[Stoves] burning woodgas

[Crispin Pemberton-Pigott]

Dear Julien

You are on the right track with the ventilation, in my opinion,  however, there is misinformation about regarding nanoparticles. (Real ones)

Below a certain size nanoparticles and inhaled and expelled again. They pass into the cell walls by diffusion, not by being trapped in the usual manner. The particles of concern are between 0.1 and 4.0 microns. It is true that the 0.01 micron particles are emitted when the combustion is very clean, however their role in disease is not at all clear, compared with the larger "respirable" set. It is a very active topic of interest.

My caution is not to take every alarming claim at face value. There are so many vested interests seeking funds. If all combustion was totally clean, there would be nearly no rain. Think about it.

Best regards
Crispin heading to Val Quentin

From: winter.julien at gmail.com
Sent: August 1, 2021 6:34 AM
To: stoves at lists.bioenergylists.org
Reply to: stoves at lists.bioenergylists.org
Subject: [Stoves] burning woodgas

Hi folks;

The emission of nano particulate matter from open-mouth TLUDs has always been a big ethical bother for me.  The 'cleaner' we make TLUDs, the more dangerous they become if they are treated as 'safe' by the users.  In that respect, emission of some smoke from a TLUD at startup and flameout could be a good thing if it discourages stove users from cooking in poorly ventilated conditions.   In Bangladesh, I have been encouraging the development of fume hoods and the incorporation of TLUDs into chimney stoves.

Cheers,
Julien

--
Julien Winter
Cobourg, ON, CANADA
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