[Equest-users] Daylight and Overhangs

[Sami, Vikram]

Could you attach the inp file?

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From: equest-users-bounces at lists.onebuilding.org [equest-users-bounces at lists.onebuilding.org] On Behalf Of Kimberly Wiebe [Kimberly.Wiebe at BuroHappold.com]
Sent: Monday, June 13, 2011 6:57 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Daylight and Overhangs

Hello,


I am working on a facade optimization project. I simulated the same building with many different overhang depths and saw zero change in the lighting energy use between the iterations. I understand that eQuest daylighting calculations are not the best, but should the depth of the overhang not make an impact on lighting energy if my space uses daylight sensors? All other end uses show variation with the changing overhang depth. Sensors are at 10’ and 20’ from the window with a minimum light level of 25fc. Each sensor controls half of the space’s artificial lights, which is set to 0.55W/sf.
Please let me know if you have any insight on the effect of an overhang on available daylight. Thank you.


Kim

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