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<DIV><FONT size=2 face=Arial>Dear AD</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=adkarve@gmail.com href="mailto:adkarve@gmail.com">Anand Karve</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, October 17, 2010 5:31
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] MUST CHARCOAL BE A
CAUSE FOR CONCERN?</DIV>
<DIV><BR></DIV>
<DIV>Dear Kevin,</DIV>
<DIV>our housewives normally use stoves in which wood is pushed into the
firebox through an opening at the base of the stove. In such a case,
they like to burn large diameter wood, because the large piece of wood needs
only to be given an occasional shove to push it deeper into the firebox. Also,
by pulling the log partially out of the firebox, they can reduce the intensity
of fire.</DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial># OK... this gives th woman the following
advantages:</FONT></DIV>
<DIV><FONT size=2 face=Arial>1: Minimal fuel preparation </FONT></DIV>
<DIV><FONT size=2 face=Arial>2: Ease of operation and minimal
attendance</FONT></DIV>
<DIV><FONT size=2 face=Arial>3: Control of cooking intensity</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial># The disadvantage of stickwood, relative to
"free waste" is the cost of stickwood.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV> In a TLUD stove one needs smaller pieces. Stalks of cotton or
pigeon pea are available free of cost to farmers who grow these crops. These
stalks are relatively thin and easy to break horizontally even with bare
hands. However the TLUD stove with natural draft is not popular as a stove for
cooking. Most people use it for heating bath water, because this stove,
once it has started, does not need any further tending. With a single
load, this stove can heat about 10 to 15 litres of water to a
temperature of about 50C, without paying any further attention to
it. </DIV>
<DIV> </DIV>
<DIV><FONT size=2 face=Arial># The advantages here of the ND TLUD
are:</FONT></DIV>
<DIV><FONT size=2 face=Arial>1: Free fuel, available for basically little more
than the time and effort cost for collecting.</FONT></DIV>
<DIV><FONT size=2 face=Arial>2: Lack of requirement for careful attention to
fire intensity.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial># The disadvantages of the ND TLUD
are:</FONT></DIV>
<DIV><FONT size=2 face=Arial>1: Time and effort required to prepare fuel.
(Apparently relatively easy and safe, because of brittleness of cotton or
pidgeon pea stocks.)</FONT></DIV>
<DIV><FONT size=2 face=Arial>2: Lack of control of heating intensity.
(Relatively unimportant when heating larger quantities of water.)</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial># The housewives seem to have found a "stove
technology blend" that works well for them. They pay real money for stickwood,
for the apparent advantage of easy control of cooking intensity, and lack of
fuel preparation effort, but will spend extra effort preparing a "free fuel"
for the TLUD, for water heating, to get the advantage of lack of need for
attention. The practical reality is that the housewife must stay in the
kitchen area when preparing food, so the portion of her time availability for
"fire control" is insignificant. When heating water, there is no danger of
"over cooking", and as such, there is no need for her to be there to manage
the fire. In this case, the ability to operate unattended is a big advantage
for her, in that she can spend her time doing other tasks. She may even have
sufficient spare time during the cooking process for her to prepare the "free
fuel" for water heating.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial># The fundamental driver here seems to be that
the housewives are very aware of, and very good at, "kitchen time management."
Would it be fair to conclude that the lack of control over the fire intensity,
and the extra time required for duel preparation are serious obstacles to a
more widespread utilization of ND TLUD's for cooking
applications?</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial># Please pardon my ignorance of "rural India
Cooking Practises", but would you have a general indication of fuel usage for
cooking:</FONT></DIV>
<DIV><FONT size=2 face=Arial>1: % Stickwod</FONT></DIV>
<DIV><FONT size=2 face=Arial>2: % Charcoal</FONT></DIV>
<DIV><FONT size=2 face=Arial>3: % Other</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Best wishes,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Kevin Chisholm</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV>Yours</DIV>
<DIV>A.D.Karve <BR><BR></DIV>
<DIV class=gmail_quote>On Sun, Oct 17, 2010 at 11:51 AM, Kevin <SPAN
dir=ltr><<A
href="mailto:kchisholm@ca.inter.net">kchisholm@ca.inter.net</A>></SPAN>
wrote:<BR>
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<DIV><FONT size=2 face=Arial>Dear AD</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>I find your observations about fuel preparation
very interesting. I think they are very important in understanding the
significance of one of the obstacles to fuel preparation for stove
systyems.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>In an extreme Poverty Economy, such as
exists for very poor people who are struggling to attain the basic
essentials of life, about the only asset and resource these people have is
time and their labour. </FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Stickwood can be burned directly in a Rocket
type stove. with no further preparation. Or, it can be burned in a box type
stove by cutting or breaking to length. However, there is considerable extra
preparation to reduce fuel size to the degree required for a
TLUD.</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial> Does this extra preparation effort act as
an obstacle to more widespread use of the TLUD Stove? Under what
circumstances would this extra preparation effort be justified?</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Best wishes,</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial>Kevin</FONT></DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
<DIV><FONT size=2 face=Arial></FONT> </DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV style="FONT: 10pt arial; BACKGROUND: #e4e4e4"><B>From:</B> <A
title=adkarve@gmail.com href="mailto:adkarve@gmail.com"
target=_blank>Anand Karve</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> Friday, October 15, 2010 11:59
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Stoves] MUST CHARCOAL
BE A CAUSE FOR CONCERN?</DIV>
<DIV><BR></DIV><BR><BR>
<DIV class=gmail_quote>
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<DIV bgcolor="#ffffff">
<DIV><FONT size=2 face=Arial>Dear Otto,</FONT></DIV></DIV></BLOCKQUOTE>
<DIV>from the point of view of chopping wood into small pieces, we found
bamboo to be an ideal type of wood. It is very easy to split bamboo
vertically into strips of 2 to 3 cm width, and once the bamboo has been
split, one can break the strips into pieces about 10 to 15 cm long, even
with bare hands. </DIV>
<DIV>Yours</DIV>
<DIV>A.D.Karve</DIV>
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