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Topic: arduino dual axis solar tracker (Read 7797 times) previous topic - next topic

AMPS-N



Can some one share me formula evolved in construct Dual axis tracker


Why don't you check out my blog post ?

http://kokoraskostas.blogspot.gr/2013/12/its-solar-tracker-project-with-arduino.html



I checked your blog post. They are saying formulas envolved are not longer'
AMPS


Kostas Kokoras

Well i am not sure if i understood your questions, but i hope i can help you.

You need to calculate the two angles of the sun, azimuth (horizontal) and elevation (vertical). they depend from time (day of the year, time of the day) and the coordinates (longitude, altitude) that you are.

Also you need to measure the angles of the two axes of the tracker (horizontal, vertical). the tracker must face South 180 degrees (for the North Hemisphere).

Every time you calculate new angles, you must turn tracker.

For any further questions please contact me to my email kostas@kokoras.com

AMPS-N

thanks for the reply,

SO i consider  azimuth  angle need to be if tracker will move in horizontal axis, elevation / altitude  angle for the vertical axis.
any other point need to be considered like Seasonal change ,shadow length during coding  while calculations.

DO you know any link which gives information on calculating backtracking algorithms to avoid shadowing,increase efficiency

If i wanna run Nrel code. Which controller is best in arduino.           http://www.nrel.gov/midc/spa/
AMPS

Kostas Kokoras


thanks for the reply,

SO i consider  azimuth  angle need to be if tracker will move in horizontal axis, elevation / altitude  angle for the vertical axis.
any other point need to be considered like Seasonal change ,shadow length during coding  while calculations.

DO you know any link which gives information on calculating backtracking algorithms to avoid shadowing,increase efficiency

If i wanna run Nrel code. Which controller is best in arduino.           http://www.nrel.gov/midc/spa/



I think that when we track sun position based in calculations we don't need to use seasonal correction, cause calculations are based in time and day of the year.

I don't know any backtracking algorithms to avoid shadows. Try to place your trackers where there are no physical shadows, and away from each other.

Nrel code is very accurate, but i dont think its needed for photovoltaic panels solar tracker, since you lose 1% of direct suns power at 8 degrees misalignment.

Keep things simple.

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