Re: [EnergyPlus_Support] infiltration through closed windows

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

1.  Please send your input file so that we can reproduce this result. 

2.  COMIS treats a vertical window/door as having horizontal cracks 
at the top and bottom, which have uni-directional flow, and vertical 
cracks on the sides, which can have bi-directional flow.   

Mike  

On 18 Oct 2003, at 18:04, idoebber wrote:

> Sorry to keep emailing out like this but I promise this is the last
> one...at least for the next 15 minutes.
> 
> I had 2 questions on the cracks created surrounding the perimeter of
> the windows/doors.
> 
> 1.  When my air mass flow coefficient (Cq) per meter of crack is less
> then 0.0005, energy plus specifies no air flow through these cracks
> and I get numerous warning messages about my inside surface heat
> balance not converging since my maximum temperature differences is
> greater then the 0.002 temperature minimum.  Is there a requirement
> for this field that the value be greater or equal to 0.0005 and why is
> it effecting my surface heat balance.
> 
> 2.  When I do have Cq = 0.0005, I have bidirectional flow through the
> cracks which I thought energy plus only modeled for large vertical
> openings.  Can you explain to me why I have bidirectional flow for
> cracks around my windows/doors.
> 
> Thanks
> Ian
> 
> 
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx


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