[Digestion] Pressure measurement tool

Wed Nov 24 23:02:41 CST 2010

Hello Biogas fans,

How can I make a mobile biogas pressure measure instrument? Thanks

On Thu, Nov 25, 2010 at 7:46 AM, Vianney Tumwesige
<trustvianney at gmail.com>wrote:

> Thank you Paul, I will definitely check the Wiki
>
>
> On Thu, Nov 25, 2010 at 5:20 AM, Bryan Sanchez Marcum <bsmarcum at gmail.com>wrote:
>
>> How can I determine the composition of the biogas generated from my
>> digester.
>>
>> On Wed, Nov 24, 2010 at 9:42 PM, Paul Harris <paul.harris at adelaide.edu.au
>> > wrote:
>>
>>>  G’day All,
>>>
>>>
>>>
>>> As promised below there is now an example and a link to a spreadsheet on
>>> the biogas wiki at
>>> http://biogas.wikispaces.com/Pressure-Volume+calculations if you would
>>> like to check my calculations!
>>>
>>>
>>>
>>> Happy digesting,
>>>
>>> HOOROO
>>>
>>>
>>>
>>> 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
>>> mailto:paul.harris at adelaide.edu.au <paul.harris at adelaide.edu.au>
>>> http://www.adelaide.edu.au/directory/paul.harris
>>>
>>>
>>>
>>> CRICOS Provider Number 00123M
>>>
>>> This email message is intended only for the addressee(s) and contains
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>>> intended recipient please notify the sender by reply email and immediately
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>>>
>>>
>>> *From:* Vianney Tumwesige [mailto:trustvianney at gmail.com]
>>> *Sent:* Tuesday, 23 November 2010 3:17 PM
>>> *To:* paul.harris at adelaide.edu.au; For Discussion of Anaerobic Digestion
>>> *Subject:* Re: [Digestion] Accurate Biogas Yeild
>>>
>>>
>>>
>>> Thank you Paul for the insight. Let me know whenever you post an example
>>> (and the spreadsheet calculator) on the lovely Biogas wiki.
>>>
>>> Have a great day, Love your Albert Einstein quotations
>>>
>>>
>>>
>>> On Tue, Nov 23, 2010 at 6:49 AM, Paul Harris <
>>> paul.harris at adelaide.edu.au> wrote:
>>>
>>> G’day Vianney et al,
>>>
>>>
>>>
>>> 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.
>>>
>>>
>>>
>>> Happy Digesting,
>>>
>>> HOOROO
>>>
>>>
>>>
>>> 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
>>> mailto:paul.harris at adelaide.edu.au <paul.harris at adelaide.edu.au>
>>> http://www.adelaide.edu.au/directory/paul.harris
>>>
>>>
>>>
>>> CRICOS Provider Number 00123M
>>>
>>> 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.
>>>
>>>
>>>
>>> *From:* digestion-bounces at lists.bioenergylists.org [mailto:
>>> digestion-bounces at lists.bioenergylists.org] *On Behalf Of *Vianney
>>> Tumwesige
>>> *Sent:* Monday, 22 November 2010 5:41 PM
>>>
>>>
>>> *To:* For Discussion of Anaerobic Digestion
>>> *Subject:* [Digestion] Accurate Biogas Yeild
>>>
>>>
>>>
>>> Hello AD friends,
>>>
>>>
>>>
>>> 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?
>>>
>>> Thanks
>>>
>>> --
>>> Vianney Tumwesige
>>>
>>> Director - Green Heat (U) Ltd  *Error! Filename not specified.*
>>>
>>> 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
>>>
>>>
>>>
>>>  <http://trustvianney.wordpress.com/>
>>>
>>>
>>>
>>>
>>> _______________________________________________
>>> Digestion mailing list
>>>
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>>>
>>> for more information about digestion, see
>>> Beginner's Guide to Biogas
>>> http://www.adelaide.edu.au/biogas/
>>> and the Biogas Wiki http://biogas.wikispaces.com/
>>>
>>>
>>>
>>>
>>> --
>>> Vianney Tumwesige
>>>
>>> Director - Green Heat (U) Ltd  [image: Picture]
>>> 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
>>>
>>>
>>>
>>>  <http://trustvianney.wordpress.com/>
>>>
>>>
>>>
>>> _______________________________________________
>>> Digestion mailing list
>>>
>>> to Send a Message to the list, use the email address
>>> Digestion at bioenergylists.org
>>>
>>> to UNSUBSCRIBE or Change your List Settings use the web page
>>>
>>> http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org
>>>
>>> for more information about digestion, see
>>> Beginner's Guide to Biogas
>>> http://www.adelaide.edu.au/biogas/
>>> and the Biogas Wiki http://biogas.wikispaces.com/
>>>
>>>
>>>
>>
>>
>> --
>> *
>>
>> Bryan A. Sanchez Marcum
>> *
>>
>>
>> _______________________________________________
>> Digestion mailing list
>>
>> to Send a Message to the list, use the email address
>> Digestion at bioenergylists.org
>>
>> to UNSUBSCRIBE or Change your List Settings use the web page
>>
>> http://lists.bioenergylists.org/mailman/listinfo/digestion_lists.bioenergylists.org
>>
>> for more information about digestion, see
>> Beginner's Guide to Biogas
>> http://www.adelaide.edu.au/biogas/
>> and the Biogas Wiki http://biogas.wikispaces.com/
>>
>>
>>
>
>
> --
> Vianney Tumwesige
> Director - Green Heat (U) Ltd  [image: Picture]
> 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
>
>
>  <http://trustvianney.wordpress.com/>
>
>

-- 
Vianney Tumwesige
Director - Green Heat (U) Ltd  [image: Picture]
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

 <http://trustvianney.wordpress.com/>
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