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<div class="moz-cite-prefix">Stovers,<br>
<br>
I am forwarding a message from Paal Wendelbo this is quite
informative about pyrolysis of grass fuel in his Peko Pe. It
should apply to all true TLUD stoves with full diameter access to
the fuel chamber.<br>
<br>
I now ask Paal: Please discuss the "grasses". There are so
many types. Do your comments / experiences relate to certain
types (such as those with nice stiff stems, which species??) more
than to other types of wavy / leafy grasses?<br>
<br>
Also, the diameter of you stove is important to get 1/2 kg in a
bundle that is 20 cm tall. Did you have stoves with different
diameters?<br>
<br>
Very important info you gave about difficulties when the grasses
are simply packed in (not in bundles of vertical stems).<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 8/23/2013 3:09 AM, Paal Wendelbo wrote:<br>
</div>
<blockquote cite="mid:5A6A203598D24A9AA7B4DE149ED82124@PaalPC"
type="cite">
<div dir="ltr">
<div style="FONT-SIZE: 12pt; FONT-FAMILY: 'Calibri'; COLOR:
#000000">
<p class="MsoNormal" style="MARGIN: 0cm 0cm 10pt; LINE-HEIGHT:
13pt"><span lang="EN-US"><font style="FONT-SIZE: 11pt">Dear
</font><em><span style="FONT-FAMILY: ;
mso-ascii-theme-font: minor-latin;
mso-hansi-theme-font: minor-latin;
mso-bidi-font-family: 'Times New Roman';
mso-bidi-theme-font: minor-bidi; mso-bidi-font-weight:
bold"><font style="FONT-SIZE: 11pt">Janitha Bandara</font></span></em><em><span
style="FONT-FAMILY: ; mso-ascii-theme-font:
minor-latin; mso-hansi-theme-font: minor-latin;
mso-bidi-font-family: 'Times New Roman';
mso-bidi-theme-font: minor-bidi; mso-bidi-font-weight:
bold; mso-bidi-font-style: italic"></span></em></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 10pt; LINE-HEIGHT:
13pt"><span><font style="FONT-SIZE: 11pt">Thanks for mail. I
can’t say I have done any </font><font
style="FONT-SIZE: 11pt">gasification researches for
grasses<span style="FONT-FAMILY: ; mso-ascii-theme-font:
minor-latin; mso-hansi-theme-font: minor-latin;
mso-bidi-font-family: 'Times New Roman';
mso-bidi-theme-font: minor-bidi; mso-bidi-font-weight:
bold">, but In have done a lot of practical use of
straw ( hyperrenia rufa) as fuel for household cooking
in Uganda in 1995, with the Peko Pe TLUIFD-ND stove.
We found the best way to utilize the straw was to cut
it to the height of the stove, 200 mm, made it into
bundles of ½ a kg and put it into the stove. The
bundles was burning nicely without smoke for about 20
minutes on the flame and another 20 minutes on the
glowing since the glowing straw did not collapse like
other types of fuel</span></font><span
style="FONT-FAMILY: ; mso-ascii-theme-font: minor-latin;
mso-hansi-theme-font: minor-latin; mso-bidi-font-family:
'Times New Roman'; mso-bidi-theme-font: minor-bidi;
mso-bidi-font-weight: bold; mso-bidi-font-style: italic"><font
style="FONT-SIZE: 11pt">. </font></span></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 10pt; LINE-HEIGHT:
13pt"><span><font style="FONT-SIZE: 11pt">You have a nice
clean flame on the generator, probably a bit too high,
depend what kind of use</font><font style="FONT-SIZE:
11pt"><em> </em>it is designed for. I should like to
know more about the aim of the construction. Is it to
produce gas or to produce energy for something else?</font></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 10pt; LINE-HEIGHT:
13pt"><span style="FONT-FAMILY: ; mso-ascii-theme-font:
minor-latin; mso-hansi-theme-font: minor-latin;
mso-bidi-font-family: 'Times New Roman';
mso-bidi-theme-font: minor-bidi; mso-bidi-font-weight:
bold; mso-bidi-font-style: italic" lang="EN-US"><font
style="FONT-SIZE: 11pt">Regarding I insulation, be aware
of higher temperature will strain the metal in the
combustion chamber, air could be better with double
function, cool down the temperature <span
style="mso-spacerun: yes"> </span>on the metal and the
same time preheat secondary air.</font></span></p>
<p class="MsoNormal" style="MARGIN: 0cm 0cm 10pt; LINE-HEIGHT:
13pt"><span style="FONT-FAMILY: ; mso-ascii-theme-font:
minor-latin; mso-hansi-theme-font: minor-latin;
mso-bidi-font-family: 'Times New Roman';
mso-bidi-theme-font: minor-bidi; mso-bidi-font-weight:
bold; mso-bidi-font-style: italic" lang="EN-US"><font
style="FONT-SIZE: 11pt">If you stamp grass into the
generatorto prolong the process, there will be a problem
of air going through, a 50 mm vertical channel in the
middle will solve the problem.</font></span></p>
<div style="FONT-SIZE: small; FONT-FAMILY: 'Calibri';
FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal;
TEXT-DECORATION: none; DISPLAY: inline">
<div style="FONT: 10pt tahoma">
<div><font size="3" face="Calibri">With regards Paal W. <a
moz-do-not-send="true" href="mailto:paaw@online.no">paaw@online.no</a></font></div>
<div style="BACKGROUND: #f5f5f5">
<div style="font-color: black"><b>From:</b> <a
moz-do-not-send="true" title="janithjc@gmail.com"
href="mailto:janithjc@gmail.com">janitha chandimal</a>
</div>
<div><b>Sent:</b> Wednesday, August 21, 2013 11:32 AM</div>
<div><b>To:</b> <a moz-do-not-send="true"
title="paaw@online.no" href="mailto:paaw@online.no">paaw@online.no</a>
</div>
<div><b>Subject:</b> Grass Gasification</div>
</div>
</div>
<div> </div>
</div>
<div style="FONT-SIZE: small; FONT-FAMILY: 'Calibri';
FONT-WEIGHT: normal; COLOR: #000000; FONT-STYLE: normal;
TEXT-DECORATION: none; DISPLAY: inline">
<div dir="ltr">Dear sir, Pall Wendelbo,
<div> </div>
<div>I m writing this according to the information got
from Paul Anderson, Golden, Colorado and He said that
you had done gasification researches for grasses. Me too
is doing my masters research on gasification of guinea
grass (Panicum maximum) and I have got some fine
results. It is a small scale system having 700 mm height
and 200 mm in diameter. But the main problem involved is
the quick exhaustion of feed stock and the compaction of
grass. I have here by attached my drawing and few pics
of the flame. looking forward to hear from you soon.
Thank you. </div>
<div> </div>
<div>Best regards <br clear="all">
<div> </div>
-- <br>
<div><strong><font color="#009900"><em>Janitha Bandara</em></font></strong></div>
<div><em><font color="#009900">PG Student, Dept. of
Chemical & Process Engineering, University of
Moratuwa, Sri Lanka</font></em></div>
<div><em><font color="#009900">0094713058696</font></em></div>
<div><em></em> </div>
<div><em><strong><font color="#cc0000">Take Hands in
Reducing Consumption, Saving Resources &
Protecting Environment</font></strong></em></div>
</div>
</div>
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