[Radiance-general] LEED modeling

[Gary Ashford]

Hi Cramer,

It all depends on the complexity of the spaces.  The corporate HQ project I
mentioned some time ago looks like it will meet NC 2.2 Platinum
requirements.  We've got Tim Metcalf at Kalwall doing the LEED NC2.2
Daylight modeling as we speak (they keep their glazing properties
proprietary for the skylights).  It is a ca. 1972 2 story Federalist box
which is redesigned with a lot of curtainwall, two central atria with
Kalwall roof skylights to supplement the perimeter offices with punched
windows.  Glazing Factor doesn't work in our case because there are a
variety of openings that interact with the interior spaces (and it is
conservative, no bounce).  Option 3 (measurement) looks like it might work
based on some preliminary test I did at the site, but who it is time
consuming and problematic near the great Lakes around the equinoxes.  I'll
let you know what the modeling tells us.

How's it going?

Regards,

Gary


On Tue, May 25, 2010 at 2:35 PM, Cramer Silkworth
<silkworth at transsolar.com>wrote:

>  Hi All,
>
> Has anyone out there done any daylight modeling for LEED projects? We're
> considering it, but wondering about how the LEED process affects things.
> Perhaps the glazing factor option is the way to go, instead of full-on
> modeling? And what about this sky condition, clear skies at noon on the
> equinox...including direct sun? Really? Not daylight factors under the CIE
> 10k? Sure, neither are perfect, but...
>
> Thanks,
> Cramer
>  --
> *Cramer Silkworth
> 212 219 2255 | silkworth at transsolar.com
> Transsolar Inc. | 134 Spring Street Suite 601 | New York, NY 10012
>
> Transsolar Climate Engineering
> Technical consulting for energy efficiency and environmental quality in
> buildings.
> New York - Stuttgart - Munich*
>
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