<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML xmlns="http://www.w3.org/TR/REC-html40" xmlns:v =
"urn:schemas-microsoft-com:vml" xmlns:o =
"urn:schemas-microsoft-com:office:office" xmlns:w =
"urn:schemas-microsoft-com:office:word" xmlns:m =
"http://schemas.microsoft.com/office/2004/12/omml"><HEAD>
<META content="text/html; charset=iso-8859-1" http-equiv=Content-Type>
<META name=GENERATOR content="MSHTML 8.00.6001.23520">
<STYLE>@font-face {
font-family: Helvetica;
}
@font-face {
font-family: Cambria Math;
}
@font-face {
font-family: Calibri;
}
@page WordSection1 {size: 612.0pt 792.0pt; margin: 72.0pt 72.0pt 72.0pt 72.0pt; }
P.MsoNormal {
MARGIN: 0mm 0mm 0pt; FONT-FAMILY: "Times New Roman","serif"; FONT-SIZE: 12pt
}
LI.MsoNormal {
MARGIN: 0mm 0mm 0pt; FONT-FAMILY: "Times New Roman","serif"; FONT-SIZE: 12pt
}
DIV.MsoNormal {
MARGIN: 0mm 0mm 0pt; FONT-FAMILY: "Times New Roman","serif"; FONT-SIZE: 12pt
}
A:link {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlink {
COLOR: blue; TEXT-DECORATION: underline; mso-style-priority: 99
}
A:visited {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.MsoHyperlinkFollowed {
COLOR: purple; TEXT-DECORATION: underline; mso-style-priority: 99
}
SPAN.apple-style-span {
mso-style-name: apple-style-span
}
SPAN.apple-tab-span {
mso-style-name: apple-tab-span
}
SPAN.EmailStyle19 {
FONT-FAMILY: "Calibri","sans-serif"; COLOR: #1f497d; mso-style-type: personal-reply
}
.MsoChpDefault {
FONT-SIZE: 10pt; mso-style-type: export-only
}
DIV.WordSection1 {
page: WordSection1
}
</STYLE>
<!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]--></HEAD>
<BODY lang=EN-CA link=blue bgColor=#ffffff vLink=purple>
<DIV><FONT size=4>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">Possible
solution for stove bumping and dislodging the pot.<o:p></o:p></SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">The
pot holder is attached to the stove or burner.<o:p></o:p></SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">The
pot holder extends out past the pot.<o:p></o:p></SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">A
pot shell or pot skirt sits on the stove top just beyond the pot holders so the
pot holders stops the pot skirt from moving.<o:p></o:p></SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">The
pot skirt stops the pot from moving too far.</SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">Crispin
are you using a pot skirt?</SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">A
pot skirt or a pot shell is the least expensive way to improve a stoves
efficiency in my opinion, but the stove top needs to be larger than the pot so
the skirt has a place to rest.</SPAN></B></P>
<P style="MARGIN: 0in 0in 10pt" class=MsoNormal><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt">I
did this with my School Lunch Cooker but I was not thinking about safety at the
time, it just worked out that way.<o:p></o:p></SPAN></B></P><B><SPAN
style="LINE-HEIGHT: 115%; FONT-FAMILY: 'Verdana','sans-serif'; FONT-SIZE: 10.5pt; mso-fareast-language: EN-US; mso-fareast-font-family: Calibri; mso-fareast-theme-font: minor-latin; mso-bidi-font-family: 'Times New Roman'; mso-bidi-theme-font: minor-bidi; mso-ansi-language: EN-US; mso-bidi-language: AR-SA">Lanny</SPAN></B></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> Monday, September 23, 2013 9:34
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] Stoves Digest, Vol
37, Issue 24</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
Nate<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
am experimenting with a different form of stability as the chances of a pot
tipping over are not as great as that of a pot falling off. If the support
triangle or square of a stove is relatively then putting on a large diameter
pot is dangerous because it easily falls over spilling hot water on everything
and everyone.<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">We
are looking at a rice steaming soblok as the most dangerous local cooking
container. It has a hollow space at the bottom where water is boiled
continuously, a platform for holding the rice which is more dense than water,
and a tall pot with little space above. When tilted the centre of gravity
moves more than it would if there was no steamer
section.<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
that same pot is used for boiling water it is relative tall for its diameter.
When tilted the water shifts to the outside moving the CG more than the tilt
of a solid object.<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
was thinking of a spec whereby the pot supports should be adequate to cause
the water to spill out of an 80% full pot before falling over. It is a test
that can be done mathematically as well as practically.<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">Interested?<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">Regards<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">Crispin
in Jakarta<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>
<DIV
style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; PADDING-BOTTOM: 0mm; PADDING-LEFT: 0mm; PADDING-RIGHT: 0mm; BORDER-TOP: #e1e1e1 1pt solid; BORDER-RIGHT: medium none; PADDING-TOP: 3pt">
<P class=MsoNormal><B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt"
lang=EN-US>From:</SPAN></B><SPAN
style="FONT-FAMILY: 'Calibri','sans-serif'; FONT-SIZE: 11pt" lang=EN-US>
Stoves [mailto:stoves-bounces@lists.bioenergylists.org] <B>On Behalf Of
</B>Nathan Johnson<BR><B>Sent:</B> Monday, September 23, 2013 11:28
PM<BR><B>To:</B> <stoves@lists.bioenergylists.org><BR><B>Subject:</B>
Re: [Stoves] Stoves Digest, Vol 37, Issue 24<o:p></o:p></SPAN></P></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P>
<P class=MsoNormal>Hi Lanny, <o:p></o:p></P>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>There are two methods and metrics commonly used to measure
the susceptibility of a stove from tipping over<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>1) method -- with a stove standing vertically, tilt the
stove to one side until it falls over; metric -- the angle that the stove can
be tilted away from vertical before it tips over on its own (typically used
for portable stoves)<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>2) method -- apply a specified horizontal force to the
stove; metric -- if the stove tilts, moves, deforms, or falls over when the
force is applied (typically used for larger stationary
stoves)<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Protocols should not specify the required size of the base
to prevent tipping. That decision is left to the designer based on his/her
findings from the safety tests. <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Most protocols do not require pots present on the stove.
Yet, as you note, a pot can affect the stove's risk of tipping. No doubt all
aspects of the cooking system--stove, user, pots/utensils, kitchen--affect
cooking safety. Many people in the stove community tend to consider the larger
contexts that influence the efficacy of technical designs. I have a similar
viewpoint, and chose to include the stove when developing a new set of safety
guidelines tailored to biomass cookstoves. You can find my work on stove
safety here <A
href="http://community.cleancookstoves.org/user_content/files/003/052/3052100/a8d66ebfa9745553fb1d971160a282d4-bssp1.0.pdf">http://community.cleancookstoves.org/user_content/files/003/052/3052100/a8d66ebfa9745553fb1d971160a282d4-bssp1.0.pdf</A>
The text is copied from my Master's Thesis. Let me know if you want a copy of
the full text. <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV>
<DIV>
<P class=MsoNormal>Best regards, <o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal>Nate<o:p></o:p></P></DIV>
<DIV>
<P class=MsoNormal><o:p> </o:p></P>
<DIV>
<DIV>
<DIV>
<DIV>
<P class=MsoNormal><SPAN
style="FONT-FAMILY: 'Helvetica','sans-serif'; COLOR: black; FONT-SIZE: 13.5pt">--<BR>Nathan
Johnson<BR>Assistant Professor<BR>Department of Engineering &
Computing Systems<BR>Arizona State
University<BR><BR></SPAN><o:p></o:p></P></DIV></DIV></DIV></DIV>
<P class=MsoNormal><o:p> </o:p></P></DIV></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>