Seeking Stirling engine fan for low temp/differential
January 1, 2021 8:44 AM   Subscribe
I would like to get some fans to circulate air around my radiators to facilitate heat transfer and distribution. Can you help me find something like this I can order online?

I can find stirling engine fans designed for stoves like these, but I don't think any of them will work at around 110-120F where I try to keep my water-filled radiators. I can find low temp/differential demonstration engines like these, but I'm not sure I can easily modify that to drive a fan.

I don't need much speed/torque, and from experimenting even minimal air moving is very effective. I suppose I can do this with small electric fans but it would be really nice to run it off the radiator heat! Thanks for any suggestions.
posted by SaltySalticid to Grab Bag (3 answers total) 3 users marked this as a favorite
 
I think you probably want small electric fans driven by peltier junctions, like they sell for wood stoves. Stiring engines are super cool, but you can get the parts for a peltier-powered rig and DIY pretty easily. I'm not sure what heat differential is needed, but the one I got my parents for their wood stove starts spinning at a fairly low temperature.
posted by hades at 9:09 AM on January 1 [1 favorite]


For example: this instructable
posted by hades at 9:16 AM on January 1 [2 favorites]


I can find low temp/differential demonstration engines like these, but I'm not sure I can easily modify that to drive a fan女王的骑兵女王的骑兵,钻石i色钻石i色,渡辺茜资料渡辺茜资料

The one you linked looks pretty easy to modify so that the flywheel is a fan, just by adding some tabs to the spokes. You could experiment with blade size, design and angle just by cutting tabs from manila folder cardboard and taping them on with sticky tape; once you've got a blade design that moves as much air as possible without actually stopping the motor, make somewhat more robust versions from thin sheet metal and glue them to the spokes with epoxy or cyanoacrylate.
posted by flabdablet at 4:59 AM on January 2 [1 favorite]


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