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Rogerio,<br>
<br>
Please forgive me for changing the Subject line, but your topic is
so important that it merits discussion separate from the research
results.<br>
<br>
There are a few TLUD stoves that do have chimneys. But I have
never heard of users complaining of the need to clean chimneys on
TLUD stoves. Maybe someone can provide info for us. Todd Albi at
Silverfire has some and maybe could comment on user experiences.<br>
<br>
My own work has not included much use of chimneys, and not for
extended periods of time. But I have seldom seen much accumulation
of tarry "gunk" that would be able to build up enough to clog a
chimney. <br>
<br>
Perhaps the lack of TLUD stoves with chimneys reflects that they do
not need chimneys when the kitchens are very well ventilated (or
even without some of its four walls). <br>
<br>
Could you please provide us with your thoughts and experiences with
clogging of chimneys?<br>
<br>
Paul<br>
<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>
<div class="moz-cite-prefix">On 7/13/2016 10:37 AM, Rogerio carneiro
de miranda wrote:<br>
</div>
<blockquote
cite="mid:CADB_T=imFn8=Og3qW8TGNEVsAPDfSjMi9hLPachfKf4HZDe4pw@mail.gmail.com"
type="cite">
<div dir="ltr">
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large">Quite
interesting.</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large"><br>
</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large">I am
more interested on the aspect of reduce cleaning of chimneys.
For chimney stoves the impact of such technology might be
greater on reduced cleaning frequency of chimneys than on IAP
directly. This may benefit greater adoption of chimney stoves
(less cleaning), which also naturally minimize IAP.</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large"><br>
</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large">Rogério<br>
</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large"><br>
</div>
<div class="gmail_default"
style="font-family:tahoma,sans-serif;font-size:large"><br>
</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">2016-07-13 11:35 GMT-03:00 Tom Miles <span
dir="ltr"><<a moz-do-not-send="true"
href="mailto:tmiles@trmiles.com" target="_blank">tmiles@trmiles.com</a>></span>:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">From Ashok
Gadgil's group at Berkeley:<br>
The following content is published on the ACS Web Editions
Platform:<br>
<br>
Reducing Ultrafine Particle Emissions Using Air Injection in
Wood-Burning Cookstoves<br>
Vi H. Rapp, Julien J. Caubel, Daniel L. Wilson and Ashok J.
Gadgil<br>
Environ. Sci. Technol., Article ASAP<br>
DOI: 10.1021/acs.est.6b01333<br>
Publication Date (Web): July 13, 2016<br>
Copyright © 2016, American Chemical Society<br>
<a moz-do-not-send="true"
href="http://pubs.acs.org/doi/abs/10.1021/acs.est.6b01333"
rel="noreferrer" target="_blank">http://pubs.acs.org/doi/abs/10.1021/acs.est.6b01333</a><br>
<br>
Abstract<br>
In order to address the health risks and climate impacts
associated with pollution from cooking on biomass fires,
researchers have focused on designing new cookstoves that
improve cooking performance and reduce harmful emissions,
specifically particulate matter (PM). One method for
improving cooking performance and reducing emissions is
using air injection to increase turbulence of unburned gases
in the combustion zone. Although air injection reduces total
PM mass emissions, the effect on PM size distribution and
number concentration has not been thoroughly investigated.
Using two new wood-burning cookstove designs from Lawrence
Berkeley National Laboratory, this research explores the
effect of air injection on cooking performance, PM and
gaseous emissions, and PM size distribution and number
concentration. Both cookstoves were created using the
Berkeley–Darfur Stove as the base platform to isolate the
effects of air injection. The thermal performance, gaseous
emissions, PM mass emissions, and particle concentrations
(ranging from 5 nm to 10 μm in diameter) of the cookstoves
were measured during multiple high-power cooking tests. The
results indicate that air injection improves cookstove
performance and reduces total PM mass but increases total
ultrafine (less than 100 nm in diameter) PM concentration
over the course of high-power cooking.<br>
<br>
T R Miles Technical Consultants Inc.<br>
<a moz-do-not-send="true" href="mailto:tmiles@trmiles.com">tmiles@trmiles.com</a><br>
<br>
<br>
<br>
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