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Hi again, Dean!<br>
<br>
Spent most of the afternoon chasing down infos on torrefaction
projects. So far I know of two running for sure, maybe a third, the
last in SC, the former two in PA and SD. The one in Rapid City SD is
a production plant (which is similar to one in the Netherlands.)
tsi-inc.net is their website, but the browser keeps timing out, so
don't know if they're down for Sunday, or what.<br>
<br>
<a class="moz-txt-link-freetext" href="https://www.youtube.com/watch?v=biWNh1iPnzQ">https://www.youtube.com/watch?v=biWNh1iPnzQ</a><br>
<br>
the one in PA runs about 1000# of biocoal / hour <br>
<a class="moz-txt-link-freetext" href="http://www.terragreenenergy.com/">http://www.terragreenenergy.com/</a><br>
<br>
The Greenville, SC plant should be in production at 11K t/annum <br>
<a class="moz-txt-link-freetext" href="http://www.integrofuels.com/">http://www.integrofuels.com/</a><br>
<br>
If I understand you, your goal in this is to try to get an
idiot-proof fuel?<br>
<br>
regards,<br>
Ronald von Bayernnässetrotzbayernchampions<br>
<br>
<br>
<br>
<br>
<div class="moz-cite-prefix">On 24.05.2015 19:52, Dean Still wrote:<br>
</div>
<blockquote
cite="mid:CA+tShZtM7pQROsPz9UMsNCOP-DFYqa_eysR6f7BW74Wsk6RnLQ@mail.gmail.com"
type="cite">
<div dir="ltr">Dear Ronald,
<div><br>
</div>
<div>Thanks for your helpful comments. Charcoal without
remaining wood in it doesn't make smoke but, of course, wood
really likes to smoke. With biomass the preparation including
recipe, drying, pellet size, etc. makes a big difference in
emissions when trying to get down to the very low levels
needed to protect health. I'm making some torrified pellets
and will report back after testing under the hood.</div>
<div><br>
</div>
<div>All Best,</div>
<div><br>
</div>
<div>Dean<br>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, May 23, 2015 at 3:52 PM,
Ronald Hongsermeier <span dir="ltr"><<a
moz-do-not-send="true" href="mailto:rwhongser@web.de"
target="_blank">rwhongser@web.de</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Dear Dean,<br>
I may seem like I'm harping here, but now that you've
said a bit more, you've mentioned a couple of factors
that I have noticed in my limited experience without a
hood and therefore without concrete parametric
analysis, but for which I can give some postulates.<br>
<br>
1. The wood-gas stove in design mode depends on a
uniform fuel "chunk-size" which promotes a level
"pyrolysis" front(planar) migrating towards the bottom
of the stove. If that plane is broken by
dis-uniformity in the fuel or overly large gaps
between the fuel pieces, you will get a spot drop in
temperature along with glowing fuel which will migrate
unevenly towards the bottom of the stove, breaking the
pyrolysis front and sometimes dropping the mean temp
inside the burning chamber such that the rising wood
gas will no longer be close enough to critical temp
that the onset of 2nd-ary air will ignite it.<br>
<br>
2. 1. would be consistent with the bark observation.
Bark generally has lots more minerals and less energy
per unit mass. Did you/they assure dryness level of
the bark? Were the pieces between
(cross-section/10-20) of the stoves throat? Do you
mean pellets from eucalyptus wood or when eucalyptus
oil is poured on the fuel? Off the shelf kerosin
burners here in germany are strictly regulated as to
what you may or may not burn in them. If it is smoking
it is either wrong fuel, design flaw or user error.<br>
<br>
3. Pellets pack closely, so if they are smoking,
usually the problem can be fixed by either turning up
the fan a bit or putting some chimney length between
the secondary air and the pan to increase the draw.
(i.e., the primary air is probably not of sufficient
pressure to deliver enough O2 to the pyrolysis front
to keep it hot enough such that it will ignite upon
contact with the secondary air.)<br>
<br>
4. Because torrefied pellets are partially reacted,
they may be somewhat less dense and especially because
the ends will be cleaner, they may not resist airflow
as much, which may help somewhat with 3. above. I
would expect them to act very similar to dry pellets,
except for the difference in density.<br>
<br>
regards,<br>
Ronald von Aftermidnighttimeforantibiotics (and bed)<br>
<br>
<br>
<br>
<br>
<div>On 23.05.2015 23:49, Dean Still wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Dear Ron,
<div><br>
</div>
<div>We had three women interns here at the
research center for a summer who found cleaner
burning recipes for the TLUDs gathered from the
surrounding forest. Some things like bark make
smoke, etc.</div>
<div><br>
</div>
<div>Many pellets smoke when using eucalyptus,
etc. Different mixtures of kerosene make more or
less smoke in off the shelf stoves.</div>
<div><br>
</div>
<div>I'm wondering if torrified pellets will burn
cleaner than normal pellets.</div>
<div><br>
</div>
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Dean</div>
</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, May 23, 2015 at
1:28 PM, Ronald Hongsermeier <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:rwhongser@web.de"
target="_blank">rwhongser@web.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0
0 0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div bgcolor="#FFFFFF" text="#000000"> Hi
Dean,<br>
I remember that there was a proposed
university program (W. Virginia or the
Carolinas??) In view of the deaths(not
_many_ but tragic) that have taken place due
to off-loading of pellets at some European
ports (CO in the hold) The torrefaction
could lead to a more inert fuel. That's
hopeful speculation on my part however. You
would be transporting some less bound water
and the energy density is better than
regular pellets in addition to the lack of
liquid or vapor H2O absorption issue
mentioned before-- these would lend
efficiencies in the logistics end of things
and an even more uniform fuel than regular
pellets, which tend to absorb quite a bit
of water here in the damp winter weather...<br>
I have to admit that I'm a bit puzzled as to
what you mean by cleaner fuel recipes. What
specific pollutant are you interested in or
are you talking about particulate?<br>
If you aren't choking the burn by putting
the pot too close, you should be getting a
very clean burn with a TLUD?!?<br>
<br>
regards,<br>
Ron<br>
<br>
<div>On 23.05.2015 22:01, Dean Still wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi Ronald,
<div><br>
</div>
<div>I'll keep looking. I think that we
shouldn't forget cleaner fuel recipes
as part of the solution.
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Dean</div>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Sat, May
23, 2015 at 12:33 PM, Ronald
Hongsermeier <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:rwhongser@web.de"
target="_blank">rwhongser@web.de</a>></span>
wrote:<br>
<blockquote class="gmail_quote"
style="margin:0 0 0
.8ex;border-left:1px #ccc
solid;padding-left:1ex">
<div bgcolor="#FFFFFF"
text="#000000"> Hi Dean,<br>
I did some searching around on
the internet several years ago
on this topic.<br>
I'd like to try torrefied
stuff as well, but I struck
out at that time.<br>
No idea where to find them.<br>
The main advantage that I
picked up on at that time was
that they should be relatively
inert as to picking up extra
water after they were
pelletized.<br>
Cleaner burning than what?<br>
clean burning is a control
issue, not a fuel issue as far
as I understand. If I
understand the concept
correctly, it's like using
part of the large molecules
initially broken out (cracked)
by the heat in the reaction
vessel to coat the surfaces of
the remaining unpyrolized
material. This should burn
quite okay in a TLUD.<br>
<br>
regards,<br>
Ronald von
Nasennebenhöhlenhölle (but I'm
coming back)<br>
<br>
<br>
<div>On 23.05.2015 20:56, Dean
Still wrote:<br>
</div>
<blockquote type="cite">
<div dir="ltr">Hi All,
<div><br>
</div>
<div>I'd like to try
torrified pellets in a
TLUD under the emissions
hood.</div>
<div><br>
</div>
<div>Any ideas on where to
find them?</div>
<div><br>
</div>
<div>Or if it should be
cleaner burning?</div>
<div><br>
</div>
<div>Best,</div>
<div><br>
</div>
<div>Dean</div>
</div>
<br>
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