[Stoves] Energy / fuel / biochar DATA from Kenya Re: FW: REQUEST for complete sets of raw data of cookstove tests.

[Paul Anderson]

Dear Otto and Crispin,

Thank you both for your responses.   The "numbers people" will need to 
address Crispin's comments.

Otto, I am quite sure that the stove was an Anila, with pyrolysis of the 
biomass in the outer annulus.

I do not know about ICRAF in Kenya except what Google searching shows.

Paul

Paul S. Anderson, PhD  aka "Dr TLUD"
Email:  psanders at ilstu.edu   Skype: paultlud  Phone: +1-309-452-7072
Website:  www.drtlud.com

On 4/24/2013 1:37 PM, Otto Formo wrote:
> Dear Paul,
>
> Very usefull information, thanks.
>
> Do you happend to know what type of pyrolytic gasifiers they were 
> using in Western Kenya?
>
> Do you have any contact point or information about ICRAF in Nairobi?
>
> Otto
>
> ------------------------------------------------------------------------
> Date: Wed, 24 Apr 2013 13:27:46 -0500
> From: psanders at ilstu.edu
> To: stoves at lists.bioenergylists.org
> CC: biochar at yahoogroups.com
> Subject: [Stoves] Energy / fuel / biochar DATA from Kenya Re: FW: 
> REQUEST for complete sets of raw data of cookstove tests.
>
> Dear Stovers who want truth in reporting about stove efficiency.
>
> The title and abstract below seem to be a good example to illustrate 
> what happens when stoves can use fuels other than wood and can produce 
> charcoal (for burning or for biochar).
>
> This is not my data, and not my stove design.   How do we get this 
> type of "stove IMPACT" included into stove testing?   I think the word 
> IMPACT can carry the same weight as efficiency.   "ENERGY efficiency" 
> should be reported.    "Fuel impact" might be an additional result to 
> report.
>
> Paul
>
>
>     "Biomass availability, energy consumption and biochar production
>     in rural households of Western Kenya"
>     _Biomass and Bioenergy_ Vol 35 (2011) pp.3537-3546
>     Dorisel Torres-Rojas a, Johannes Lehmann a,*, Peter Hobbs a,
>     Stephen Joseph b,
>     Henry Neufeldt c
>     a Department of Crop and Soil Sciences, Cornell University, 9090
>     Bradfield Hall, Ithaca, NY 14853, USA
>     b University of South Wales, NSW 2052, Australia
>     c World Agroforestry Center (ICRAF), Nairobi, Kenya
>
>     Abstract
>     Pyrolytic cook stoves in smallholder farms may require different
>     biomass supply than
>     traditional bioenergy approaches. Therefore, we carried out an
>     on-farm assessment of the
>     energy consumption for food preparation, the biomass availability
>     relevant to conventional
>     and pyrolytic cook stoves, and the potential biochar generation in
>     rural households of
>     western Kenya. Biomass availability for pyrolysis varied widely
>     from 0.7 to 12.4 Mg ha1 y1
>     with an average of 4.3 Mg ha1 y1, across all 50 studied farms.
>     Farms with high soil fertility
>     that were recently converted to agriculture from forest had the
>     highest variability
>     (CV ¼ 83%), which was a result of the wide range of farm sizes and
>     feedstock types in the
>     farms. Biomass variability was two times lower for farms with low
>     than high soil fertility
>     (CV ¼ 37%). The reduction in variability is a direct consequence
>     of the soil quality, coupled
>     with farm size and feedstock type. The total wood energy available
>     in the farms (5.3 GJ
>     capita1 y1) was not sufficient to meet the current cooking energy
>     needs using conventional
>     combustion stoves, but may be sufficient for improved combustion
>     stoves depending
>     on their energy efficiency. However, the biomass that is usable in
>     pyrolytic cook stoves
>     including crop residues, shrub and tree litter can provide 17.2 GJ
>     capita1 y1 of energy for
>     cooking, which is well above the current average cooking energy
>     consumption of 10.5 GJ
>     capita1 y1. The introduction of a first-generation pyrolytic cook
>     stove reduced wood
>     energy consumption by 27% while producing an average of 0.46 Mg
>     ha-1 y-1 of biochar.
>
>
> Paul S. Anderson, PhD  aka "Dr TLUD"
> Email:psanders at ilstu.edu  <mailto:psanders at ilstu.edu>    Skype: paultlud  Phone: +1-309-452-7072
> Website:www.drtlud.com  <http://www.drtlud.com>
>
>
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