[Stoves] Compact biogas plant

[adkarve]

This energy to lift the weight is provided only once, but the bacteria then
have to work against the pressure all the time. That is why there is less
gas if the digester is put under pressure.
Yours
A.D.Karve
----- Original Message -----
From: David G. LeVine <dlevine at speakeasy.net>
To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>
Sent: Tuesday, May 08, 2007 10:43 PM
Subject: Re: [Stoves] Compact biogas plant


> Okay, so how does the weight get on the holder?
>
> Work is weight through an energy difference (on earth, usually a
> distance under gravity.)  It requires energy to do that work.
>
> Just because YOU don't supply the energy doesn't mean that energy is
> not supplied.  When you burn wood, you supply no energy, but the sun
> supplied the energy content of the wood.  When the gas is compressed
> the energy to do so comes from somewhere.  You may not supply it, the
> gas producing organisms do.
>
> That is the real issue that politicians have, they will give you free
> money than raise taxes to cover the cost of government.  That money
> is part of the "cost of government."
>
> The compressed gas is "free", but something pays the "tax", in this
> case the digester pays the tax and reduces the output, much like any
> political organism.  Raise the "tax" high enough, and the whole thing
> collapses.  That is pretty simple.
>
> At 03:09 AM 5/8/2007, you wrote:
> >No energy is used to compress the gas. We just put a weight on the gas
> >holder so that the weight presses on the gas in the gas holder. It is the
> >gravity of earth that is working for us.
> >Yours
> >  A.D.Karve
> >
> >----- Original Message -----
> >From: David G. LeVine <dlevine at speakeasy.net>
> >To: Discussion of biomass cooking stoves <stoves at listserv.repp.org>
> >Sent: Monday, May 07, 2007 7:43 AM
> >Subject: Re: [Stoves] Compact biogas plant
> >
> >
> > > At 12:26 PM 5/6/2007, you wrote:
> > > >In all such cases, we found that the amount of biogas produced under
> > > >pressure was less than the amount produced without the weight.
> > >
> > > Question:  If energy is used to pressurize gas, where does it come
from?
> > >
> > > Question:  If the energy used to compress the gas is not needed,
> > > where does it go?
> > >
> > > I believe (and I can be wrong) that the amount of gas is related to
> > > the energy used for other processes.  If I use 1 MJ to compress the
> > > gas, that 1 MJ comes from somewhere, and is no longer available for
> > > gas production.
> > >
> > >
> > > David G. LeVine
> > > Nashua, NH  03060
> > >
> > >
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> >
> >
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>
> David G. LeVine
> Nashua, NH  03060
>
>
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