This is a larger Stirling engine powered by concentrated solar is water cooled. It has a 12v DC Permanent Magnet motor operating fixed as the flywheel bearing and is powered by a large 36" Parabolic Mirror.
http://www.greenpowerscience.com/SHOPHOME.html
It produces 15 Volt max with NO LOAD. This setup as is produces about 15 watts. The heat sink is a water cooled tank that is a bit short for the displacement piston but does work. I will be adding some heat sinks soon and testing it with the 56 inch dis
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