Sounds like a great opportunity for an Elecraft-branded Stirling engine turning a small fan:
https://youtu.be/Qshc2yWKq2AJohn AE5X
http://ae5x.blogspot.com/
Usually the situation where people do
> not use fans is when they are operating portable and don't want to
> waste the power or have extra stuff to pack/set up
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Police Urge Americans to Carry This With Them at All Times
The Observer
http://thirdpartyoffers.juno.com/TGL3131/5949c037661ea40372c42st04vuc______________________________________________________________
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