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One Gold Star
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Lucibee.
Steve_M.

'When I were a lad', I was told that a good concrete mix took 100 years to harden, then another 100 years to decay to powder and sand. That gives a good concrete mix a life span of 200 years. Given another 200 years for water to act on steel and lead, what happens to the 'waste' when it's encased in lead oxide, rust, powder and sand?

I guess the locals will dig it up after 1000 years just to find out what it is that causes the big worms in the area to glow at night. Seriously though, isn't it safer to take it underground where an H-bomb test is being made and seal it in vitrified rock (like the French seem to have done)?

Best regards, suricat.
 
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Picture of mufcdiver
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quote:
Yes muf. I mentioned it on page one, Wink but I couldn't post this earlier because of the server problems on the site.

Please accept my apologies suricat,I did read that post but the importance of what you were suggesting escaped me.by the time I heard the suggestion of producing hydrogen instead of electricity from offshore wind turbines to increase efficiency on mondays R4 PM show I'd forgotten you mention Frown
 
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muf.
No worries!
 
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mufcdiver.

What's more to the point, did they mention anything else of interest? I didn't get to hear it.

Best regards, suricat.
 
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quote:
What's more to the point, did they mention anything else of interest? I didn't get to hear it.

Ill try to find it on listen again Smile
 
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suricat
hydrogen was mentioned on home planet on Tuesday 17 mins in.
it was a listeners response to last weeks show stating that that it would be more efficient to use offshore wind farms to produce hydrogen from the sea and transport that onshore rather than use them to directly produce electricity
sounds interesting
 
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mufcdiver.

Yes, it's interesting because it takes away the erratic power generation capability of offshore wind from the electricity grid's inability to cope with it, though hydrogen isn't without its problems. The main one being storage. You can't just 'compress' it into a tank because it'll probably leak away unless the tank is made from 'special' materials, but that doesn't mean that there isn't an affordable system that can be made to work safely.

Depending upon whether you want to use the hydrogen as a 'backup electricity supply' for the grid, or use it as a 'mobile power source' determines what is done with it after it is piped ashore (preferably under 'light vacuum' conditions to minimise losses).

Were any of these criteria mentioned? Smile

Best regards, suricat.
 
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Were any of these criteria mentioned?

None were mentioned but the more I read the more I like the idea( link) Its got some nice by-products too, one of which is pure drinking water.
 
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mufcdiver.

quote:

Its got some nice by-products too, one of which is pure drinking water.

Well I wouldn't like to drink that water! Not unless it was 'doctored' with something beforehand. The water produced by hydrogen combustion is so pure that it won't even conduct electricity, but it isn't long before it does because it dissolves anything that will possibly form a solution with it (including rocks, steel and CO2). I prefer my water with a balanced variety of minerals in it. Especially C2-H5-O-H. Wink

I notice your reference suggested harvesting the oxygen as well. To do this would make the process ecologically 'dirty'. If you harvest H2 and O2 from water, then burn the H2 and use the O2 for some other process the result is atmospheric O2 consumption (depending on the application for the harvested O2).

Harvest H2 for combustion and liberate the O2 into the atmosphere and all is well. Harvest both and use the O2 to form another product and the combustion of the H2 just removes 'other' O2 from the atmosphere causing greater stress to current atmospheric forcings. You can't have your cake and eat it! Thus, to include 'all' the processes from this reference is effectively 'ecologically unsound'.

When it is claimed that "The project is economically acceptable in power niche market and has good prospects of being competitive both commercially and ecologically" , the full commercial potential berates the ecological aspect. I just hope they don't go for the full on 'commercial profits' version. The ecological version is sound though.

Best regards, suricat.

PS. I just hit another 'bad patch' with the servers here.
 
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Brill !,

Today's BBC shows how wind turbines are installed. "ships on legs" 30 jan 2008

BTW that Daily Telegraph article when the chap said you could only install them 3 months of the year he had a point when you do the tricky bits.

But your weather window is bigger for all the other bog standard type offshore structures.


Have a gander.

http://news.bbc.co.uk/1/hi/magazine/7206780.stm
 
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Two Gold Stars
Picture of madkitten 25
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Good its clean


I used to have an open mind ..but my brains kept falling out
 
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Picture of mufcdiver
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Good its clean

Don't leave it there MAD, enlighten us to this NEW, CLEAN!!![way] of building wind turbines Wink


Smile
 
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Am I good or am I good? The news as it happens! (well - 26/3/08)


QUOTE
The new turbines extract three to four times more energy from the wind, and so can be much smaller.
UNQUOTE

'course there's something called the Betz limit which means you can only extract a maximum of 59% of the KE of the wind.

All I need now are some hard numbers for this new gizmo.

Signing off - realprimate

Searching on your behalf...
 
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Offshore wind farms Good or Bad?

Not as cheap to build or maintain as onshore wind farms. As for the Isle-of-Lewis thumbs down - shame!

Trust the Germans though:-

http://www.time.com/time/specials/2007/article/0,28804,...4222_1734213,00.html
 
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