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<div dir="ltr">Dear Paul and Huck,<br> <br>I find this issue a bit od and out of "topic".<br>Why is suddenly WOOD such a "hot topic", when the most interesting part is FUEL, Solid or Liquid from any type of biomass?<br> <br>Producing charcoal or any other liquid fuel, you can not SKIP the processing part, consuming energy as well.<br>This is also called a "Life circle" for a product (biomass fuel) - see energy forestry.<br> <br>Gasifier units; read<br>"<strong>Micro Kilns"</strong>, utilizing the charcoal from wood or any other dry biomass for cooking, will be more energy and fuel efficient, compared to traditional made charcoal.<br> <br><strong>Because</strong> you are utillizing the energy content in the biomass for cooking, while producing charcoal, wheter you test the other way or another. <br></div><div dir="ltr">Have a Nice day. <br> <br>Otto<br> <br></div><div dir="ltr"><hr id="stopSpelling">Date: Mon, 15 Sep 2014 23:25:02 -0500<br>From: psanders@ilstu.edu<br>To: stoves@lists.bioenergylists.org<br>Subject: Re: [Stoves] cook stoves for Cameroon<br><br>
<div class="ecxmoz-cite-prefix">Huck,<br>
<br>
Crispin wrote:<br>
<blockquote><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Thus ‘gasifiers’ are getting rated as if they do
not consume fuel that is actually consumed.</span></blockquote>
Crispin's point is that wood that is turned into charcoal is no
longer wood. THAT is true. But there are two ways to state
the efficiency: Fuel efficiency and Energy efficiency.
Charcoal that is created is no longer wood. But it is a fuel
made from wood that was transformed. And it typically represent
25% to 35% of the energy that is in the dry weight of the wood. <br>
<br>
You indicated that the area is reasonably wooded. So it is not a
case of scarcity of wood. <br>
<br>
If the created charcoal is put into the soil as biochar, then that
energy content is no longer available.<br>
<br>
You as the project leader and with your personnel can make the
decision about how to read the numbers in the reports on stove
efficiency (of fuel or of energy).<br>
<br>
Paul<br>
<br>
<pre class="ecxmoz-signature">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a class="ecxmoz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a class="ecxmoz-txt-link-abbreviated" href="http://www.drtlud.com" target="_blank">www.drtlud.com</a></pre>
On 9/15/2014 10:45 PM, Crispin Pemberton-Pigott wrote:<br>
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<blockquote cite="mid:COL401-EAS328B777B4F2F1E00568FD5DB1C90@phx.gbl">
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<p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Dear
Huck</span></p>
<p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></p>
<p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Just
one quick point:</span></p>
<p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></p>
<p class="ecxMsoNormal"><span style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>“</span><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>The gasifier, as I understand it, is more
efficient and has lower emissions.”</span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></p>
<div>
<div>
<div>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>It depends on the test method and the
metrics. It is fashionable to use the GACC-WBT and
that test does not report fuel consumption, it reports
the fuel mass equivalent of the energy consumption,
treating charcoal left over as unburned raw fuel
(meaning it says the wood was not consumed).</span><span lang="EN-US" style='font-family: "Helvetica","sans-serif"; font-size: 13.5pt;'></span></p>
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<p class="ecxMsoNormal"><span lang="EN-US" style="color: rgb(31, 73, 125);"> </span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Thus ‘gasifiers’ are getting rated as if they
do not consume fuel that is actually consumed. When you
assess the performance be sure you are clear on how the
method calculates performance and what the metrics are.
You may want to measure ( and weigh) fuel needed per
cooking cycle rather than use any calculated numbers from
a complex test protocol.</span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>For evaluation of performance I recommend the
CSI-WHT which is a water heating test (no boiling) and a
measure of the raw fuel needed per replication of the
cooing cycle. It is used by the WB in the Clean Stove
Initiative in Indonesia. Documentation (some anyway) is
available.</span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Regards</span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'>Crispin in Tamil Naidu</span></p>
<p class="ecxMsoNormal"><span lang="EN-US" style='color: rgb(31, 73, 125); font-family: "Calibri","sans-serif"; font-size: 11pt;'> </span></p>
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