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Old 07-11-2006   #1 (permalink)
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SolarFreak
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Okinawa
 
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building a parabolic with mirrors.

I’m building a parabolic reflector this coming weekend. I will be using 2in^2 mirrors.

I’m trying to calc the power output and what temperature will be at the focal point. My 1st goal is to reach 500f.

And will be using a 2in^2 mirrors, I’m also trying to calc the optimal focal point of the mirrors.

The sun is about .5 deg wide at the earth so, I can find what the max focal length would be before blurring of the reflected sun would be.
a 2 inch mirror max focal is 19 feet
(2 / tan(.5)) / 12

So far this is my estimated output power per row of mirrors.
http://forum.teamfc3s.org/parabola/output.php
Is my estimated power output correct?

A question about solar constant: 1366 ~ 1370 W/M^2 above the atmosphere and 1000W/M^2 on the ground at noon.

How do I calculate what my solar constant would be at my location?
Latitude: 26° 10' North
Longitude: 127° 40' East

I will post some pictures of the project this weekend.

Im also interested in building a 2 axis tracker for this reflector.
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