<div dir="ltr">Dear Ms Neeraja, Dr Paul and to the rest of the team and to the GACC<div><br></div><div>I could not express enough my gratitude after receiving this handbook It is exactly what i need to boost up my knowledge and skills in stove design. This gave me confidence to improve my existing models and immediately after hold training sessions to teach others. </div><div><br></div><div>God bless to you all. </div><div><br></div><div>Jed Guinto </div><div>Philippines</div></div><div class="gmail_extra"><br clear="all"><div><div class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div><b><span style="font-family:garamond,serif">Joshua B. Guinto<br></span></b><span style="font-family:garamond,serif">Specialist, Appropriate Technology<br></span></div><span style="font-family:garamond,serif">MSc Management of AgroEcological Knowledge and Social Change (MAKS)<br></span></div><span style="font-family:garamond,serif">Wageningen University, The Netherlands</span> <span style="font-family:garamond,serif">2006 to 2008</span><b><br></b></div><div><span style="font-family:garamond,serif">Recipient, International Fellowships Programme Award (IFP) 2005<br></span></div><div><span style="font-family:garamond,serif">Ford Foundation </span><b><br></b></div><div dir="ltr"><br></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">2017-08-01 7:19 GMT-07:00 Paul Anderson <span dir="ltr"><<a href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div text="#000000" bgcolor="#FFFFFF">
Stovers, (and placed on the ePosts at the <a class="m_-1048868621723327238moz-txt-link-abbreviated" href="http://www.drtlud.com" target="_blank">www.drtlud.com</a>
website for easy access and wider audiences)<br>
<br>
This new publication is definitely worth some of your time to
download (free), save, and look at (at least scroll through and
"read at your degree of interest"). Good diagrams, and very nice
summaries of the issues of stove R&D and design. <br><span class="">
<br>
Download the full handbook here:
<a class="m_-1048868621723327238moz-txt-link-freetext" href="http://cleancookstoves.org/resources/517.html" target="_blank">http://cleancookstoves.org/<wbr>resources/517.html</a>
<br>
<br></span>
Of course I focused on the TLUD issues. <br>
1. No glaring errors were noted. (Opps, one is noted when I wrote
the content below). <br>
<br>
2. There were some understatements that have background stories
that would be too detailed for this publication.<br>
Example is on Page# 22 (22 of 36 digital sheets).<br>
<blockquote type="cite">FUEL BATCH SIZE AND RELOADING IN GASIFIER
STOVES<br>
Users of batch-fueled cookstoves like TLUDs often wish to continue
cooking after the initial fuel <br>
batch has burned out. Adding new fuel to the stove causes it to
switch from operating in a TLUD <br>
mode to a conventional updraft gasifier mode (Figure 15).</blockquote>
That part is true. But then it goes on about Tryner's work at CSU
with observed difficulties (correct) but does not say that that
research put in a substantial amount of new fuel all at one time (a
major cause of the difficulties). <br>
<br>
The continuing paragraph refers to Aprovecho results with a TLUD-FA
stove (incorrectly reference to the Reed-Larson 1996 article about
TLUD-ND stoves) and states that performace is not compromised when:
<blockquote type="cite">
<p class="MsoNormal" style="margin-bottom:0in;margin-bottom:.0001pt;line-height:normal"><span>the user
can meter in additional
fuel through the door in a low-power operating mode. </span></p>
</blockquote>
Sorry, but in my opinion, there are serious compromises (some
increase in emissions including when each new amount of fuel hits
the top of the charcoal bed and shortening the stove life because of
high temperatures from air directly blowing on hot charcoal in the
bottom). Therefore, this refueling is NOT good advice. So, I
would say that this is a glaring error that unfortunately will be
repeated over and over, with citation to this publication. But
that is only my opinion.<br>
<br>
3. A few missed opportunities to make more complete statements:<br>
Example: Page # 32 (34 of 36 digital sheets):<br>
<blockquote type="cite">To achieve more turbulent flow without a
fan, natural-draft cookstove designers have added features <br>
to the interior geometry that suddenly change the flow path and
create turbulence in local <br>
mixing zones. </blockquote>
Very true. Then comes the example with a side-feed stick-burner
stove (rocket type, but not showing the rocket fuel shelf; in fact,
I do not recall seeing a full discussion of the true Rocket
innovation by Winearski to have the air entering under the burning
tips of the sticks).<br>
<br>
<blockquote type="cite">For example, the Envirofit G-3300 has a
choke ring, like a large metal washer, in the riser. The <br>
choke ring disturbs the flow of air and combustion gases and
generates a local mixing zone <br>
(Figure 20) (DeFoort et al., 2010.</blockquote>
Then there is reference to Natural Draft TLUDs, but only the
stationary vane that were pioneered by Kirk Harris (not mentioned)
and attributed to Aprovecho.<br>
<br>
What was not mentioned is the "concentrator" (disk or plate) that
does precisely the same thing as does a "choke ring"and it is the <br>
fundamental innovation of Wendelbo's Peko Pe TLUD (1990s) and
Anderson's Champion TLUD (2005). <br>
<br>
I hope that others will send comments about this publication that is
worthy of wide consideration by all "Stovers".<br>
<br>
Paul<br>
<br>
<pre class="m_-1048868621723327238moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a class="m_-1048868621723327238moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu" target="_blank">psanders@ilstu.edu</a>
Skype: paultlud Phone: <a href="tel:(309)%20452-7072" value="+13094527072" target="_blank">+1-309-452-7072</a>
Website: <a class="m_-1048868621723327238moz-txt-link-abbreviated" href="http://www.drtlud.com" target="_blank">www.drtlud.com</a></pre><div><div class="h5">
<div class="m_-1048868621723327238moz-cite-prefix">On 8/1/2017 6:36 AM, Neeraja Penumetcha
wrote:<br>
</div>
<blockquote type="cite">
<pre>Biomass cookstove technology and performance have significantly improved over the last decade. Yet entrepreneurs and designers trying to build a better stove can still face a wide range of challenges. Design features that improve performance can come with higher production costs or usability challenges, for example. Enterprises often have limited resources for research and development, but must produce higher performing, usable, affordable technologies to stay competitive. R&D advancements that help balance these requirements are often not translated into practical guidance that is accessible to stove designers.
A new handbook aims to help designers and entrepreneurs by translating recent R&D advances into practical approaches for improving biomass cookstove performance, usability, and affordability. The Handbook for Biomass Cookstove Research, Design, and Development, was developed in partnership with MIT's D-Lab and the Global Alliance for Clean Cookstoves, with funding by UK aid from the UK government. Topics including ignition, air, fuel, mixing, and materials are covered through a synthesis of research findings and innovations from several different organizations. These components of the cooking process are all highly interrelated, so the handbook encourages consideration of these components together.
Download the full handbook here: <a class="m_-1048868621723327238moz-txt-link-freetext" href="http://cleancookstoves.org/resources/517.html" target="_blank">http://cleancookstoves.org/<wbr>resources/517.html</a>
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