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<DIV><FONT face=Arial>Dear Paul</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>I guess that what I was trying to suggest in a simple way
is that you are not dealing with a simple problem. What you are dealing
with is </FONT></DIV>
<DIV><FONT face=Arial>"3 dimensional unsteady state heat transfer through
beds of irregularly sized broken solids, with irregular shape factors,
changing size, and changing state."</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Best wishes,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Kevin</FONT></DIV>
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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=paul.olivier@esrla.com href="mailto:paul.olivier@esrla.com">Paul
Olivier</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> Tuesday, August 13, 2013 7:40
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] corn cobs and
char?</DIV>
<DIV><BR></DIV>
<DIV dir=ltr>
<DIV>
<DIV>
<DIV>
<DIV>Kevin,<BR><BR></DIV>Note that I used the phrase "sufficiently uniform". I
have experimented with several forms of loose biomass in no way as uniform as
rice hulls, such as coffee husks. Some work quite
nicely.<BR><BR></DIV></DIV></DIV>
<DIV>But I would not venture a guess about the wooden spheres you
describe.<BR></DIV>
<DIV>I like to see a certain resistance to air or gas flow.<BR></DIV>
<DIV>We can't say much until we run tests.<BR></DIV>
<DIV><BR></DIV>
<DIV>Thanks.<BR></DIV>
<DIV>Paul<BR></DIV></DIV>
<DIV class=gmail_extra><BR><BR>
<DIV class=gmail_quote>On Wed, Aug 14, 2013 at 5:04 AM, Kevin <SPAN
dir=ltr><<A href="mailto:kchisholm@ca.inter.net"
target=_blank>kchisholm@ca.inter.net</A>></SPAN> wrote:<BR>
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style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote><U></U>
<DIV bgcolor="#ffffff">
<DIV><FONT face=Arial>Dear Paul</FONT></DIV>
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style="BORDER-LEFT: #000000 2px solid; PADDING-LEFT: 5px; PADDING-RIGHT: 0px; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px">
<DIV class=im>
<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial; BACKGROUND: #e4e4e4"><B>From:</B> <A
title=paul.olivier@esrla.com href="mailto:paul.olivier@esrla.com"
target=_blank>Paul Olivier</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=stoves@lists.bioenergylists.org
href="mailto:stoves@lists.bioenergylists.org" target=_blank>Discussion of
biomass cooking stoves</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Tuesday, August 13, 2013 6:38
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] corn cobs and
char?</DIV>
<DIV><BR></DIV></DIV>
<DIV dir=ltr>
<DIV>
<DIV class=im>
<DIV>Ron,<BR><BR></DIV>
<DIV>In a TLUD it's all about the uniformity of air flow. <BR>If corn cobs
were cut to the same length, they just might be sufficiently
uniform.</DIV>
<DIV> </DIV></DIV>
<DIV><FONT face=Arial># I think it is a bit more complex that "unifiorm
length." With a given species of fuel, I think it is more a relation of
relative size (that would determine pressure drop and uniformity of flow
across the fuel bed), and surface area and diameter of the fuel particle.
(That will have a large impact on fuel burning
characteristics.) </FONT></DIV><FONT face=Arial></FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>For example, consider a TLUD running on wood spheres
of say 1/4" daimeter, and 1" diameter. Such stoves would have quite
different operating characteristics.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial>Best wishes,</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Kevin</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><BR><BR></DIV>
<DIV>Thanks.<BR><BR></DIV>Paul Olivier<BR></DIV>
<DIV class=im>
<DIV class=gmail_extra><BR><BR>
<DIV class=gmail_quote>On Wed, Aug 14, 2013 at 1:54 AM, Ronal W. Larson
<SPAN dir=ltr><<A href="mailto:rongretlarson@comcast.net"
target=_blank>rongretlarson@comcast.net</A>></SPAN> wrote:<BR>
<BLOCKQUOTE
style="BORDER-LEFT: #ccc 1px solid; MARGIN: 0px 0px 0px 0.8ex; PADDING-LEFT: 1ex"
class=gmail_quote>List:<BR><BR> Anyone have any data on
using corn cobs in char-making stoves? The supply would seem to be
large and likely low
cost..<BR><BR>Ron<BR>_______________________________________________<BR>Stoves
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clear=all><BR>-- <BR>Paul A. Olivier PhD<BR>26/5 Phu Dong Thien
Vuong<BR>Dalat<BR>Vietnam<BR><BR>Louisiana telephone: 1-337-447-4124
(rings Vietnam)<BR>Mobile: 090-694-1573 (in Vietnam)<BR>Skype address:
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<P></P></BLOCKQUOTE></DIV><BR>_______________________________________________<BR>Stoves
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clear=all><BR>-- <BR>Paul A. Olivier PhD<BR>26/5 Phu Dong Thien
Vuong<BR>Dalat<BR>Vietnam<BR><BR>Louisiana telephone: 1-337-447-4124 (rings
Vietnam)<BR>Mobile: 090-694-1573 (in Vietnam)<BR>Skype address:
Xpolivier<BR><A href="http://www.esrla.com/"
target=_blank>http://www.esrla.com/</A> </DIV>
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