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<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>G’day All,<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'>As promised below there is now an example and a link to a
spreadsheet on the biogas wiki at <a
href="http://biogas.wikispaces.com/Pressure-Volume+calculations">http://biogas.wikispaces.com/Pressure-Volume+calculations</a>
if you would like to check my calculations!<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'>Happy digesting,<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>HOOROO<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:10.5pt;font-family:Consolas;
color:#1F497D'>Mr. Paul Harris, Room S116b, Waite Main Building Faculty of
Sciences, The University of Adelaide, Waite Campus, PMB 1, Glen Osmond SA
5064 Ph : +61 8 8303 7880
Fax : +61 8 8303 4386 <a
href="mailto:paul.harris@adelaide.edu.au"><span style='color:blue'>mailto:paul.harris@adelaide.edu.au</span></a>
<a href="http://www.adelaide.edu.au/directory/paul.harris"><span
style='color:blue'>http://www.adelaide.edu.au/directory/paul.harris</span></a><o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'><o:p> </o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>CRICOS Provider Number 00123M<o:p></o:p></span></p>
<p class=MsoNormal><span style='font-size:10.5pt;font-family:Consolas;
color:#1F497D'>This email message is intended only for the addressee(s) and
contains information that may be confidential and/or copyright. If you
are not the intended recipient please notify the sender by reply email and
immediately delete this email. Use, disclosure or reproduction of this email by
anyone other than the intended recipient(s) is strictly prohibited. No
representation is made that this email or any attachments are free of viruses.
Virus scanning is recommended and is the responsibility of the recipient.<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>
<div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'>
<p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:
"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;
font-family:"Tahoma","sans-serif"'> Vianney Tumwesige
[mailto:trustvianney@gmail.com] <br>
<b>Sent:</b> Tuesday, 23 November 2010 3:17 PM<br>
<b>To:</b> paul.harris@adelaide.edu.au; For Discussion of Anaerobic Digestion<br>
<b>Subject:</b> Re: [Digestion] Accurate Biogas Yeild<o:p></o:p></span></p>
</div>
<p class=MsoNormal><o:p> </o:p></p>
<p class=MsoNormal>Thank you Paul for the insight. Let me know whenever you
post an example (and the spreadsheet calculator) on the lovely Biogas wiki.<br>
<br>
Have a great day, Love your Albert Einstein quotations<o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
<div>
<p class=MsoNormal>On Tue, Nov 23, 2010 at 6:49 AM, Paul Harris <<a
href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>>
wrote:<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>G’day Vianney et al,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>I think it was mentioned in this list
not that long ago that a “floating drum” storage offers a good, simple way of
measuring gas production. You just record the change in height of the drum and
volume of gas = area * height (area of a circle = pi Dsquared/4 or pi Rsquared
and there are 1000 litres in a cubic metre). If you want more accuracy use a small
diameter drum with greater height to get the necessary capacity. Pressure and
volume of any gas are related by p1v1=p2v2, where p is pressure, v is volume
and 1 represents the initial conditions and 2 is the final conditions. Mass and
volume are related by density, where Density = Mass/Volume and the density of
biogas is about 1.18 kg/m3. The easiest way to develop the pressure needed for
burners etc is to add weight to the drum (bigger diameter – more weight, since
Pressure = kg*9.8/sq.metres) and if you measure “pressure” in mm of water you
need to know Pressure (Pa) = 9.8 *Height (mm). I think that should let
you calculate anything you need and I hope you understand the “useful” metric
units I have used. I will put an example (and possibly a spreadsheet
calculator!) on the biogas wiki.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>Happy Digesting,</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'>HOOROO</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.5pt;font-family:Consolas;color:#1F497D'>Mr. Paul Harris,
Room S116b, Waite Main Building Faculty of Sciences, The University of
Adelaide, Waite Campus, PMB 1, Glen Osmond SA 5064 Ph : +61 8
8303 7880 Fax : +61 8 8303 4386
<a href="mailto:paul.harris@adelaide.edu.au" target="_blank">mailto:paul.harris@adelaide.edu.au</a>
<a href="http://www.adelaide.edu.au/directory/paul.harris" target="_blank">http://www.adelaide.edu.au/directory/paul.harris</a></span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.5pt;font-family:Consolas;color:#1F497D'> </span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.5pt;font-family:Consolas;color:#1F497D'>CRICOS Provider
Number 00123M</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:10.5pt;font-family:Consolas;color:#1F497D'>This email message
is intended only for the addressee(s) and contains information that may be
confidential and/or copyright. If you are not the intended recipient
please notify the sender by reply email and immediately delete this email. Use,
disclosure or reproduction of this email by anyone other than the intended
recipient(s) is strictly prohibited. No representation is made that this email
or any attachments are free of viruses. Virus scanning is recommended and is
the responsibility of the recipient.</span><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><span
style='font-size:11.0pt;color:#1F497D'> </span><o:p></o:p></p>
<div style='border:none;border-top:solid windowtext 1.0pt;padding:3.0pt 0cm 0cm 0cm;
border-color:-moz-use-text-color -moz-use-text-color'>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><b><span
lang=EN-US style='font-size:10.0pt'>From:</span></b><span lang=EN-US
style='font-size:10.0pt'> <a
href="mailto:digestion-bounces@lists.bioenergylists.org" target="_blank">digestion-bounces@lists.bioenergylists.org</a>
[mailto:<a href="mailto:digestion-bounces@lists.bioenergylists.org"
target="_blank">digestion-bounces@lists.bioenergylists.org</a>] <b>On Behalf Of
</b>Vianney Tumwesige<br>
<b>Sent:</b> Monday, 22 November 2010 5:41 PM<o:p></o:p></span></p>
<div>
<p class=MsoNormal><span lang=EN-US style='font-size:10.0pt'><br>
<b>To:</b> For Discussion of Anaerobic Digestion<br>
<b>Subject:</b> [Digestion] Accurate Biogas Yeild<o:p></o:p></span></p>
</div>
</div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Hello
AD friends,<o:p></o:p></p>
<div>
<div>
<p class=MsoNormal><br>
<br>
Hope everyone is fine. Back to business, how would you measure the biogas yield
of a system? LPG is measure in Kg and the user can tell how much gas he
consumes. Biogas being stored in a volume (liters or cubic meters) makes it
hard to relate to pressure (of the biogas). Have you been able to find a
system pressure system good for Africa?<br>
<br>
Thanks<br clear=all>
<br>
-- <br>
Vianney Tumwesige<o:p></o:p></p>
</div>
</div>
<div>
<div>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'>Director
- Green Heat (U) Ltd <b><span lang=EN-US>Error! Filename not specified.</span></b><br>
P.O. Box 10235<br>
Kampala-Uganda<br>
256 (0) 71 237 9889<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>
"The more people are self sufficient in cooking fuel, the more personal
and financial freedom they have." - Emma Casson<o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'><br>
<a href="http://trustvianney.wordpress.com/" target="_blank"><br>
</a><o:p></o:p></p>
<p class=MsoNormal style='mso-margin-top-alt:auto;mso-margin-bottom-alt:auto'> <o:p></o:p></p>
</div>
</div>
</div>
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<p class=MsoNormal style='margin-bottom:12.0pt'><br>
_______________________________________________<br>
Digestion mailing list<br>
<br>
to Send a Message to the list, use the email address<br>
<a href="mailto:Digestion@bioenergylists.org">Digestion@bioenergylists.org</a><br>
<br>
to UNSUBSCRIBE or Change your List Settings use the web page<br>
<a
href="http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org"
target="_blank">http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org</a><br>
<br>
for more information about digestion, see<br>
Beginner's Guide to Biogas<br>
<a href="http://www.adelaide.edu.au/biogas/" target="_blank">http://www.adelaide.edu.au/biogas/</a><br>
and the Biogas Wiki <a href="http://biogas.wikispaces.com/" target="_blank">http://biogas.wikispaces.com/</a><br>
<br>
<o:p></o:p></p>
</div>
<p class=MsoNormal><br>
<br clear=all>
<br>
-- <br>
Vianney Tumwesige<o:p></o:p></p>
<p class=MsoNormal>Director - Green Heat (U) Ltd <img border=0 width=20
height=20 id="_x0000_i1025"
src="http://c/photos/public/AIbEiAIAAABECOv50_eundi67QEiC3ZjYXJkX3Bob3RvKigwYzZmY2VhNzIxN2U0MzAxZDgzMjIzMjQwMTIyYjc4NmIxZDIyZTVkMAEoE3_PbMYF3svhn4g5QGXXnlOrRw"
alt=Picture><br>
P.O. Box 10235<br>
Kampala-Uganda<br>
256 (0) 71 237 9889<o:p></o:p></p>
<p class=MsoNormal><br>
"The more people are self sufficient in cooking fuel, the more personal
and financial freedom they have." - Emma Casson<o:p></o:p></p>
<p class=MsoNormal><br>
<a href="http://trustvianney.wordpress.com/" target="_blank"><br>
</a><o:p></o:p></p>
<p class=MsoNormal><o:p> </o:p></p>
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