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Natural Science Forum / Physics / General Physics / April 2007



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Giant pipelines of freshwater to parched lands

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Brablo - 13 Jan 2007 05:01 GMT
The Alaska Pipelines were built in '68, and they're regarded as a
value-added engineering marvel.  Every day they pump tons of oil, and
they do so relatively efficiently.

In the same region, there is a lot of freshwater.  Also, diametrically
opposite of Alaska is the Antarctic region.  There are tons of
freshwater here as well melting everyday, I would think.

What are the possibilities of sending this water via pipelines to
parched lands (with big populations and/or good soil)?  Another
criteria for a good benificiary place of water disposal is that it
should not have a high altitude above sea level, since the water is
going to be pumped from the sea level area, I would think.  Some
possible choices of transporting mass amounts of water are:
1.  from Lake Baikal to the Gobi Desert.  NOTE:  Lake Baikal doesn't
have much area, but its volume of freshwater is HUGE!
2.  Caspian Sea to Israel/Palestine, where the soil is good, but the
land is dry.
3.  The melting mountain tops of Alaska to California, where the soil
is great, and the population is high, but it's dry there.
habshi - 13 Jan 2007 13:27 GMT
    Good idea , but the Romans did it first using gravity.
Maybe you could use solar energy pumps on the way to take the water
from the arctic to the desert fields.

The Alaska Pipelines were built in '68, and they're regarded as a
value-added engineering marvel.  Every day they pump tons of oil, and
they do so relatively efficiently.

In the same region, there is a lot of freshwater.  Also, diametrically
opposite of Alaska is the Antarctic region.  There are tons of
freshwater here as well melting everyday, I would think.

What are the possibilities of sending this water via pipelines to
parched lands (with big populations and/or good soil)?  Another
criteria for a good benificiary place of water disposal is that it
should not have a high altitude above sea level, since the water is
going to be pumped from the sea level area, I would think.  Some
possible choices of transporting mass amounts of water are:
1.  from Lake Baikal to the Gobi Desert.  NOTE:  Lake Baikal doesn't
have much area, but its volume of freshwater is HUGE!
2.  Caspian Sea to Israel/Palestine, where the soil is good, but the
land is dry.
3.  The melting mountain tops of Alaska to California, where the soil
is great, and the population is high, but it's dry there.
Sorcerer Androcles - 13 Jan 2007 15:51 GMT
> Good idea , but the Romans did it first using gravity.
> Maybe you could use solar energy pumps on the way to take the water
> from the arctic to the desert fields.

Arghh... then the sun will evaporate the water, clouds will form
over the solar power panels and we'll have to revert to fossil
fuel to pump the water. That's climate change you are advocating.

Bret Cahill - 13 Jan 2007 16:27 GMT
You'ld have to wrap the icebergs with plastic bags to keep the fresh
water separate from the sea water.

Bret Cahill
jimp@specsol.spam.sux.com - 13 Jan 2007 17:05 GMT
In sci.physics Bret Cahill <BretCahill@aol.com> wrote:
> You'ld have to wrap the icebergs with plastic bags to keep the fresh
> water separate from the sea water.

> Bret Cahill

What icebergs?

He was talking about piping liquid water.

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Brablo - 14 Jan 2007 02:26 GMT
I was referring to freshwater sources piped/pumped to parched lands
which are *far* from freshwater sources.
Eeyore - 14 Jan 2007 02:40 GMT
> I was referring to freshwater sources piped/pumped to parched lands
> which are *far* from freshwater sources.

Who's going to pay for this pipe ?

Graham
The Ghost In The Machine - 14 Jan 2007 04:02 GMT
In sci.physics, Eeyore
<rabbitsfriendsandrelations@hotmail.com>
wrote
on Sun, 14 Jan 2007 02:40:42 +0000
<45A9982A.CF0D34AA@hotmail.com>:

>> I was referring to freshwater sources piped/pumped to parched lands
>> which are *far* from freshwater sources.
>
> Who's going to pay for this pipe ?

Not to mention the pumps and the energy required to pump said water
through said pipe?

> Graham

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habshi - 15 Jan 2007 00:47 GMT
    Of course you cant use oil energy to move water along. However
free solar energy should do the trick. Btw nanosolar in California
have said they have reduced the cost of solar TENFOLD by printing
sheets of solar cells .
    If what is below is true , all our energy problems are solved
for ever.

http://www.nanosolar.com/
June 2006: Nanosolar secures $100,000,000 from leading investors.
Nanosolar commences with its plans to build a 430MW solar cell
factory.
Nanosolar is founded to make solar electricity cells 10 times less
expensive
Highlight 2006:

Nanosolar commits to building the world's largest thin-film solar cell
factory. Additional financing is secured. Continued outdoor and
accelerated indoor product durability testing is performed in order to
meet and exceed stringent government certification standards

Nanosolar is on track to make solar electricity:
cost-efficient for ubiquitous deployment
mass-produced on a global scale
available in many versatile forms.
Nanosolar has developed proprietary technology that makes it possible
to simply roll-print solar cells that require only 1/100th as thick an
absorber as a silicon-wafer cell (yet deliver similar performance and
durability). Watch the CNN video.

Our technology dramatically lowers the process cost and complexity
involved in the production of thin-film solar cells and makes it
possible to scale production very rapidly.

The result sets the standard for the technology and products that make
it possible to put A Solar Panel on Every Building™.

PALO ALTO, California - December 12th, 2006 - Nanosolar Inc., a global
leader in solar power innovation, today announced that it has selected
manufacturing sites located in California and in Germany. With these
two new sites, Nanosolar now has the capability to utilize up to
647,000 square feet for its cell and panel manufacturing as well as
research and development and regional company headquarters.

With its proprietary nanoparticle ink and fast roll-printing
technology, Nanosolar owns the processes and designs to make solar
electricity fundamentally less expensive. Nanosolar is presently
building manufacturing operations for its breakthrough solar
electricity technology and is on schedule to commence commercial
production in 2007
Sorcerer Androcles - 15 Jan 2007 00:57 GMT
> Of course you cant use oil energy to move water along. However
> free solar energy should do the trick.

Hey fuckhead! Do it, nobody is stopping you.
habshi - 15 Jan 2007 00:47 GMT
    One idea which even Jim cant rubbish , is black steel pipes
coming out of the ocean at a steep angle to say 100 ft above sea level
to be raised on stilts say 100ft inland.
    Water would evaporate into these steel pipes and rise to be
collected in closed troughs at the other end.The troughs would slope
gently inland a mile or so . Millions of famrs would go up in the
deserts next to the oceans.
Phineas T Puddleduck - 15 Jan 2007 00:52 GMT
>     One idea which even Jim cant rubbish , is black steel pipes
> coming out of the ocean at a steep angle to say 100 ft above sea level
[quoted text clipped - 3 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

Are you part of some Ministry of Silly Ideas?

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Eeyore - 15 Jan 2007 00:54 GMT
>         One idea which even Jim cant rubbish , is black steel pipes
> coming out of the ocean at a steep angle to say 100 ft above sea level
[quoted text clipped - 3 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

Good Lord !

That's possibly even stupider than usual for you Hashbrains.

Graham
Sorcerer Androcles - 15 Jan 2007 00:57 GMT
> One idea which even Jim cant rubbish , is black steel pipes
> coming out of the ocean at a steep angle to say 100 ft above sea level
[quoted text clipped - 3 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

Hey fuckhead! Do it, quit talking and get on with it.
jimp@specsol.spam.sux.com - 15 Jan 2007 02:15 GMT
In sci.physics habshi <hi@anony> wrote:
>         One idea which even Jim cant rubbish , is black steel pipes
> coming out of the ocean at a steep angle to say 100 ft above sea level
[quoted text clipped - 3 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

This is so ridiculous it isn't worth further comment other than you are
an idiot.

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Bill Ward - 15 Jan 2007 02:52 GMT
>     One idea which even Jim cant rubbish , is black steel pipes
> coming out of the ocean at a steep angle to say 100 ft above sea level to
[quoted text clipped - 3 lines]
> gently inland a mile or so . Millions of famrs would go up in the deserts
> next to the oceans.

Imagination is always a wonderful thing. . .
But reality is often a bitch.

Bill Ward
The Ghost In The Machine - 15 Jan 2007 04:43 GMT
In sci.physics, habshi
<hi@anony>
wrote
on Mon, 15 Jan 2007 00:47:04 GMT
<45aacca3.867296@news.clara.net>:
>     One idea which even Jim cant rubbish , is black steel pipes
> coming out of the ocean at a steep angle to say 100 ft above sea level
[quoted text clipped - 3 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

An interesting idea but there are a lot of problems.

If one starts with a liter of liquid water:

[1] 2.26 megajoules will need to be expended to convert it
to vapor.  If one does this in a shallow pan 10m x 10m x
1cm covered by a transparent glass or plastic filter, one
can evaporate a liter of water about every 22.6 seconds.
Maybe.

[2] That liter of water is 55.56 moles, and will expand
to a volume of about 1.368 m^3 (assuming a temperature of
300 K, or 26.85 C).

[3] An additional 300J is needed to lift it 100 feet.
Given the heat of vaporization already expended this
isn't much of a problem, though it would be interesting
contemplating a one-way valving system and running the
pipe up a mountainside.  (For the amount of flow here,
it's probably not worth the trouble.)

[4] The pipe will have to be sufficiently warm in order to prevent
premature condensation.  By bolting on appropriate reflectors, this
shouldn't be a major problem.

[5] At some point further down, the water will have to
condense.  This might have to be done in a shady spot, and
it is far from clear how easily one can dissipate the 2.26
megajoules of heat liberated per liter of condensed water.

In a prior post, I've mentioned that one needs 4.055 *
10^9 m^3 of water per year in order to generate $1B/year
worth of corn cropland.  That's 128.5 m^3 per second,
or 128500 liters per second.  That's a collector 600 km^2
in size (assuming 12 hours of sunlight) and that assumes
the other end actually can condense the water fast enough;
presumably that will require a cooling system that is also
about 600 km^2 in size.

And then there's the issue of actually keeping the cooling
system sufficiently cool so that the water actually does
condense, as opposed to simply sitting in the pipe or
wafting out as water vapor.  One might immerse the end
of the pipe into a shaded holding pond, but the pond will
be heated by the condensing water, which will probably
increase its *own* evaporation.

Since the vapor pressure of water at 30C is about 31.8 mmHg,
or 0.042 atm, the pressure differential in that pipe will be
negligible.

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habshi - 15 Jan 2007 23:51 GMT
    Instead of steel better to have plastic with coating so that
infra red rays are reflected back into the pipe .Also external solar
concentrators can focus sunlight on to these pipes. Billions of
gallons would evaporate and collected as fresh water.The sun pours out
4kw per sq meter in some of these areas !!
    One idea which even Jim cant rubbish , is glass pipes
coming out of the ocean at a steep angle to say 100 ft above sea level
to be raised on stilts say 100ft inland.
    Water would evaporate into these steel pipes and rise to be
collected in closed troughs at the other end.The troughs would slope
gently inland a mile or so . Millions of famrs would go up in the
deserts next to the oceans.
Bill Ward - 16 Jan 2007 01:21 GMT
>     Instead of steel better to have plastic with coating so that
> infra red rays are reflected back into the pipe .Also external solar
> concentrators can focus sunlight on to these pipes. Billions of gallons
> would evaporate and collected as fresh water.The sun pours out 4kw per sq
> meter in some of these areas !!

What planet are you on?
Dan Bloomquist - 16 Jan 2007 02:46 GMT
>>    Instead of steel better to have plastic with coating so that
>>infra red rays are reflected back into the pipe .Also external solar
[quoted text clipped - 3 lines]
>
> What planet are you on?

hashbrains' track record pretty much proves him a troll.......
jimp@specsol.spam.sux.com - 16 Jan 2007 03:15 GMT
In sci.physics habshi <hi@anony> wrote:
>         Instead of steel better to have plastic with coating so that
> infra red rays are reflected back into the pipe .Also external solar
[quoted text clipped - 8 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

Which is it, steel, plastic, or glass?

If you have a reflective IR coating, how do you get heat in in the
first place?

This is one is definitly in your top 10 of nonsensical babble.

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Eeyore - 16 Jan 2007 08:09 GMT
>         Instead of steel better to have plastic with coating so that
> infra red rays are reflected back into the pipe .Also external solar
[quoted text clipped - 8 lines]
> gently inland a mile or so . Millions of famrs would go up in the
> deserts next to the oceans.

You're an idiot.

Graham
habshi - 16 Jan 2007 23:06 GMT
    Ok lets work this out from first principles.
Imagine you have glass pipe open at one , with a vertical shelf
running down the middle, dividing it into an upper and lower half.
    Let the floor of the upper half be coated with with a
reflecting surface . So sunlight enters at the top and is reflected
back into the volume of the upper half . The open end is put into the
salty ocean or salty water anywhere and the glass tube slants upwards
at an angle to be held up with stilts or whatever. Fresh water will
evaporate and rise up the tube . The partition is open at the top end
so it turns  into the lower half where there is shade and it cools and
condenses about half way down and is led away in pipes.
    Ghost please tell me its workable , remember sunlight is free
, so I can patent the idea and grow very very rich.
jimp@specsol.spam.sux.com - 17 Jan 2007 01:55 GMT
In sci.physics habshi <hi@anony> wrote:
>         Ok lets work this out from first principles.
> Imagine you have glass pipe open at one , with a vertical shelf
[quoted text clipped - 9 lines]
>         Ghost please tell me its workable , remember sunlight is free
> , so I can patent the idea and grow very very rich.

This brain vomit, err, idea has been evaluated and found to be not
only unworkable, but the product of an idiot.

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Eeyore - 17 Jan 2007 05:04 GMT
>         Ok lets work this out from first principles.

Let's not.

Graham
The Ghost In The Machine - 19 Jan 2007 07:30 GMT
In sci.physics, habshi
<hi@anony>
wrote
on Tue, 16 Jan 2007 23:06:49 GMT
<45ad5905.975156@news.clara.net>:
>     Ok lets work this out from first principles.
> Imagine you have glass pipe open at one ,

?

Assuming "end".

> with a vertical shelf
> running down the middle, dividing it into an upper and lower half.

Erm...what precisely is the orientation of this pipe?  Assuming
vertical.

>     Let the floor of the upper half be coated with with a
> reflecting surface . So sunlight enters at the top and is reflected
> back into the volume of the upper half . The open end is put into the
> salty ocean or salty water anywhere and the glass tube slants upwards
> at an angle to be held up with stilts or whatever.

Ah, well that answers my one question, anyway. :-)

> Fresh water will
> evaporate and rise up the tube .

Erm...what water?  Is most of the tube submerged?  How does the water
get into the upper half?

As for rising...one reason water vapor rises is that there's relatively
cool, heavy air around it to take its place.

And then there's the salt issue.

> The partition is open at the top end
> so it turns  into the lower half where there is shade and it cools and
> condenses about half way down and is led away in pipes.

The water's condensation will heat the pipe.

>     Ghost please tell me its workable , remember sunlight is free
> , so I can patent the idea and grow very very rich.

I suppose one can but try, but I do have some additional questions.

[1] The pipe size?  I'll want both length and cylindrical radius or
diameter.

[2] The expected amount of distillate per second, hour, or day?

There's one thing in your favor: the ocean is a huge heat
sink.  However, water's heat of vaporization is about 2.26
MJ/kg; since insolation is about 1000 W/m^3 you're going
to want 2260 m^2 or 0.226 hectare of collector surface if
you want to vaporize 1 liter of water per second.

The best I can do is to build a collector tower of about
10m-15m in height.  Salt water would coat a black-colored
evaporation grate which is exposed to sunlight through a
transparent partition but sealed off from the ambient
air through a vaguely U-shaped affair, which dips into
the ocean, goes through pump number 1, then rises back up
*surrounding* itself (it's a shaded, double-walled pipe)
before being dropped into a holding tank.

As the water evaporates from near the evaporation grate, it
will establish an equilibrium within the system; however,
since the inner pipe of the doublewalled pipe is relatively
cool, water will tend to condense there, heating the outer
pipe's water.  However, at some point, pump number 1 will
trip on, drawing the condensed hot water into the sea
cooler and moving new cooled water into the outer tube,
and the warmed (but still distilled) water from the outer
tube into the holding tank.

Why the 10m-15m tube?  Simple.  The "hot" side of the
tower is in a partial vacuum, and I need that height to
prevent the distilled water from backwashing back into
the relatively open evaporator grate.  It turns out
barometric pressure, when expressed as meters H2O, is
about 10 meters H2O.

Instead of a pipe one might contemplate a flat plate
full of coils, which is more in line with a traditional
heat exchanger and would probably work better anyway.
Another heat exchanger dumps heat relatively deep into the
ocean, where it is hoped ocean currents will carry it away
from the (presumably anchored) desalination unit.

The entire figure might look a bit like the following.

             /====================\
             | |                 | |  _
             | |                 | |  ^
             | |                 | |  |
             | |                 | |
             | |                 | |  10m
sunlight      | |                 | |
 \ \         | |        auto     | |  |
   \ \       | |        pump   \ | |  v
             | |        switch  \| |  _
             | |                 |*|    /======== to holding tank
transparent   | |  transparent    | |   | |
  plastic    | |   plastic    +--+ +---+ +-+
+-------------- ----------+    |            |
|   partial vacuum        |    | heat exch  |
|                         |    |   #1       |
[----evaporation grate----]    |            |
|~~~~~~~~~~~~~~~~~~~~~~~~~|    |            |
|~~~~~~~~~sea water~~~~~~~|    +--+ +---+ +-+
|~~~~~~~~~~~~~~~~~~~~~~~~~|       | |    \=========\
|----filtration grate-----|~~~~~~~| |~~~~~~~~~~~~~| |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| |~~~~~~~~~~~~~| |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| |~~~~~~~~~~~~~| |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+--+ +-------+~~~~~| |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|            |~~~~~| |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| heat dumper|~~~~~| |
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|   #2       ====[]=/
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~|            |  pump unit
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~+------------+  (solar powered)

In order to prime the unit (assuming the piping etc.
is strong enough) steam might be introduced from the outlet
which normally goes into the holding tank.  That will
flush out the air (which will bubble somewhere below the
collecting tank).  Some of the steam should cool near the
heat dumper, and hopefully enough liquid water will collect
there for the solar powered pump to begin operation --
although one might have to introduce fresh water as well,
to prime things.  In fact, it might be easier to use fresh
water to prime the unit rather than steam.

The vapor pressure of water at 30 C is about 31.8 mm Hg, or
4240 Pascal.

The main problem I see with this unit is the filtration
grate; presumably it will have to be replaced as barnacles
might collect there.  There might be issues with salt
deposits on top of the collector chamber as well, from
wave action/spillage.

That, and the fact that it might not be worth diddly squat
unless it's absolutely huge.

It turns out I've misdrawn this slightly; the collector grate
will have to be almost 10m above sea level anyway.  But you
get the idea.

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habshi - 22 Jan 2007 01:05 GMT
    You have the salt water in the oceans , you have 4,000 MW of
energy pouring down on the desert next to it , this is about four
times what Hoover dam supplies. Why cant scientists make a contraption
which can heat the salt water with this energy , it evaporates via a
one way valve into the another pipe and a closed tank and stays there
till nightfall when the cold desert air condenses it into water from
where solar pumps take it to the fields. The nearby desert blooms
whenever the water comes so it is quite fertile really.
habshi - 22 Jan 2007 01:16 GMT
correction
    You have the salt water in the oceans , you have 4,000 MW of
energy per square mile  pouring down on the desert next to it , this
is about four
times what Hoover dam supplies. Why cant scientists make a contraption
which can heat the salt water with this energy , it evaporates via a
one way valve into the another pipe and a closed tank and stays there
till nightfall when the cold desert air condenses it into water from
where solar pumps take it to the fields. The nearby desert blooms
whenever the water comes so it is quite fertile really.
Eeyore - 22 Jan 2007 02:27 GMT
> correction

Indeed. You're an idiot.

Graham
jimp@specsol.spam.sux.com - 22 Jan 2007 03:25 GMT
In sci.physics habshi <hi@anony> wrote:
> correction
>         You have the salt water in the oceans , you have 4,000 MW of
[quoted text clipped - 6 lines]
> where solar pumps take it to the fields. The nearby desert blooms
> whenever the water comes so it is quite fertile really.

Add deserts to the list of things you babble on nonsensicaly about
with no knowledge.

Most deserts are quite infertile and have little top soil.

Those things that bloom in the desert have adpated to the desert
conditions.

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Dan Bloomquist - 22 Jan 2007 05:47 GMT
> In sci.physics habshi <hi@anony> wrote:
>
[quoted text clipped - 10 lines]
>
> Add deserts to the list of things you babble on nonsensicaly about..

Then, let him eat desserts.....
Gordon - 22 Jan 2007 15:02 GMT
>In sci.physics habshi <hi@anony> wrote:
>> correction
[quoted text clipped - 15 lines]
>Those things that bloom in the desert have adpated to the desert
>conditions.

Why, then, do they bother irrigating deserts and farming them,
when river water is available?
jimp@specsol.spam.sux.com - 22 Jan 2007 16:15 GMT
In sci.physics Gordon <gordonlr@deleteswbell.net> wrote:

> >In sci.physics habshi <hi@anony> wrote:
> >> correction
[quoted text clipped - 18 lines]
> Why, then, do they bother irrigating deserts and farming them,
> when river water is available?

Because those deserts have at least some top soil and you can bet
a lot of fertilizer is used.

The Coachella Valley in California is a good example, where, by the
way, until recent years the major crop was dates.

Contrary to habshi's breathless armwaving, it takes more than just
water to establish usefull agriculture in a desert.

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habshi - 22 Jan 2007 23:43 GMT
    >
Why, then, do they bother irrigating deserts and farming them,
when river water is available? <

    because desert sand is fine and free of weeds and plants get
throught them easily and so that is why it is so fertile.
    India has built the Indra Gandhi canal in Rajasthan which has
rendered fertile an area as big as the Nile in Egypt !
    We can do the same with ocean water , the 4000MW per sq mile
energy falling on it to convert it to fresh water .
    Imagine an area dug below sea level , a shallow one say six
feet deep. Salt water flows on to it . Then you cover it with a
transparent plastic bag with holes with one way valves. Water
evaporates through these holes into the bag on top and at night
condenses there to be lead off .
    A cheap way to turn salt water into fresh!!!
Bill Ward - 23 Jan 2007 00:35 GMT
>     >
> Why, then, do they bother irrigating deserts and farming them, when river
[quoted text clipped - 12 lines]
> lead off .
>     A cheap way to turn salt water into fresh!!!

You're slipping, habshi!  That basic idea actually works after a fashion.
You better drop it immediately or you'll damage your reputation.

http://en.wikipedia.org/wiki/Solar_still

Better luck next time.

Regards,

Bill Ward
jimp@specsol.spam.sux.com - 23 Jan 2007 00:55 GMT
In sci.physics habshi <hi@anony> wrote:
>         >
> Why, then, do they bother irrigating deserts and farming them,
> when river water is available? <

>         because desert sand is fine and free of weeds and plants get
> throught them easily and so that is why it is so fertile.

Fertile means there are nutrients required by plants in the soil.

Sand has nearly zero nutrients, irregation water would run right
through sand, and is the worst possible growing medium for most
agriculture.

You are an idiot.

<snip remaining idiocy>

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tj Frazir - 23 Jan 2007 03:50 GMT
dredge and pump is how sand is farmed .
dredge the sedements and put the water and the top soil on at the same
time.
T Wake - 23 Jan 2007 09:45 GMT
> <snip frazirbabble>

So TJ, am I right in thinking you are never going to answer my questions
because you don't have _any_ money and you have never met Roman Abramovich?
habshi - 24 Jan 2007 23:02 GMT
    Another splendid post by Ghost. I never realised that the
cooling water would release an energy equivalent to 4 Hiroshimas and
the immense amount of water that escapes from just 1 sq miles , a tank
261meters high , many many times the height of the statue of liberty

    So if we have a plastic bag with a partition in the lower half
which is punctured by one way holes , and allow some of the lower half
to be filled with salty ocean water , the water will evaporate into
the top half . At night the cold desert air will condense the water
which will fall to the roof of the bottom half which is of course at
an angle so the water collects near land side.It would give up the
heat to the desert air and to the water in the bottom half.
    The amount of fresh water collected is so huge that we may
need to scale down .
   
Ghost wrote
As the tank cools,
it has to liberate -- somehow -- 172.8 TJ of energy -- the
same amount of energy held by 41,300 tonnes of TNT!
.. or four Hiroshimas !

one can envision a tank 0.4 km^2
in area at its base and a height of about 261 m
If one allows 4000 MW or 4 GW of heat power to fall on the
surface or the desert or whatnot for 12 hours, one gets
48 GWh or 172.8 TJ.  Since water's heat of vaporization
is 2.260 MJ/kg, that translate into 76,460 metric tonnes
of water, or 4.2478 gigamoles (since a mole of water is
0.018 kg).

Since 4000 MW will require about 4000 m^2 or 0.4 km^2 or
0.4 hectares of area, one can envision a tank 0.4 km^2
in area at its base and a height of about 261 m.  For the
sake of comparison, the largest (not tallest) building in
the world is NASA's Vehicle Assembly Building, sited in
Florida; its dimensions are about 160 meters in height,
218 meters long, 158 meters wide.  That's 3.25 hectares,
so is squatter and bigger than our proposed tank -- but
not that much bigger, and it's not really a cube anyway,
more like several blocks juxtaposed.

Another building is the Empire State Building -- 381 m high.
It occupies a site of 83,860 square feet or 0.779 hectare,
but because it tapers it only holds 37 million cubic feet
or 0.001048 km^3.

So now we have a heated tank.  The "cool desert air", of
course, is an artifact of many things -- mostly because
the desert has a low specific heat.  As the tank cools,
it has to liberate -- somehow -- 172.8 TJ of energy -- the
same amount of energy held by 41,300 tonnes of TNT!
Eeyore - 24 Jan 2007 23:33 GMT
>         So if we have a plastic bag

We could place it over your head and asphyxiate you !

Graham
The Ghost In The Machine - 25 Jan 2007 02:58 GMT
In sci.physics, Eeyore
<rabbitsfriendsandrelations@hotmail.com>
wrote
on Wed, 24 Jan 2007 23:33:37 +0000
<45B7ECD1.86C57C8F@hotmail.com>:

>>         So if we have a plastic bag
>
> We could place it over your head and asphyxiate you !
>
> Graham

Depends on the size.  A bag 261m in height and 0.4 hectare
in area would take awhile to exhaust the O2. :-)

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tj Frazir - 25 Jan 2007 03:02 GMT
Pupet sock..
try acre-feet.
T Wake - 25 Jan 2007 19:30 GMT
> Pupet sock..
> try acre-feet.

Another brilliant bit of Frazir-non-sense. You really are insane. This was
in reply to news:45B7ECD1.86C57C8F@hotmail.com yet is almost complete
nonsense.

Amazing.
Morty McSnerd - 29 Apr 2007 14:57 GMT
> correction
> You have the salt water in the oceans , you have 4,000 MW of
[quoted text clipped - 6 lines]
> where solar pumps take it to the fields. The nearby desert blooms
> whenever the water comes so it is quite fertile really.

Why don't you become the scientist/engineer/inventor that's comes up with
this "contraption"? It's easy for you and 100's of millions of other
bubbleheads like you, to bob your technologically illiterate head back and
forth and think some one else should be able to do it.  Don't forget that
95% of United States populace, including most college graduates are
scientifically and technologically illiterate (Physics is SO hard!!).
Instead of being part of the problem, why not become a part of the solution?
Non scrivetemi - 29 Apr 2007 17:41 GMT
>> correction
>> You have the salt water in the oceans , you have 4,000 MW of
[quoted text clipped - 14 lines]
> scientifically and technologically illiterate (Physics is SO hard!!).
> Instead of being part of the problem, why not become a part of the solution?

This is old-style thinking. Steorn's Orbo will soon be supplying unlimited
power to allow for direct condensation of water from the moisture in the
air.
Morty McSnerd - 30 Apr 2007 16:16 GMT
>>> correction
>>> You have the salt water in the oceans , you have 4,000 MW of
[quoted text clipped - 20 lines]
> power to allow for direct condensation of water from the moisture in the
> air.

Uh-Huh...and how would you know?

Actually it's old style thinking to think that some how you can live in the
quite scientific-technologically-economically complex new milennium world we
lift and possess all the skills and knowledge of a liberal "arts" education
that is relevant only to the 18th century?
MathMagician - 22 Jan 2007 01:27 GMT
> You have the salt water in the oceans , you have 4,000 MW of
> energy pouring down on the desert next to it , this is about four
> times what Hoover dam supplies. Why cant scientists

Stop right there.
Why can't **** YOU**** do all this crazy sh.t you come
up with?
Eeyore - 22 Jan 2007 02:25 GMT
>  The nearby desert blooms whenever the water comes so it is quite fertile
> really.

Deserts have minimal fertility.

Graham
The Ghost In The Machine - 24 Jan 2007 07:36 GMT
In sci.physics, habshi
<hi@anony>
wrote
on Mon, 22 Jan 2007 01:05:52 GMT
<45b3feaf.1401171@news.clara.net>:
>     You have the salt water in the oceans , you have 4,000 MW of
> energy pouring down on the desert next to it , this is about four
> times what Hoover dam supplies.

http://www.usbr.gov/dataweb/html/bcphoover.html

states 2.074 gigawatts.  You're off by a factor of 2. :-)

> Why cant scientists make a contraption
> which can heat the salt water with this energy , it evaporates via a
> one way valve into the another pipe and a closed tank and stays there
> till nightfall when the cold desert air condenses it into water from
> where solar pumps take it to the fields. The nearby desert blooms
> whenever the water comes so it is quite fertile really.

And how big is the tank?

If one allows 4000 MW or 4 GW of heat power to fall on the
surface or the desert or whatnot for 12 hours, one gets
48 GWh or 172.8 TJ.  Since water's heat of vaporization
is 2.260 MJ/kg, that translate into 76,460 metric tonnes
of water, or 4.2478 gigamoles (since a mole of water is
0.018 kg).

P = 101325
V = solved for
n = 4.2478 gigamoles
R = 8.314472 J/(mol K)
T = 300 K or so

so V = nRT/P = 0.1045 km^3.

Since 4000 MW will require about 4000 m^2 or 0.4 km^2 or
0.4 hectares of area, one can envision a tank 0.4 km^2
in area at its base and a height of about 261 m.  For the
sake of comparison, the largest (not tallest) building in
the world is NASA's Vehicle Assembly Building, sited in
Florida; its dimensions are about 160 meters in height,
218 meters long, 158 meters wide.  That's 3.25 hectares,
so is squatter and bigger than our proposed tank -- but
not that much bigger, and it's not really a cube anyway,
more like several blocks juxtaposed.

Another building is the Empire State Building -- 381 m high.
It occupies a site of 83,860 square feet or 0.779 hectare,
but because it tapers it only holds 37 million cubic feet
or 0.001048 km^3.

So now we have a heated tank.  The "cool desert air", of
course, is an artifact of many things -- mostly because
the desert has a low specific heat.  As the tank cools,
it has to liberate -- somehow -- 172.8 TJ of energy -- the
same amount of energy held by 41,300 metric tonnes of TNT.

There are easier methods than "cool desert air" by
which one can cool that tank; the simplest is to use a
small pump to flow salt water through piping lining the
tank's surface, much like one might see in older model
Eichler houses (prior to the concrete pour) and ice rinks.
The salt water would be extracted from the deep sea and
expelled somewhere relatively harmless.  There are some
issues regarding sea water's corrosiveness -- not to
mention the definition of "relatively harmless".

There are also issues regarding the partial vacuum in
the tank.  In fact, I may be underestimating the size of
the tank because the vapor pressure of water at 300K is
not 101325 Pascal; it's more like 32 mm Hg or 4266 Pascal
-- making the tank almost 25 times as big and subjecting
it to a rather nasty pressure to boot, as the outside
air pushes on the sides.  Admitting air into the tank is
possible to compensate for the pressure but that air will
also have to be heated and cooled, reducing efficiency --
and in fact, the tank will be filled with almost 96% air,
given the figures I'm estimating.

The good news: one might cool a part of the vapor as one
heats the other part -- with a scheme similar to the one
I posted on some days back with two heat exchangers.

As for desert fertility -- others have already addressed that
subpoint, and it does not look promising.  I'll admit to some
curiosity as to how one can synthesize humus, but soil is a
complicated mixture.

This does not look like a practical scheme as written.

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jimp@specsol.spam.sux.com - 13 Jan 2007 16:55 GMT
In sci.physics Brablo <gestureofrespect@yahoo.com> wrote:
> The Alaska Pipelines were built in '68, and they're regarded as a
> value-added engineering marvel.  Every day they pump tons of oil, and
> they do so relatively efficiently.

> In the same region, there is a lot of freshwater.  Also, diametrically
> opposite of Alaska is the Antarctic region.  There are tons of
> freshwater here as well melting everyday, I would think.

> What are the possibilities of sending this water via pipelines to
> parched lands (with big populations and/or good soil)?  Another
[quoted text clipped - 6 lines]
> 2.  Caspian Sea to Israel/Palestine, where the soil is good, but the
> land is dry.

Projects such as this have been talked about for about a hundred
years now, mostly to refill the Dead Sea.

Recently some new agreements were reached by the countries involved,
but no dirt has moved.

> 3.  The melting mountain tops of Alaska to California, where the soil
> is great, and the population is high, but it's dry there.

Too far away and too many high mountains in between.

Besides, there is lots of water in Northern California, Oregon, and
Washington, it just isn't managed.

Besides, it is a lot cheaper to build things like the recently built
Diamond Lake that catches some of the enormous amount of rain that
otherwise just flows into the Pacific.

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habshi - 14 Jan 2007 02:04 GMT
    Of course the pipes would be covered to stop evaporation and
solar pumps at intervals .
    It would be a great way to tackle global warning , shipping
water to the deserts would let us grow trees there to soak up all the
co2. Remember we need carbon for our bodies.
The Ghost In The Machine - 14 Jan 2007 04:06 GMT
In sci.physics, habshi
<hi@anony>
wrote
on Sun, 14 Jan 2007 02:04:33 GMT
<45a98f25.3095656@news.clara.net>:
>     Of course the pipes would be covered to stop evaporation and
> solar pumps at intervals .
>     It would be a great way to tackle global warning , shipping
> water to the deserts would let us grow trees there to soak up all the
> co2. Remember we need carbon for our bodies.

Anyone else notice a certain disconnect in the last sentence?

Also, in order to use solar pumps -- I'm assuming you're
referring to photovoltaic-powered electrical motor units
connected to some sort of impeller assembly -- someone
has to manufacture the PV panels.  These are inherently
expensive (although they're better than they were,
pricewise -- but it's still over $4/W wholesale).

Since I don't know the height of the mountain you're
attempting to raise the water over, or the amount of
water you need per second, I'm not sure how much power
you'll need.

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jimp@specsol.spam.sux.com - 14 Jan 2007 05:05 GMT
In sci.physics The Ghost In The Machine <ewill@sirius.tg00suus7038.net> wrote:
> In sci.physics, habshi
> <hi@anony>
[quoted text clipped - 6 lines]
> > water to the deserts would let us grow trees there to soak up all the
> > co2. Remember we need carbon for our bodies.

> Anyone else notice a certain disconnect in the last sentence?

Not as bad as the first sentence.

Anyone ever hear of a "pipe" with an open top?

<snip>

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habshi - 14 Jan 2007 12:46 GMT
Remember we need carbon for our bodies.

Anyone else notice a certain disconnect in the last sentence?<

    Just meant we should not overdo the carbon renewal and find we
dont have enough to refurbish our bodies which mother nature is trying
to degrade everyday.
    Pipes are incredibly cheap to build and once built last for
ever. Say take the Alps water to the Spanish desert , will need
minimal solar pumping and could generate billions each year in crops.
Same in other parts of the world.
jimp@specsol.spam.sux.com - 14 Jan 2007 15:45 GMT
In sci.physics habshi <hi@anony> wrote:
>  Remember we need carbon for our bodies.

> Anyone else notice a certain disconnect in the last sentence?<

>         Just meant we should not overdo the carbon renewal and find we
> dont have enough to refurbish our bodies which mother nature is trying
> to degrade everyday.

Babbling nonsense.

>         Pipes are incredibly cheap to build and once built last for
> ever. Say take the Alps water to the Spanish desert , will need
> minimal solar pumping and could generate billions each year in crops.
> Same in other parts of the world.

Pipes are expensive to build, both for the structure and the right of
ways.

Pipes require constant maintenance. There have been two major water
pipe line shutdowns for maintenance in my area alone in the past year.

You haven't a clue.

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M. Ranjit Mathews - 14 Jan 2007 18:59 GMT
>     Pipes are incredibly cheap to build and once built last for
> ever.

It would cost $283 million to $752 million to build a pipeline to move
vast amounts of water across the Continental Divide from the Green
River to the North Platte River Basin, state water officials say. The
study looked at a 54-inch steel pipeline that would carry 50,000 acre
feet of water a year.
http://www.casperstartribune.net/articles/2005/06/17/news/wyoming/bad625de1dea28
e387257023000517f4.txt


That works out to a capital cost of $5500 to $15,000 per household to
supply 50,000 households, using a SHORT pipeline.

> Say take the Alps water to the Spanish desert , will need
> minimal solar pumping and could generate billions each year in crops.
> Same in other parts of the world.

At the above rate, it would cost over $100,000 to deliver water to each
household in a Spanish desert, which if amortized over 30 years, would
cost over $700 per month, not counting operating costs. Is that
incredibly cheap? Only if you're currently spending over 1000 quid per
month on your water. Are you spending that much?
The Ghost In The Machine - 14 Jan 2007 20:06 GMT
In sci.physics, M. Ranjit Mathews
<ranjit_mathews@yahoo.com>
wrote
on 14 Jan 2007 10:59:17 -0800
<1168801156.979465.315160@11g2000cwr.googlegroups.com>:

>>     Pipes are incredibly cheap to build and once built last for
>> ever.
[quoted text clipped - 18 lines]
> incredibly cheap? Only if you're currently spending over 1000 quid per
> month on your water. Are you spending that much?

Additional data, eh? :-)  From my previous post, $1B/year
worth of corn harvests will require 4.0558 km^3/year of
water (as a very gross estimate).  You are postulating here
a cost of $283M to ferry 50,000 acre-feet of water/year,
or 0.061674 km^3 of water/year, over a short pipeline.

This means that an irrigation pipeline to carry enough water
to irrigate $1B/year worth of crop will cost $18.6B, and
that's just for the pipeline, never mind pumps and water costs.

Hardly cheap.

If we take your second input the costs increase
from $18.6B to $18.6 * 100000 / 15000 = $124B, give or take.
That's almost 1/8th of Spain's GDP.

Thank you, Habshi, for demonstrating once again that
you have no concept of the real scale of your admittedly
inventive projects.  :-)

(Side issue: return on investment is apparently at
least 124 years, pending inclusion of such things as
bond interest rates and the aforementioned pumps, not
to mention such things as desalination plants; I'm not
hopeful about the Alps being able to supply the water.
Not horribly practical.)

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Sorcerer Androcles - 14 Jan 2007 21:13 GMT
> In sci.physics, M. Ranjit Mathews
> <ranjit_mathews@yahoo.com>
[quoted text clipped - 51 lines]
> hopeful about the Alps being able to supply the water.
> Not horribly practical.)

Hmm... "pipes" from the Alps are called...
err...
let me think...
err...
wait... it's coming...
err...
err...
err...
I've almost got it....
err...
rivers!
Yes, that's it.
I don't think they run from the Alps through France
over the Pyrenees to Spain, though, the Basque separatists
won't allow it.
hanson - 14 Jan 2007 23:50 GMT
>>> The Ghost In The Machine <ewill@sirius.tg00suus7038.net>
>>> Say take the Alps water to the Spanish desert , will need
>>> minimal solar pumping and could generate billions each
>>> year in crops.  Same in other parts of the world.

[Andro]
Hmm... "pipes" from the Alps are called...
err... let me think... err... wait... it's coming...
err... err... err... I've almost got it.... err... rivers!
Yes, that's it.  --- I don't think they run from the Alps
through France over over the Pyrenees to Spain,
though, the Basque separatists won't allow it.

[hanson]
ahahahaha.... of course not, but never mind the
Basques. The green sh.ts of CH, the Confederatio
Helvetica (Switzerland) will not be "neutral" on this...

So, here's a true story of real difficulties that arise with
such projects, even on a  comparatively minuscule scale.

For millennia, the Swiss "Sennen" ( = alpine cow boys
dressed in a short Afghan type tunic, knee high pants
and donning a Jewish Yarmulke, instead of a turban, and
blowing their  Alphorns) were yodeling, grazing and milking
their cows in the lush, high alpine meadows, 2-3000 meters
high up, 5-10 miles away from their village in the valleys
below.
So, they carried and marched their milk production daily
down to the consumers in huge 10-25 gallon metal back-pack
containers that looked like jumbo sized flat pocket Scotch
bottles. -- Tiresome, back braking, heaving hard work.

Enter the 20th century. Circa 1960 a splendid Cuckoo clock
inventor had the same idea that hashit has advocated here:
** Build a cheap plastic pipeline to bring the milk from
the high-up-there-udders, fast and easy to down into the
café's and to the cheese makers' facilities in the valley. **

With great fanfare & Yodel the first milk-run was announced.
Down in the valley they waited, ....and waited at the tap, ..
... a long time...  and opened the spigot wide.... Nothing came
out, despite flawless previous trial runs with water... ahahaha...

Then finally, slowly a trickle of pale greenish liquid dripped
out of the wide open spigot.... the whey, followed by masses
of half molten soft butter.... ahahahaha... The milk rushing
down hill got the same beating in the pipes, that the Swiss
used to make butter from the milk, the traditional way, by
beating/stirring it in a rotating hex-drum.
The problem was rectified by installing baffles every few feet.

I mention this so that habshi can promote the production
of "Ghee" in his lay of the lands where I had the pleasure
of enduring several stints in the parched lands of Bangalore,
the jungles of the Nilgiris mountains,Ootacamund, the green
slopes of Ghats and on the great, black Monazite beaches of
Kerala. -- habshi, I truly enjoyed your colorful culture. Was great,
despite the awful occasional amoeba attacks, which were
far worse than Montezuma's revenge in Meso America.
ahahaha... ahahahanson
Sorcerer Androcles - 15 Jan 2007 00:46 GMT
>>>> The Ghost In The Machine <ewill@sirius.tg00suus7038.net>
>>>> Say take the Alps water to the Spanish desert , will need
[quoted text clipped - 57 lines]
> far worse than Montezuma's revenge in Meso America.
> ahahaha... ahahahanson

So that's where the story of Little Muss Miffet came from...
When will these people ever learn that everything is free
until you pay someone to supply it, and then you pay taxes
to someone you vote for who decides it's bad for the
environment?
Fox-hunting is illegal in Britain, now the bastards stroll down
the railway lines (breaking the law, but foxes don't care) to
scavenge in the cities because they've eaten all the fuckin'
real sheep.

And did those feet in ancient time
Walk upon England's mountains green?
And was the ho-ole leg of lamb
On England's pleasant pastures seen?

And did the Countenance Divine
Shine forth upon our clouded hills?
And was Islamabad builded here
Among these dark satanic mills?

Bring me my bow of burning gold;
Bring me my arrows of desire;
Bring me my spear; O clouds, unfold!
Bring me my chariot of fire!

I will not cease from mental fight,
Nor shall my sword sleep in my hand,
Till we have built Islamabad
In England's green and pleasant land. - Billy Blake.

   This royal throne of kings, this scepter'd isle,
   This earth of majesty, this seat of Mars,
   This other Eden, demi-paradise,
   This fortress built by Nature for herself
   Against infection and the hand of war,
   This happy breed of men, this little world,
   This precious stone set in the silver sea,
   Which serves it in the office of a wall,
   Or as a moat defensive to a house,
   Against the envy of less happier lands,
   This blessed plot, this earth, this realm, this England,
   This nurse, this teeming womb of royal kings,
   Fear'd by their breed and famous by their birth,
   Renowned for their deeds as far from home,
   For Christian service and true chivalry,
   As is the sepulchre in stubborn Jewry,
   Of the world's ransom, blessed Mary's Son,
   This land of such dear souls, this dear dear land,
   Dear for her reputation through the world,
   Is now leased out, I die pronouncing it,
   Like to a tenement or pelting farm:
   England, bound in with the triumphant sea
   Whose rocky shore beats back the envious siege
   Of watery Neptune, is now bound in with shame,
   With inky blots and rotten parchment bonds:
   That England, that was wont to conquer others,
   Hath made a shameful conquest of itself.
   Ah, would the scandal vanish with my life,
   How happy then were my ensuing death!

John of Gaunt.
(Richard II, Shakespeare)
habshi - 15 Jan 2007 00:55 GMT
    You dont have to carry these pipes 'over' mountains , you can
dig a tunnel through them
Eeyore - 15 Jan 2007 01:15 GMT
>         You dont have to carry these pipes 'over' mountains , you can
> dig a tunnel through them

No. *YOU* can dig a tunnel through them you utter moron.

Tunnel my arse / a.s !

Graham
The Ghost In The Machine - 15 Jan 2007 04:44 GMT
In sci.physics, habshi
<hi@anony>
wrote
on Mon, 15 Jan 2007 00:55:22 GMT
<45aad0dd.1949140@news.clara.net>:
>     You dont have to carry these pipes 'over' mountains , you can
> dig a tunnel through them

Do you have an idea how expensive it is to tunnel through
solid rock?  That's assuming it *is* solid rock; real
tunnel engineering has to worry about strata in the tunnel.
No doubt you've seen pictures of the US Grand Canyon,
with the sedimentary layers in beautiful colors; it
is naive to think such layering is only above ground,
especially since we now know that said layering is done
over millions of years.

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Sorcerer Androcles - 15 Jan 2007 05:47 GMT
> You dont have to carry these pipes 'over' mountains , you can
> dig a tunnel through them

Go on then, start digging, fuckhead.
The Ghost In The Machine - 14 Jan 2007 19:55 GMT
In sci.physics, habshi
<hi@anony>
wrote
on Sun, 14 Jan 2007 12:46:26 GMT
<45aa259d.5820062@news.clara.net>:
>  Remember we need carbon for our bodies.
>
[quoted text clipped - 3 lines]
> dont have enough to refurbish our bodies which mother nature is trying
> to degrade everyday.

I don't think that will be a major problem, somehow. :-)

>     Pipes are incredibly cheap to build and once built last for
> ever. Say take the Alps water to the Spanish desert , will need
> minimal solar pumping and could generate billions each year in crops.
> Same in other parts of the world.

Well, that gives me something as to how much is required.  Lessee.

First, how much is $1B/year in crops?  Grain market coughs
up Chicago Board of Trade, which is probably a good start
as any.  However, a better data set might be

http://econ.sdstate.edu/Extension/corn.htm

(since it's free :-) ).  It turns out one is feeding
the other.  Corn futures are trading at 396 (March), which
tells me very little until I figure out what the units are.
Judging from other futures markets I hold little hope that
they're metric.

It turns out some CBOT data is free after all; Google coughed
up the following link:

http://www.cbot.com/cbot/pub/page/0,3181,1213,00.html

and it turns out the trading unit is 5,000 bushels, with
the price quoted at cents per bushel.  In other words, that
396 is $3.96 per bushel of corn, with delivery in March,
minimum size 5,000 bushels -- or 176.2 m^3.  Not sure
that'll fit in my condo all that well.

(BTW, the futures are increasing rapidly for some reason;
back in Jan 5 the March futures were only $3.68/bushel.)

So now I have -- conceptually -- a bushel of corn,
worth $3.96.  How much land and water is needed to grow
that bushel?

(It turns out there are other issues, such as fertilization.
Not surprising, really.  For now, I'll concentrate on
water delivery.)

http://www.ers.usda.gov/Publications/AIB774/

contains some very interesting data -- among them
estimated crop yield in bushels per planted acre (this is
region-dependent but runs about 128 bushels/year/acre for
the entire US).  However, the amount of water falling on
the field is not clear.

http://www.epa.gov/oecaagct/ag101/cropirrigation.html

does mention some specifics as to the total amount of
rainwater, depending on area; the figure suggests 20-22
acre-inches of water for that acre of corn.  (Since an
acre-foot is a well-known unit of volume, this works very
well for me; 1 acre-foot = 1233.5 m^3.)

I'll use 20 acre-inches or 2055.8 m^3 per year per acre of
water delivery.  Since we need $1B of product per year,
we'll need 1 * 10^9 / (3.96 * 128) = 1972900.0 acres (or
7984 km^2) to grow it on, and 4.0558 * 10^9 m^3 of water
(or 4.0558 km^3) per year.

A Google on "spanish desert" coughed up some interesting
recipies.  Apparently "spanish deSSert" is a flan-based affair
with sprinkled peanuts; sounds rather tasty but not all
that relevant (especially since it's made with eggs and
milk, not corn).  Ah, the distractions of the Web...

Of course, one can always go to either Wikipedia or the World Factbook:

https://www.cia.gov/cia/publications/factbook/geos/sp.html#Geo

which among other things is suggesting that Spain is
already irrigating 37800 km^2 of land, so they're way
ahead of you as it turns out.

https://www.cia.gov/cia/publications/factbook/geos/sp.html#Econ

states agriculture is 4% of Spain's GDP, which is $1.033
trillion total; this means Spanish agriculture is worth
about $41.3B.  Assuming all of that is from corn (which
is unlikely) and that Spanish corn yields are similar
to those in the US (ditto), that translates into
329700 km^2 of corn cropland.  This is way more than
available, since Spain's total land is only 499542 km^2, of
which arable land is 27.18% or 135776 km^2.  (Since corn
is an annual this is the proper category.)

But it's in the ballpark, and should give you an idea of
the scope of the problem.

An interesting subissue is how
many kcal/bushel.  Regrettably,
http://www.kallipolis.com/diet/food.php?id=11168&w=3
gives a serving size of one ear,
which doesn't do me a lot of good.
http://nutrition.about.com/od/fruitsandvegetables/p/sweetcorn.htm
does give me a volume measurement -- 68.36 g of water
is of course 68.36 cm^3.  However, it's not clear to me
whether that original bushel in the corn contract includes
shucking or not.  I suspect that it does; kernels are
easier to handle presumably.

So therefore, theoretically, 1 bushel of corn will have
515.49 * 77 kcal = 39,700 kcal, give or take (there's
a number of issues here, not the least of how fast the
corn grew).

Disclaimer: Usenet is a big paper napkin.  :-)

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Eeyore - 14 Jan 2007 20:25 GMT
>         Pipes are incredibly cheap to build and once built last for ever.

LMFAO !

I'll bet Thames Water wishes that were true.

The crisis is that underground pipes, particularly those belonging to Thames
Water, are in many cases over 100 years old and leak like sieves.
http://www.thisismoney.co.uk/news/article.html?in_article_id=402328&in_page_id=2

Graham
BioFreak - 15 Jan 2007 22:53 GMT
> 2.  Caspian Sea to Israel/Palestine, where the soil is good, but the
> land is dry.

Caspian is not freshwater.

Also, Caspian isn't located the way you want. It is
located the way Iranians want.

--
Gordon - 17 Jan 2007 00:32 GMT
>The Alaska Pipelines were built in '68, and they're regarded as a
>value-added engineering marvel.  Every day they pump tons of oil, and
[quoted text clipped - 16 lines]
>3.  The melting mountain tops of Alaska to California, where the soil
>is great, and the population is high, but it's dry there.

Another approach that might work better and be cheaper to
implement could be to pump seawater through a horizontal flume
equipped with graphite ropes which are moving across the flume,
orthogonal to the water flow.

Set these graphite ropes up in pairs and charge them  as
electrodes. The electrode charge will attract sodium and chlorine
ions to the appropriately charged rope/electrode. These ropes
laden with saline ions will then pass through orifices along the
side of the flume, then pass over some graphite support
structures that short the electrode paired ropes, deleting their
charge.

The attached saline ions would then be released into a discharge
tank or flume and returned to the ocean. The water in the primary
flume would get progressively less saline as it flows past a
large number of these charged graphite rope electrode pairs.

The linear resistance of the graphite ropes should permit
charging a portion of the rope pairs while shorting another
portion and killing the charge. The charge voltage would have to
be less than the breakdown potential of water.  Gordon
jimp@specsol.spam.sux.com - 17 Jan 2007 01:55 GMT
In sci.physics Gordon <gordonlr@deleteswbell.net> wrote:

> >The Alaska Pipelines were built in '68, and they're regarded as a
> >value-added engineering marvel.  Every day they pump tons of oil, and
[quoted text clipped - 21 lines]
> equipped with graphite ropes which are moving across the flume,
> orthogonal to the water flow.

> Set these graphite ropes up in pairs and charge them  as
> electrodes. The electrode charge will attract sodium and chlorine
[quoted text clipped - 3 lines]
> structures that short the electrode paired ropes, deleting their
> charge.

> The attached saline ions would then be released into a discharge
> tank or flume and returned to the ocean. The water in the primary
> flume would get progressively less saline as it flows past a
> large number of these charged graphite rope electrode pairs.

> The linear resistance of the graphite ropes should permit
> charging a portion of the rope pairs while shorting another
> portion and killing the charge. The charge voltage would have to
> be less than the breakdown potential of water.  Gordon

If you somehow were actually able to disassociate the sodium chloride
into sodium and chlorine, the sodium would immediately become sodium
hydroxide while chlorine bubbled off the other end.

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Gordon - 17 Jan 2007 02:22 GMT
>In sci.physics Gordon <gordonlr@deleteswbell.net> wrote:

[snip]
>> Another approach that might work better and be cheaper to
>> implement could be to pump seawater through a horizontal flume
[quoted text clipped - 22 lines]
>into sodium and chlorine, the sodium would immediately become sodium
>hydroxide while chlorine bubbled off the other end.

In an H2O solution, sodium and chlorine are normally dissociated
into free ions. These saline ions won't react with the H2O unless
the H2O is electrolyzed into free hydrogen and oxygen. This
requires something in excess of about 1.25 volts. Keep the
electrode potential below this level and there should be no
problem.

The saline ions are the means by which saline solutions exhibit
electrical conductivity. These ions are drawn by their charges to
the electrode of opposite charge, and will cling to the electrode
in the Stern and Guoy diffuse layers. It seems this "clinging"
could be used to drag the ions out of the solution, sort of like
leading the goats out of the sheep pen.  Gordon
tj Frazir - 20 Jan 2007 00:18 GMT
Plasic underwater pipes from 1 mountain river  uner the sea to a sea
level exit 2000 miles away is worth it on a giant scale big time but
worthless on a small scale .
Jeff…Relf - 20 Jan 2007 07:00 GMT
Hi  T.J.,  You wrote something like:

 Plasic underwater pipes from 1 mountain river passing under the sea
 to a sea-level exit 2,000 miles away is worth it on a giant scale, big time;
 but worthless on a small scale.

You say your Sliding_Vane_Rotor ( in an otherwise ordinary vehicle )
could travel from, say, Seattle to Key West Florida on one tank of gasoline.
Wouldn't that be valuable on a small scale ?

How is it that, here on the Internet,
you're the only one who's claimed to have done anthing like that ?
The Ghost In The Machine - 20 Jan 2007 21:16 GMT
In sci.physics, Jeff?Relf
<Jeff_Relf@Yahoo.COM>
wrote
on 20 Jan 2007 07:00:04 GMT
<Jeff_Relf_2007_Jan_19_1_@Cotse.NET>:
> Hi  T.J.,  You wrote something like:
>
[quoted text clipped - 5 lines]
> could travel from, say, Seattle to Key West Florida on one tank of gasoline.
> Wouldn't that be valuable on a small scale ?

Interstate truckers would love him. :-)  However, assuming
5600 km and 10 km/liter (or 23.5 mpg), one would have to
carry around a 560-liter tank -- at least.

> How is it that, here on the Internet,
> you're the only one who's claimed to have done anthing like that ?

Is he?  There was one character who claimed to have developed a faster
than light radio.

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tj Frazir - 21 Jan 2007 06:41 GMT
no ftl bullshit ghost you lost soul.

24 inch slidingvane motor 3 inch wide .
10 % of a doble steam boiler.
1200 cubic inch at 650 psi per second.
at 277 HP its 250 MPG . at 71 hp its 423mpg.
71 hp is 3.4 gal day 423 mpg
142 hp is 205 mpg
Thats off the shelf doble steamer boiler that ran a 400 cid engine runs
4 inch of vane  1100 hp.

1 square inch at 650 psi is 71 hp 650 foot pounds T.
 2 square inch is 1300 foot pounds at 500 rpm is 1200 cubic inch per
sec.
The 400 cid steam engine uses 13333 cubic inch steam per sec.
You 350 v8 uses 12000 per sec. cunic inch of power stroke .
 The sliding vane I biiuld has little friction and will go 1 million
miles.
 No transmision ,
dont nead one .  the rotor is on the end of the drive shaft joint.   its
on top of the rear end.
I keep a clean pair of shoes where the engine would be if I was stupid
like you.
 No hood.
No radiator .
The car has up to 1500 hp at slow speeds.
2600 foot pounds from a dead stop.
in my 1910 silver Ghost  6 door 2 windshield custom.

on the news ..
HA HA  soap factory on hill on fire lexiton.
  fire fighters fought all night.
  In the morning light the town down the hill was ,,,,,,foamed over..
10,000 tons of soap and 20 fire hoses for 4 hours ...hummm and a
waterfall dam in town just 10 feet..
thats on around the world in 60,,
you cant see the town ..china
The Ghost In The Machine - 22 Jan 2007 01:40 GMT
In sci.physics, tj Frazir
<GravityPhysics@webtv.net>
wrote
on Sun, 21 Jan 2007 01:41:22 -0500
<8664-45B30B12-72@storefull-3216.bay.webtv.net>:
> no ftl bullshit ghost you lost soul.

Well, that's probably an improvement over losing other things.
Like my mind.

>  
>  24 inch slidingvane motor 3 inch wide .
[quoted text clipped - 5 lines]
> Thats off the shelf doble steamer boiler that ran a 400 cid engine runs
> 4 inch of vane  1100 hp.

OK, so you've gotten venture capital and started manufacturing liquid
piston steam engines, right?

[rest snipped]

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Jeff…Relf - 22 Jan 2007 05:55 GMT
Hi  Ghost_In_The_Machine,  T.J. dumped the Liquid Piston idea.

Now there's just a " flash boiler " ( for relatively quick cold-starts ),
super-heated steam pushing against the variable suface area of a sliding vane,
...in a rotor 24 inches in diameter and and 3 inches tall. In his Silver Ghost,
this rotor is attached directly to the top of the rear axle.  See:

 http://WikiPedia.ORG/wiki/Doble_Steam_Car

He didn't say if anyone drove it 3,500 miles
without refuling it's 20 gallon tank... and I don't know much about it.

T.J. wants to stick it to Big Oil,
and Dobles can burn anything, including wood or coal.
tj Frazir - 22 Jan 2007 21:10 GMT
100 million of them.
Ghost is too retarted to do the math on a sliding vane rotor.
  400 cid steam engine uses 13000 cubc inch per second.
But a sliding vane rotor 2 inch vane at 650 psi is 1300 foot pounds and
uses 1200 cubic inch per sec .

Thats 10 % dumbass .
and a V8 350 cid is 12000 cubc inch second.
It has less then 200 foot pounds tourk.

1200 cubic inch per sec at 1300 foot pounds  is 10 % the fuel and much
more power .
There is no way a V8 can compete with a svr.

A 71 hp outboard motor on 3.4 gal per 24 hours  is an oil well stopper.

10 % the fuel is the end of green house and the oil age and the rag
heads.

200 billion more for me :)
T Wake - 23 Jan 2007 00:04 GMT
> <snip gibberish>

You still no nothing about physics or mathematics.

Why didn't you give Jeff the boat you promised him you cheapskate.

Speak to your friend Roman and ask him what company turned up for the
meeting about his risk management options - and who the representatives of
that company were.

Bet you can't get an answer.
The Ghost In The Machine - 24 Jan 2007 07:48 GMT
In sci.physics, tj Frazir
<GravityPhysics@webtv.net>
wrote
on Mon, 22 Jan 2007 16:10:44 -0500
<10429-45B52854-148@storefull-3213.bay.webtv.net>:
> 100 million of them.

Sales of 100 million motors at $1000/motor would result in
a gross revenue of more than $100B.  Even if one assumes
20 years manufacture of all of these motors that's still
more than $5B / year.

That's a little smaller than Black & Decker ($6.57B) -- but not much.

> Ghost is too retarted to do the math on a sliding vane rotor.
>    400 cid steam engine uses 13000 cubc inch per second.
[quoted text clipped - 8 lines]
> more power .
>  There is no way a V8 can compete with a svr.

Then why are we still using V8s to power cars, rather than steam powered
sliding vane liquid piston affairs?

Perhap