> Think big :-).

Recommend perusal of Freeman Dyson's approach ...

On 4/2/08, Apptech <apptech@paradise.net.nz> wrote:
> Want to build / buy a 30 TerraWatt hour annually 'system'
> covering an all up 800 km x 800 km land area - read on.
>
> __________________
>
> Floating Solar Chimney
> Click "next" at top right of image for 30 or so image
> presentation.
>
>         http://www.floatingsolarchimney.gr/description1.htm
>
> PDF version
>
>         http://www.floatingsolarchimney.gr/papers/description.pdf
>
> Claims capital costs per kW of below or well below any
> alternatives.
> 10% of photovoltaics cost in 2005.
>
> Solar powered but suggests plausible night time operation
> methods at reduced levels.
>
> Claims mature high volume systems could produce Hydrogen at
> 1.5c/kg [!!!!].
>
> Basic principle demonstrated in Spanish pilot scale plant
> over some years BUT this variant uses a literally floating
> chimney.
> A 1 to 3 km high 70 to 100 meter diameter chimney surrounded
> by a 3 to 6 km^2 collector would be an impressive sight, at
> least.
>
> Efficiency depends on chimney height but in the 3%-5% range.
> Lower than many alternatives - which is accounted for in
> cost calculations.
>
> Construction at a land area per year of 20,000 square
> kilometres is suggested (!)
> 30 year target at 330GW/yr added capacity suggested as
> 600,000 km^2 land use giving 30 TerraWatt.hour energy
> annually - about 6x US usage from memory.
>
> Think big :-).
>
>
>
>
>
>
>
>
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