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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>Dear Crispin,<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>50 grams per cu meter is a lot of stuff. I wonder what a cigarette is? <o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>So all the heat that goes in the room is ‘good’ heat and that leaving the room is lost heat to do the calculations? Is the height where the inside-outside heat standard or site specific? <o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>The compressor taking in CO2 free air is making the dilution? What is used to scrub the CO2 from the air? The CO2 produced is measured real time(?) using IR detection? <o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>If CO2 is produced at varying concentrations as the fuel combusts how is it used as a measure of air dilution? <o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>Thanks<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'>Frank<o:p></o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>Thanks <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>Frank Shields<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>BioChar Division<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>Control Laboratories, Inc. <o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>42 Hangar Way<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>Watsonville, CE 95076<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>(831) 724-5422 tel<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>(81) 724-3188 fax<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'><a href="mailto:frank@biocharlab.com"><span style='color:blue'>frank@biocharlab.com</span></a><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:12.0pt;color:#7030A0'>www.controllabs.com<o:p></o:p></span></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><p class=MsoNormal><b><span style='font-size:14.0pt;color:#7030A0'><o:p> </o:p></span></b></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0in 0in 0in'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <b>On Behalf Of </b>Crispin Pemberton-Pigott<br><b>Sent:</b> Monday, June 03, 2013 11:25 AM<br><b>To:</b> 'Discussion of biomass cooking stoves'<br><b>Subject:</b> Re: [Stoves] SEET Lab in Ulaanbaatar running again in its new home<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Dear Frank<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Thanks. The burn room is a bit small (the stoves run up to 30 kW) but the instrument room is large. We often have a lot of visitors so 20 people can easily fit in the room to see the whiteboards.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>The stoves all have chimneys so a gas sample is drawn from the chimney. The temperature at the height at which the chimney exits the living space (the ‘heated envelope’) is recorded to calculate the thermal efficiency of the system as a whole.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>A hood can be used with small stoves (which are thought of as ‘picnic stoves’!) connected to the chimney which is what is done at the SeTAR Centre.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>There are several humming motors and the compressor and CO2 adsorber is not in the same room (noisy). You can see the diluter stuck into the lower end of the chimney. This is fed dry air that reduces the copious moisture level to something that will not condense. We don’t want to measure ‘fog’ as ‘particles’. The dilution is variable at the touch of a needle valve. The dilution is monitored by tracking the level of CO2 in the stack and diluter – a good suggestion made by Tami Bond some year ago. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Last week we managed to measure smoke that reached 50 grams per cubic metre of air (undiluted), far beyond our previous record of 17. Fifty million micrograms is a heck of a snort for a lab to deal with. We are looking at ways to reduce the amount of moisture and volatile vapours in the while system. If we can get it out early, it makes everything last a heck of a lot longer.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Regards<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'>Crispin<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-CA style='color:#1F497D'><o:p> </o:p></span></p></div></body></html>