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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>All,</span><o:p></o:p></p><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>The TLUD-ND stove which we further developed at Aprovecho Research Center in March was tested at the Lawrence Berkley Lab. Results are attached. The photo of the computer screen showing the full power 6+kw graphs was taken by Ashok Gadgil. They have a good team doing the tests.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>The stove is in route to Aprovecho RC where it will be photographed and drawings will be made. Apro will then update their free online tier 4 stove book from the old TLUD-ND design to include this new design. I am updating the written stove description.</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>The designs are being put into the public domain. I hope that the various principles used in the stove, for turn-down and improved efficiency and emissions, will benefit some new stove designs in the future. </span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>The fuel used was Douglas fir pellets. The highest power achieved was 6+ kw with some cushion above that. The low power is 1.6 kw with some cushion below that. The turn-down is then 4 to 1. Five kw seems to be the highest very clean power level. The high power used in the tests was around 3.25 kw. At these turn-down levels the ambient room temperature makes a big difference in performance. At 24C room temperature there was no problem keeping the water in the 93C to 97C test simmering range. At 30C room temperature the simmering water temperature could not be held below 97C. The pot skirt had to be raised to release some heat to maintain the test temperature. This is possibly what lead to the tier 3 rating for low power specific consumption. The catch 22 is that the more efficiently heat is given to the pot, the lower the stove has to be turned down to maintain a simmer. </span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Kirk</span><o:p></o:p></p></div><div><p class=MsoNormal> <o:p></o:p></p></div><div><p class=MsoNormal><span style='font-size:10.0pt;font-family:"Arial",sans-serif'>Santa Rosa, CA. USA</span><o:p></o:p></p></div></div></body></html>