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<div class="moz-cite-prefix">Crispin,<br>
<br>
This may be an affront to your technical cred, but if you could
humour me with an educated guess, I have a question. How much of
the improvement/reduction in emissions is due to 'top ignition',
better start up and how much is due to improved steady state
combustion?<br>
<br>
Alex<br>
<br>
On 06/11/2013 3:38 PM, Crispin Pemberton-Pigott wrote:<br>
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<p class="MsoNormal">Dear Friends<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The air quality of Ulaanbaatar is famously
bad because of the ignition of coal stoves. The majority of
stoves have been swapped for very much cleaner burning ones
and the impact is dramatic.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Usually in November the city air has
between 500 and 4000 µg of PM2.5<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you visit <a moz-do-not-send="true"
href="https://twitter.com/UB_Air">https://twitter.com/UB_Air</a>
you can see Prof Lodoysamba’s twitter feed which Tweets the
number every 3 hours, every alternate day. <o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:8.0pt;font-family:"Garamond","serif";color:black;mso-fareast-language:EN-CA"><o:p> </o:p></span></p>
<p class="MsoNormal">It has almost reached 600 but that is a far
cry from two years ago.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">There is a (slightly misleading) article
from the Guardian at <a moz-do-not-send="true"
href="http://www.theguardian.com/world/2013/oct/20/ulan-bator-killer-winter-stoves">http://www.theguardian.com/world/2013/oct/20/ulan-bator-killer-winter-stoves</a>
which discusses the air quality issue.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It says the rise in patients with
respiratory illnesses from 2004-2008 is deteriorating air but
it is far more likely to be the huge increase in population –
the air was the same from 2004-2008. The population went from
400k to 1.2m in 15 years. <o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Anyway, publicity is not wrong when it
comes to cleaner air!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Note the feedback from consumers. The photo
is of one of the ‘approved’ new stoves. It is a TLUD with
controllable secondary and primary air. Note the very large
ring that can be removed to accommodate huge woks. The
materials used are cast iron, sheet metal and ceramic.<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>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
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