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<DIV><FONT face=Arial>Dear Teddy</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=cookswelljikos@gmail.com
href="mailto:cookswelljikos@gmail.com">Cookswell Jikos</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org">Discussion of biomass cooking
stoves</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Wednesday, November 13, 2013 5:14
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] Making smoke in
2013?</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>Hi All,
<DIV><BR></DIV>
<DIV>Would anybody be able to clarify from an emissions standpoint, (and
honestly I am not sure I understand it completely) is wood smoke is 'food' for
tree's?</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial># The first thing to do is define "smoke". :-) While
"pyrolysis products" may be beneficial for seed treatment or insect control, I
am guessing that the quantity, distribution and lack of permanence of
"pyrolysis products distributed as a result of poor combustion" would likely
have a minimil beneficial or detrimental effect on plant growth.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial># The "products of complete combustion" of biomass are
basically CO2 and water vapour. Additional CO2 in the atmosphere will be
beneficial to plant growth only if existing CO2 levels were the constraint to
plant growth. I am guessing that this is seldom the case... the limiting
factors are probably more likely to be Sunlight, Moisture, and
Nutrients.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV> If so, take my small stove business - if I sell 100 stoves in a
month that in total will use say - 1 ton of biomass (charcoal so perhaps 7
tons of wood). How many tree's would myself and my customers need to plant
every month to not only achieve a positive feedback loop of increased biomass
but be able to 100% reduce the emissions produced? </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial># The number of trees you need to support a stove
depends on the "Mean Annual Increment of Growth" for the trees being used for
fuel. For example, if heating my home requires 5 cords of wood per year, and
the "Mean annual increment" for spruce trees is 1 cord per acre per year, then
I would need an area of 5 acres to grow the trees required to heat my home
with no net increase or decrease of the wood on my woodlot. If the woodlot is
managed in a sustainable manner, then it is unlikely that "re-planting" will
be required, in that the trees will naturally "re-seed" the harvested areas,
or, depending on the species, the trees will send up clones from their roots.
Note that if one is not using "Sustainable Management Practises, there will
never be a gain in wood availability, no matter how many trees are
planted.</FONT></DIV>
<DIV><BR></DIV>
<DIV>Is this even possible? I feel very strongly that woodfuel stove
manufacturers and users should be responsible for replanting, growing and
advocating tree planting as a future source of renewable energy, if only for
our own job security. I am also very interested in finding out how one can
actually measure the number of tree's needed to be grown compared to the
number of stoves in use? (especially if the woodlot is managed under a
pruning/coppicing regime).</DIV>
<DIV> </DIV>
<DIV><FONT face=Arial># It is not that difficult. You need to know the amount
of wood consumed per year per stove, and the "Mean Annual Increment" of growth
for the tree species being grown in the particular area, and the percentage of
the "Mean Annual Increment" (MAI) that actually gets used as fuel. For
example, if the MAI is 1 cord per acre per year, and if half the wood is sold
off as logs, then 2 acres would be required to yield 1 cord of fuel
wood.</FONT></DIV>
<DIV><BR></DIV>
<DIV>many thanks for any thoughts, </DIV>
<DIV> </DIV>
<DIV><FONT face=Arial># I hope this is helpful.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Best wishes,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Kevin</FONT></DIV>
<DIV><BR></DIV>
<DIV>Teddy </DIV></DIV>
<DIV class=gmail_extra><BR clear=all>
<DIV>
<DIV dir=ltr>
<DIV><B>Cookswell Jikos</B><BR><A href="http://www.cookswell.co.ke"
target=_blank>www.cookswell.co.ke</A></DIV>
<DIV><A href="http://www.facebook.com/CookswellJikos"
target=_blank>www.facebook.com/CookswellJikos</A></DIV>
<DIV><A href="http://www.kenyacharcoal.blogspot.com"
target=_blank>www.kenyacharcoal.blogspot.com</A></DIV>
<DIV>Mobile: +254 700 380 009 <BR></DIV>
<DIV>Mobile: +254 700 905 913</DIV>
<DIV>P.O. Box 1433, Nairobi 00606, Kenya</DIV>
<DIV><IMG
src="https://lh5.googleusercontent.com/-mFnK50B4oS8/UUrgJle8z9I/AAAAAAAAB_o/OUjLd7wrKPg/s133/Cookswell+Logo.PNG"
width=71 height=96><BR></DIV>
<DIV><BR></DIV>
<DIV><BR></DIV>
<DIV><BR><BR><BR></DIV></DIV></DIV><BR><BR>
<DIV class=gmail_quote>On Mon, Nov 11, 2013 at 7:17 PM, Crispin
Pemberton-Pigott <SPAN dir=ltr><<A href="mailto:crispinpigott@gmail.com"
target=_blank>crispinpigott@gmail.com</A>></SPAN> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote>Dear Paul<BR><BR>I find this sentence odd so perhaps you
can explain it a little further:<BR>
<DIV class=im><BR>>And TLUDs are not intended to be charcoal
burners.<BR><BR></DIV>I am not sure this is true. The TLUD's used in the
Ulaanbaatar clean air<BR>programme are definitely intended to burn char and
they do it very well.<BR>More than 100,000 of them have been sold just in
that city.<BR><BR>I am drawing a distinction between the devices that burn
high and low carbon<BR>fuels, basically. I hear you saying that biomass
burning TLUD's aren't<BR>designed to burn char but that is the choice of the
designer, not a<BR>'feature' of TLUD's. If you change the superficial
velocity of the air<BR>supply it changes from one to the other.<BR><BR>Is it
possible that here are more TLUD's burning char (high carbon) than<BR>there
are TLUD's making it? It would be interesting if that was the
case,<BR>right?<BR><BR>I know there are reasons provided for making and
saving the char and a whole<BR>enthusiast sector devoted to the matter,
however it would be unfortunate if<BR>the acronym TLUD was tied to only one
form of combustion, while the world<BR>merrily went ahead with
two.<BR><BR>What are your thoughts on this?<BR><BR>Thanks<BR><SPAN
class=HOEnZb><FONT color=#888888>Crispin<BR></FONT></SPAN>
<DIV class=HOEnZb>
<DIV
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