "macroscopic multi-zone, analytic model that 
> predicts room-b-room outdoor air flow rates" for LEED NC 2.2 EQ credit 
> 2?  What software did you use?  I'm actually evaluating just one large 
> space for my current project.
>
> Any help is appreciated.
>
> Thanks,
>
>
> ~Karen~
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Thermal Energy System Specialists (TESS), LLC 
David BRADLEY                      2916 Marketplace Drive - Suite 104 
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                                   USA
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