Hydroelectricity times N
August 16, 2007 9:06 AM Subscribe
Power generation: Let's say we have a hydroelectric dam. My understanding is that water turns a dynamo, which provides electricty. It seems like there would be a way to use the same water flow more than once. Could we make raceways of some indeterminate length to get the water back up to speed with sufficient force to turn a second dynamo? Could this be repeated so that a single water flow powers some n dynamos? What kind of constraints keep dams all over the world from doing this sort of thing?