Joel:
Each row is two SW175 modules, portrait, two rows high. The tilt angle is
30 degrees. The rows are 9'6-1/2" center to center.
Truthfully, I drew these at random to test my trig.
Wm
At 05:54 PM 5/12/2009, you wrote:
William,
Very impressive! What is the height of the back of the south array? What
is the distance between the back of the south array and front of the array
behind it?
Joel Davidson
----- Original Message -----
From: <mailto:[email protected]>William Miller
To: <mailto:[email protected]>RE-wrenches
Sent: Monday, May 11, 2009 11:57 PM
Subject: [RE-wrenches] Shading animations
Joel:
My understanding is that you wish to calculate inter-row spacing for
non-south facing arrays. I modeled an example of this scenario in 3D
over a time period and created a video file. I converted the
aforementioned 97 MB file to a WMV and trimmed the file size just a
little (to ~436 KB). The file can be found
at: http://millersolar.com/case_studies/case_studies.html Click on
Shading Study.
I modeled two identical, two row installations. One is facing due south,
one is 45 degrees east of south. The modeling date is winter solstice
and the time period is from 8:00 AM to 4:00 PM. The location is right
here in sunny San Luis Obispo County.
If you get a chance to view the animation, you will note that the
inter-row shading is not significantly different between the south facing
rows and the non-south facing rows. One might even decide that the
solution for a south facing installation is an adequate solution for any
installation where all other parameters are equal. I will verify this
mathematically (in my free time).
Thanks for the question. I love thinking about these problems. (Tell
the kids that the math is actually useful.)
William Miller
PS: The animation was created in Microstation, saved as an AVI and
converted to a WMV file in Pinnacle Studio. I apologize that the
resolution is not great -- I am still learning the software, even after
all these years.
Wm
At 06:28 PM 5/11/2009, you wrote:
Ken,
Thank you. This website and software gives the sun altitude and azimuth.
I seem to recall 3D graphic dynamic software where you input the site
longitude and latitude, solar panel tilt angle and the north side height
and the result would be a shade pattern shown for each hour. Does anyone
have such a program?
Best regards,
Joel Davidson
----- Original Message -----
From: <mailto:[email protected]>Engineering Services Co.
To: <mailto:[email protected]>RE-wrenches
Sent: Monday, May 11, 2009 11:14 AM
Subject: Re: [RE-wrenches] Spacing between solar arrays
Try this Joel.
<http://www.susdesign.com/>http://www.susdesign.com/
Ken Hulet
Engineering Services Co.
204 S. Main St.
Blanchardville, WI 53516
608.523.3726
<http://www.revolutionearth.com>http://www.revolutionearth.com
visit us at River Valley Trading Co.
<http://www.rivervalleytrading.com>http://www.rivervalleytrading.com
On May 11, 2009, at 11:39 AM, Joel Davidson wrote:
Wrenches,
Someone posted a website or calculation for determining the spacing
between solar arrays, but I can not find it. It is easy to get the
spacing from a drawing when the array faces true south, but when the
array faces southeast or southwest is what we need to know. Please
help. Thank you very much.
Joel Davidson
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