<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body bgcolor="#FFFFFF" text="#000000" lang="en-US" style="background-color: rgb(255, 255, 255); line-height: initial;">
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
Dear Paul'n'All</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
Nearly all the stoves approved for the Ulaanbaatar Clean Air Program (UC-CAP) are TLUD's with chimneys. They all save maybe one can heat and cook. </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
I can say with some confidence that the chimney cleaning requirement is drastically reduced. The reason is obvious: they produce 93-99% less PM2.5. </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
The increase in PM nanoparticles is a well known consequence of 'cleaning up' the emissions. When the particle formation process is interrupted it results in smaller particles. </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
A caution here is that PM mass for small sizes is not relevant, they are counted instead. This means that as this topic proceeds new concepts and terminology are going to be used. </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
Mass concentration of particles might be reported for both so there is some overlap that serves to get a grip on the difference. </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
Regards </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
Crispin </div>
<div style="width: 100%; font-size: initial; font-family: Calibri, 'Slate Pro', sans-serif, sans-serif; color: rgb(31, 73, 125); text-align: initial; background-color: rgb(255, 255, 255);">
<br>
</div>
<br>
<div style="background-color:#FFFFFF">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="x_moz-signature" cols="72">Doc / Dr TLUD / Prof. Paul S. Anderson, PhD
Email: <a class="x_moz-txt-link-abbreviated" href="mailto:psanders@ilstu.edu">psanders@ilstu.edu</a>
Skype: paultlud Phone: +1-309-452-7072
Website: <a class="x_moz-txt-link-abbreviated" href="http://www.drtlud.com">www.drtlud.com</a></pre>
<div class="x_moz-cite-prefix">On 7/13/2016 10:37 AM, Rogerio carneiro de miranda wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">
<div class="x_gmail_default" style="font-family:tahoma,sans-serif; font-size:large">
Quite interesting.</div>
<div class="x_gmail_default" style="font-family:tahoma,sans-serif; font-size:large">
<br>
</div>
<div class="x_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="x_gmail_default" style="font-family:tahoma,sans-serif; font-size:large">
<br>
</div>
<div class="x_gmail_default" style="font-family:tahoma,sans-serif; font-size:large">
Rogério<br>
</div>
<div class="x_gmail_default" style="font-family:tahoma,sans-serif; font-size:large">
<br>
</div>
<div class="x_gmail_default" style="font-family:tahoma,sans-serif; font-size:large">
<br>
</div>
</div>
<div class="x_gmail_extra"><br>
<div class="x_gmail_quote">2016-07-13 11:35 GMT-03:00 Tom Miles <span dir="ltr"><<a href="mailto:tmiles@trmiles.com" target="_blank">tmiles@trmiles.com</a>></span>:<br>
<blockquote class="x_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 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 href="mailto:tmiles@trmiles.com">tmiles@trmiles.com</a><br>
<br>
<br>
<br>
_______________________________________________<br>
Stoves mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org" rel="noreferrer" target="_blank">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a><br>
<br>
for more Biomass Cooking Stoves, News and Information see our web site:<br>
<a href="http://stoves.bioenergylists.org/" rel="noreferrer" target="_blank">http://stoves.bioenergylists.org/</a><br>
<br>
</blockquote>
</div>
<br>
</div>
<br>
<fieldset class="x_mimeAttachmentHeader"></fieldset> <br>
<pre>_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
<a class="x_moz-txt-link-abbreviated" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>
to UNSUBSCRIBE or Change your List Settings use the web page
<a class="x_moz-txt-link-freetext" href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a>
for more Biomass Cooking Stoves, News and Information see our web site:
<a class="x_moz-txt-link-freetext" href="http://stoves.bioenergylists.org/">http://stoves.bioenergylists.org/</a>
</pre>
</blockquote>
<br>
</div>
</body>
</html>