Dal Wheeler wrote:
>
> If its so "trivial" one would think there would be a good many more solar
> farms out there.  Same goes for wind farms.  People have been working on
> these for a long time; why isn't there a more resonable return on investment
> yet if it can be done so easily?

I've just been hearing about an Aussie invention that claims to be able
to harness 'wind' for power generation.

The idea is to have a somewhat large diameter pipe with a turbine in it.

The pipe is long enough so that when erected into a vertical position,
the temperature difference between the top and bottom causes an airflow
up the pipe. This turns the turbine and produces power.

It sounds far fetched but I believe some form of development is actually
taking place. I'm sure I didn't read about it on April fools day :-)

regards

Tony

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