[Digestion] Biogas appliances

[davidf@kingdombio.co.uk Fulford]

Vianney Tumwesige and listers, Hello, 



Look at biogas.wikispaces.com , 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. 



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. 



Best wishes, 

David F



   
********************************************************************

Dr David Fulford CEnv MEI, 15, Brandon Ave, Woodley, Reading RG5 4PU

d.j.fulford at btinternet.com, Tel: +44(0)118 326 9779 Mob: +44(0)7746 806401

Kingdom Bioenergy Ltd, www.kingdombio.com, davidf at kindombio.com

                                 Skype Identity: djfulford

----------------------------------------
From: "Vianney Tumwesige" <trustvianney at gmail.com>
Sent: 21 May 2012 02:00
To: "For Discussion of Anaerobic Digestion" 
<digestion at lists.bioenergylists.org>
Subject: [Digestion] Biogas appliances 

Dear All, 
I am writing a paper on biogas appliances, below is an extract from the 
paper.
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 dm3 hr-1 to 450 dm3
hr-1 at standard temperature and pressure. 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. The primary air must be completely mixed with 
the
biogas, and this is achieved by widening the pipe to a minimum diameter, 
which
is in constant
relation [JUS1] to
the diameter of the jet. 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.

 


----------------------------------------








  [JUS1]Specify
what this constant relationship is plus reference 





Please, is some one in position to provide more information on the 
highlighted section of the extract?
Thank you in advance, 
Regards-- 
Vianney Tumwesige


Director - Green Heat (U) Ltd  


P.O. Box 10235
Kampala-Uganda
256 (0) 71 237 9889

"The more people are self sufficient in cooking fuel, the more personal and 
financial freedom they have." - Emma Casson

 
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