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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">Kevin the rice straw story is useful, but to talk about it intelligently, or meaningfully if you prefer, it really helps to know what the moisture of the straw was in both cases. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">There is a general rule which that biomass burns best (most cleanly and completely) when it is NOT completely dry, unless you have a special combustor. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">For open fires the emissions are lowest when the moisture is in the range of 12-15%. Of course you can tune a stove to a particular and low level of moisture, as Aprovecho has shown
by tuning their role stove performance to very dry sawn rectangular sticks. But normal fuel behaves differently. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">Air dried straw may give a much better cooking experience than either fresh or totally dry straw. You can try and advise. if you can establish the moisture content of batches before
others are burned, you can compare the performance of fresh, air dried, seasoned, wrapped in tight or tighter bundles....and so on. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">Have you tried burning a vertical bundle placed in a half-round cylinder? It would give it somewhat the affect of a sheltered fire, and still be able to replace the fuel from time
to time. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">You could place a second half cylinder temporarily to make an almost-enclosure if there were a handle on it. </div>
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<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">Stay well</div>
<div name="BB10" id="response_div_spacer_BBPPID" dir="auto" style="width:100%;">Crispin </div>
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<div id="from"><b>From:</b> kevin@sun24.org</div>
<div id="sent"><b>Sent:</b> October 11, 2022 2:44 PM</div>
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<div class="gmail_default" style="font-size:small">Thanks, Crispin. I didn't think there was a shortcut. I have someone in Malawi doing this in a much cruder way with rice straw. It seems that the difference in moisture content between standing dry straw
and dry straw that is cut and allowed to dry further for another week or two may be relevant to rice stubble burning in India and elsewhere.</div>
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