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- Xref: sparky sci.energy:5440 sci.environment:12741 talk.environment:4613
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- From: dpeders1@cc.swarthmore.edu (Daniel Pedersen)
- Subject: Re: Request: info on desalination and solar energy
- Message-ID: <X17SBR95@cc.swarthmore.edu>
- Sender: Daniel Pedersen - Keren's Daddy
- Nntp-Posting-Host: hemlock
- Reply-To: dpeders1@cc.swarthmore.edu (Daniel Pedersen)
- Organization: Swarthmore College
- References: <0X5SB3MH@cc.swarthmore.edu> <BxoxI6.Jqv@news.cso.uiuc.edu>
- Date: Sun, 15 Nov 1992 15:44:32 GMT
- Lines: 37
-
- lnosek@ux4.cso.uiuc.edu (Luke Nosek) writes:
- >
- > Yikes! are you sure that it would be feasable to desalinate water
- > with solar energy? I heard that they are making desalination plants in the
- > middle east now - and the reason that they can afford it is because oil is
- > dirt cheap over there - IT TAKES A LOT OF ENERGY TO REMOVE THE SALT FROM
- > SEAWATER - more than the sun could provide unless there were some sort of
- > technological miracle in solar energy.
-
- Actually, you remove the water from the sea-water. You've probably done
- this yourself - take the saltwater, boil it, condense the vapor and - BAM -
- pure H2O. All you're left with is the salt sediment in the seawater tank.
-
- So all you would need is to raise the seawater temperature above 100 C,
- which is well within the range of currently available, mass produced thermal
- solar collectors. You're right, it does take a lot of energy, but then
- again the sun puts out a lot of energy. The limiting factor is the
- temperature needed: If your collector could only achieve 60 C (like some
- hot air based solar collectors) then you couldn't boil the water.
-
- The reason that the Gulf countries are using desalination is because it is
- the most economically and politically viable method. They have mega-bucks
- and lots of "free" energy in the form of oil, no fresh water sources to tap
- and the Gulf full of seawater right on their shores. It would be to much
- bother to bring water from, say, Turkey, or an iceberg from the antarctic,
- compared to desalination.
-
- So, how about it? Anyone out there with sources/information for me about
- desalination?
-
- -->Daniel Pedersen - Keren's Daddy (215)543-8961
- dpeders1@cc.swarthmore.edu pedersen@engin.swarthmore.edu
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