Myron,
I just stumbled on this site. I think that is a great idea! As others pointed out one could go with TEGs, off the shelf, no moving parts but at a cost to efficiency. One might go with something like a Tesla turbine or other turbine which might even be more efficient than the Stirling motor, but you would need steam to drive the rotor. I have read that Stirling motors are efficient but am used to seeing them only as novelty items for a coffee table. If there is either an off the shelf solution or one could build without great difficulty a Stirling motor that produced more power than a coffee table novelty, that scales, as I said, that's a winner. I have just started reading and I get it, rocket stoves/masonry stoves are a better deal. that said such a Stirling engine could go on every wood stove in the world. Not joking, you should start a crowd sourced, go fund me, or whatever they call it, if you don't in six months or less I might! For the cost of having moving parts, and who doesn't like a conversation piece on the hearth, you could have something 5-10x more efficient than TEGs for producing electricity and people already market TEGs for this.
