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2012-08-09. The Search for Energy Takes a Turn Underwater |

posted Aug 25, 2012, 1:52 PM by Alan Gould
by Jess Bidgood, New York Times. An article relevant to GSS Energy Use chapter 10. Excerpt: The fearsome tides that sweep out from the easternmost shores of the United States have for more than 80 years teased engineers and presidents like Franklin D. Roosevelt, who have dreamed of harnessing their force to make electricity. …And next week, a device that looks a bit like an eggbeater turned sideways will be lowered into the water here to catch the energy of the rushing water, spinning a generator that, come September, is scheduled to begin sending power to the grid. …The Bay of Fundy has some of the world’s highest tides, causing extreme currents that are pushed even faster by the inlets and islands that speckle this rocky coast. They will propel the turbine’s blades, which twist around like the helix shape of DNA….When this project starts delivering electricity to the grid under a power-purchasing agreement, it will be the first tidal-power turbine to do so in the United States, says Steven G. Chalk, the deputy assistant secretary for renewable energy. …The first turbine generator unit has a maximum output of 180 kilowatts, which would power about 30 homes. That is one-sixth the output of a typical wind turbine, although TidGen will turn more than a wind turbine, since the currents will push more consistently than wind. …. Read the full article: http://www.nytimes.com/2012/08/10/us/turbine-to-harness-the-tides-to-generate-power.html?_r=1&nl=todaysheadlines&emc=edit_th_20120810