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</o:shapelayout></xml><![endif]--></head><body lang=EN-CA link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal style='background:white'>Dear Stovers<o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'>Today the Central Asia Mountain Project Alatoo received the two demonstration stoves made in local workshops.<o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'>The refuellable Model 4 was really appreciated after demonstration. This will be reproduced immediately and heading to the mountains for field trials. <o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'>This is based on the GTZ 7 series from Ulaanbaatar (2010) and in this case is made to fit under a local cast iron top. Here is the shape and size:<o:p></o:p></p><p class=MsoNormal style='background:white'><o:p> </o:p></p><p class=MsoNormal style='background:white'><span style='mso-fareast-language:EN-CA'><img width=378 height=352 style='width:3.9333in;height:3.6666in' id="Picture_x0020_1" src="cid:image003.jpg@01D207CF.A4662CF0"></span><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>The elements of the stove are pretty obvious. The unusual thing is that the pot hole on the left is a cover for the fuel hopper. There is a white chalk line drawn on the side which is approximately the position of the angled grate that drops fuel into the combustion zone (to the right of the vertical line to the right end of the angled line). The top is 750x450mm.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>The hopper is 165x165 and the burn rate drops the fuel about 30mm per hour. Four hours after ignition this is the performance:<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='mso-fareast-language:EN-CA'><img width=227 height=183 style='width:2.3666in;height:1.9083in' id="Picture_x0020_2" src="cid:image004.png@01D207CE.0C120290"></span><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='mso-fareast-language:EN-CA'><img width=226 height=177 style='width:2.3583in;height:1.8416in' id="Picture_x0020_3" src="cid:image005.png@01D207CE.0C120290"></span><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='mso-fareast-language:EN-CA'><img width=226 height=178 style='width:2.3583in;height:1.8583in' id="Picture_x0020_4" src="cid:image006.png@01D207CE.0C120290"></span><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>These numbers are on target and I recommend them when trying to create your own high performance stoves. They are:<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>CO/CO2 ratio <1% (the indicated value is 0.04%)<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>Excess air 70-100% for coal and 80-110% for wood<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>Exhaust temperature at the roofline (or ceiling) 160</span><span style='font-family:"Tahoma",sans-serif;color:black;mso-fareast-language:EN-CA'>вк</span><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>C.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>Efficiency >70% and <85%<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>The efficiency was not all that great because the heat exchanger was shortened to reduce the length to that of the cast iron top. It was worth it – the acceptance of the shape was largely based on its conventional external appearance. Inside of course it is completely different.<o:p></o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'><o:p> </o:p></span></p><p class=MsoNormal style='background:white'><span style='font-family:"helvetica neue",serif;color:black;mso-fareast-language:EN-CA'>Here is the stove with the top removed. The rope is the sealing material between the top and the body. The hopper is, very importantly, isolated from the rest of the stove.<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>The fuel capacity us 8.5 kg and the burn time is about 16 hours (as tested on the weekend).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Regards<o:p></o:p></p><p class=MsoNormal>Crispin <o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p></div></body></html>