[Digestion] Digestion Digest, Vol 5, Issue 21
stan simon
slsimon at tds.net
Fri Nov 24 12:17:24 CST 2006
If you are talking about relative humidity there may be a change in that
parameter through compression and expansion , however absolute humidity
will not change without some separation of liquefied water out of the
process.
The post that I was responding to did not mention anything about
compressing, refrigerating and expanding the methane.
What is the gasifier that you are referring to? I thought we were looking
at a digester producing impure methane with 40 % CO2, H2S, and saturated
with water vapor.
Northern Climate ground based IC engines operate at well below 60F intake
air temperature, this is a variable that can range down to -50F depending on
where the system is .
Without some specific datapoints at each of the stages in this process,
(temperature, pressure, mole fractions of each gas) it is very difficult to
make precise predictions.
As for the low COP of absorption this is a well known fact, the double or
triple stage units are better, the idea is to utilize waste heat or some
other inexpensive source of energy. To simply throw away the 65% engine
heat of rejection has been a common practice.
----- Original Message -----
From: <digestion-request at listserv.repp.org>
To: <digestion at listserv.repp.org>
Sent: Thursday, November 23, 2006 4:31 PM
Subject: Digestion Digest, Vol 5, Issue 21
> Send Digestion mailing list submissions to
> digestion at listserv.repp.org
>
> To subscribe or unsubscribe via the World Wide Web, visit
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
> or, via email, send a message with subject or body 'help' to
> digestion-request at listserv.repp.org
>
> You can reach the person managing the list at
> digestion-owner at listserv.repp.org
>
> When replying, please edit your Subject line so it is more specific
> than "Re: Contents of Digestion digest..."
>
>
> Today's Topics:
>
> 1. Re: condensation in gas lines (Art Krenzel)
> 2. Re: Digestion Digest, Vol 5, Issue 20 (stan simon)
> 3. Re: Digestion Digest, Vol 5, Issue 20 (stan simon)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 23 Nov 2006 10:52:20 -0800
> From: "Art Krenzel" <phoenix98604 at msn.com>
> Subject: Re: [Digestion] condensation in gas lines
> To: <DIGESTION at LISTSERV.REPP.ORG>
> Message-ID: <BAY108-DAV1ECEE69252B835D81FC609BE20 at phx.gbl>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Stan,
>
> I think there is a fundamental error in this thinking about air saturated
> with water vapor after a compression process.
>
> If you have a water saturated gas stream at 5 atmospheres at room
> temperature and just allow the gas to drop to atmospheric pressure as you
> would to feed it into the intake of an IC engine, the natural humidity
> content of the gas DROPS.
>
> This is the basic process for removing water from instrument air. You
> take
> a airstream which is saturated with water at room temperature and compress
> it to a higher pressure. Then cool it (using refrigeration) and the water
> precipitates out, release the pressure again and now you have operating
> dew
> points in the -40 deg F range.
>
> You may not have a saturated air problem after all.
>
> As a pilot, carburetor icing can occur at a wide range of temperatures but
> are more common with water saturated air streams below 40-50 degree F.
> Most
> ground based IC engines operate in an environment of 60 - 100 deg F range
> using 50% relative humidity air and carburetor icing is not considered a
> problem.
>
> I like the idea of using waste heat and the romance of absorption
> refrigeration but the Coefficient of Performance of the absorption process
> is quite low. The gases exiting the gasifier come out at 1200 - 1500
> degrees F. Why don't you recover that heat and use it to heat the
> gasifier
> intake air. You also gain by cooling the product gases so you can feed
> them
> into an IC engine at normal temperatures. There should be a favorable
> balance of energy to heat the gasifier feed air to a high temperature
> easily. The location of the hot and cool airstreams are adjacent so the
> insulated piping of the air becomes much easier than ducting from an IC
> engine located some distance from the gasifier.
>
> Art Krenzel, P.E.
>
>
>>
>>> Gentlemen,
>>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>>> that was saturated with water vapor? I'm not sure what this would do
>>> inan engine. Maybe cause icing in your carburetor?
>>> The beauty of absorption cooling is that it is driven primarily by low
>>> quality (thermal) energy rather than expensive shaft power or
>>> electricity. Hence you could make electricity with your methane and then
>>> use the waste engine jacket and exhaust pipe heat to create cooling.
>>> Have your cake and eat it too.
>>> Stan L Simon, P.E.
>>>
>>>
>>
>> _______________________________________________
>> Digestion mailing list
>> Digestion at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>
>
>
>
>
> ------------------------------
>
> Message: 2
> Date: Thu, 23 Nov 2006 16:20:23 -0600
> From: "stan simon" <slsimon at tds.net>
> Subject: Re: [Digestion] Digestion Digest, Vol 5, Issue 20
> To: <digestion at listserv.repp.org>
> Message-ID: <002e01c70f4d$94538b30$649a1545 at COMPUTER1>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> Yazaki water fired chillers are available in 10, 20 or 30 ton.
>
>
> ----- Original Message -----
> From: <digestion-request at listserv.repp.org>
> To: <digestion at listserv.repp.org>
> Sent: Thursday, November 23, 2006 12:00 PM
> Subject: Digestion Digest, Vol 5, Issue 20
>
>
>> Send Digestion mailing list submissions to
>> digestion at listserv.repp.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>> or, via email, send a message with subject or body 'help' to
>> digestion-request at listserv.repp.org
>>
>> You can reach the person managing the list at
>> digestion-owner at listserv.repp.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Digestion digest..."
>>
>>
>> Today's Topics:
>>
>> 1. Re: Digestion Digest, Vol 5, Issue 19 (stan simon)
>> 2. Request from Zambia (Paul Harris)
>> 3. condensation in gas lines (Zietsman, Rex)
>> 4. Re: condensation in gas lines (Mike Barnett)
>> 5. Re: Request from Zambia (David Fulford)
>> 6. Mixing of CO, Hydrogen and Methane (Madhu Ranganathan)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 22 Nov 2006 17:29:23 -0600
>> From: "stan simon" <slsimon at tds.net>
>> Subject: Re: [Digestion] Digestion Digest, Vol 5, Issue 19
>> To: <digestion at listserv.repp.org>
>> Message-ID: <002d01c70e8e$0ce704c0$b29a1545 at COMPUTER1>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> I am not sure what amount of cooling you need, are you trying to cool the
>> milk tank or the whole barn?
>>
>> An automotive compressor and condensor will give you about 5 tons of
>> cooling. Trane, Carrier or York Absorption chillers start at about 100
>> tons. That smallest size would probably be the least economical.
>>
>> Yazaki advertised a hot water absorption chiller, not sure what size
>> range
>> they have. There may be others.
>> ----- Original Message -----
>> From: <digestion-request at listserv.repp.org>
>> To: <digestion at listserv.repp.org>
>> Sent: Wednesday, November 22, 2006 12:00 PM
>> Subject: Digestion Digest, Vol 5, Issue 19
>>
>>
>>> Send Digestion mailing list submissions to
>>> digestion at listserv.repp.org
>>>
>>> To subscribe or unsubscribe via the World Wide Web, visit
>>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>> or, via email, send a message with subject or body 'help' to
>>> digestion-request at listserv.repp.org
>>>
>>> You can reach the person managing the list at
>>> digestion-owner at listserv.repp.org
>>>
>>> When replying, please edit your Subject line so it is more specific
>>> than "Re: Contents of Digestion digest..."
>>>
>>>
>>> Today's Topics:
>>>
>>> 1. AC compressor on engine for chilling (Zietsman, Rex)
>>>
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Message: 1
>>> Date: Wed, 22 Nov 2006 15:26:41 +0200
>>> From: "Zietsman, Rex" <Rex at Process.co.za>
>>> Subject: [Digestion] AC compressor on engine for chilling
>>> To: <digestion at listserv.repp.org>
>>> Message-ID:
>>> <15158807F724CB4593BF508C151108CC4B304A at scalpel.imsgroup.local>
>>> Content-Type: text/plain; charset="us-ascii"
>>>
>>> Stan,
>>> Have you tried buying an absorption chiller? We have been quoted $100k
>>> for a 400kW chiller by York. These machines, while conceptually a good
>>> idea, are simply off the cost scale. The next best thing is to use a
>>> fridge design. That is a lot more difficult to install and make to work
>>> than bolting an AC compressor onto a motor that may already have the
>>> bracket for it and the pulley to provide a V-belt drive. If you have a
>>> neat way of going the absorption chiller route, I am all for it - gimme,
>>> gimme!
>>>
>>> Gentlemen,
>>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>>> that was saturated with water vapor? I'm not sure what this would do in
>>> an engine. Maybe cause icing in your carburetor?
>>> The beauty of absorption cooling is that it is driven primarily by low
>>> quality (thermal) energy rather than expensive shaft power or
>>> electricity. Hence you could make electricity with your methane and then
>>> use the waste engine jacket and exhaust pipe heat to create cooling.
>>> Have your cake and eat it too.
>>> Stan L Simon, P.E.
>>>
>>>
>>>
>>> ------------------------------
>>>
>>> _______________________________________________
>>> Digestion mailing list
>>> Digestion at listserv.repp.org
>>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>>
>>> End of Digestion Digest, Vol 5, Issue 19
>>> ****************************************
>>>
>>
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Thu, 23 Nov 2006 12:40:08 +1030
>> From: Paul Harris <paul.harris at adelaide.edu.au>
>> Subject: [Digestion] Request from Zambia
>> To: digestion <DIGESTION at LISTSERV.REPP.ORG>
>> Message-ID: <45650300.3AC30824 at adelaide.edu.au>
>> Content-Type: text/plain; charset=us-ascii
>>
>> The message below had an image attached.
>>
>>>From rex at process.co.za
>> To all whom it may concern
>> I would like to produce mathanne biogas from cow dung.I need a DEMO
>> basic
>> plan how to estabilish the metioned plant.If any one who has made the
>> above said plant which produced biomethanne gas FROM MANURE send , I AM
>> GOING TO BE VERY GLAD,
>> With my best regards.
>> ENVER ERDOGDU
>>
>> Enver
>> --
>> Mr. Paul Harris
>> Faculty of Sciences, DP710
>> The University of Adelaide, Roseworthy Campus, AUSTRALIA 5371
>> Ph : +61 8 8303 7880
>> Fax : +61 8 8303 7979
>> mailto:paul.harris at adelaide.edu.au
>> I now use "Spam Assassin" - if you do not get a reply please make
>> contact again (by fax?)
>> http://www.ees.adelaide.edu.au/people/soil/pharri01.html
>> Member IOBB http://www.iobbnet.org/drupal/
>>
>> 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.
>>
>>
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Thu, 23 Nov 2006 06:47:25 +0200
>> From: "Zietsman, Rex" <Rex at Process.co.za>
>> Subject: [Digestion] condensation in gas lines
>> To: <digestion at listserv.repp.org>
>> Message-ID:
>> <15158807F724CB4593BF508C151108CC4B3053 at scalpel.imsgroup.local>
>> Content-Type: text/plain; charset="us-ascii"
>>
>>
>>
>> Stan has a point about condensation. The same can also be said about
>> using a wet scrubber and to a lesser extent to condensing out tars. Good
>> practise would be to have a low point water trap that you drain every
>> day if you stop the gasifier. If it runs continuously, you put two
>> valves in with a short piece of pipe in between. To drain, with the
>> bottom valve closed, open the top valve to allow condensate to fill the
>> pipe. Close the top valve and open the bottom valve and drain. Repeat.
>> Rex
>>
>> Gentlemen,
>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>> that was saturated with water vapor? I'm not sure what this would do
>> inan engine. Maybe cause icing in your carburetor?
>> The beauty of absorption cooling is that it is driven primarily by low
>> quality (thermal) energy rather than expensive shaft power or
>> electricity. Hence you could make electricity with your methane and then
>> use the waste engine jacket and exhaust pipe heat to create cooling.
>> Have your cake and eat it too.
>> Stan L Simon, P.E.
>>
>>
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Thu, 23 Nov 2006 07:20:42 -0500
>> From: "Mike Barnett" <dreadlox at cwjamaica.com>
>> Subject: Re: [Digestion] condensation in gas lines
>> To: "The Digestion Discussion List" <DIGESTION at LISTSERV.REPP.ORG>
>> Message-ID: <006701c70ef9$cb9d07a0$0100000a at Mikey>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> I agree with you Stan.
>>
>> Many more people would go this route if only however, there were a small
>> enough system based on this technology....
>>
>>>From what I have seen, the Yazaki type machines are all over 100 tons or
>> up.... :-(
>>
>> Mike
>> JAMAICA
>>
>>
>>
>>
>>> Gentlemen,
>>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>>> that was saturated with water vapor? I'm not sure what this would do
>>> inan engine. Maybe cause icing in your carburetor?
>>> The beauty of absorption cooling is that it is driven primarily by low
>>> quality (thermal) energy rather than expensive shaft power or
>>> electricity. Hence you could make electricity with your methane and then
>>> use the waste engine jacket and exhaust pipe heat to create cooling.
>>> Have your cake and eat it too.
>>> Stan L Simon, P.E.
>>>
>>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 5
>> Date: Thu, 23 Nov 2006 15:10:36 +0000
>> From: David Fulford <d.j.fulford at reading.ac.uk>
>> Subject: Re: [Digestion] Request from Zambia
>> To: rex at process.co.za,digestion <DIGESTION at LISTSERV.REPP.ORG>
>> Message-ID: <5.2.1.1.2.20061123141917.03d70df8 at pophost.rdg.ac.uk>
>> Content-Type: text/plain; charset="us-ascii"; format=flowed
>>
>> Dear Enver,
>>
>> You could buy my book on the subject:
>> D.J. Fulford "Running a biogas Programme: A handbook"
>> Published by Intermediate Technology Development Group, London (1988)
>> ISBN 0 946688 49 4
>> http://www.developmentbookshop.com/detail.aspx?ID=491
>>
>> It is also available from Amazon.com.
>>
>> Govinda Devkota is working as an international consultant on biogas. He
>> recently built a plant in Gambia. His e-mail is:
>> govinda devkota <govindadevkota at yahoo.com>. He also has a book that he
>> could sell you.
>>
>> regards,
>>
>> David F
>>
>> At 12:40 23/11/2006 +1030, Paul Harris wrote:
>>>The message below had an image attached.
>>>
>>> >From rex at process.co.za
>>>To all whom it may concern
>>>I would like to produce mathanne biogas from cow dung.I need a DEMO
>>>basic
>>>plan how to estabilish the metioned plant.If any one who has made the
>>>above said plant which produced biomethanne gas FROM MANURE send , I AM
>>>GOING TO BE VERY GLAD,
>>>With my best regards.
>>>ENVER ERDOGDU
>>>
>>>Enver
>>>--
>>>Mr. Paul Harris
>>>Faculty of Sciences, DP710
>>>The University of Adelaide, Roseworthy Campus, AUSTRALIA 5371
>>>Ph : +61 8 8303 7880
>>>Fax : +61 8 8303 7979
>>>mailto:paul.harris at adelaide.edu.au
>>>I now use "Spam Assassin" - if you do not get a reply please make
>>>contact again (by fax?)
>>>http://www.ees.adelaide.edu.au/people/soil/pharri01.html
>>>Member IOBB http://www.iobbnet.org/drupal/
>>>
>>>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.
>>>
>>>_______________________________________________
>>>Digestion mailing list
>>>Digestion at listserv.repp.org
>>>http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>
>> *** Dr David Fulford, MSc Renewable Energy, Engineering Building ***
>> *** School of Construction Management and Engineering ***
>> *** The University of Reading, Whiteknights, ***
>> *** Reading RG6 6AY, UK Tel: +44-(0)118-378 8563, ***
>> *** Fax: +44-(0)118-931 3327 E-mail: D.J.Fulford at Reading.ac.uk ***
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 6
>> Date: Thu, 23 Nov 2006 07:40:18 -0800 (PST)
>> From: Madhu Ranganathan <madhurangi at yahoo.com>
>> Subject: [Digestion] Mixing of CO, Hydrogen and Methane
>> To: Digestion <digestion at listserv.repp.org>
>> Message-ID: <538271.61332.qm at web53013.mail.yahoo.com>
>> Content-Type: text/plain; charset=iso-8859-1
>>
>> Hi,
>>
>> I have a rice husk gasifying plant (pyrolysis) and the gas from it
>> is used to fire a boiler. I also have a biogas plant coming up (which
>> would use starchy material as base). I was wondering if it could be
>> possible to mix the methane from the biogas plant with the CO and
>> hydrogen
>> gases from the gasifier and use the same burner to burn it..... could
>> mixing of these gases have any adverse effects especially with regards to
>> safety.
>>
>> Another question which I want to ask is the availiblity of Mono ethanol
>> amine in Chennai. I read somewhere that it has very good carbon dioxide
>> absorbing power. I plan to remove hydrogen sulphide by passing it thru
>> steel wool and then bubble the biogas thru MEA to remove CO2.
>>
>> Madhu Ranganathan
>> Cuddalore, India
>>
>>
>>
>> ---------------------------------
>> Want to start your own business? Learn how on Yahoo! Small Business.
>>
>> ------------------------------
>>
>> _______________________________________________
>> Digestion mailing list
>> Digestion at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>
>> End of Digestion Digest, Vol 5, Issue 20
>> ****************************************
>>
>
>
>
>
>
> ------------------------------
>
> Message: 3
> Date: Thu, 23 Nov 2006 16:31:04 -0600
> From: "stan simon" <slsimon at tds.net>
> Subject: Re: [Digestion] Digestion Digest, Vol 5, Issue 20
> To: <digestion at listserv.repp.org>
> Message-ID: <000701c70f4f$11843ae0$649a1545 at COMPUTER1>
> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
> reply-type=original
>
> If you desire to burn your methane, Dometic (Servel) makes small gas fired
> chillers in the 3 to 25 ton range. No need for 3 phase electrical power.
> ----- Original Message -----
> From: <digestion-request at listserv.repp.org>
> To: <digestion at listserv.repp.org>
> Sent: Thursday, November 23, 2006 12:00 PM
> Subject: Digestion Digest, Vol 5, Issue 20
>
>
>> Send Digestion mailing list submissions to
>> digestion at listserv.repp.org
>>
>> To subscribe or unsubscribe via the World Wide Web, visit
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>> or, via email, send a message with subject or body 'help' to
>> digestion-request at listserv.repp.org
>>
>> You can reach the person managing the list at
>> digestion-owner at listserv.repp.org
>>
>> When replying, please edit your Subject line so it is more specific
>> than "Re: Contents of Digestion digest..."
>>
>>
>> Today's Topics:
>>
>> 1. Re: Digestion Digest, Vol 5, Issue 19 (stan simon)
>> 2. Request from Zambia (Paul Harris)
>> 3. condensation in gas lines (Zietsman, Rex)
>> 4. Re: condensation in gas lines (Mike Barnett)
>> 5. Re: Request from Zambia (David Fulford)
>> 6. Mixing of CO, Hydrogen and Methane (Madhu Ranganathan)
>>
>>
>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Wed, 22 Nov 2006 17:29:23 -0600
>> From: "stan simon" <slsimon at tds.net>
>> Subject: Re: [Digestion] Digestion Digest, Vol 5, Issue 19
>> To: <digestion at listserv.repp.org>
>> Message-ID: <002d01c70e8e$0ce704c0$b29a1545 at COMPUTER1>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> I am not sure what amount of cooling you need, are you trying to cool the
>> milk tank or the whole barn?
>>
>> An automotive compressor and condensor will give you about 5 tons of
>> cooling. Trane, Carrier or York Absorption chillers start at about 100
>> tons. That smallest size would probably be the least economical.
>>
>> Yazaki advertised a hot water absorption chiller, not sure what size
>> range
>> they have. There may be others.
>> ----- Original Message -----
>> From: <digestion-request at listserv.repp.org>
>> To: <digestion at listserv.repp.org>
>> Sent: Wednesday, November 22, 2006 12:00 PM
>> Subject: Digestion Digest, Vol 5, Issue 19
>>
>>
>>> Send Digestion mailing list submissions to
>>> digestion at listserv.repp.org
>>>
>>> To subscribe or unsubscribe via the World Wide Web, visit
>>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>> or, via email, send a message with subject or body 'help' to
>>> digestion-request at listserv.repp.org
>>>
>>> You can reach the person managing the list at
>>> digestion-owner at listserv.repp.org
>>>
>>> When replying, please edit your Subject line so it is more specific
>>> than "Re: Contents of Digestion digest..."
>>>
>>>
>>> Today's Topics:
>>>
>>> 1. AC compressor on engine for chilling (Zietsman, Rex)
>>>
>>>
>>> ----------------------------------------------------------------------
>>>
>>> Message: 1
>>> Date: Wed, 22 Nov 2006 15:26:41 +0200
>>> From: "Zietsman, Rex" <Rex at Process.co.za>
>>> Subject: [Digestion] AC compressor on engine for chilling
>>> To: <digestion at listserv.repp.org>
>>> Message-ID:
>>> <15158807F724CB4593BF508C151108CC4B304A at scalpel.imsgroup.local>
>>> Content-Type: text/plain; charset="us-ascii"
>>>
>>> Stan,
>>> Have you tried buying an absorption chiller? We have been quoted $100k
>>> for a 400kW chiller by York. These machines, while conceptually a good
>>> idea, are simply off the cost scale. The next best thing is to use a
>>> fridge design. That is a lot more difficult to install and make to work
>>> than bolting an AC compressor onto a motor that may already have the
>>> bracket for it and the pulley to provide a V-belt drive. If you have a
>>> neat way of going the absorption chiller route, I am all for it - gimme,
>>> gimme!
>>>
>>> Gentlemen,
>>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>>> that was saturated with water vapor? I'm not sure what this would do in
>>> an engine. Maybe cause icing in your carburetor?
>>> The beauty of absorption cooling is that it is driven primarily by low
>>> quality (thermal) energy rather than expensive shaft power or
>>> electricity. Hence you could make electricity with your methane and then
>>> use the waste engine jacket and exhaust pipe heat to create cooling.
>>> Have your cake and eat it too.
>>> Stan L Simon, P.E.
>>>
>>>
>>>
>>> ------------------------------
>>>
>>> _______________________________________________
>>> Digestion mailing list
>>> Digestion at listserv.repp.org
>>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>>
>>> End of Digestion Digest, Vol 5, Issue 19
>>> ****************************************
>>>
>>
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 2
>> Date: Thu, 23 Nov 2006 12:40:08 +1030
>> From: Paul Harris <paul.harris at adelaide.edu.au>
>> Subject: [Digestion] Request from Zambia
>> To: digestion <DIGESTION at LISTSERV.REPP.ORG>
>> Message-ID: <45650300.3AC30824 at adelaide.edu.au>
>> Content-Type: text/plain; charset=us-ascii
>>
>> The message below had an image attached.
>>
>>>From rex at process.co.za
>> To all whom it may concern
>> I would like to produce mathanne biogas from cow dung.I need a DEMO
>> basic
>> plan how to estabilish the metioned plant.If any one who has made the
>> above said plant which produced biomethanne gas FROM MANURE send , I AM
>> GOING TO BE VERY GLAD,
>> With my best regards.
>> ENVER ERDOGDU
>>
>> Enver
>> --
>> Mr. Paul Harris
>> Faculty of Sciences, DP710
>> The University of Adelaide, Roseworthy Campus, AUSTRALIA 5371
>> Ph : +61 8 8303 7880
>> Fax : +61 8 8303 7979
>> mailto:paul.harris at adelaide.edu.au
>> I now use "Spam Assassin" - if you do not get a reply please make
>> contact again (by fax?)
>> http://www.ees.adelaide.edu.au/people/soil/pharri01.html
>> Member IOBB http://www.iobbnet.org/drupal/
>>
>> 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.
>>
>>
>>
>> ------------------------------
>>
>> Message: 3
>> Date: Thu, 23 Nov 2006 06:47:25 +0200
>> From: "Zietsman, Rex" <Rex at Process.co.za>
>> Subject: [Digestion] condensation in gas lines
>> To: <digestion at listserv.repp.org>
>> Message-ID:
>> <15158807F724CB4593BF508C151108CC4B3053 at scalpel.imsgroup.local>
>> Content-Type: text/plain; charset="us-ascii"
>>
>>
>>
>> Stan has a point about condensation. The same can also be said about
>> using a wet scrubber and to a lesser extent to condensing out tars. Good
>> practise would be to have a low point water trap that you drain every
>> day if you stop the gasifier. If it runs continuously, you put two
>> valves in with a short piece of pipe in between. To drain, with the
>> bottom valve closed, open the top valve to allow condensate to fill the
>> pipe. Close the top valve and open the bottom valve and drain. Repeat.
>> Rex
>>
>> Gentlemen,
>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>> that was saturated with water vapor? I'm not sure what this would do
>> inan engine. Maybe cause icing in your carburetor?
>> The beauty of absorption cooling is that it is driven primarily by low
>> quality (thermal) energy rather than expensive shaft power or
>> electricity. Hence you could make electricity with your methane and then
>> use the waste engine jacket and exhaust pipe heat to create cooling.
>> Have your cake and eat it too.
>> Stan L Simon, P.E.
>>
>>
>>
>> ------------------------------
>>
>> Message: 4
>> Date: Thu, 23 Nov 2006 07:20:42 -0500
>> From: "Mike Barnett" <dreadlox at cwjamaica.com>
>> Subject: Re: [Digestion] condensation in gas lines
>> To: "The Digestion Discussion List" <DIGESTION at LISTSERV.REPP.ORG>
>> Message-ID: <006701c70ef9$cb9d07a0$0100000a at Mikey>
>> Content-Type: text/plain; format=flowed; charset="iso-8859-1";
>> reply-type=original
>>
>> I agree with you Stan.
>>
>> Many more people would go this route if only however, there were a small
>> enough system based on this technology....
>>
>>>From what I have seen, the Yazaki type machines are all over 100 tons or
>> up.... :-(
>>
>> Mike
>> JAMAICA
>>
>>
>>
>>
>>> Gentlemen,
>>> Regarding the water based CO2 scrubbing, wouldn't this give you methane
>>> that was saturated with water vapor? I'm not sure what this would do
>>> inan engine. Maybe cause icing in your carburetor?
>>> The beauty of absorption cooling is that it is driven primarily by low
>>> quality (thermal) energy rather than expensive shaft power or
>>> electricity. Hence you could make electricity with your methane and then
>>> use the waste engine jacket and exhaust pipe heat to create cooling.
>>> Have your cake and eat it too.
>>> Stan L Simon, P.E.
>>>
>>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 5
>> Date: Thu, 23 Nov 2006 15:10:36 +0000
>> From: David Fulford <d.j.fulford at reading.ac.uk>
>> Subject: Re: [Digestion] Request from Zambia
>> To: rex at process.co.za,digestion <DIGESTION at LISTSERV.REPP.ORG>
>> Message-ID: <5.2.1.1.2.20061123141917.03d70df8 at pophost.rdg.ac.uk>
>> Content-Type: text/plain; charset="us-ascii"; format=flowed
>>
>> Dear Enver,
>>
>> You could buy my book on the subject:
>> D.J. Fulford "Running a biogas Programme: A handbook"
>> Published by Intermediate Technology Development Group, London (1988)
>> ISBN 0 946688 49 4
>> http://www.developmentbookshop.com/detail.aspx?ID=491
>>
>> It is also available from Amazon.com.
>>
>> Govinda Devkota is working as an international consultant on biogas. He
>> recently built a plant in Gambia. His e-mail is:
>> govinda devkota <govindadevkota at yahoo.com>. He also has a book that he
>> could sell you.
>>
>> regards,
>>
>> David F
>>
>> At 12:40 23/11/2006 +1030, Paul Harris wrote:
>>>The message below had an image attached.
>>>
>>> >From rex at process.co.za
>>>To all whom it may concern
>>>I would like to produce mathanne biogas from cow dung.I need a DEMO
>>>basic
>>>plan how to estabilish the metioned plant.If any one who has made the
>>>above said plant which produced biomethanne gas FROM MANURE send , I AM
>>>GOING TO BE VERY GLAD,
>>>With my best regards.
>>>ENVER ERDOGDU
>>>
>>>Enver
>>>--
>>>Mr. Paul Harris
>>>Faculty of Sciences, DP710
>>>The University of Adelaide, Roseworthy Campus, AUSTRALIA 5371
>>>Ph : +61 8 8303 7880
>>>Fax : +61 8 8303 7979
>>>mailto:paul.harris at adelaide.edu.au
>>>I now use "Spam Assassin" - if you do not get a reply please make
>>>contact again (by fax?)
>>>http://www.ees.adelaide.edu.au/people/soil/pharri01.html
>>>Member IOBB http://www.iobbnet.org/drupal/
>>>
>>>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.
>>>
>>>_______________________________________________
>>>Digestion mailing list
>>>Digestion at listserv.repp.org
>>>http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>
>> *** Dr David Fulford, MSc Renewable Energy, Engineering Building ***
>> *** School of Construction Management and Engineering ***
>> *** The University of Reading, Whiteknights, ***
>> *** Reading RG6 6AY, UK Tel: +44-(0)118-378 8563, ***
>> *** Fax: +44-(0)118-931 3327 E-mail: D.J.Fulford at Reading.ac.uk ***
>>
>>
>>
>>
>> ------------------------------
>>
>> Message: 6
>> Date: Thu, 23 Nov 2006 07:40:18 -0800 (PST)
>> From: Madhu Ranganathan <madhurangi at yahoo.com>
>> Subject: [Digestion] Mixing of CO, Hydrogen and Methane
>> To: Digestion <digestion at listserv.repp.org>
>> Message-ID: <538271.61332.qm at web53013.mail.yahoo.com>
>> Content-Type: text/plain; charset=iso-8859-1
>>
>> Hi,
>>
>> I have a rice husk gasifying plant (pyrolysis) and the gas from it
>> is used to fire a boiler. I also have a biogas plant coming up (which
>> would use starchy material as base). I was wondering if it could be
>> possible to mix the methane from the biogas plant with the CO and
>> hydrogen
>> gases from the gasifier and use the same burner to burn it..... could
>> mixing of these gases have any adverse effects especially with regards to
>> safety.
>>
>> Another question which I want to ask is the availiblity of Mono ethanol
>> amine in Chennai. I read somewhere that it has very good carbon dioxide
>> absorbing power. I plan to remove hydrogen sulphide by passing it thru
>> steel wool and then bubble the biogas thru MEA to remove CO2.
>>
>> Madhu Ranganathan
>> Cuddalore, India
>>
>>
>>
>> ---------------------------------
>> Want to start your own business? Learn how on Yahoo! Small Business.
>>
>> ------------------------------
>>
>> _______________________________________________
>> Digestion mailing list
>> Digestion at listserv.repp.org
>> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>>
>> End of Digestion Digest, Vol 5, Issue 20
>> ****************************************
>>
>
>
>
>
>
> ------------------------------
>
> _______________________________________________
> Digestion mailing list
> Digestion at listserv.repp.org
> http://listserv.repp.org/mailman/listinfo/digestion_listserv.repp.org
>
> End of Digestion Digest, Vol 5, Issue 21
> ****************************************
>
More information about the Digestion
mailing list