[Stoves] Flamestover TEG device

[Ronal W. Larson]

David,  cc list

	I have been meaning to get more deeply into fuel cells for this charger application via stoves.  The oxygen sensors that all modern cars have at least one of were invented by the Bosch company and they are still the main supplier to the auto industry.  Hundreds of models, with the cheapest around $20 at every auto supply store.

	They operate on hydrogen, but aren’t harmed by CO - both of which we have in TLUDs coming out of the fuel bed - along with the needed high temperature (won’t work I think with other types of stoves).  All fuel cells can be high efficiency.  I just haven’t had the time - but plan on a trial at Aprovecho - following ETHOS.

	Same units should also be able to supply information on O2 levels - to try to optimize excess air.

	Love to communicate with anyone on this topic.

Ron


On Dec 27, 2014, at 3:42 PM, David Young <> wrote:

> On Fri, Dec 26, 2014 at 12:44:13AM -0800, Todd Albi wrote:
>> Many of the Smart phones chargers are 5 watts, tablets chargers usually are
>> 10 watts.  The Flamestower is only 2.5 watts and it states 3.1 hours to
>> charge, according to the description.  Sounds a lot like the major
>> complaint of the BioLite Camp stove, that it only generates  2 watts of
>> power the majority of the time, and only when feeding it continually, which
>> results in hours of time required to charge a cell phone with a partial
>> charge.  There are lots of cost effective options available to provide low
>> power options for charging at a fraction of the price.  Hopefully more
>> efficient and powerful designs will be available in the near future.
>> Currently it appears intermittent led lighting is all they are really
>> capable of performing at a very high cost.
> 
> The TEG seems to be the method of choice for electrical generation
> on cook fires, and I'm curious how that came to be.  It seems that
> the stoves we are talking about typically produce about 5kW, and they
> extract less than 1% of that using an exotic and costly component, the
> TEG.  Would some other technology, such as a small steam turbine and
> generator, derive a lot more electrical energy from the same fire?
> I guess that somebody has compared the turbine and TEG, taking into
> account the cost and complexity of manufacture, weight, maintenance
> cost, et cetera, and found that the TEG comes out ahead?
> 
> Thank you for describing the performance of the BioLite Basecamp stove,
> I had wondered about it.
> 
> Dave
> 
> -- 
> David Young
> dyoung at pobox.com    Urbana, IL    (217) 721-9981
> 
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