Warpfive Stirling engine fans for wood stoves

[dognose]

I was reading about firewood since I cut a serious amount of firewood through the year. I cut trees and for firewood 2 or 3 times a week right now. Almost every day I split logs, often for an hour, during my lunch hour since I work from home most days.

I don't have a fan for my woodstove as it has a decent output now but have thought about getting one for those extreme cold times during the winter.

I saw this fan and thought "wow, that one I really like". They are not cheap but wow, it would be worth it.

Warpfive fans are small precision engineered Stirling engines, which are 100% mechanical and do not have any electric components which may stop working if overheated. Consequently, they are extremely reliable and with care will last a lifetime. Reverend Robert Stirling of Scotland invented the Stirling engine in 1816.

Stirling engines work by moving a sealed volume of air from the hot base to a cool top plate. The air is rapidly heated and cooled as it moves from the cool top plate to the hot base. The warm air expands and causes the piston to push up. While the cool top plate rapidly cools the air and causes it to contract. This results in a vacuum which pulls the piston down. The same volume of air is rapidly heated and cooled many times per second, extracting energy for the engine to work.

Check them out here https://warpfivefans.com/

Here is a utube video on the fan

 

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[Kray Gelder]

Pretty cool. I just ran across Peltier thermoelectric plates. Semi-conductor devices that when heated on one side while being cooled on the other produce electricity. If you could figure out how to do that, you could charge a battery with it to drive a fan. Maybe the product is already out there for a wood stove. No moving parts.