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<DIV><FONT size=2 face=Arial>Dear Crispin</FONT></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px"
dir=ltr>
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=crispinpigott@gmail.com href="mailto:crispinpigott@gmail.com">Crispin
Pemberton-Pigott</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org">Stoves</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Friday, August 05, 2011 11:15
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] Wood fired,
two-stage gasification employed</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoPlainText>Dear Kevin<o:p></o:p></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>Picking up on one point for your
response:<o:p></o:p></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>> Accordingly, I would think that unless there is a
specific Standard that <o:p></o:p></P>
<P class=MsoPlainText>specifies the O2 level at which the CO is measured, two
different stoves or <o:p></o:p></P>
<P class=MsoPlainText>furnaces reporting the same CO levels could have very
different O2 and Smoke <o:p></o:p></P>
<P class=MsoPlainText>Spot Readings.<o:p></o:p></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>There is a difference in understanding here. It is not
that the dilution level is set and then measurements taken, it is just a
reporting method so that measurements taken with different levels of dilution
can be fairly judged.</P>
<P class=MsoPlainText> </P>
<P class=MsoPlainText><FONT face=Arial><FONT size=2># I do get your point
here. The problem is that devious and misleading Stove Producers can quote
results for their stove that give very low apparent CO levels, by simply
increasing the dilution rate. ("The solution to pollution is dilution.")
Unless teh degree of dlution is specified, the stated results can be more or
less meaningless.</FONT></FONT></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>If you recall there was a conversation some time ago
here, I think it was about the time you joined the stove list, about measuring
CO using a CO meter and it was found by some that they have 'reduced CO'. In
fact the excess air might have been increased, not the CO reduced. As the
reporting method was 'CO in ppm' it told us nothing about the actual CO being
produced. Things have come a long way since then in stove testing in most
quarters.</P>
<P class=MsoPlainText> </P>
<P class=MsoPlainText><FONT face=Arial><FONT size=2># I don't recall teh
specific discussion, but I get the point. Also, while stove testing
capabilities have come a long way, those capabilities are not necessarily
used properly, or teh results are not necessarily presented
properly</FONT></FONT><o:p><FONT size=2 face=Arial>, to show the true and real
capabilities of a specific stove. Recall your discussions about the general
lack of meaning of some generally accepted stove testing
methods.</FONT></o:p></P>
<P class=MsoPlainText><o:p><FONT size=2 face=Arial></FONT></o:p> </P>
<P class=MsoPlainText>A couple of years ago I was asked to test a new 'coal
briquette' which claimed to have not only 'reduced CO' but also 'reduced CO2'.
That I just <I>had</I> to see! So it turns out they had taken the product to
an air quality testing lab and the guy testing it measured the absolute
concentrations of CO and CO2 in the air above the product when it was burning,
as well as a small pile of coal. The briquette had higher excess air so he
reported that it had ‘significantly lower CO2 output’. As some people now
believe that CO2 is a ‘pollutant’ along with the well-known CO, they were
claiming a dramatic reduction because their coal didn’t produce much CO2. The
mind boggles. </P>
<P class=MsoPlainText> </P>
<P class=MsoPlainText><FONT face=Arial><FONT size=2># A lot of that sort of
thing goes on.<o:p></o:p></FONT></FONT></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>The method you describe to get the minimum smoke from an
oil burner is a test of the burner, not the fuel, as you can imagine. The idea
is sound. I wonder if the nanoparticle count can somehow be assessed.</P>
<P class=MsoPlainText> </P>
<P class=MsoPlainText><FONT face=Arial><FONT size=2># Yes... the fuel is
constant, and only burner adjustment changes. The "Smoke Spot Test", along
with stack temperature, and an Orsat Analysis of the flue gas can tell the
furnace/stove efficiency. However, I do not think this system would be good
for nanoparticle measurement, in that tehre is nothing in that system that can
capture and measure nanoparticles.</FONT></FONT></P>
<P class=MsoPlainText> </P>
<P class=MsoPlainText><FONT size=2 face=Arial>Would your fundamental concern
be addressed if teh results were presented as:</FONT></P>
<P class=MsoPlainText><FONT size=2 face=Arial>"Grams of CO, and grams of
Particulate Matter, per kG of fuel burned?" (or perhaps per MJ or BTU
of energy content of teh fuel?</FONT> </P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>Great paper from Philip Hopke from Clarkson Univ. Some
of you will remember him from the Bangkok roadmap conference: <o:p></o:p></P>
<P class=MsoPlainText><A
href="http://www.nyserda.org/publications/10_15_eval_energy_emissions_performance.pdf">http://www.nyserda.org/publications/10_15_eval_energy_emissions_performance.pdf</A><o:p></o:p></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>The future is small, very small!</P>
<P class=MsoPlainText> </P>
<P class=MsoPlainText><FONT face=Arial><FONT size=2># Very interesting Paper!
Thanks</FONT></FONT></P>
<P class=MsoPlainText><FONT size=2 face=Arial></FONT> </P>
<P class=MsoPlainText><FONT size=2 face=Arial>Kevin</FONT></P>
<P class=MsoPlainText><o:p> </o:p></P>
<P class=MsoPlainText>Regards<o:p></o:p></P>
<P class=MsoPlainText>Crispin<o:p></o:p></P>
<P class=MsoPlainText><o:p> </o:p></P></DIV>
<P>
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