[Stoves] SPAM: Re: Chart of breathable particles

Erin Rasmussen erin at trmiles.com
Tue May 24 16:12:00 CDT 2011


Hi Peter,

Thank you for your feedback! I'd love to know of any better references for
the particle sizes of some of the items on the chart?  I'd love to fix my
mistakes. 

Then I'll be happy to update the web site and the list with the changes.

Thanks,
Erin Rasmussen
erin at trmiles.com

-----Original Message-----
From: stoves-bounces at lists.bioenergylists.org
[mailto:stoves-bounces at lists.bioenergylists.org] On Behalf Of Peter DeCarlo
Sent: Friday, May 20, 2011 12:27 PM
To: stoves at lists.bioenergylists.org
Subject: SPAM: Re: [Stoves] Chart of breathable particles

Hi All,

I think there is good utility in putting together this information however,
I'm a little confused by the data in the chart.   I think there may be some
unit issues.  Where exactly did the data come from?  I couldn't find it in
the papers listed at the bottom of the chart. For example human hair in the
chart is on the scale of a micron, when it should be more like hundreds of
microns a millimeter or so.  Similarly smog size range is more from 10s of
nanometers (0.01 microns) to 1 micron, but is smaller than that in the
graphic (several other ones too). I don't want to be too nit-picky here, but
the information just doesn't seem quite right.

In response to the question of whether we can separate out BC and OC in the
size chart, I'm not sure that's really advisable since the BC and OC are
nearly always a mixture, implying it isn't really physically meaningful to
have different sizes for the each component if they are part of the same
particle.

Just my 2 cents.

-Pete





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