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<DIV><FONT size=5>Crispin the topic of control, and the difficulty of turning
down a wood fire, deserves its own subject line.</FONT></DIV>
<DIV><SPAN lang=EN><FONT size=5><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">>I
would like to remind everyone that it is pretty important to a cook to be able
to control the fire in some manner.</SPAN></FONT></SPAN></DIV>
<DIV><SPAN lang=EN><FONT size=5><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"></SPAN></FONT></SPAN> </DIV>
<DIV><SPAN lang=EN><FONT size=5>3 Points</FONT></DIV>
<DIV>
<P><FONT size=5>1- A wet piece of charcoal can reduce the heat of a
fire without smoking it. </FONT><FONT size=5>The moisture is released without
wetting the wood.</FONT></P>
<P><FONT size=5>2- Turning up is easier than turning down so when cooking with
my 22” griddle pan, I start with a small base line fire and add wood to
push the heat up temporarily. The base line fire needs to be tall
enough that the wood you add is totally submerged in the flames.
</FONT><FONT size=5>If I over shoot the heat and the pan starts to smoke the
oil, I open a cool air bypass opposite the chimney so cool air is drawn across
the bottom of the pan for instant control. </FONT></P>
<P><FONT size=5>3- I am wandering if the combustor type
stoves are more controllable than the gasifiers?</FONT></P>
<P><FONT size=5>What do you think.</FONT></P>
<P><FONT size=5>I will show my commercial duty stove as soon as I finish the
next prototype in a couple of weeks.</FONT></P>
<P><FONT size=5>Lanny</FONT></P></SPAN></DIV>
<DIV><FONT size=4></FONT> </DIV>
<DIV><FONT size=4></FONT> </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=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">'Discussion of biomass cooking
stoves'</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Thursday, May 02, 2013 10:12
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] Stove Definition -
controllability</DIV>
<DIV><BR></DIV>
<DIV class=WordSection1>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Dear
Friends<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">I
would like to remind everyone that it is pretty important to a cook to be able
to control the fire in some manner. There are lots of precedents so I won’t
repeat them. I would like to have a minimum control exerted over the cooking
power in order to qualify as a ‘cooking stove’. There are many appliances
which are used for heating water, showers (like the Geyser 2000 etc) or drying
fish and so one and on. But in order to ‘cook’ the fire has to be
controllable.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">For
an electric or gas stove this is fairly easy. In order to start things off,
what does everyone think about a turn down ration of 4:1 where the turn down
is ‘willful’ meaning it is controlled by the cook be either removing fuel,
controlling airflow or by some other means. The reason is that stoves are
appearing which definitely burn fuel and provide heat but are not very
controllable (or not at all controllable). While one car argue that by
brilliantly fuelling the stove in just the right manner a fire and its burn
can be exactly matched to a cooking need – agreed this is possible – but is it
‘cooking’?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">When
sitting in the field with cooks it becomes obvious that most cooking involves
controlling the power at some point. How much control should be applicable to
a stove in order to qualify as a ‘cooking stove’?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">If
I ask for a water heating stove, it would not have to have any controllability
at all – it just needs to heat the water within a certain time after which it
can go out – no one will mind. But if we want to present a ‘solution’ (a
cooking alternative to an open fire or sheltered fire) it will have to be
manageable ‘to a certain extent’.<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Thus
if someone says, “Here is my new cooking stove,” I can say, “Prove it can
cook.”<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">If
I ask for a maximum power of X and ask for a demonstration that it can be
controlled to X/4 is that reasonable as a minimum standard of
proof?<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US">Thanks<BR>Crispin<o:p></o:p></SPAN></P>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; COLOR: #1f497d; FONT-SIZE: 11pt; mso-fareast-language: EN-US"><o:p> </o:p></SPAN></P></DIV>
<P>
<HR>
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