<font style="font-family: Arial, Helvetica, sans-serif; font-size: 10pt">Vianney Tumwesige and listers, Hello, <br><br>
Look at <a href="http://biogas.wikispaces.com/">biogas.wikispaces.com </a>, under biogas burners. I had written a paper on biogas burners and Paul Harris has summerised it and put it on the biogas wikispaces. Paul also set up a spreadsheet based on the equations that I had found, that might be useful as a design tool. <br><br>
This is a reminder to listers that this wikispaces is a useful set of resources as well as links to other resources that can be used to discover more about biogas. It should be the first place that people doing research on biogas should look. <br><br>
Best wishes, <br>
David F
<br><br>
********************************************************************<br>
Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5 4PU<br>
d.j.fulford@btinternet.com, Tel: +44(0)118 326 9779 Mob: +44(0)7746 806401<br>
Kingdom Bioenergy Ltd, www.kingdombio.com, davidf@kindombio.com<br>
Skype Identity: djfulford<br><br><br><font size=2 face='Tahoma, Arial, Sans-Serif'><hr size=2 width="100%" align=center><b>From</b>: "Vianney Tumwesige" <trustvianney@gmail.com><br><b>Sent</b>: 21 May 2012 02:00<br><b>To</b>: "For Discussion of Anaerobic Digestion" <digestion@lists.bioenergylists.org><br><b>Subject</b>: [Digestion] Biogas appliances</font><br><br>Dear All, <div><br></div><div>I am writing a paper on biogas appliances, below is an extract from the paper.</div><div><br></div><div><font color="#000066"><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif"">All gas burners follow the same principle; the
force which drives the gas and air into the burner is the pressure of gas in
the pipeline. A biogas stove can have single or double burner with varying gas
consumption rates ranging from 220 dm<sup>3</sup> hr<sup>-1</sup> to 450 dm<sup>3</sup>
hr<sup>-1</sup> at standard temperature and pressure</span><span style="font-size:10.0pt;line-height:115%;font-family:TimesNewRoman">.</span><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif""> This consumption rate results from the pressure
provided by the biogas plant and the diameter of the inlet pipe. The jet at the
inlet of the burner increases the gas speed, so producing a draft that sucks
primary air into the pipe. T<span style="background-color:rgb(255,255,0)">he primary air must be completely mixed with the
biogas, and this is achieved by widening the pipe to a minimum diameter, which
is in <a>constant
relation </a></span></span><span class="MsoCommentReference"><span style="font-size:8pt;line-height:115%;font-family:Calibri,sans-serif;background-color:rgb(255,255,0)"><a class="msocomanchor" id="_anchor_1" href="#_msocom_1" language="JavaScript" name="_msoanchor_1">[JUS1]</a> </span></span><span style="font-size:10.0pt;line-height:115%;font-family:"Calibri","sans-serif""><span style="background-color:rgb(255,255,0)">to
the diameter of the jet.</span> The widening of the pipe again reduces the speed of
the gas. This diffuse gas goes into the burner head. The burner head is formed
in such a way as to allow equal gas pressure everywhere before the gas/air
mixture leaves the burner through the orifices at a speed only slightly above 0.25
ms-1, the specific flame speed of biogas. More oxygen (secondary air) is
supplied by the surrounding air to enable final combustion.</span>
</font><div>
<hr class="msocomoff" align="left" size="1" width="33%">
<div>
<div id="_com_1" class="msocomtxt" language="JavaScript"><font color="#000066"><a name="_msocom_1"></a>
</font><p class="MsoCommentText"><font color="#000066"><span class="MsoCommentReference"><span style="font-size:8.0pt"> <a href="#_msoanchor_1" class="msocomoff">[JUS1]</a></span></span>Specify
what this constant relationship is plus reference</font></p>
</div>
</div>
</div><div>Please, is some one in position to provide more information on the highlighted section of the extract?</div><div><br></div><div>Thank you in advance, </div><div><br></div><div>Regards</div>-- <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>
</div><br></font>