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<div class="moz-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 type="cite"><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="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>
<br>
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