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<div class="moz-cite-prefix">Dear Otto and Crispin,<br>
<br>
Thank you both for your responses. The "numbers people" will
need to address Crispin's comments.<br>
<br>
Otto, I am quite sure that the stove was an Anila, with pyrolysis
of the biomass in the outer annulus. <br>
<br>
I do not know about ICRAF in Kenya except what Google searching
shows.<br>
<br>
Paul<br>
<pre class="moz-signature" cols="72">Paul S. Anderson, PhD aka "Dr TLUD"
Email: <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> Skype: paultlud Phone: +1-309-452-7072
Website: <a class="moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
On 4/24/2013 1:37 PM, Otto Formo wrote:<br>
</div>
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<div dir="ltr">Dear Paul,
<div><br>
</div>
<div>Very usefull information, thanks.</div>
<div><br>
</div>
<div>Do you happend to know what type of pyrolytic gasifiers
they were using in Western Kenya?</div>
<div><br>
</div>
<div>Do you have any contact point or information about ICRAF in
Nairobi?</div>
<div><br>
</div>
<div>Otto <br>
<br>
<div>
<hr id="stopSpelling">Date: Wed, 24 Apr 2013 13:27:46 -0500<br>
From: <a class="moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a><br>
To: <a class="moz-txt-link-abbreviated" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br>
CC: <a class="moz-txt-link-abbreviated" href="mailto:biochar@yahoogroups.com">biochar@yahoogroups.com</a><br>
Subject: [Stoves] Energy / fuel / biochar DATA from Kenya
Re: FW: REQUEST for complete sets of raw data of cookstove
tests.<br>
<br>
<div class="ecxmoz-cite-prefix">Dear Stovers who want truth
in reporting about stove efficiency.<br>
<br>
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).<br>
<br>
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.<br>
<br>
Paul<br>
<blockquote><br>
"Biomass availability, energy consumption and biochar
production in rural households of Western Kenya"<br>
<u>Biomass and Bioenergy</u> Vol 35 (2011) pp.3537-3546<br>
Dorisel Torres-Rojas a, Johannes Lehmann a,*, Peter
Hobbs a, Stephen Joseph b,<br>
Henry Neufeldt c<br>
a Department of Crop and Soil Sciences, Cornell
University, 9090 Bradfield Hall, Ithaca, NY 14853, USA<br>
b University of South Wales, NSW 2052, Australia<br>
c World Agroforestry Center (ICRAF), Nairobi, Kenya<br>
<br>
Abstract<br>
Pyrolytic cook stoves in smallholder farms may require
different biomass supply than<br>
traditional bioenergy approaches. Therefore, we carried
out an on-farm assessment of the<br>
energy consumption for food preparation, the biomass
availability relevant to conventional<br>
and pyrolytic cook stoves, and the potential biochar
generation in rural households of<br>
western Kenya. Biomass availability for pyrolysis varied
widely from 0.7 to 12.4 Mg ha1 y1<br>
with an average of 4.3 Mg ha1 y1, across all 50 studied
farms. Farms with high soil fertility<br>
that were recently converted to agriculture from forest
had the highest variability<br>
(CV ¼ 83%), which was a result of the wide range of farm
sizes and feedstock types in the<br>
farms. Biomass variability was two times lower for farms
with low than high soil fertility<br>
(CV ¼ 37%). The reduction in variability is a direct
consequence of the soil quality, coupled<br>
with farm size and feedstock type. The total wood energy
available in the farms (5.3 GJ<br>
capita1 y1) was not sufficient to meet the current
cooking energy needs using conventional<br>
combustion stoves, but may be sufficient for improved
combustion stoves depending<br>
on their energy efficiency. However, the biomass that is
usable in pyrolytic cook stoves<br>
including crop residues, shrub and tree litter can
provide 17.2 GJ capita1 y1 of energy for<br>
cooking, which is well above the current average cooking
energy consumption of 10.5 GJ<br>
capita1 y1. The introduction of a first-generation
pyrolytic cook stove reduced wood<br>
energy consumption by 27% while producing an average of
0.46 Mg ha-1 y-1 of biochar.</blockquote>
<br>
<pre class="ecxmoz-signature">Paul S. Anderson, PhD aka "Dr TLUD"
Email: <a moz-do-not-send="true" class="ecxmoz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a> Skype: paultlud Phone: +1-309-452-7072
Website: <a moz-do-not-send="true" class="ecxmoz-txt-link-abbreviated" href="http://www.drtlud.com" target="_blank">www.drtlud.com</a></pre>
<br>
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