Re: Fw: steam fan

[Rogerio Miranda <rmiranda@sdnnic.org.ni>]

I agree with Larry, traiining on woodstove use in LDC is very important. We
are trying to make  a stove  technological transition from the fire age to
the XX1 century in just few days with low educated people, so training and
follow up is crucial.

rogerio

At 10:10 a.m. 13/05/01 -0700, Dean Still wrote:
>
>Dear Stovers,
>
>Regarding steam driven fans: I thought that Dr Winiarski might want to
>comment since he has been playing with fans for years. He writes that while
>different sorts of steam driven fans work in the lab none have yet been
>developed to the point where the required ruggedness is met.
>
>Best,
>
>Dean Still
>Aprovechp
>www.efn.org/~apro
>
>
>
>>Hi Dean,
>>
>>Thanks for this opportunity to enter the discussion on the steam powered
>>fan. For years I have believed the it has a niche in the cookstove world.
>>The simple models(hero or impulse) that we have made are ok for laboratory
>>experiments, but we need to make more rugged designs cheaply that the cook
>>does not have to be so carefull about breaking or clogging.  I think it
>>would be unwise to promote a prototype that simply will not last in actual
>>use.
>>
>>Our field experience in developing countries shows that getting even our
>most
>>simple stove made and used properly requires a lot of training and follow
>>up and research for alternative materials, etc.
>>
>>There are also times when one does not want a fan assist. Too much air will
>>cool the fire, depending on the amount and type of fuel.  The cook may also
>>want to keep the stove barely lit to make it easier to start up again or
>>may only want  to keep things warm.
>>
>>I am working on simple, more rugged steam fans but think we should give
>>higher priority  to the ongoing stove work.
>>
>>Unless one has actual experience,  I believe those of us working in a
>>laboratory or shop in the developed world have difficulty fully
>comprehending the importance
>>of ruggedness and simplicity in introducing technology to the poor in
>>developing countries.
>
> God Bless.
>>
>>Dr. Larry Winiarski
>Technical Director
>Aprovecho
>>
>
>
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>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
			Rogério Carneiro de Miranda
			Director, Ecofogones y Reposición Forestal
			PROLEÑA/Nicaragua
			Apartado Postal C-321 
			Managua, Nicaragua
			TELEFAX (505) 249 0116
			EMAIL: rmiranda@sdnnic.org.ni
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