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Dear Ron</div>
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The Mimi Moto stove used in the Inyenyeri project in Rwanda is essentially the same product as the Phillips Stove.</div>
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There was a licensed manufacturer of the Phillips stove in Maseru, Lesotho who broke away at someone and produced two other own products with a smaller number of ceramic plates in the combustion chamber.</div>
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The Peso Pe stove can be operated with a wide variety of fuels so the Tier achieved will vary with the suitability of the fuel to the stove, it's fueling cycle and the duration of the cooking session. </div>
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At least two of the stoves from Dr Nurhuda can achieve Tier 4 performance as well as other products low included in the Indonesian Stove Pilot. Nurhuda's TLUD gasifiers definitely make char. </div>
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If one wanted to produce charcoal fuel, one need look no further than Nurhuda's candle nut shell burning gasifier. The char product is excellent as fuel without a high yield as a % of dry fuel mass. Plus, there are a lot of candle nut shells in Indonesia. </div>
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As mentioned before, a Vesto can work as a char maker and might achieve Tier 4 in all categories, it will depend on the operator I suppose. </div>
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Tom, when you ask for Tier 4 performance do you mean for PM2.5 or for all categories? And do you mean as set forth as the default targets in ISO 19867-3? That document permits the creation of various sets of target performance levels as and when one wishes.
The only study I saw so far that tried to establish the actual performance and resulting exposure of the cooks to PM was by Omar Master et al. They showed that the Tier targets were too stringent by a factor 6 to 10. I.E. the emission rate was far too low
for the actual exposure v.s. the exposure estimated by the WHO's single box model. </div>
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These days, in the presence of the ISO standards, when one says "Tier 4" one has to qualify it by saying whose Tier 4, and what the stove-fuel-burn sequence was at the time. These stove can score on three different tiers depending on those variables. </div>
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Regards </div>
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Crispin </div>
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<div id="x_from"><b>From:</b> rongretlarson@comcast.net</div>
<div id="x_sent"><b>Sent:</b> January 14, 2020 8:34 PM</div>
<div id="x_to"><b>To:</b> trmilesjr@gmail.com</div>
<div id="x_reply_to"><b>Reply to:</b> stoves@lists.bioenergylists.org</div>
<div id="x_cc"><b>Cc:</b> stoves@lists.bioenergylists.org</div>
<div id="x_subject"><b>Subject:</b> Re: [Stoves] Tier 4 Biochar Stoves</div>
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<div class="PlainText">Tom and list<br>
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I am pretty sure that both the Phillips and Peko Pe are Tier 4 and CAN (but don’t normally) make char. I’ll bet both would be interested in replying. Could be others.<br>
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Ron<br>
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> On Jan 14, 2020, at 6:11 PM, Tom Miles <trmilesjr@gmail.com> wrote:<br>
> <br>
> Are there any tier 4 stoves that make biochar? World Banks is requiring Tier 4 stoves for a project.
<br>
> <br>
> Thanks<br>
> <br>
> Tom<br>
> <br>
> <br>
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