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Associate

Join Date: Nov 2006
Location: South Africa
Posts: 49

Energy Storage Possibilities: Open Discussion

07/06/2007 7:39 AM

Hi All

Being one of the 'save the earth' guys, I follow developments in renewable energy sources with great interest. As far as power generation is concerned, i feel that there is no reason not to adopt solar, wind, or marine current turbines for all our future power needs. However, Here in South Africa, politicians embrace nuclear power as the solution to future energy requirements, with the new Pebble Bed (what a cosy wording! ) reactor hailed as inherently safe. What the censored media fails to talk about is : where we intend to dump the nuclear waste.

Anyhow, one argument i can not fail the nuke-lobby on is that solar and wind are not consistent and require a backup for calm or cloudy days - a definitive advantage for the ever-radiant uranium..

Unless all possibilities of power storage are explored and developed, which is the key to broadbased use of solar power in all its forms (wind, waves, currents, direct sunlight ).

Pumped storage schemes, flywheel storage, nothing has as yet shown much viable impact.

This discussion is there to think-tank all options, bring up weird and wonderful ideas and concepts, get the people involved who can actually calculate the viability of generation/storage systems versus the dreaded nuke which we conveniently pass on to future generations to deal with later. (sorry , kids you can't cultivate the desert because we dumped some radioactive waste here - try again in 350 years )

I hear of crystalisation of sodium-sulphate solutions like in heat packs, some clay pebble system to store heat without great losses, decentralized systems to serve rural communities or even single households-employing organic rankine cycle generators, etc.

Please add your comments and suggestions, links, show actual projects, etc.

Thanks

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
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#1

Re: energy storage

07/06/2007 7:46 AM

http://www.snowdonia-active.com/news.asp?newsid=445

http://www.fhc.co.uk/dinorwig.htm

This one gets a vote. Old-tech now, perhaps, though not widely copied anywhere else, knowingly?

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Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#2
In reply to #1

Re: energy storage

07/09/2007 4:06 AM

Very informative. Many thanks.

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Associate

Join Date: Nov 2006
Location: South Africa
Posts: 49
#3

Re: Energy Storage Possibilities: Open Discussion

07/09/2007 6:04 AM

Some american students won an award for designing simple solar powered gensets, powering single houses utilizing automotive power steering pumps and other off-the-shelf materials. Maybe someone can find more info on this. 'Bethel business & community centre' in Lesotho is as far as i got. Please search on. Would be nice to get into contact with those people.

Sure a similar technology can be used to store and recover energy in the form of heat in a liquid medium. Who can calculate the efficiency of such systems ?

If it is viable to pump damwater for pumped storage schemes, then maybe this is not so far off anyway. Heat for hot water and heating could be tapped off such a system directly, a rankine cycle motor driving a generator could do the job of converting the stored heat back into electricity.

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