On Thu, 11 Dec 2008 08:20:59 -0000, "David Looser"
wrote:

"Trevor Wilson" wrote in message
...


"Adrian C" wrote in message
...

Where in a hydro-electric station do you get steam?

**Water is just condensed steam.


Indeed it is, but that fact is neither here nor there as far as power
generation is concerned. It's not the fact that steam is evaporated water
that makes it useful, it's the pressure that results from the evaporation
(which in turn derives from the heat energy that has to be provided).

You can't generate power from plain, still water; hydro-electric power
depends on the mass and potential energy of the water.

David.


Hydro-electicity is a reasonably pure form of solar power. The sun
puts the water on top of the mountain, and you use the energy it gives
off as it falls back down again.

d