[Equest-users] Warning Daylighting unit normal greater than 1 - how to fix this?

[Nick Caton]

Hi Jason - that's pretty wacky!

Short of toying with the azimuth/orientation inputs, which it sounds like you've done, my next guess would be to compare the contents of your daylight sensor's inputs in the .inp against a known working model's - perhaps something will stick out as obvious.  

Also on re-reading, I wonder if it has to do with the orientation of your contributing window?  Try toying with that as well...  If messing with either alters the 0,0,1.0000001 coordinates in that message that'll be a strong clue as to where the problem lies.

Though I've never run into this, I have a strong hunch re-defining/re-entering your windows and/or daylighting inputs will ultimately be part of the solution.

~Nick

NICK CATON, P.E.
SENIOR ENGINEER

Smith & Boucher Engineers
25501 west valley parkway, suite 200
olathe, ks 66061
direct 913.344.0036
fax 913.345.0617
www.smithboucher.com 


-----Original Message-----
From: equest-users-bounces at lists.onebuilding.org [mailto:equest-users-bounces at lists.onebuilding.org] On Behalf Of Jason Quinn
Sent: Sunday, April 01, 2012 10:28 PM
To: equest-users at lists.onebuilding.org
Subject: [Equest-users] Warning Daylighting unit normal greater than 1 - how to fix this?

I've a atrium with glass roof and walls - I've set this up with really large separate windows. This error about unit normal has popped up in the .sim file (although my results have not shifted that I can tell.

 **WARNING**********************************************************************
           Daylighting coefficient calculation for SPACE LV8SE Perim Spc (G.SE10)
           for reference point   1 encountered an ERROR.
           The unit normal for the contribution from WINDOW LV8Skylt
(G.SE10.E19.S1)
           had a length greater than 1.0. WNORM was:  0.0000000
0.0000000    1.0000001
           One or more WNORM components have been reset to 1.0 to correct the problem.

Any ideas on how to fix this? I moved the daylight sensor location and changed the azimuth but the error has not changed.

--
Jason
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