Here's the Sketchup animation output from the same model with three arrays at 35'6" spacing from 8am - 3pm.
http://www.youtube.com/watch?v=ofBmpk1tQ7Q Jason Szumlanski On Sun, Feb 16, 2014 at 7:26 PM, Jason Szumlanski <ja...@fafcosolar.com>wrote: > I would never present something like this to a customer, but this is just > a quick and dirty estimation based on the criteria given at 48.5N, 85.0W > with the panels oriented to true south and tilted to 35º, ground slope down > to 112.5º azimuth at a slope of 7º. > > The area shown as gray would have shade at some point between the hours of > 8am and 3pm. > > It's not shown in the image, but if you wanted the next array to be > precisely true north from the first, you would need to put it about 35'6" > away to ensure zero shading on the winter solstice. > > I used Canadian Solar CS6P modules at 65.5" x 38.7" with 1" spacing > between panels. > > > Jason Szumlanski > > > > On Sun, Feb 16, 2014 at 5:57 PM, Jason Szumlanski <ja...@fafcosolar.com>wrote: > >> I third the use of Sketchup. I use it every day from design, to >> presentation, to permitting, to construction documents. >> >> Below are links to a few images of a recent 3D model I did. The goal here >> was to have a 10 degree tilt angle and have no shade on the next row on >> December 21 at 9:00am. Turns out I need 1' 9" spacing to do that in Naples, >> FL. >> >> >> http://www.solarsouthwestflorida.com/wp-content/uploads/2014/02/2014-02-16_17-46-16.jpg >> >> http://www.solarsouthwestflorida.com/wp-content/uploads/2014/02/2014-02-16_17-43-22.jpg >> >> http://www.solarsouthwestflorida.com/wp-content/uploads/2014/02/2014-02-16_17-53-19.jpg >> The same concepts can be applied to a sloping surface. In fact, if you >> have a survey, you can trace the contour lines (or get them in CAD >> preferably) and create a pretty precise sloping terrain. >> >> I know Chris already offered to help, but I'd like to take a stab at it, >> too, to see how close our answers are. >> >> >> Jason Szumlanski >> >> Fafco Solar >> >> >> >> >> On Sun, Feb 16, 2014 at 5:11 PM, Mac Lewis <maclew...@gmail.com> wrote: >> >>> I second Chris's suggestion of Sketchup. Its very easy to use and >>> does a great job modeling stuff like this. There is a free version from >>> Google that is more than adequate for this. >>> >>> Good luck. >>> >>> >>> On Sun, Feb 16, 2014 at 3:08 PM, Chris Mason < >>> cometenergysyst...@gmail.com> wrote: >>> >>>> I use Sketchup for these calculations now. It will do real shadows at >>>> any time of any day you want. >>>> If you are not familiar with it, send me the exact Google Earth >>>> coordinates and I will mock something up for you. >>>> >>>> >>>> On Sun, Feb 16, 2014 at 5:35 PM, Bob Clark <bcl...@solar-wind.us>wrote: >>>> >>>>> Wrenches: >>>>> >>>>> I have a customer who wants 40 solar modules on ground mounts (not >>>>> poles) in an area that slopes to the ESE at 7 degrees. Putting these >>>>> modules on one ground mount assembly so that the modules are in a 0 degree >>>>> slope East to West would leave the east end about 20 feet in the air. Not >>>>> acceptable as the customer wants a profile as low as possible for >>>>> aesthetic >>>>> reasons plus the wind can be quite strong on occasion. >>>>> >>>>> So, I am trying to figure out how far apart 5, 8 module sub-arrays >>>>> (landscape orientation 2 E-W by 4 N-S tilted at 35 degrees S from the >>>>> horizontal) would have to be North to South and East to West so that they >>>>> are low profile yet do not shade each other on the winter solstice at 48.5 >>>>> degrees N latitude. These calculations are complicated by the ground >>>>> sloping to the ESE at 7 degrees. >>>>> >>>>> Can anyone point to an online calculator that takes into account the >>>>> slope of the ground? Or can anyone help me with the geometry of this >>>>> situation. I have gone around in circles and thoroughly confused myself. >>>>> >>>>> Thanks in advance. >>>>> >>>>> Bob Clark >>>>> bcl...@solar-wind.us >>>>> >>>>> >>>> >>>> -- >>>> Chris Mason >>>> President, Comet Systems Ltd >>>> www.cometenergysystems.com >>>> Cell: 264.235.5670 >>>> Skype: netconcepts >>>> >>> >>> >>> >>> >>> Mac Lewis >>> >>> >>> >
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