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<DIV><FONT size=4>Dean,</FONT></DIV>
<DIV><FONT size=4>Thanks for the report which mentioned the importance of heat
transfer but mentioned no specifics.</FONT></DIV>
<DIV><FONT size=4>Could you or Dr. Winiarski or Dr. Baldwin expand on
this?</FONT></DIV>
<DIV><FONT size=4>How are you improving heat transfer?</FONT></DIV>
<DIV><FONT size=4>Lanny</FONT></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><SPAN style="FONT-SIZE: 12pt" id=yui_3_7_2_1_1375409476853_7981>>Both
Rockets and TLUDs were improved by paying greater attention to heat transfer.
Even though getting excellent heat transfer is well described and doesn’t have
to cost more it is amazing that getting more heat into the pot is so frequently
ignored. As Dr. Winiarski and Dr. Baldwin point out, optimized heat transfer is
a vitally import element in a good stove.</SPAN></DIV>
<DIV><FONT size=4> </FONT></DIV>
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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=deankstill@gmail.com href="mailto:deankstill@gmail.com">Dean
Still</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> Friday, August 02, 2013 12:07
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Stoves] Stove Camp Newsletter
2013</DIV>
<DIV><BR></DIV><BR>
<DIV class=gmail_quote><BR><BR>
<DIV><A name=1403b5902cdabc8f_top></A>
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<TD style="TEXT-ALIGN: center" height=77><IMG alt=ARC_Logo
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<P><SPAN
style="FONT-FAMILY: Georgia,'Times New Roman',Times,serif; FONT-SIZE: small"><SPAN
style="LINE-HEIGHT: 23px"><STRONG><SPAN
style="FONT-SIZE: 14pt">Aprovecho Summer
Newsletter</SPAN></STRONG></SPAN></SPAN></P>
<P style="TEXT-ALIGN: right"><SPAN style="FONT-SIZE: 12pt">August
1, 2013</SPAN></P>
<P><STRONG><SPAN style="FONT-SIZE: 12pt"><SPAN
style="TEXT-DECORATION: underline">Summer Stove Camp comes to a
close</SPAN></SPAN></STRONG></P>
<P style="TEXT-ALIGN: left"><IMG
style="FLOAT: right; MARGIN-LEFT: 2px" hspace=5
alt=Sidwell_StoveCamp align=right
src="http://aprovecho.org/lab/images/stories/Newsletters/Sidwell_StoveCamp.JPG"
width=350 height=0><SPAN style="FONT-SIZE: 12pt"><IMG
style="FLOAT: right; MARGIN-LEFT: 2px" hspace=5
alt=Sidwell_StoveCamp align=right
src="http://aprovecho.org/lab/images/stories/Newsletters/Sidwell_StoveCamp.JPG"
width=350 height=263>Sometimes Stove Camp goes so well and summer
2013 was one of those occasions. Many folks camped out and cooked
delicious meals for everyone. Large projects, like a couple of
bread ovens, were made and used. Manufacturers spent long, long
hours testing and improving their products. Everyone worked hard
and made huge progress throughout the week, especially the two
prize winners. </SPAN></P>
<P style="TEXT-ALIGN: left"><SPAN style="FONT-SIZE: 12pt">There
were two challenges for the week. One was sent to us by Jordan
Kowalke who is working for Total Land Care in Malawi. He is
designing a TLUD that will be used to burn wood chips for which he
requested the assistance of Stove Camp participants. Jordan sent a
list of specifications that the winning TLUD design must reach.
This prize was awarded to Mick Black and Jeffrey Santiago who
tweaked Paul Anderson's Quad 3 stove until it cleanly burned the
wood chips and lasted long enough to make <EM>posho</EM>, a
typical meal in Malawi.</SPAN></P>
<P style="TEXT-ALIGN: left"><IMG
style="FLOAT: left; MARGIN-RIGHT: 2px" hspace=5 alt=Dona_Dora
align=left
src="http://aprovecho.org/lab/images/stories/Newsletters/Dona_Dora.jpg"
width=NaN height=350><SPAN style="FONT-SIZE: 12pt">The other prize
was for any stove that met the Tier rating of 2-3-3-3-3 (Thermal
Efficiency, High & Low power PM, and High and Low power CO).
Many stoves met this criteria so participants were allowed to vote
for their favorite. The prize was awarded to David Evitt with his
Guatemalan Doña Dora stove which he toiled to improve all
week.</SPAN></P>
<P style="TEXT-ALIGN: left"><SPAN style="FONT-SIZE: 12pt">During
camp there was a ‘shotgun’ approach of many individual tests done
by many operators. For this we had three testing locations set-up.
The two Laboratory Emissions Monitoring Systems (LEMS) in the lab
and a new configuration we are calling “IAP-in-a-Box”, which is a
test kitchen with a basic hood and collection chamber that holds
the Indoor Air Pollution Meter (IAPM). This system was set up with
the idea that testers can watch the live output from the meter and
gauge their design’s progress without having to do a full test
with the more complicated LEMS equipment. The “IAP-in-a-Box” is
being documented for those who wish to test total stove emissions
using the small, portable, IAP Meter. Please contact us if you are
interested in getting a system.</SPAN></P>
<P style="TEXT-ALIGN: left"><IMG
style="FLOAT: right; MARGIN-LEFT: 2px" hspace=5 alt=Dr_TLUD_Graph
align=right
src="http://aprovecho.org/lab/images/stories/Newsletters/Dr_TLUD_Graph.jpg"
width=350 height=421><SPAN style="FONT-SIZE: 12pt">Last summer
people did many tests on charcoal stoves and it was obvious
looking at the results that although charcoal stoves emitted a lot
of CO they were almost all very low for PM. This year we created a
large graphic representation of all the tests on the wall and
added to it everyday. The conclusion was that TLUDs generally
produce lower amounts of PM than Rocket stoves but there
seemed to be two classes of TLUDS: really clean ones and only
moderately clean ones. Both Rockets and TLUDs were improved by
paying greater attention to heat transfer. Even though getting
excellent heat transfer is well described and doesn’t have to cost
more it is amazing that getting more heat into the pot is so
frequently ignored. As Dr. Winiarski and Dr. Baldwin point out,
optimized heat transfer is a vitally import element in a good
stove.</SPAN></P>
<P style="TEXT-ALIGN: left"><SPAN style="FONT-SIZE: 12pt"><IMG
style="FLOAT: left; MARGIN-RIGHT: 2px" hspace=5 alt=StoveCampFood
align=left
src="http://aprovecho.org/lab/images/stories/Newsletters/StoveCampFood.JPG"
width=350 height=263>The progress with the TLUDs was impressive.
Several of the stoves worked well with different fuels and had
adequate turn down ratio. Paul Anderson helped everyone to
understand TLUD mechanics and air control. He was joined by Ron
Larson, Art Donnelly, and others who are evolving the TLUD
approach.</SPAN></P>
<P style="TEXT-ALIGN: left"><SPAN style="FONT-SIZE: 12pt">There is
so much work that any motivated person could do, solving problems
of the poor and moving humanity towards a more fulfilling and
elegant future. Dean joked that even a monkey could follow the
iterative design method and would eventually come up with
innovative solutions to issues such as food drying,
desalinization, solar heating, and stoves. All it takes is making
a change or two per day in the prototype and seeing if it performs
better or worse. That’s what we do here at Aprovecho and we hope
that it catches on.</SPAN></P>
<P style="TEXT-ALIGN: left"><SPAN
style="FONT-SIZE: 12pt">Sincerely,</SPAN></P>
<P style="TEXT-ALIGN: left"><SPAN style="FONT-SIZE: 12pt">The
Aprovecho Team</SPAN></P><BR></TD></TR>
<TR>
<TD style="TEXT-ALIGN: center" vAlign=top>
<P><SPAN style="FONT-SIZE: 10pt">Photos by Simon Anderson and
Sanya Detweiler. Aprovecho Research Center is a lab based in
Cottage Grove, OR--visit the main <A
href="http://aprovecho.org/lab/index.php"
target=_blank>website</A> for more information. Please email <A
href="mailto:sanya@aprovecho.org"
target=_blank>sanya@aprovecho.org</A> regarding subscription to
these
updates.</SPAN></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><IMG
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