Originally Posted by AemJeff
Yeah, but this is about storage, not production; and doesn't require a river or an ocean as an energy source. And it doesn't necessarily have to be installed on an industrial scale. A single house, or a neighborhood, could use a system like this to bank whatever transient energy sources might be available to them.
Btw, I've just been moved from 95% work at home to a mostly on site presence. Feugh.
Re: gravity and water as energy storage: Yes people do it, but I think it is necessarily a large project. Dinorwig power station's wikipedia entry is an interesting read
. I'll look around for more examples. I remember a friend of mine telling me about this being done recently, but I don't remember the location.