[Digestion] Digestion Digest, Vol 5, Issue 17

Tue Nov 21 00:26:37 CST 2006

And you get hot water "for free"!

stan simon wrote:
> 
> 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.
> S. L. Simon Engineering P.A.
> 8060 160th Av NE
> Kerkhoven, MN 56252
> 320-264-5354 Phone/Fax
> 320-894-1117  Cell
> slsimon at tds.net
> 
> ----- Original Message -----
> From: <digestion-request at listserv.repp.org>
> To: <digestion at listserv.repp.org>
> Sent: Monday, November 20, 2006 12:00 PM
> Subject: Digestion Digest, Vol 5, Issue 17
> 
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> >
> > Today's Topics:
> >
> >   1. Re: flex-use bio gas plant (Paul Harris)
> >   2. flex use biogas plant (Zietsman, Rex)
> >
> >
> > ----------------------------------------------------------------------
> >
> > Message: 1
> > Date: Mon, 20 Nov 2006 15:54:08 +1030
> > From: Paul Harris <paul.harris at adelaide.edu.au>
> > Subject: Re: [Digestion] flex-use bio gas plant
> > To: Art Krenzel <phoenix98604 at msn.com>
> > Cc: digestion at listserv.repp.org
> > Message-ID: <45613BF8.8A71673D at adelaide.edu.au>
> > Content-Type: text/plain; charset=us-ascii
> >
> > G'day All,
> >
> > Thanks Art (and Peter Z) for your comments.
> >
> > One of my favourite sayings is "Minds are like parachutes - they only
> > function when open!" and a while back I realised both are often only
> > used in emergencies!
> >
> > In reading many e-mails that I receive (and other comments/questions!) I
> > think many people start from the premise "we need cars/trucks for
> > transport!" or "we need electricity for ...." without thinking of other
> > approaches that may have a much lower energy demand and/or be a much
> > better use of the available resource.
> >
> > Each form of energy has its preferred applications (to which it is
> > inherintly suited) and can also be transformed into other forms (with a
> > variable loss in efficiency). Why not minimise the efficiency loss (of
> > the larger system, NOT just the unit!!) by using different forms
> > appropriately?
> >
> > Happy digesting,
> > HOOROO
> >
> > Art Krenzel wrote:
> >>
> >> Peter,
> >>
> >> I agree with Paul on not wasting the energy to clean up the biogas to
> >> pipeline quality but rather use it on site.
> >>
> >> You have a nice draw card for another industry to co-locate with you.
> >> Someone has a need (or want) to use renewable energy for their process
> >> and
> >> can provide a topping cycle consumption of your biogas product.  It might
> >> be
> >> a seasonal business which is in cycle with your gas production for
> >> instance.
> >>
> >> Be Brave!  Be Original!  Be Creative!
> >>
> >> Art Krenzel
> > --
> > 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: 2
> > Date: Mon, 20 Nov 2006 09:30:16 +0200
> > From: "Zietsman, Rex" <Rex at Process.co.za>
> > Subject: [Digestion] flex use biogas plant
> > To: <digestion at listserv.repp.org>
> > Message-ID:
> > <15158807F724CB4593BF508C151108CC4B3025 at scalpel.imsgroup.local>
> > Content-Type: text/plain; charset="us-ascii"
> >
> > Jason, Bjorn & Listers,
> > One of the best comments made on Digestion Digest, Vol 5, Issue 15 is
> > that the Internet provides so much help to one another.
> > I am looking to build a digestor that will treat cow & pig manure with
> > the gas driving an engine to produce power. As we will have a small
> > dairy, we need cold. Instead of an absorption chiller, the engine
> > supplier I was in contact with via the Internet suggested that I bolt on
> > a car's A/C compressor and use that to generate cold. Not only is the
> > equipment proven, it is easy to maintain (second hand units are freely
> > available and relatively cheap). If you need more cooling than a car's
> > A/C compressor, get a bigger compressor as you will have a bigger engine
> > because you will have more cows generating more biogas!
> > Another lister, Steve from New Zealand, sent me an article on using
> > water to remove CO2. Essentially, if you have a multi-stage compressor
> > to get up the pressures required for gas powered vehicles, you pull the
> > gas off after the first stage say at 5 bar, pass it through a column
> > irrigated by water and the water will absorb the CO2 just as in a fizzy
> > cooldrink. The CO2 loaded water is pumped to an open tank and irrigated
> > onto the surface. As the water depressurises, the CO2 escapes to
> > atmosphere. The water is then recycled to the scrubbing tower. The gas
> > in the meanwhile leaves the top of the tower and goes into the second
> > stage of the compressor. Just remember that there should be water traps
> > after each stage (anyone working with air compressors will also tell you
> > that). Finally, the beauty of the water scrubber is that if you add a
> > small about of alkali (lime, caustic, etc), you will also capture H2S!
> > This is a double win.
> > Cheers
> > Rex
> >
> >
> >
> >
> > ------------------------------
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> > End of Digestion Digest, Vol 5, Issue 17
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> >
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-- 
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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