You missed the part where the tens of thousands of fish died the same week the turbine was put into operation.
http://thechronicleherald.ca/novascotia/1428745-studies-lacking-in-bay-of-fundy-fish-kill-say-fishermen That particular model is putting a strong magnetic field (1,200,000 nT) through the open, conductive saltwater gap, between rotor and stator. Things corrode very quickly when you put a voltage in seawater. All of their sacrificial zincs were gone when they pulled the turbine after a few months. While it was connected the first 3 months I calculated it only supplied enough power to the grid to power a few household treadmills. I guess it is more environmentally friendly to be killed by green energy. On Fri, Oct 27, 2017 at 10:25 PM, Jed Rothwell <jedrothw...@gmail.com> wrote: > The potential energy from tides, waves and the Gulf Stream is immense. > People have known that for a long time. There have been many attempts to > tap these sources. They have failed because the ocean environment is so > challenging. Ships and boats require constant maintenance. My father, who > grew up among them on Long Island and Bermuda, said that a boat is "a hole > in the water into which you pour money." > > The Bay of Fundy is one of the most promising places for tidal generation. > A large generator was installed there in 2009. It failed *within days*. > See: > > http://www.cbc.ca/news/canada/nova-scotia/tidal-power-bay- > of-fundy-turbine-electricity-emera-hydro-1.3862227 > > Think about that. Here we are in the 21st century with computer > simulations, immense knowledge of engineering, materials and so on, yet > this machinery failed as quickly as the first transatlantic cable did in > 1858! Because putting things under the ocean is difficult. H. G. Wells was > a technophile yet in 1901 he said, "my imagination refuses to see any sort > of submarine doing anything but suffocate its crew and founder at sea." > > I am not saying this technology will never work, but the fact that a > megawatt-scale installation failed within days is telling. It's telling you > this is a lot harder than it looks. > > Tapping a flow of fresh water in a stream or river is a lot easier. People > have been doing that for ~2,500 years. > >
