🚀 go-pugleaf

"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:417cb994$0$32547$afc38c87@news.optusnet.com.au...
>
>
> Sylvia Else wrote:
>
> >
> >
> > Eunometic wrote:
> >
> >> hubbca2003@yahoo.com.au (Carole) wrote in message
> >> news:<77ed1283.0410200711.bd4e58b@posting.google.com>...
> >>
> >>> bernxard@yahoo.com.au (The Enlightenment) wrote in message
> >>> news:<39556695.0410190559.643eb88f@posting.google.com>...
> >>>
> >>>> Australia has always been a country sparse in water resources.  We've
> >>>> all known this since childhood and have always known that we need to
> >>>> manage the resource wisely. Why then have the Laboral elites been
> >>>> increasing Our population through immigraion at a rate of 130,000 per
> >>>> year?
> >>>
> >>>
> >>> There was a 4Corners show on Monday. Ticki Fullerton interviewed Bob
> >>> Carr and others and the show discussed feasibility of different
> >>> options from turning sea water into fresh water and recycling grey
> >>> water for human consumption which is being done successfully in some
> >>> countries.
> >>> http://www.abc.net.au/4corners/content/2004/s1220624.htm
> >>>
> >>>
> >>>> The latest scheme is to divert millions of mega-litres of water from
> >>>> the shoalhaven river to Sydney (where 60% of migrants settle).  This
> >>>> is ofcourse not really Sydneys water but should belong to the region.
> >>>>
> >>>> We will go through a phase of diverting a few minor rivers (at great
> >>>> expense for little gain) the effect of which will be to further
> >>>> worseneing environmental flows and changing the ecology of these
> >>>> rivers, we are begining some farcical water conservation measures
> >>>> which will in general add progressively higher expenses for
diminising
> >>>> returns.  All of these measures will only stave of for a short time
> >>>> the increaes in annual water bills of possibly a thousand dollars per
> >>>> household that will be needed to support coal powered desalination.
> >>>>
> >>>> Immigraion has of course become a sacred cow: driven by ethnic
special
> >>>> interest groups and pandering politicians, driven by businesses who
> >>>> desire market growth and cheaper labour for their lacklustre
> >>>> management and owners.  Driven by wealthy pro-immigration post war
> >>>> Jewish immigrants such as Frank Lowey, Richard Pratt and Lou Solomon,
> >>>> driven by brain dead lunar leftists.
> >>>
> >>>
> >>> Carole
> >>> http://www.austarmetro.com.au/~hubbca/water_agenda.htm
> >>
> >>
> >>
> >> I had a look at hoth links that you provided.
> >>
> >> The first link, to the 4 corners site, starts of "once we had water to
> >> waste".  This is rubbish.  Australians DON'T waste water or use
> >> unreasonable quantities though there is room for improvement in
> >> substance there is not too much to be done.
> >>
> >> They are trying to put a guilt trip on Australians to distract from
> >> their own neglect and mismanagement of water resources and yes of the
> >> population they have irresponsbly doubled in Sydney over the last 25
> >> years and continue to do so.
> >>
> >> We are all going to pay and the quality of our lives will lower.
> >>
> >> Desalination is possible but at a great cost.  The price is 4-5 times
> >> that of rainwater collected in Dams and inevitably it requires energy
> >> that will only add to Greenhouse effects and our energy dependancy.
> >> The energy requirements are around 10kw.hr/kLitre for reverse osmosis
> >> and 4 kw.hr/kLitre for multistage flash distillation a process which
> >> while efficient requires expesnive decalcination.
> >
> >
> > Anyone calculated the minimum theoretical power requirement? I'm rather
> > surprised that reverse osmosis is that inefficient.
>
> OK, I did it. The figure I get is only 0.6 kWHr/kL, which is
> surprisingly low, and rather implies that the best technology currently
> available is only 15% efficient. It also seems to imply that reverse
> osmosis heats the water by 8 degrees celsius. Anyone know whether that's
> right?
>
> Sylvia.
>

Dissipation of heat from the pump.
See section 4.  http://urila.tripod.com/Seawater.htm