[Stoves] Ulaanbaatar Air Quality

Alex English english at kingston.net
Fri Nov 8 05:43:46 CST 2013


Crispin,

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?

Alex

On 06/11/2013 3:38 PM, Crispin Pemberton-Pigott wrote:
>
> Dear Friends
>
> 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.
>
> Usually in November the city air has between 500 and 4000 µg of PM2.5
>
> If you visit https://twitter.com/UB_Air you can see Prof Lodoysamba's 
> twitter feed which Tweets the number every 3 hours, every alternate day.
>
> It has almost reached 600 but that is a far cry from two years ago.
>
> There is a (slightly misleading) article from the Guardian at 
> http://www.theguardian.com/world/2013/oct/20/ulan-bator-killer-winter-stoves 
> which discusses the air quality issue.
>
> 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.
>
> Anyway, publicity is not wrong when it comes to cleaner air!
>
> 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.
>
> Regards
>
> Crispin
>
>
>
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