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harness the tides ... with a float.... A large hollow pad would float on the surface anywhere at sea, and would be connected by a rod to a machine anchored to the seafloor, and as the tide rose and fell, the float also would, transmitting the motion to a generator.
Agree with David that conservation, efficiency, and usage are key areas to address; much easier to make savings there than generate cheap green energy. Although I see no reason that this shouldnt be in tandem with new schemes - just that the new ideas cannot be seen as an alternative to cutting our baseline usage.on the tidal issue - Geezer and BC wrote some great posts about tidal energy a year or so ago. You gotta do the maths; sometimes the energy returns really don't match up with common-sense expectations - and that's the theoretical maximum return, not the actual return after countless losses and inefficiency within the generation process. http://www.thenakedscientists.com/forum/index.php?topic=41578.0
It was reported last September by the Guardian that the department of energy and climate change had commissioned a report from the Crown Estates on the available of tidal energy around the UK shore lines.The report revealed that there was the potential of extract 153,000 MW of energy. The question is how can we get at this energy? Surely, wind power is good but is it an unpredictable source and we need to keep the grid running at peak evening times not just when the wind blows.CliveS