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<font size=3>David:<br><br>
Here is a handy site:
<a href="http://www.susdesign.com/sunangle/" eudora="autourl">http://www.susdesign.com/sunangle/</a><br><br>
Put in the information from your neighborhood for winter and summer
solstice and get back to us on the difference.<br><br>
In my neighborhood, the sun altitude angle at noon on winter solstice is
about 31.6 degrees. On summer solstice at noon (not corrected for
DST) the sun altitude angle is 78.4 degrees. The difference is 46.8
degrees.<br><br>
I realize that solar noon is slightly different from clock noon, but the
answers you get at clock noon should be very close to correct for solar
noon.<br><br>
William Miller<br><br>
<br><br>
At 05:51 PM 2/22/2011, you wrote:<br>
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Tom,<br>
<br>
This is coming from old memory, so I give this with a grain of salt, but
I believe the <u>noontime sun angle</u> at my latitude (44.5) is about 78
degrees on June 21<sup>st</sup> and about 22 degrees on December 21st.
That\u2019s a difference of 56 degrees.<br>
<br>
David Palumbo<br>
Independent Power LLC <br>
462 Solar Way Drive<br>
Hyde Park, VT 05655<br>
<b><i><a href="http://www.independentpowerllc.com/" eudora="autourl">www.independentpowerllc.com</a>
<br>
</i></b>NABCEP Certified PV Installer<br>
Vermont Solar Partner<br>
23 Years Experience, (802) 888-7194 <br>
<br>
<br>
<br>
<b>From:</b> re-wrenches-bounces@lists.re-wrenches.org [<a href="mailto:re-wrenches-bounces@lists.re-wrenches.org" eudora="autourl">mailto:re-wrenches-bounces@lists.re-wrenches.org</a>] <b>On Behalf Of </b>Tom Elliot<br>
<b>Sent:</b> Tuesday, February 22, 2011 7:46 PM<br>
<b>To:</b> RE-wrenches<br>
<b>Subject:</b> Re: [RE-wrenches] Array tilt angle doesn't matter?<br>
<br>
<br>
\u201cThe further north you go the wider the summer to winter sun angle.\u201d<br>
<br>
Bob-O. Explain this one to me please. The difference between winter solstice and summer solstice sun angle is 47 degrees, everywhere on the planet, even in Hawaii. I suspect that in higher latitudes a lower sun angle means more atmosphere to affect insolation but the planet, last time I checked, is tilted the same everywhere.<br>
<br>
Tom<br>
<br>
<br>
<br>
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<u>Please note new e-mail address and domain:<br><br>
</u>William Miller <br>
Miller Solar<br>
Voice :805-438-5600<br>
email: william@millersolar.com<br>
<a href="http://millersolar.com/" eudora="autourl">http://millersolar.com<br>
</a>License No. C-10-773985<br>
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