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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 align="right" hspace="5" style="margin-left:2px;float:right" alt="Sidwell_StoveCamp" height="0" width="350" src="http://aprovecho.org/lab/images/stories/Newsletters/Sidwell_StoveCamp.JPG"><span style="font-size:12pt"><img align="right" hspace="5" style="margin-left:2px;float:right" alt="Sidwell_StoveCamp" height="263" width="350" src="http://aprovecho.org/lab/images/stories/Newsletters/Sidwell_StoveCamp.JPG">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 align="left" hspace="5" style="margin-right:2px;float:left" alt="Dona_Dora" height="350" width="NaN" src="http://aprovecho.org/lab/images/stories/Newsletters/Dona_Dora.jpg"><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 align="right" hspace="5" style="margin-left:2px;float:right" alt="Dr_TLUD_Graph" height="421" width="350" src="http://aprovecho.org/lab/images/stories/Newsletters/Dr_TLUD_Graph.jpg"><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 align="left" hspace="5" style="margin-right:2px;float:left" alt="StoveCampFood" height="263" width="350" src="http://aprovecho.org/lab/images/stories/Newsletters/StoveCampFood.JPG">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>
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<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>
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