<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.19412">
<STYLE></STYLE>
</HEAD>
<BODY bgColor=#ffffff>
<DIV>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5>Dean,<?xml:namespace prefix = o ns =
"urn:schemas-microsoft-com:office:office" /><o:p></o:p></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5>I have started a list starting using your principals to which I may add
thoughts, and ideas from the list.<o:p></o:p></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5>I have already tinkered with your title, how
about?<o:p></o:p></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5>"Biomass fired appliance design principles"<SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5><SPAN
style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin">I used
“appliances” instead of stove so it will include ovens.</SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5><SPAN
style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"></SPAN><SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></FONT> </P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5>I will post the list, to the stove list, under a separate topic, after
there is a title.<SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5><SPAN
style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin">I have
put it on the back burner to simmer if you think of anything else.</SPAN><SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><FONT face=Calibri><FONT
size=5><SPAN
style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin">You may
have to show me how to give credits.</SPAN></FONT></FONT></P>
<P style="MARGIN: 0in 0in 0pt" class=MsoNoSpacing><SPAN
style="mso-bidi-font-family: Calibri; mso-bidi-theme-font: minor-latin"><FONT
size=5 face=Calibri>Lanny</FONT></SPAN><SPAN
style="FONT-FAMILY: 'Times New Roman','serif'; FONT-SIZE: 12pt"><o:p></o:p></SPAN></P></DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=deankstill@gmail.com href="mailto:deankstill@gmail.com">Dean
Still</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org">Discussion of biomass cooking
stoves</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, April 14, 2013 2:53
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] Airflow For Biomass
Fired Appliances- Natural DraftStoves</DIV>
<DIV><BR></DIV>Dear Lanny,
<DIV><BR></DIV>
<DIV>Hope you get better soon!</DIV>
<DIV><BR></DIV>
<DIV>Here are the design principles I use to tune a stove (same for Rocket,
TLUD, Fan stoves).</DIV>
<DIV><BR></DIV>
<DIV>I imagine that to get clean combustion all of the gases and smoke are
forced to enter the flame.</DIV>
<DIV><BR></DIV>
<DIV>Then the gases and smoke stay in the flame long enough to be burned
up.</DIV>
<DIV><BR></DIV>
<DIV>The very hot yellow/white flames easily make black carbon.</DIV>
<DIV><BR></DIV>
<DIV>The less hot deeper yellow/red flames make less/no black carbon.</DIV>
<DIV><BR></DIV>
<DIV>Draft is decreased or increased until the right amount of gas and smoke
is delivered to the flame for the right amount of time.</DIV>
<DIV><BR></DIV>
<DIV>Draft has a lot to do with the correct metering of fuel (gas and smoke)
into the flame: how fast gas and smoke is made and how much flame is made. I
think we want lots of flame but only the right metered amount of gas and flame
to enter the flame. </DIV>
<DIV><BR></DIV>
<DIV>Lengthening the time for combustion in the flame is good when: the
metering of fuel stays right, the air/fuel ratio stays right, and losses
through the stove body do not increase too much (good insulation.)</DIV>
<DIV><BR></DIV>
<DIV>Flame is needed to combust smoke and gas.</DIV>
<DIV><BR></DIV>
<DIV>Something like that.</DIV>
<DIV><BR></DIV>
<DIV>Best,</DIV>
<DIV><BR></DIV>
<DIV>Dean</DIV>
<DIV><BR></DIV>
<DIV><BR><BR>
<DIV class=gmail_quote>On Sun, Apr 14, 2013 at 11:25 AM, Alex English <SPAN
dir=ltr><<A href="mailto:english@kingston.net"
target=_blank>english@kingston.net</A>></SPAN> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote>
<DIV bgcolor="#FFFFFF" text="#000000">
<DIV>Lanny,<BR>I understand the comment below but I think flame height can
be shortened with excessive excess air. The lowest emissions CO/CO2 and
highest temperatures, at some power levels, in appliances that I have tested
has often been when there is a significantly taller tail of flame.
<BR><BR>However, don't believe all tall tails :)<BR>Alex<BR><BR>On
14/04/2013 1:51 PM, Lanny Henson wrote:<BR></DIV>
<BLOCKQUOTE type="cite"><BR></BLOCKQUOTE><SPAN style="FONT-SIZE: 18pt"><FONT
face=Calibri>The combustion air needs to be focused on the combustion zone
in a way that shortens the flame height. More like the way a TLUD with a fan
works.
</FONT></SPAN></DIV><BR>_______________________________________________<BR>Stoves
mailing list<BR><BR>to Send a Message to the list, use the email
address<BR><A
href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</A><BR><BR>to
UNSUBSCRIBE or Change your List Settings use the web page<BR><A
href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org"
target=_blank>http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</A><BR><BR>for
more Biomass Cooking Stoves, News and Information see our web
site:<BR><A href="http://stoves.bioenergylists.org/"
target=_blank>http://stoves.bioenergylists.org/</A><BR><BR><BR></BLOCKQUOTE></DIV><BR></DIV>
<P>
<HR>
<P></P>_______________________________________________<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></BLOCKQUOTE></BODY></HTML>