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Frank and all,<br>
<br>
Separate from the coal topic of Dushambe, so I changed the Subject
line. <br>
<br>
About a Baffle stove: On 12/4/2015 12:42 PM, Frank Shields wrote:
[with my additions in [... ] brackets]<br>
<blockquote
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type="cite">
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<div class="">One idea [to attain a longer burn time] might be to
add a night time insert. That would [from the side] look like a
<u class="">IIIIIIII</u></div>
<div class="">with baffles that go almost to the base. The base
has fuel [coal is being discussed, but could be other fuel
types] spread across the bottom. You lite [at the bottom] the
one close to the door and that burns up quickly but it takes
longer to ignite the second baffle and even longer for the
third and so on……</div>
</blockquote>
Frank, I like the idea of baffles of some type. Probably done in
some ways somewhere maybe long ago, but baffles are certainly not
evident in currently discussed stoves and therefore your idea is a
new innovation for us 21st Century stovers.<br>
<br>
I want to add a further variation for consideration. It is based
on TLUD principles.<br>
<br>
Consider a rectangular fuel chamber with several vertical baffles
running across between the long side walls (3 or 4 are sufficient
for the concept, but could be more.) First thought was to have
square vertical boxes that are in a row, basically with one side
shared by two squares. (cylinders with obvious spaces is a
variation to discuss later). Call them B1, B2, etc for Box 1, Box
2......<br>
<br>
Ignite B1 at the top and let the MPF (Migratory Pyrolytic Front) do
its job downward through that fuel, with burning of the created
gases at the combustor level. When the MPF reaches near the
bottom, it encounters a hole on one side. That hole is attached to
a vertical pipe that is able to receive some (maybe 20%??) of the
pyrolytic gases. (the percentage could increase if the side hole is
actually a vertical slit / hole that receives more gases as more of
the slit is in the zone of the MPF.)<br>
<br>
The gases in the vertical pipe (call it an "ignition pipe") reach
the top and are ignited by the existing flame in the combustor.
But those combusting gases are able to move upward into the
combustor area of the adjoining box B2. In that way flame is into
the area of B2, and within a few minutes of time B2 has become Top
Lit and begins to operate as a TLUD. The process continues with B1
essentially shutting down (very little draft) and several ways of
extinguishing the created charcoal by an operator or even
"automatically". <br>
<br>
B2 ends and transitions to B3 in the same way. If the burn-time of
each Box is approximately one hour (easy to accomplish with height
and with reasonable fuel like pellets), 8 boxes would operate the
heater through the night.<br>
<br>
Quite literally, the boxes could be in a snake form or in a "6-pack"
or 12 pack or spiral arrangement and continue for 12 hours or even
longer. If the boxes were of different cross-sectional areas
(different diameters), there could be different intensities of heat
at different times. That is, the five boxes B4 through B8 could
have smaller X-section areas and give less heat in the hours from
midnight to 5 AM, when B9 could have a larger fire. <br>
<br>
BTW, that B9 fire could be under a pot with bath water to be heated
and ready at 6 AM when needed.<br>
<br>
What is described above is a system for CONTINUAL TLUD operation, as
in a serial continual sequence. <br>
<br>
This system should work also for larger (such as barrel-size) TLUDs
for making biochar AND with heat generation through a long cold
night inside a greenhouse. <br>
<br>
Of course it can be improved. And it can have electronic
monitoring and the use of fans and blowers that can make the TLUDs
respond in many ways. Such a system can have bells and whistles
(figuratively and literally) such as alarms if temperatures go
beyond user-specified highs and lows, or digital CO sensors with
alarms about the ambient air inside a greenhouse.<br>
<br>
Should it be cylinders instead of square boxes? One advantage of
the cylinders is that the vertical ignition pipe can be placed in
the natural area where the edges of cylinders are not touching
00000. But shared walls cost less in materials, and the heat
through the walls help pre-warm (and pre-dry) the fuel in the next
box to be ignited. But too much heat could cause premature
ignition. These are considerations for experimentation. <br>
<br>
So, as of 9:30 AM CST on Saturday 5 December 2015, with the
presentation of this message to the publicly accessed Stoves and
Biochar listservs, the above ideas are made public. I believe that
I and Frank have some intellectual property (IP) rights for one year
after public disclosure. So if you want to try for patents, etc,
you should include Frank and me. But instead, if your work is in
the public domain, please feel free to get started. We want you to
be successful. But we do want to be kept informed of activities
and to encourage collaborative efforts. <br>
<br>
To move this concept / idea forward, we need some time and
funding. We hope that it is YOUR time and YOUR funds, or that you
help us find outside funds that can pay for the time and
materials. Frank and I are both retired. And we do not have the
metalwork shops that should be involved with this work. So we
encourage your participation, and please keep us informed of your
initial interest (which means tell us SOON), your initial
activities, progress, results, and plans for taking it further.
Our email addresses are: Paul Anderson
<a class="moz-txt-link-rfc2396E" href="mailto:psanders@ilstu.edu"><psanders@ilstu.edu></a> and Frank Shields
<a class="moz-txt-link-rfc2396E" href="mailto:franke@cruzio.com"><franke@cruzio.com></a><br>
<br>
We look forward to the discussion and to any activities. This
might all blow over and become nothing. Or it might be a major
step forward. <br>
<br>
Paul<br>
<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>
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