[Stoves] Hybrid cooking-stoves: solar+fuel?

[Thomas Reed]

Dear Martin:

Your instinct to recover waste heat is admirable.  However, the 
viscosity of gases rises (T^1/2?) with temperature, so you will have 
more trouble mixing hot air with hot gas...

Good Luck,  and report progress...

TOM REED           BEF

Boll, Martin Dr. wrote:
> Dear Crispin,
>
> Since sometime, I am thinking how to pre-warm primary and secondary-air, in
> order to get a better blow without fan.
>
> One idea was, to pre-warm air in a concentrating solar-trough, or just by a
> mass with black surface, possibly covered with glass.
>
> The second step in reflecting then is:
>
>  
>
>  Why do we not think of hybrid-cooking-stoves: combined solar-fuel-stoves? (
> whatever fuel)
>
>  
>
> In a certain time before starting the fuel-stove, solar heat-collection
> could be done in advance, so the fuel-stove could run with less fuel, but
> getting a powerful output. The power of the solar-collector I guess can be
> between 300 and 1500W.
>
> Advantage was: quickly speeding up the fire and simmering by collected
> sun-energy. Cooking would work by different weather-conditions, not only by
> sunshine.
>
> Was it worth to try a bigger-scale simple pre-warming of air for your
> Libhubesi-stove?
>
>  
>
> Regards
>
>  
>
>  
>
> Martin
>
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