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Dear Paul</div>
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I generally concur with your comments about the selection. Jim, I have a suggestion: how about asking the stovers for recommendations for models and then do another set of tests?</div>
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I am particularly pleased to see some parallel tests using far more realistic fuel moisture choices. I don't believe anything about emissions from a stove using fuel with 5% a moisture content. Fuel moisture has a powerful influence on emissions of PM and
VOC's. </div>
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I would recommend stoves that have had at least 1000 sales on a commercial basis (excludes stoves bought by an org and given away) and those which are seen by 'us' to be representative of the state of the art. </div>
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Included in that category are the TLUD made by Sujatha and one or more models from Prime and Dr Nurhuda. </div>
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Regards </div>
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Crispin </div>
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<div>Stovers,<br>
<br>
I previously asked:<br>
On 5/31/2017 11:22 AM, Paul Anderson wrote:<br>
<blockquote type="cite"><br>
<blockquote type="cite">11 fuel-stove combinations covering a variety of fuels and different stoves are investigated for UFP emissions and PNSD.
</blockquote>
I am interested in knowing if those 11 included what I consider to be the better versions of TLUD stoves, both natural draft and forced air.
<br>
</blockquote>
<br>
I have now seen the article, and provide comments ABOUT THE STOVES SELECTED. This is NOT about the quality of measurements, etc.<br>
<br>
1. For purposes of review comments, I am allowed to provide some selected information from the publication:<br>
<br>
<img src="cid:part1.C65C41C9.C10D9825@ilstu.edu" alt=""><br>
**********************************<br>
Of interest (to me) are numbers 4, 6, 10, and 11. <br>
#4. Stove Tec Prototype. Lousy choice to be representing TLUD-FA stoves. This is old by TLUD standards.<br>
It was tested years ago with great results. Only one unit ever made, as far as I know..
<br>
<br>
#6. Belonio TLUD-FA (or FD) with rice husk fuel. Poor choice. Again, an older stove that did not go into
<br>
[much] production, and using a non-woody fuel when all other comparisons of solid fuels are wood.<br>
<br>
#10. Although Philips, it is a rocket stove, and not of main interest.<br>
#12. The Philips high-turbulance fan-jet stove. This is NOT designed for nor used in TLUD fashion.
<br>
<br>
Net result: This research tells us information that is of very little use and is not representative of the state of
<br>
the art of TLUD stoves, whether FA or ND.<br>
<br>
***************************************<br>
Crispin also guided me to another study by essentially the same group:<br>
"Polycyclic Aromatic Hydrocarbons in Fine Particulate Matter Emitted<br>
from Burning Kerosene, Liquid Petroleum Gas, and Wood Fuels in<br>
Household Cookstoves"<br>
Guofeng Shen,† William Preston,‡ Seth M. Ebersviller,§ Craig Williams,‡ Jerroll W. Faircloth,∥<br>
James J. Jetter,*,⊥ and Michael D. Hays⊥<br>
<br>
The solid-fuel (wood) stoves in this study were<br>
"(iii) wood (10 and 30% moisture content on a wet basis) in a forced-draft fan stove, and (iv) wood<br>
in a natural-draft rocket cookstove."<br>
<br>
Rockets did not do well (and not an issue with me). But the "forced-draft fan stove" that also was not optimal is
<br>
of interest to me. What TLUD-FA stove did they choose? An "Eco-chula XXL" which is seen at:<br>
<a class="moz-txt-link-freetext" href="http://www.ecochula.co.in/xxl.html">http://www.ecochula.co.in/xxl.html</a><br>
<br>
I my opinion, that was a terrible choice, (large diameter gives worse emissions, and is not representative of household cooking) and therefore the TLUD-FA results of this study are not representative. From the TLUD perspective, this study only contributed
to the PERCEPTION (erroneous in my opinion) that TLUD-FA stoves are not very good.
<br>
<br>
The Mimi Moto TLUD-FA has been available since 2015. That would have been a much better choice.
<br>
And certainly the Champion TLUD-ND (available since about 2008) is the best choice for that category stove, but is never included.
<br>
<br>
FYI, Except for the BEIA project in Uganda with the Mwoto TLUD-ND, I have never been asked about what TLUD stoves might best be include in testing or in research projects. Never. Not by EPA or CSU or Aprovecho or Berkeley or D-Lab or anyone else.
<br>
<br>
Paul<br>
<blockquote type="cite">
<pre class="moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
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>
</blockquote>
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