<html>
<head>
<meta content="text/html; charset=UTF-8" http-equiv="Content-Type">
</head>
<body bgcolor="#FFFFFF" text="#000000">
Dear Crispin,<br>
<br>
On 09.01.2012 19:02, Crispin Pemberton-Pigott wrote:
<blockquote cite="mid:052f01cccef8$cd6fcfd0$684f6f70$@gmail.com"
type="cite">
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta name="Generator" content="Microsoft Word 14 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Wingdings;
panose-1:5 0 0 0 0 0 0 0 0 0;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
@font-face
{font-family:Consolas;
panose-1:2 11 6 9 2 2 4 3 2 4;}
@font-face
{font-family:Tahoma;
panose-1:2 11 6 4 3 5 4 4 2 4;}
@font-face
{font-family:Verdana;
panose-1:2 11 6 4 3 5 4 4 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0mm;
margin-bottom:.0001pt;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:blue;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:purple;
text-decoration:underline;}
p.MsoPlainText, li.MsoPlainText, div.MsoPlainText
{mso-style-priority:99;
mso-style-link:"Plain Text Char";
margin:0mm;
margin-bottom:.0001pt;
font-size:10.5pt;
font-family:Consolas;}
p
{mso-style-priority:99;
mso-margin-top-alt:auto;
margin-right:0mm;
mso-margin-bottom-alt:auto;
margin-left:0mm;
font-size:12.0pt;
font-family:"Times New Roman","serif";}
code
{mso-style-priority:99;
font-family:"Courier New";}
p.MsoNoSpacing, li.MsoNoSpacing, div.MsoNoSpacing
{mso-style-priority:1;
margin-top:5.0pt;
margin-right:0mm;
margin-bottom:5.0pt;
margin-left:0mm;
mso-add-space:auto;
font-size:11.0pt;
font-family:"Arial","sans-serif";
color:#1F497D;}
p.MsoNoSpacingCxSpFirst, li.MsoNoSpacingCxSpFirst, div.MsoNoSpacingCxSpFirst
{mso-style-priority:1;
mso-style-type:export-only;
margin-top:5.0pt;
margin-right:0mm;
margin-bottom:0mm;
margin-left:0mm;
margin-bottom:.0001pt;
mso-add-space:auto;
font-size:11.0pt;
font-family:"Arial","sans-serif";
color:#1F497D;}
p.MsoNoSpacingCxSpMiddle, li.MsoNoSpacingCxSpMiddle, div.MsoNoSpacingCxSpMiddle
{mso-style-priority:1;
mso-style-type:export-only;
margin:0mm;
margin-bottom:.0001pt;
mso-add-space:auto;
font-size:11.0pt;
font-family:"Arial","sans-serif";
color:#1F497D;}
p.MsoNoSpacingCxSpLast, li.MsoNoSpacingCxSpLast, div.MsoNoSpacingCxSpLast
{mso-style-priority:1;
mso-style-type:export-only;
margin-top:0mm;
margin-right:0mm;
margin-bottom:5.0pt;
margin-left:0mm;
mso-add-space:auto;
font-size:11.0pt;
font-family:"Arial","sans-serif";
color:#1F497D;}
span.PlainTextChar
{mso-style-name:"Plain Text Char";
mso-style-priority:99;
mso-style-link:"Plain Text";
font-family:Consolas;}
span.EmailStyle21
{mso-style-type:personal-reply;
font-family:"Calibri","sans-serif";
color:#1F497D;}
.MsoChpDefault
{mso-style-type:export-only;
font-size:10.0pt;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
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]-->
<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Dear
Ron<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Good
to hear from you in the new year.<o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#1F497D"
lang="EN-US">></span></b><span
style="font-size:10.0pt;font-family:"Verdana","sans-serif"">I
think you misunderstood the article. The bag is only for
transport and temporary storage. They take the empty (and
some dung) to a biogas producer, get it filled and go home
to cook with it. It is supposed to be about a day's cookin'
worth.</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
am with David House </span><code><span
style="font-size:10.0pt"><a moz-do-not-send="true"
href="www.completebiogas.com">www.completebiogas.com</a>
</span></code><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">on
this one: it is a portable digester with nothing but gas in
it! </span><span
style="font-size:11.0pt;font-family:Wingdings;color:#1F497D">J</span><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">
<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">He
writes, “</span>It's actually a gas bag, not a digester.
Even so, it's an excellent innovation, and a worthy addition
to the armamentarium, wherever it can serve as a means of
transport in connection with a large digester near any large
population. <br>
<br>
And as well, from my point of view, it's also a bit ironic,
since the very sturdy bag, selling for ~$US38, could actually
<i>be</i> a digester if it had two additional pipes (an inlet
and an outlet), and further that since it's about a cubic
meter in volume, it would produce about a cubic meter of gas
every day, if fed and kept warm.<span style="font-size: 11pt;
font-family: "Calibri","sans-serif";
color: rgb(31, 73, 125);">”</span></p>
</div>
</blockquote>
That may well be, but, not having seen the bag, it may well need
some additional features apart from two pipes. You'd have to get
solid materials in and out, etc. Also, I think that his proviso:
"...wherever it can serve as a means of transport ... large digester
... any large population." is overwrought. When compared with
walking 10 km with 20 or more kg on your head, a 3kg bag is gonna
add up to 30 € pretty quick. I'm not dissing the idea of making a
digester of that size, just have the impression from the relative
clause that he is degrading the usefulness of the idea
unnecessarily.<br>
<br>
<br>
<br>
<blockquote cite="mid:052f01cccef8$cd6fcfd0$684f6f70$@gmail.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">I think David is working on a bag digester
himself. The transport of gas is interesting. If it turned
out to be attractive as a cooking fuel (and delivery system)
the users would perhaps be convinced to install their own
systems. I am not convinced that a minibus would accept the
gas ‘package’ without fear or charge.</span></p>
</div>
</blockquote>
I think they limited the size to keep it a relatively manageable
size.<br>
<blockquote cite="mid:052f01cccef8$cd6fcfd0$684f6f70$@gmail.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom: 12pt;"><span
style="font-size: 11pt; font-family:
"Calibri","sans-serif"; color: rgb(31,
73, 125);">It is a lot lighter than a load of wood and the
walking distance might be less. I wonder if a tire on a rim
might be as good, and could be pumped by hand. Will a tire
hold a useful volume of gas if hand pumped?</span></p>
</div>
</blockquote>
Even if the walking distance was more, one would not have the same
fatigue. i think you'd have to work pretty hard to compress a whole
m^3 into anything like a regular tire-- and a tractor tire with rim
would be more taxing to manage than a load of firewood on one's
head. ;-) If this was done in cooperation with schools, they could
even get the transport with larger school children on the way home
from school, delivery before school, pick up the bag and go home
after school. hoping you're doing well.<br>
<br>
regards,<br>
ron<br>
w<br>
h<br>
<br>
<br>
<blockquote cite="mid:052f01cccef8$cd6fcfd0$684f6f70$@gmail.com"
type="cite">
<div class="WordSection1">
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Regards<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Crispin<o:p></o:p></span></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
Stoves mailing list
to Send a Message to the list, use the email address
<a class="moz-txt-link-abbreviated" href="mailto:stoves@lists.bioenergylists.org">stoves@lists.bioenergylists.org</a>
to UNSUBSCRIBE or Change your List Settings use the web page
<a class="moz-txt-link-freetext" href="http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org">http://lists.bioenergylists.org/mailman/listinfo/stoves_lists.bioenergylists.org</a>
for more Biomass Cooking Stoves, News and Information see our web site:
<a class="moz-txt-link-freetext" href="http://www.bioenergylists.org/">http://www.bioenergylists.org/</a>
</pre>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<p class="avgcert" color="#000000" align="left">No virus found in
this message.<br>
Checked by AVG - <a moz-do-not-send="true"
href="http://www.avg.com">www.avg.com</a><br>
Version: 10.0.1416 / Virus Database: 2109/4132 - Release Date:
01/09/12</p>
</blockquote>
</body>
</html>