🚀 go-pugleaf

"Jo Schaper" <jospamnotschaper34@5socket78dot9net> wrote in message 
news:12pftnof8ae1jaa@corp.supernews.com...
> Peter Webb wrote:
>> "Addinall" <addinall@addinall.org> wrote in message 
>> news:1167544085.362178.229360@42g2000cwt.googlegroups.com...
>>> Landy wrote:
>>>> "David Moss" <q0320811@mail.connect.usq.edu.au> wrote in message
>>>> news:MPG.2000942a106031ce98a258@news.bigpond.com...
>>>>> In article <en4jub$rl8$1@news-02.connect.com.au>, dontemailme@all.com
>>>>> writes...
>>>>>
>>>>>> So tell me what's wrong with this form of energy as an alternative to
>>>>>> coal?
>>>>> Isn't geothermal just another kind of nuclear energy?
>>>>>
>>>> Well yes, but one is nuclear fission and the other is not.
>>> Nope. Both fission.  Exactly the same process the Green
>>> nuts get all pantieless over.  What's more, it's not
>>> contained.
>>>
>>> Environmental Pollution in Sindh, Pakistan
>>> By Mrs. Farzana Panhwar
>>> September 2004
>>>
>>> [...]
>>>
>>> Mass awareness and education program.
>>> Pollution- the contamination of air, water or soil with substance
>>> harmful to life -has been a seemingly inevitable by-product of
>>> industrialisation and urbanisation, should be reduced.
>>> Geothermal power brings thermal pollution of air and surface water,
>>> contamination ground water, increase, hydrogen sulphide and sulphuric
>>> oxide pollutants in the air, create problems in the disposal of salts.
>>> These carefully monitored and their pollutants should be controlled and
>>> checked at an International Standard to bring sustainable activities in
>>> the country.
>>> http://www.eco-web.com/editorial/040924.html
>>>
>>> [...]
>>> ------------
>>>
>>> Of course if you pump a load of water down a hole that
>>> is being heated by a load of radioactive rock, some of that
>>> radioactive material will be dissolved or kept in supension
>>> in the water, and it's going to come up to the surface.
>>>
>>> It WILL also find it's way into the water table and aquifiers.
>>> Water is the slipperiest molecule in the universe.  It
>>> will get everywhere once pumped into fissured
>>> rock.
>>>
>>> This is a big scream for the "NO NUKE" crowd, if something
>>> weally bad hapens, like tewwowists or a WEALLY big earthquake,
>>> you could leak nasty stuff into the WATER TABLE killing
>>> all the chilrun for at least 200,000 years.  So THERE.....!
>>>
>>> Sorry to tell you kiddies, injection driven geothermal power generation
>>> does that from day one, week one.
>>>
>>> In a country like Australia, devising a scheme to take huge
>>> quantities of fresh water and polluting it to generate electricity
>>> is criminal.  And insane.
>>>
>>> On the other hand, a closed fuel cycle reactor, metal cooled,
>>> will sit there and chug along producing not only power,
>>> but nice clean drinking water as well.
>>>
>>> Here we go.  A few dozen of these little babies
>>> all around the coast.
>>>
>>> http://www.llnl.gov/str/JulAug04/Smith.html
>>>
>>> Plug-n-Play Power.
>>>
>>> Mark Addinall.
>>>
>>>
>>>> cheers
>>>> Bill
>>
>> That's not my understanding of geothermal energy (though I may be wrong).
>>
>> Pump salt water down one hole, and tap it as steam out the other hole. 
>> The salt is left behind; fresh water is the waste product. Because heat 
>> exchange (Carnot cycle) engines are so inefficient at comparatively low 
>> temperatures (a few hundred degrees C), you actually get a lot of fresh 
>> water produced for each kWh you produce. When the "mining" is completed, 
>> you have a huge amount of salt from the sea buried deep underground and 
>> the other waste product - fresh water - available for consumption.
>
> And when the underground area is clogged with salt, and you then salinify 
> the aquifer?

Umm ... don't bury it where there is an underground aquafer, which 
considering we are talking about somewhere several kms undergound, means 
practically the whole of Australia?

(Incidentally, if there was an underground aquafer, you could directly tap 
into that for steam. Its because we don't have deep aquafers that we need 
hot rocks at all, otherwise it would just be natural geothermal power).