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<body class='hmmessage'><div dir='ltr'>Dear A.D.Karve and Crispin,<div><br></div><div>I agree with Karve, I think the primary air not consumed in the primary burning is used in the flame zone to burn the gases.</div><div><span style="font-size: 12pt;">I think this is some kind of "balanced point" I've found that maybe only works on high power mode: as I am powering an oven, </span><span style="font-size: 12pt;">I use this stove on high power mode almost always. I haven't tried enough in low power mode.</span></div><div><br></div><div>Crispin, yes, I do have a grate under the tips of the sticks, and I do normally burn the charcoal. Only ashes are left.</div><div><span style="font-family: Calibri, 'Slate Pro', sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">When you say "make an opening at the back of the stove to admit the air" I wonder: still more primary air? Why this hole?</span></div><div><br></div><div>Yes, the excess air maybe dilutes the smoke and this may be the reason I don't see it. Maybe some day I'll get a combustion analyser, but prices are still too high for me.</div><div><br></div><div><span style="color: rgb(31, 73, 125); font-family: Calibri, 'Slate Pro', sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);">Thanks</span></div><div><span style="color: rgb(31, 73, 125); font-family: Calibri, 'Slate Pro', sans-serif; font-size: 15px; background-color: rgb(255, 255, 255);"><br></span></div><div><span style="font-size: 12pt;">> Date: Sat, 6 Jun 2015 09:25:39 +0530</span></div><div><div>> From: adkarve@gmail.com<br>> To: stoves@lists.bioenergylists.org<br>> Subject: Re: [Stoves] Lots of primary air<br>> <br>> Dear Marc,<br>> <br>> It seems that all the oxygen in the primary air is not consumed at the<br>> point where the wood is burning and that the leftover oxygen is<br>> utilized for burning the volatiles in the flame.<br>> <br>> Yours A.D.Karve<br>> ***<br>> Dr. A.D. Karve<br>> <br>> Chairman, Samuchit Enviro Tech Pvt Ltd (www.samuchit.com)<br>> <br>> Trustee & Founder President, Appropriate Rural Technology Institute (ARTI)<br>> <br>> <br>> On Fri, Jun 5, 2015 at 5:44 PM, Marquitusus <marquitusus@hotmail.com> wrote:<br>> > Hi to all,<br>> ><br>> > Running my rocket stove, which is under a low-mass mud oven (which allows to<br>> > clearly see if I the stove produces smoke or not) I have always observed<br>> > that the cleanest burning happens when the primary air is not obstructed by<br>> > ashes or coals. Also in all the rocket stoves I have seen, it is mantain the<br>> > air entrance free from obstacles for them to burn clean. The more primary<br>> > air, the less smoke.<br>> ><br>> > So I build a combustion chamber with a lot of space below the burning<br>> > sticks, so it can have a lot of primary air, never obstructed by ashes or<br>> > burning coals. I also put a longer combustion tube, about 50cm long, to give<br>> > the gases enough space and time to completely burn. I also put some<br>> > secondary air holes about 10cm above the burning sticks: 16 holes about 1cm<br>> > diameter each.<br>> ><br>> > The result is quite satisfactory: most of the time I have no smoke, and only<br>> > in the begining and when I put too much fuel I have smoke until the tips are<br>> > well ignited. With this cleaningness of combustion, I'm using it again to<br>> > power my oven without the fear of getting the food "blackened" due to smoke.<br>> ><br>> > I know this experience does not agree with the clean combustion "laws" about<br>> > primary/secondary air ratios of 1/4 or less, but this has really worked for<br>> > me. I've tried this configuration a lot of times in the lasts months, and<br>> > I've always found that more primary air, gives less smoke.<br>> ><br>> > What do you think about it?<br>> ><br>> > Regards,<br>> > Marc<br>> ><br>> ><br>> ><br>> > _______________________________________________<br>> > Stoves mailing list<br>> ><br>> > to Send a Message to the list, use the email address<br>> > stoves@lists.bioenergylists.org<br>> ><br>> > to UNSUBSCRIBE or Change your List Settings use the web page<br>> > http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org<br>> ><br>> > for more Biomass Cooking Stoves, News and Information see our web site:<br>> > http://stoves.bioenergylists.org/<br>> ><br>> ><br>> <br>> _______________________________________________<br>> Stoves mailing list<br>> <br>> to Send a Message to the list, use the email address<br>> stoves@lists.bioenergylists.org<br>> <br>> to UNSUBSCRIBE or Change your List Settings use the web page<br>> http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org<br>> <br>> for more Biomass Cooking Stoves, News and Information see our web site:<br>> http://stoves.bioenergylists.org/<br>> <br></div></div> </div></body>
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