<html>
<head>
<meta content="text/html; charset=ISO-8859-1"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Ron,<br>
<br>
I am in Uganda now and have not had a chance to see the thesis.
Thank you for the comments.<br>
<br>
About #3, the Oorja stove is rather heavy for turning over, has a
smallish fuel chamber meaning not much char and only short TLUD
burns, and has a loose cast iron cup in the bottom that would fall
out if the unit is tipped over to remove the char. It is
designed to NOT be tipped over for saving char. <br>
<br>
It is intentionally designed to have continuous burning with the
fire in the bottom consuming char. And when doing that, the
Oorja is NOT operating in the TLUD mode which is specifically
characterized by the migratory pyrolytic front (MPF), but the
Oorja is not with MPF after the rather small initial load of fuel
has been pyrolyzed. <br>
<br>
Therefore, the Oorja (and most others with forced air FA)
essentially is NOT a TLUD because it is operated without the MPF
except for the initial batch of fuel.<br>
<br>
I will be addressing this topic more at the Stove Camp at
Aprovecho on 22 - 26 July.<br>
<br>
Paul<br>
<pre class="moz-signature" cols="72">Paul S. Anderson, PhD aka "Dr TLUD"
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>
On 6/27/2013 2:43 PM, <a class="moz-txt-link-abbreviated" href="mailto:rongretlarson@comcast.net">rongretlarson@comcast.net</a> wrote:<br>
</div>
<blockquote
cite="mid:381415093.665753.1372362222069.JavaMail.root@sz0133a.emeryville.ca.mail.comcast.net"
type="cite">
<style type="text/css">p { margin: 0; }</style>
<div style="font-family: Arial; font-size: 12pt; color: #000000">Julien
and list<br>
<br>
1. Thanks very much for providing this cite. I have read most
and find it to be a well done thesis. I wish we had more like
it.<br>
<br>
2. The concepts of char and TLUDs are in here thoroughly. But
nothing on the idea of a stove designed to make char. All char
is presumed and desired to be consumed. <br>
<br>
3. My conclusion (would like to hear more) is that a good case
is made (not intentionally) for NOT consuming the produced char
in a TLUD (this one fan-powered and widely sold in India as the
"Oorja" (started by BP)). Very little gain in overall
efficiency as the char is consumed.<br>
<br>
4. A major advance was his study of the importance of ash in
this "char" period as a poor radiator - thereby responsible for
(undesired) high char temperatures.<br>
<br>
5. Most everything shown as a function of superficial velocity
(Vs) - with 16-17 cm/sec shown as key dividing point in stove
behavior.. Above which velocity one swtches from char
production to char consumption. I have not seen this before.<br>
<br>
For his highly automated fan system, measuring Vs was
apparently not so difficult. Anyone able to give a way to get
an easy estimate of Vs, when there is only natural draft?<br>
<br>
6. Quite a bit on the importance of low emissions of CO.<br>
<br>
7. Good information on both the experimental and computational
side of top-lit (packed bed) stoves. Not much here for rocket
stoves.<br>
<br>
Have I got #3 right?<br>
<br>
Ron<br>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
<a class="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="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="moz-txt-link-freetext" href="http://stoves.bioenergylists.org/">http://stoves.bioenergylists.org/</a>
</pre>
</blockquote>
<br>
</body>
</html>