[bldg-sim] Energy-10: Material reflectance

[Rob Hitchcock]

Caroline,

The algorithms used in the Energy-10 daylighting calculations are based 
on those used in DOE2.1.  These algorithms account for interior surface 
reflectance by using the so-called "split-flux" method of calculating 
the effects of interreflection.  The surface reflectance is user 
modifiable within the daylighting zone dialog boxes.  Under the 
"Buildings" menu select "Bldg2" and then click the "Lighting Zones" 
button.  On the "Lighting Zones" dialog select a lighting zone from the 
list, and click the "Modify" button.  On the "Lighting Zone Details" 
dialog click the "Surfaces" button.  On the "Daylighting Surfaces" 
dialog select a Daylighting Surface from the list on the lower right and 
you can edit the Interior, Exterior, and Ground reflectance values for 
that surface.  Yes, I know this is painful.

Rob Hitchcock
==========
Caroline Prochazka wrote:

>I have been using Ecotect, Energy-10 and Desktop
>Radiance to run comparative light studies on existing
>buidlings. What I've noticed is that both Desktop
>Radiance and Ecotect address material reflectance, but
>Energy-10 does not. My concern is that I am getting
>slightly 'off' daylight factor values in Energy-10 in
>part, because there is no way to input reflectance of
>walls, floors ceilings. 
>
>Has anyone dealt with this?
>
>Regards,
>Caroline
>
>
>
>=====
>t.    519.822.3832
>e.    cjprocha at yahoo.com
>web:  http://www.geocities.com/cjprocha
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