[Estufas_bioenergylists.org] more briquette press options if you need them

[Fernando Martirena]

Dear Richard

Many thanks for your comments regarding different types of biomass presses.

In fact, we have certainly been connected to the stoves list, however I 
cannot say that we are the ones that participate the most. We have started 
back in 1998 with our "solid fuel block", that is, a briquette bound with 
clay, based on the principle of using the clay to bind the shredded biomass 
and using the ash resulting from firing the clay (mainly for brick firing, 
at temperatures around 900 C), as an activated (calcined) clay with high 
pozzolanic activity, also linked to our work on pozzolanic binders (for 
further details please see www.ecosur.org) . Most of the ideas have been 
published at the stove's website, please ask Tom Miles for tips to locate 
them. At present we have seven workshops where this technology is used at a 
semi-commercial level (in Cuba it'd be difficult to talk of full 
commercial), and the results are so far encouraging... we are also studying 
together with Prof. Karen Scrivener from EPFL, Lausanne, Switzerland the 
best firing conditions in order to get a fully activated clay.

Yes, indeed, there are many interesting designs for manually operated 
presses, and we look forward to receiving informations on the designs, in 
order to assess whether they could be useful for our SFB manufacture, for we 
are also machine manufacturers and we tap the market of many of our social 
projects in Cuba and in developing countries, and we could eventually 
organize serial manufacture of some improved models. Ivan Machado, who is 
one of my PhD students will certainly follow this up with you.

Thanks again for your contact and look forward to keeping in touch

sincerely

fernando martirena


----- Original Message ----- 
From: "rstanley" <rstanley en mind.net>
To: "Cocinas y Estufas Mejoradas" <estufas en bioenergylists.org>
Sent: Tuesday, February 13, 2007 11:57 AM
Subject: Re: [Estufas_bioenergylists.org] more briquette press options if 
you need them


> Estimado, Ivan and David et al,
> There are many many press designs you should be aware of besides Dr
> MArtirena's. Screw presses from Malawi, batch down-fed, lever presses from
> Thailand, Mozambique, Peru, Kenya, Mexico,  and Nepal, down-fed.
> continuous-fed designs from Uganda, slide tray horizonal-fed designs form
> Nepal again, hopper fed foot-operated stepper press for pellet making from
> South africa, Hydraulic horizonatal and vertical fed designs from Haiti
> etc....
> Not that anything is wrong with Dr Martirena's design, (I do not think he 
> is
> connected to our network) but perhaps you can benefit from a broader 
> serioes
> of options for your specific situation. We can send you several examples
> form around the world to give you perhpas a broader decision making base.
> (We sell plans and operating instructions for our hand operated compound
> lever wood press for up to 6 persons, a hand operated lever "Porta press"
> for small production teams (1 - 2 persons),
> We have diagrams for a stepper press and a hydraulic jack-operated up-fed
> press which we give out for free as long as you agree to (1)feed back to 
> us
> your exerience and recommendations with it, and (2) agree to freely pass 
> it
> on to others) but us aside, there is really much much more out there in 
> the
> low pressure, wet process briquetmaking world.
> Let us know if you want additional options...then please guide us with 
> your
> experience !
> Richard Stanley
> <www.legacyfound.org>
> =======================
>
> [iso-8859-1] Ivan Machado L�pez writes:
>
>> David W
>>
>> Considero muy importante el tema del evento que su entidad organizará en 
>> Marzo en Bolivia, nuestro equipo de trabajo dirigido por el Dr José F. 
>> Martirena ha trabajado el tema de la biomasa densificada con baja energía 
>> de compactación como una alternativa de combustible con adecuada densidad 
>> energética que puede tener un uso muy satisfactorio en las cocinas 
>> mejoradas con un bajo impacto medio ambiental.
>>
>> Mi nombre es Iván Machado López y trabajo en el Centro de Investigaciones 
>> y Desarrollo de las Estructuras y los Materiales, CIDEM,  y nos sería de 
>> mucho interés ver que participación podríamos tener en este evento.
>>
>> En espera de su atención lo saludo
>>
>> Ing. Iván Machado López
>>
>>
>
> _______________________________________________
> Estufas_bioenergylists.org mailing list
> Estufas_bioenergylists.org en bioenergylists.org
> http://www.bioenergylists.org/mailman/listinfo/estufas_bioenergylists.org
> http://www.bioenergylists.org/es
>