Sand battery - video

[mklotz]

complete and utter BS.

This is not a battery, this is a heat engine (looks like a Stirling engine), nothing more, sitting on a higher temperature source (the sand heated on the stove) and it converts heat into motion.

Worst is the BS in the comments on yt where folks are amazed at this invention and how great it is for the future of mankind.

One step below a perpetual motion machine. Utter and complete nonsense.

While I concur with the BS remark, it's not a Stirling engine. Although Stirling engines have been used in that capacity (the Brits in India used a version powered by their kerosene lamps to create a bit of air movement), this one is powered by an electronic device that employs the Seebeck effect...

https://en.wikipedia.org/wiki/Thermoelectric_generator

to generate a current that powers a small electric motor that rotates the fan.

You can buy the fans on Amazon...

https://www.amazon.com/s?k=thermoele...s_ts-doa-p_1_9

or just the thermoelectric device and a motor...

https://www.amazon.com/s?k=thermoele..._ts-doa-p_1_19

to make your own.

I've built a number of Stirling engines; this one runs just as well on ice as on coffee cup heat...

LTD Stirling running on ice