Re: [EnergyPlus_Support] Daylighting obstructions

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

Well, I see that the daylighting section of the Input Output Reference is 
inconsistent on these subjects.  (On the list to fix now.)

Referring to p. 290 of the I/O Reference (pdf p. 327), internal obstructions 
accounted for in daylighting.  This is not mentioned in the list of differences 
for DElight, so I assume that DElight also accounts for internal obstructions.  
I cannot say that I have verified this for either of the daylighting models.

For solar gains, interior obstructions are not accounted for.  The FullInterior 
solar distribution options require a "convex" zone.  From p. 12 (pdf p. 49) "A 
formal definition of convex is that any straight line passing through
the zone intercepts at most two surfaces.)"

Mike


On 8 Sep 2006 at 11:04, Andy Tindale wrote:

> Mike,
> 
> Is it possible to use EnergyPlus to model large internal obstructions to
> solar and daylighting penetration within a zone using surfaces or other
> objects?.
> 
> Clearly this would require the full exterior and interior solar distribution
> option, but I just wondered whether the presence of any internal obstruction
> surfaces would be accounted for in the calculation of daylight factors and
> solar distribution about the space.  Are Daylighting:Detailed and
> Daylighting:DELight the same in this respect.
> 
> Thanks,
> 
> Andy
> 
> Andy Tindale
> DesignBuilder Software Limited
> Email: andy@xxxxxxxxxxxxxxxxxxx
> website: http://www.designbuilder.co.uk
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========================================================
Michael J. Witte, GARD Analytics, Inc.
EnergyPlus Testing and Support      
EnergyPlus-Support@xxxxxxxx





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