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Dear Roger and Bridget,<br>
There's really no reason to be offended. Your video shows a great
deal of winsomeness and demonstrates a beautiful little stove. I
hope you can recognize that it's not really priced for the rural
Indian market.<br>
<br>
A couple of observations occur to me. First, there seems to be some
confusion about heat transfer in your presentation. I hope that I
calculate correctly that the maximum heat output is something around
8.8kW. The typical electrical stove-top heating field where I live,
will on one of the cooking positions have a _significantly_ lower
heat output than your stove; therefore, it is quite appropriate to
turn the stove way down in order to cook. That, however, this is
true, says something about this feature. What it says to me, and I
may be quite wrong, but throw it into the discussion round as a
thoroughly neutral observation is the following: Excess air
conditions, which may be completely appropriate for the primary
ignition --> steady state phases of a
fueling/ignition/burning-cycle, explain why the stove top is not so
hot for cooking when the air intake is set on max. I think it also
at least _likely_ that under some conditions the max-air setting may
also be detrimental to the exhaust air quality. My assumption in
stating this is that it is likely that the incoming excess air is
lowering the temps in the secondary burn area of the stove thus
making for suboptimal completion of gas reactions.<br>
<br>
Secondly, since it isn't transparent for me what the heat value of
your fuel actually is, I can't calculate what the heat output of the
stove into the room is for the time of 6-10 hours at the low
setting. I think that value would be quite helpful for someone
thinking about purchasing such a stove for the intended boat,
trailer or portable home (yurt or whatever) situation. The
respective flue temps would also be helpful for such a calculation
and consideration.<br>
<br>
Thanks for the video.<br>
<br>
regards,<br>
ronald von momentansonnigbayern<br>
<br>
<br>
On 08.02.2012 08:37, Fireside Hearth wrote:
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Dear Xavier, <br>
<br>
I should be offended, but alas, I will send you a video
link instead........yes our stove has a chimney!<br>
<br>
<font style="font-size: 10pt;" size="2" face="Tahoma "><a
moz-do-not-send="true"
href="http://www.youtube.com/watch?feature=player_detailpage&v=vkz6gKLayvc">http://www.youtube.com/watch?feature=player_detailpage&v=vkz6gKLayvc</a><br>
<br>
Roger and Bridget Lehet.<br>
</font><br>
<div>> From: <a class="moz-txt-link-abbreviated" href="mailto:xvr.brandao@gmail.com">xvr.brandao@gmail.com</a><br>
> To: <a class="moz-txt-link-abbreviated" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a><br>
> Date: Tue, 7 Feb 2012 23:59:35 +0100<br>
> Subject: [Stoves] Grates and chimneys<br>
> <br>
> " It is unfortunate that people produce stoves that have
chimneys, but are<br>
> not actually clean-burning."<br>
> Do we actually have chimney stoves that do not clog up
after few<br>
> months/years? Even the cleanest stoves? Is it a good idea
to build chimney<br>
> stoves at all?<br>
> <br>
> "Your grate price is good! I think we should be jealous!
It would be so<br>
> nice to be able to get good parts in cast iron."<br>
> Hell yes, I can make 1 dollar iron grates, but I wish we
could make 1 dollar<br>
> cast iron grates in Benin. In fact, cast iron is very
rare in Benin (West<br>
> Africa? Africa?). When Africa will have the industrial
production capacities<br>
> of Asia, things will change!<br>
> <br>
> <br>
> <br>
> -----Original Message-----<br>
> <br>
> Message: 4<br>
> Date: Tue, 7 Feb 2012 00:14:57 -0500<br>
> From: "Crispin Pemberton-Pigott"
<a class="moz-txt-link-rfc2396E" href="mailto:crispinpigott@gmail.com"><crispinpigott@gmail.com></a><br>
> To: "'Discussion of biomass cooking stoves'"<br>
> <a class="moz-txt-link-rfc2396E" href="mailto:stoves@lists.bioenergylists.org"><stoves@lists.bioenergylists.org></a><br>
> Subject: Re: [Stoves] advice for chimney wood stove for
rural Burkina<br>
> Faso<br>
> Message-ID:
<a class="moz-txt-link-rfc2396E" href="mailto:015301cce557$70642af0$512c80d0$@gmail.com"><015301cce557$70642af0$512c80d0$@gmail.com></a><br>
> Content-Type: text/plain; charset="us-ascii"<br>
> <br>
> Dear AD<br>
> <br>
> <br>
> <br>
> Your story is not very unusual. It is unfortunate that
people produce stoves<br>
> that have chimneys, but are not actually clean-burning.
My point is that<br>
> just because one produces a chimney stove is no excuse
not to use that<br>
> additional expense to create the draft needed to
completely burn the fuel.<br>
> Astonishing really. <br>
> <br>
> <br>
> <br>
> I wonder if there is too much emphasis on 'clean indoor
air' without enough<br>
> emphasis on 'not needing to worry about clean indoor air'
in the first<br>
> place. <br>
> <br>
> <br>
> <br>
> That level of deposition is depressing. I heard about a
stove being produced<br>
> in the tea country high in Kenya which is used for space
heating and<br>
> cooking, According to the designer the 3 inch chimney
would clog after three<br>
> months. That is ridiculous! What kind of crummy
combustion is that?<br>
> <br>
> <br>
> <br>
> A chimney is as good as a fan - especially 3.5 metres.
Fan stoves are<br>
> supposed to be really clean or you have not done a good
job. Shoving bad<br>
> combustion outside does not solve much. The situation in
Ulaanbaatar is<br>
> exactly like that. No one has a stove without a chimney.
The air outside is<br>
> so polluted that it is contaminating the air drawn into
the homes. So the<br>
> chimney solved nothing - the problem is the stove.<br>
> <br>
> <br>
> <br>
> Your grate price is good! I think we should be jealous!
It would be so nice<br>
> to be able to get good parts in cast iron.<br>
> <br>
> <br>
> <br>
> Thanks<br>
> <br>
> Crispin<br>
> <br>
> <br>
> <br>
> <br>
> _______________________________________________<br>
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