Re: Stove efficiency PROLENA Ecostove Photos

["Tom Miles" <tmiles@trmiles.com>]

All,

I've uploaded Rogerio Mirandas pictures of the PROLENA Ecostove to the
Stoves website. Click on the photos to go to the Ecostove page.

http://www.repp.org/discussiongroups/resources/stoves/

Regards,

Tom Miles

----- Original Message -----
From: "Rogerio Miranda" <rmiranda@sdnnic.org.ni>
To: <stoves@crest.org>
Cc: <stoves@crest.org>
Sent: Friday, May 03, 2002 11:24 AM
Subject: Re: Stove efficiency


>
> Hello:
>
> Just to let you know that influenced by Kirk Smith publications, we
PROLEÑA
> began work toward an indoor  smokeless  stove  in 1995 in Honduras. First
> we introduce the plancha to a lorena stove, which women liked very much
due
> its clean feature, however the efficiency suffered a lot.
>
> Thanks to Hurricane Mitch in Honduras (that is the only positive side of
> the hurricane I can see), Trees Water and People  dispatched Aprovecho
> volunteers to honduras to promote rocket stoves, including the master
Larry
> Winiarsky. From their good work, they combined PROLEÑA´s  clean but
> unefficient plancha stove with the great efficient rocket stove burner.
The
> result was a tremendous stove called Justa Stove, with no indoor air
> pollution and 50% less fuelwood consumption in comparation to the plancha
> stove. Furthermore it is a multitask stove. you can cook in small pots, in
> a big pot or cook directly on the plancha. Women in Honduras and Nicaragia
> just love it.
>
> here in Nicaragua we PROLEÑA decide to make this stove portable and
> commercial and we called it the Ecostove. so today we have a manufacture
> plant pumping out  about 100 Ecosotves per month to a free market demand.
> The ecostove has efficiency of about 20% and properly operate has zero
> indoor air pollution, besides allowing multiples cooking tasks. For those
> interested I will be happy to provide a picture, while our web page is
> under construction.
>
> The Ecostove I would say is quite simiar to Piet down draft barbecue.
>
> Best wishes
>
> rogerio
>
>
> At 10:06 p.m. 03/05/02 +1000, Peter Verhaart wrote:
> >At 16:04 2/05/02 -0500, you wrote:
> >>Stovers (and maybe for an ETHOS specialist),
> >>
> >>At 11:54 AM 5/2/02 +1000, Peter Verhaart wrote:
> >>
> >>>Yes but the difference [between a stove that smokes and one that does
> >>>not] could be minimal. This even inspired an Eindhoven professor to
state
> >>>that combustion efficiency was not worth pursuing in cookstove
research.
> >>
> >>Can you or anyone provide a "quotable quote" with full reference for
such
> >>a statement, by that professor or anyone else?
> >
> >It was said in a meeting and was not recorded. In a very narrow sense the
> >man was right. If maximum heat transfer is the goal, then concentrate on
> >convection and damn the smoke.
> >Since I was looking for a way to burn wood with blue flames, I violently
> >disagreed. This was in early 1980.
> >I am still looking.
> >
> >
> >>Because, judging by the responses about this topic, COMBUSTION
efficiency
> >>might not be of much concern at all.
> >
> >It is because, thankfully and in contrast to the early 80's, we now care
> >about the emissions.
> >
> >
> >>3.  Therefore, Juntos gasifier and Rocket and any other
> >>"combustion-chamber-focused" stove are all about the same AS FAR AS
> >>COMBUSTION EFFICIENCY IS CONCERNED.
> >
> >If combustion efficiency is defined as: (thermal energy produced/
> >combustion value), then a similar figure for different stoves would
roughly
> >qualify them as equally polluting.
> >
> >>4.  But the structures around Juntos or Rocket or many other combustion
> >>chambers ARE important for efficiency.  (Is anyone working on
"structure"
> >>as being separate from the combustion chamber?  Is there a "plancha"
> >>specialist in the audience -- who is not married to one of the specific
> >>combustion chamber modes?)
> >
> >For stoves that have no open or hidden agenda to produce charcoal as a
> >fringe benefit, the combustion chambers of the Rocket or the Downdraft
> >stove provide optimal conditions for complete combustion. Downstream from
> >the combustion chamber, structure is important to insure optimal heat
> >transfer to the food being processed (via whatever medium, be it griddle,
> >pan or oven). As soon as a better combustion chamber is discovered, I
will
> >divorce the Downdraft stove.
> >
> >>5.  And do not forget the "cooking practices" variable, which is less
> >>quantitatively scientific and is more subjective and social, and heavily
> >>influences the efficiency of any "cooking station" (with fuel,
combustion
> >>chamber, and structure, as well as cooking practices).
> >
> >A good and versatile wood burning cookstove should be able to accomodate
a
> >large range of cooking practices. People in the industrialised world have
> >to make do with standard mass produced gas or electric cookstoves and
don't
> >seem to have much of a problem. The sticking point is "A good and
versatile
> >woodburning cookstove". At the moment there aint no such animal.
> >
> >>6.  Therefore, in contrast with "COMBUSTION efficiency", can we have
> >>a concept like "heat-CAPTURE efficiency"?
> >>
> >>Please do not forget:
> >>Can you or anyone provide a "quotable quote" with full reference for
such
> >>a statement about combustion efficiency NOT meriting attention for small
> >>stove research or concern, by that professor or anyone else?
> >
> >Such a quote should be ignored or used to shoot or at least fire that
person.
> >
> >>Or maybe YOU want to provide such a statement to the Stoves list with
the
> >>intention that the rest of us can quote YOU as stating that "combustion
> >>efficiency" (as clearly defined by YOU) is not sufficiently important to
> >>merit much attention.
> >
> >I think I have clarified the matter.
> >
> >Smiling back,
> >
> >Piet
> >
> >
> >-
> >Stoves List Archives and Website:
> >http://www.crest.org/discussion/stoves/200204/
> >http://crest.org/discussiongroups/resources/stoves/
> >>
> >Stoves List Moderators:
> >Ron Larson, ronallarson@qwest.net
> >Elsen L. Karstad, elk@wananchi.com www.chardust.com
> >>
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> >>
> >Sponsor the Stoves List: http://www.crest.org/discuss3.html
> >-
> >Other Biomass Stoves Events and Information:
> >http://www.bioenergy2002.org
> >http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy
> >http://www.crest.org/articles/static/1/1011975339_7.html Gasification
> >http://www.crest.org/articles/static/1/1011975672_7.html Carbon
> >>
> >For information about CHAMBERS STOVES
>
>>http://www.repp.org/discussiongroups/resources/stoves/Chambers/Chambers.ht
m
> >
> >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
> 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
>                 <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
>
> -
> Stoves List Archives and Website:
> http://www.crest.org/discussion/stoves/200204/
> http://crest.org/discussiongroups/resources/stoves/
> >
> Stoves List Moderators:
> Ron Larson, ronallarson@qwest.net
> Elsen L. Karstad, elk@wananchi.com www.chardust.com
> >
> List-Post: <mailto:stoves@crest.org>
> List-Help: <mailto:stoves-help@crest.org>
> List-Unsubscribe: <mailto:stoves-unsubscribe@crest.org>
> List-Subscribe: <mailto:stoves-subscribe@crest.org>
> >
> Sponsor the Stoves List: http://www.crest.org/discuss3.html
> -
> Other Biomass Stoves Events and Information:
> http://www.bioenergy2002.org
> http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy
> http://www.crest.org/articles/static/1/1011975339_7.html Gasification
> http://www.crest.org/articles/static/1/1011975672_7.html Carbon
> >
> For information about CHAMBERS STOVES
>
>http://www.repp.org/discussiongroups/resources/stoves/Chambers/Chambers.htm
>



-
Stoves List Archives and Website:
http://www.crest.org/discussion/stoves/200204/
http://crest.org/discussiongroups/resources/stoves/
>
Stoves List Moderators:
Ron Larson, ronallarson@qwest.net
Elsen L. Karstad, elk@wananchi.com www.chardust.com
>
List-Post: <mailto:stoves@crest.org>
List-Help: <mailto:stoves-help@crest.org>
List-Unsubscribe: <mailto:stoves-unsubscribe@crest.org>
List-Subscribe: <mailto:stoves-subscribe@crest.org>
>
Sponsor the Stoves List: http://www.crest.org/discuss3.html
-
Other Biomass Stoves Events and Information:
http://www.bioenergy2002.org
http://www.crest.org/articles/static/1/1010424940_7.html Bioenergy
http://www.crest.org/articles/static/1/1011975339_7.html Gasification
http://www.crest.org/articles/static/1/1011975672_7.html Carbon
>
For information about CHAMBERS STOVES
>http://www.repp.org/discussiongroups/resources/stoves/Chambers/Chambers.htm