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I watched this video this morning and went on an imagination journey of how to harness the most heat from this concept:
-would copper pipe or flat bar absorb the most heat.
-Would completing a full loop over the entire surface of the magnets be effective.
-Bar/pipe above and below the magnets to double the power?
-Could this be submerged in a hot water cylinder and driven externally? Or would you need a connected rod to go through the cylinder. (Barings through a how water cylinder would be a challenge)
-How efficient is this in terms of converting kinetic energy, in comparison to an alternator driving a heat pump.
If you can harness the wind, like they seem to have enough of in Ireland, I guess it could be cost-effective. A windmill may be overkill, but some kind of "vertical propeller" (how are they called?) may be enough.
OTOH, a windmill would be a great toy to play with, so I can understand his wish 😀