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<br><div style="visibility: hidden; display: inline;" id="avg_ls_inline_popup">
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<div class="gmail_quote">On Tue, Nov 23, 2010 at 6:49 AM, Paul Harris <span dir="ltr"><<a href="mailto:paul.harris@adelaide.edu.au">paul.harris@adelaide.edu.au</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div link="blue" vlink="purple" lang="EN-AU">
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<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">G’day Vianney et al,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">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></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">Happy Digesting,</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);">HOOROO</span></p>
<p class="MsoNormal"><span style="font-size: 11pt; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Consolas; color: rgb(31, 73, 125);">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"><span style="color: blue;">mailto:paul.harris@adelaide.edu.au</span></a>
<a href="http://www.adelaide.edu.au/directory/paul.harris" target="_blank"><span style="color: blue;">http://www.adelaide.edu.au/directory/paul.harris</span></a></span></p>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Consolas; color: rgb(31, 73, 125);"> </span></p>
<p class="MsoNormal"><span style="font-size: 10.5pt; font-family: Consolas; color: rgb(31, 73, 125);">CRICOS Provider Number 00123M</span></p>
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<p class="MsoNormal"><b><span style="font-size: 10pt;" lang="EN-US">From:</span></b><span style="font-size: 10pt;" lang="EN-US"> <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<div class="im"><br>
<b>To:</b> For Discussion of Anaerobic Digestion<br>
<b>Subject:</b> [Digestion] Accurate Biogas Yeild</div></span></p>
</div>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Hello AD friends,</p><div><div></div><div class="h5"><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</div></div><div><div></div><div class="h5">
<p class="MsoNormal">Director - Green Heat (U) Ltd <img src="" alt="Picture" border="0" height="20" width="20"><br>
P.O. Box 10235<br>
Kampala-Uganda<br>
256 (0) 71 237 9889</p>
<p class="MsoNormal"><br>
"The more people are self sufficient in cooking fuel, the more personal
and financial freedom they have." - Emma Casson</p>
<p class="MsoNormal"><br>
<a href="http://trustvianney.wordpress.com/" target="_blank"><br>
</a></p>
<p class="MsoNormal"> </p>
</div></div></div>
</div>
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for more information about digestion, see<br>
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<br>
<br></blockquote></div><br><br clear="all"><br>-- <br>Vianney Tumwesige<br><div style="display: inline;"></div><div style="display: inline;"></div>Director - Green Heat (U) Ltd <img src="http://c/photos/public/AIbEiAIAAABECOv50_eundi67QEiC3ZjYXJkX3Bob3RvKigwYzZmY2VhNzIxN2U0MzAxZDgzMjIzMjQwMTIyYjc4NmIxZDIyZTVkMAEoE3_PbMYF3svhn4g5QGXXnlOrRw" alt="Picture" height="20" width="20"><br>
P.O. Box 10235<br>Kampala-Uganda<br>256 (0) 71 237 9889<br><div style="display: inline;">
</div><br>"The more people are self sufficient in cooking fuel, the more personal and financial freedom they have." - Emma Casson<br><div style="display: inline;"></div><br><a href="http://trustvianney.wordpress.com/" target="_blank"><br>
</a><div style="display: inline;"></div><div style="display: inline;"></div><br>