[Stoves] Fine Particulates from a Selection of Cookstoves

Thu Jun 1 00:29:19 CDT 2017

Dear Paul

I generally concur with your comments about the selection. Jim, I have a suggestion: how about asking the stovers for recommendations for models and then do another set of tests?

I am particularly pleased to see some parallel tests using far more realistic fuel moisture choices. I don't believe anything about emissions from a stove using fuel with 5% a moisture content. ‎Fuel moisture has a powerful influence on emissions of PM and VOC's.

I would recommend stoves that have had at least 1000 sales on a commercial basis (excludes stoves bought by an org and given away) and those which are seen by 'us' to be representative of the state of the art.

Included in that category are the TLUD made by Sujatha and one or more models from Prime and Dr Nurhuda.

Regards
Crispin

Stovers,

I previously asked:
On 5/31/2017 11:22 AM, Paul Anderson wrote:

11 fuel-stove combinations covering a variety of fuels and different stoves are investigated for UFP emissions and PNSD.
I am interested in knowing if those 11 included what I consider to be the better versions of TLUD stoves, both natural draft and forced air.

I have now seen the article, and provide comments ABOUT THE STOVES SELECTED.   This is NOT about the quality of measurements, etc.

1.  For purposes of review comments, I am allowed to provide some selected information from  the publication:

[cid:part1.C65C41C9.C10D9825 at ilstu.edu]
**********************************
Of interest (to me) are numbers 4, 6, 10, and 11.
 #4.  Stove Tec Prototype.  Lousy choice to be representing TLUD-FA stoves.  This is old by TLUD standards.
It was tested years ago with great results.   Only one unit ever made, as far as I know..

#6.  Belonio TLUD-FA (or FD) with rice husk fuel.  Poor choice.  Again, an older stove that did not go into
[much] production, and using a non-woody fuel when all other comparisons of solid fuels are wood.

#10.  Although Philips, it is a rocket stove, and not of main interest.
#12.   The Philips high-turbulance fan-jet stove.   This is NOT designed for nor used in TLUD fashion.

Net result:  This research tells us information that is of very little use and is not representative of the state of
the art of TLUD stoves, whether FA or ND.

***************************************
Crispin also guided me to another study by essentially the same group:
"Polycyclic Aromatic Hydrocarbons in Fine Particulate Matter Emitted
from Burning Kerosene, Liquid Petroleum Gas, and Wood Fuels in
Household Cookstoves"
Guofeng Shen,† William Preston,‡ Seth M. Ebersviller,§ Craig Williams,‡ Jerroll W. Faircloth,∥
James J. Jetter,*,⊥ and Michael D. Hays⊥

The solid-fuel (wood) stoves in this study were
"(iii) wood (10 and 30% moisture content on a wet basis) in a forced-draft fan stove, and (iv) wood
in a natural-draft rocket cookstove."

Rockets did not do well (and not an issue with me).   But the "forced-draft fan stove" that also was not optimal is
of interest to me.   What TLUD-FA stove did they choose?   An "Eco-chula XXL" which is seen at:
http://www.ecochula.co.in/xxl.html

I my opinion, that was a terrible choice, (large diameter gives worse emissions, and is not representative of household cooking) and therefore the TLUD-FA  results of this study are not representative.   From the TLUD perspective, this study only contributed to the PERCEPTION (erroneous in my opinion) that TLUD-FA stoves are not very good.

The Mimi Moto TLUD-FA has been available since 2015.   That would have been a much better choice.
And certainly the Champion TLUD-ND  (available since about 2008) is the best choice for that category stove, but is never included.

FYI, Except for the BEIA project in Uganda with the Mwoto TLUD-ND, I have never been asked about what TLUD stoves might best be include in testing or in research projects.    Never.      Not by EPA or CSU or Aprovecho or Berkeley or D-Lab or anyone else.

Paul

Doc  /  Dr TLUD  /  Prof. Paul S. Anderson, PhD
Email:  psanders at ilstu.edu<mailto:psanders at ilstu.edu>
Skype:   paultlud    Phone: +1-309-452-7072
Website:  www.drtlud.com<http://www.drtlud.com>

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