[Digestion] Digestion Digest, Vol 5, Issue 20
stan simon
slsimon at tds.net
Thu Nov 23 16:31:04 CST 2006
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.
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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
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> Today's Topics:
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> 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
>
>
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>> 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.
>>
>>
>>
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>>
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>> 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
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> ------------------------------
>
> 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.
>>
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>
> *** 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
>
>
>
> ---------------------------------
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