[Stoves] [stove] Comparison of stove testing procedures

[Paul Anderson]

Stovers,

Below is the abstract of a significant comparative study done in 
China.   We thank Kirk Smith and his Stove list (different from StoveS) 
for the information.

Spoiler alert:   Here is the punch line from the abstract:
> Statistically significant differences
>
> between the two [China and Internatonal WBT] protocols indicate the 
> need for further efforts in emission tests and methodology development
>
> before the release of a well-accepted international testing protocol.
>

Yes.  Should we be surprised.   It seems that some entities in the 
international leadership of clean cookstoves might be pushing for one 
test without sufficient attention to alternative testing methods.

Note (in abstract) that:
> With longer burning duration and higher
>
> power, the Chinese WBT had statistically higher efficiencies, gas 
> temperature, and lower pollutant emissions
>

Sure!!!   Change the duration and power, expect different test results!!!

What is clear to me is that there should never be only one set of 
tests.   People around the world have very different ways of cooking.  
High power in China, plancha stoves in Central America, two-arm cooking 
of thick foods in parts of Africa, long-simmering bean-meals vs. quick 
boil of rice meals, and on and on.   The people we are trying to serve 
want solutions that are appropriate for their circumstances.

Observation:  There seems to be a slow-down in the seeking of stove 
testing at the major testing centers that have equipment.   I can be 
shown to be incorrect if any testing centers would give us some 
statistics of numbers and types of tests that are being requested.

Of course I like the importance of emissions testing because the TLUDs 
and other micro-gasifiers consistently give superior results.   But most 
funding in the past has gone to less-qualified stoves.

Paul

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

On 3/17/2016 1:08 PM, Kirk R. Smith wrote:
>
> Can be downloaded from the website below/k
>
> Efficiencies and pollutant emissions from forced-draft biomass-pellet 
> semi-gasifier stoves: Comparison of International and Chinese water 
> boiling test protocols
>
> Yuanchen Chen, Guofeng Shen, Shu Su, Wei Du, Yibo Huangfu, Guangqing 
> Liu, Xilong Wang, Baoshan Xing, Kirk R. Smith, Shu Tao
>
> Energy for Sustainable Development 32 (2016) 22–30
>
> Ab s t r a c t
>
> Biomass fuels are widely combusted in rural China, producing numerous 
> air pollutants with great adverse
>
> impacts on human health. Some improved cookstoves and pellet fuels 
> have been promoted. To evaluate the
>
> performance of pellet-gasifier stoves, efficiencies and pollutant 
> emissions were measured following International
>
> and Chinese water boiling tests (WBTs). Compared with traditional 
> stoves and unprocessed biomass fuels,
>
> increased efficiencies and lower emissions of pollutants including 
> carbon monoxide (CO), particulate matter
>
> (PM), parent and derivative polycyclic aromatic hydrocarbons (PAHs) 
> were revealed for pellet-gasifier stoves.
>
> However, the calculated emission rates (ERs) of CO and PM2.5 cannot 
> meet the ER targets recently suggested
>
> by WHO indoor air quality guidelines (IAQGs). Better control of air 
> mixing ratio and gross flow rates of primary
>
> and secondary air supply greatly reduced emissions and increased 
> efficiencies. Differences among testing protocols
>
> are the key factors affecting the evaluation of stove performance. 
> With longer burning duration and higher
>
> power, the Chinese WBT had statistically higher efficiencies, gas 
> temperature, and lower pollutant emissions
>
> (p b 0.10) compared to those obtained through the International WBT. 
> Statistically significant differences
>
> between the two protocols indicate the need for further efforts in 
> emission tests and methodology development
>
> before the release of a well-accepted international testing protocol
>
> ---------------------------
> Kirk R. Smith, MPH, PhD
> Professor of Global Environmental Health
>
> Chair, Graduate Group in Environmental Health Sciences
> Director of the Global Health and Environment Program
> School of Public Health
> 747 University Hall
> University of California
> Berkeley, California, 94720-7360
> phone 1-510-643-0793; fax 642-5815
> krksmith at berkeley.edu
> http://www.kirkrsmith.org/
>
>
>
> To unsubscribe from this list go to:
> https://calmail.berkeley.edu/manage/list/reminder/stove@lists.berkeley.edu

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