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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-CA link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Paal<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Many thanks for those details. It is not perhaps know that I forward a lot of information to people who write to me privately so I maintain a huge library of technical information and usually it gets use.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It is very important that in order to bring the stove community into the work of thermal power engineering that we learn to talk the talk and the emissions per unit of energy are what we have to learn to sue.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Thanks for your energy used figure for the test. I will be able to use the CO2 emitted and the total energy to calculate what the fuel probably is, and what the emissions are per MJ. Emissions per kg are not as helpful because you cannot compare stoves using different fuels unless it is first reduced to energy (MK or kJ are common). <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>With this in mind, what does:<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>>PM to Cook 5L (1500 223.1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>>15,000/25,000mkJ <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Mean? I am not sure if the mkj figure goes with the 223.1.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>223.1 milligrams?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>We need the emissions stated as nnn mg/MJ. That people understand. What you do when cooking is up to you but the emissions need to be expressed in ‘normal’ terms. The word normal of course means different things in different industries. Coal burning people have a really strange set of expressions that do not match other fuels. As we have to accommodate all sorts of fuels, even in the same stove. In order to make meaningful comparisons, we need the common denominators across the board.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>For example the performance of a traditional Mongolian wood stove, burning coal, gives about 300 mg/MJ of PM 1.0. (it doesn’t make any PM10 and nearly n PM2.5 either).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>By very slightly changing the way the stove allows the gases to exit the combustion chamber ($1.00) and changing the way the stove is lit to approximate a TLUD, the emissions are reduced by 80% or more! Amazing. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>When we compare the same stove burning wood and coal, we are not using the metrics common in the emergent stove community nor the coal industry, but the ones used in industry and science labs where energy is measured and discussed. It is SO much easier now to make comparisons between ethanol, wood, coal, paraffin, dung, peat and pellet burning stoves – or any fuel combination. Interesting, neh?<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Keep up the good work Paal. I have been following your work for 22 years since I first heard about it. It is very important that you try to publicise the dimensions. People should not have to re-invent the “Paal”!<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best regards<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Crispin in warm Ulaanbaatar (it was +2 today!)<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> stoves-bounces@lists.bioenergylists.org [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Paal wendelbo<br><b>Sent:</b> 04 December 2010 19:17<br><b>To:</b> Discussion of biomass cooking stoves<br><b>Subject:</b> Re: [Stoves] K Smith Article in Energy for Sustainable Development<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Grispin<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>To your infomation if Dean dont' have the exact figures by hand the TLUD-ND I made at Stove Camp 2009 had the following settings. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'> The combustion chamber had a diameter 150mm and was 180 h<o:p></o:p></span></p><ul style='margin-top:0cm' type=disc><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>55 mm free space from concentration lid up to the pot<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>105 mm hole in concentration lid<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>6 mm split between concentration lid and top of thee combustion chamber - 4x15mm for the stand for 2<sup>nd</sup> air<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>5 five mm holes 75 mm up from the bottom on the side of the combustion chamber <o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>5 five mm holes 25 mm up from the bottom on the side of the combustion chamber <o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>13 five mm holes at the bottom plate for 1<sup>st</sup> air<o:p></o:p></span></li><li class=MsoNormal style='mso-list:l0 level1 lfo1'><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>15 mm space between combustion chamber an cover for preheating of 2<sup>nd</sup>.air</span><o:p></o:p></li></ul><div><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>The combustion chamber was filled with 1kg of wood pellets and a complete 5 wbt carried out.with following result.<o:p></o:p></span></p></div><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Fuel to Cook 5L <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>(8 50/1500) g 768.8<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>CO to Cook 5L (20) 23.0<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>PM to Cook 5L (1500 223.1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>15,000/25,000mkJ <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Energy to Cook 5L 14,807<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Time to boil 5 litres min 28.1<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>CO2 to Cook 5L 708.6<o:p></o:p></span></p><p class=MsoNormal> <o:p></o:p></p><p class=MsoNormal><span lang=EN-GB style='font-size:10.0pt;font-family:"Arial","sans-serif"'>Regards Paal W</span><span lang=EN-GB> </span><o:p></o:p></p></div></body></html>