Solar-powered home-built Stirling engine

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I designed my little testbed engine so it can be inverted and heated from above, and I finally got the opportunity to try it out using solar energy.

I had an old Fresnel lens from a large screen TV that I mounted in a frame and then put the engine hot end at the focus. I was pleased to see that it runs very well, over 1,000 rpm.

Features of the engine: wood frame, ball bearing crank, $1 water bottle cylinder, tuna can cooling jacket, inner tube and PVC power diaphragm, stainless steel wool moving regenerator. Cooling water provided by tiny submersible pump from Harbor Freight. Stay tuned – next generation engine coming soon. This one has about served its purpose.

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