[Digestion] the perpetual motion machine

[Anand Karve]

Dear Chanakya and Hooroo,
A lot of people devised perpetual motion systems, which never worked because
they were closed systems. The losses of energy due to mechanical friction,
gavitational pull, and other causes slowed down and eventually stopped the
motion. But the natural systems, where green plants are involved, are open
systems, into which energy gets pumped in from outside in the form of
sunshine and raw materials enter the system in the form of carbon dioxide,
soil minerals and rainfall. They are thus designed to work perpetually and
we should take advantage of this phenomenon.
Yours
A.D.Karve

On Mon, Nov 22, 2010 at 7:36 AM, Paul Harris <paul.harris at adelaide.edu.au>wrote:

> G'day All,
>
> We do get on to some interesting topics!
>
> Of course there are losses in the integrated biosystem that have to be made
> up by rainfall, sunshine and gas transfer, plus whatever nutrients are
> exported in produce will eventually have to be made up (no, I'm not trying
> to restart a previous thread - please!). It depends where you draw the
> boundary and how tight the boundary is. I once gave a paper about
> Integrated
> biosystems and pointed out that Adelaide (where the Conference was) was a
> "loose" integrated biosystem as lot's of products crossed the boundary but
> Planet Earth is a "tight" integrated biosystem as very little enters or
> leaves the biosphere. I can't find that paper just now, but here is an
> Integrated Biosystems one if you want some brief information <
> http://www.adelaide.edu.au/biogas/website/integratedbiosys.pdf or
> PowerPoint
> http://www.adelaide.edu.au/biogas/website/IntegratedBiosystems.pdf>.
>
> 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
> http://www.adelaide.edu.au/directory/paul.harris
>
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> -----Original Message-----
> From: digestion-bounces at lists.bioenergylists.org
> [mailto:digestion-bounces at lists.bioenergylists.org] On Behalf Of Hoysall
> Chanakya
> Sent: Sunday, 21 November 2010 10:04 PM
> To: For Discussion of Anaerobic Digestion
> Subject: [Digestion] the perpetual motion machine
>
> The grand perpetual motion machine symptoms,
> Not really - what you need to see is that there will be losses and
> leakages from this "grand system" and to keep it running you need to
> reduce your energy losses to minimum and have practically no N losses.  At
> some scale your dream will come true.  Then of course comes the cost -->
> where you need to decide if it is worth it afterall.
> best wishes
> chanakya
>
>
>
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> http://www.adelaide.edu.au/biogas/
> and the Biogas Wiki http://biogas.wikispaces.com/
>
>


-- 
***
Dr. A.D. Karve
President, Appropriate Rural Technology Institute (ARTI)

*Please change my email address in your records to: adkarve at gmail.com *
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