[RE-wrenches] Array tilt angle doesn't matter?

[Tom Elliot]

Hmmm, I guess there could be a factor that enters into it due to the curvature of the earth but the difference between the tropics of Cancer and Capricorn, the extent of relative solar movement, is 47 degrees and that’s not about to change.

From: Dave Palumbo 
Sent: Tuesday, February 22, 2011 3:51 PM
To: 'RE-wrenches' 
Subject: Re: [RE-wrenches] Array tilt angle doesn't matter?

Tom,

 

This is coming from old memory, so I give this with a grain of salt, but I believe the noontime sun angle at my latitude (44.5) is about 78 degrees on June 21st and about 22 degrees on December 21st. That’s a difference of 56 degrees.

 

David Palumbo

Independent Power LLC 

462 Solar Way Drive

Hyde Park, VT 05655

www.independentpowerllc.com 

NABCEP Certified PV Installer

Vermont Solar Partner

23 Years Experience, (802) 888-7194 

 

 

 

From: re-wrenches-bounces at lists.re-wrenches.org [mailto:re-wrenches-bounces at lists.re-wrenches.org] On Behalf Of Tom Elliot
Sent: Tuesday, February 22, 2011 7:46 PM
To: RE-wrenches
Subject: Re: [RE-wrenches] Array tilt angle doesn't matter?

 

 

“The further north you go the wider the summer to winter sun angle.”

 

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.

 

Tom

 

 

 



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