[Stoves] Stoves Digest, Vol 131, Issue 14

[Norbert Senf]

> Message: 1
> Date: Sun, 25 Jul 2021 17:49:05 +0100
> From: ajheggie at gmail.com
> (snip)


Hi Andrew:
Some additional observations based on your last comments:

PM 2.5 is a subset of PM 10. Woodsmoke is actually 99% PM 1.0 (or smaller).
Coming onto the scene and not much studied yet are nanoparticles. These
don't
have any weight to speak of.

Conversion factors for PM were hard to find. I have a rough calculator now
in Excel that
has checked out reasonably well.
At 75% efficiency (HHV) and normalized to 13% O2,
1 g/kg =  85.5 mg/m3 at standard temperature and pressure
=  0.194 lb/MMBtu
= 83.4 mg/MJ

>From masonry heater observations, flame quenching (lots of air, fire is
starting, flames hit cold surface)
gives us soot (elemental carbon) and the smoke is light grey to black

Blue smoke is tar. Like with cigarette smoke (smoldering combustion), the
particles are small enough to refract light, which causes the blue color.

Norbert

-- 
Norbert Senf
Masonry Stove Builders
25 Brouse Road, RR 5
Shawville Québec J0X 2Y0
819.647.5092
www.heatkit.com
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