The Bottom Feeder
Water is 800 times denser than air, and building a generator able to withstand the tremendous force it generates has hampered the development of next-gen hydropower. If engineers can harness its energy, water holds great potential: about 1,420 terawatt-hours per year, or roughly a third of U.S. annual electricity usage.
Tame the Tide
Tidal currents are among the most predictable energy sources on Earth. Until recently, the only way to capture their power was to construct massive dams that impeded the flow of water, often in sensitive marine areas. The TidGen, developed by the Ocean Renewable Power Company (ORPC), sits at the bottom of a free-flowing deep river or bay instead. The company installed its first commercial unit in Maine's Cobscook Bay last summer, and it began delivering electricity to the U.S. grid shortly thereafter. A TidGen can produce up to 150 kW, or enough electricity to power 25 homes, but ORPC plans to add 5 megawatts of capacity within three to five years.
Catch the Waves
Wave energy is more evenly distributed across the globe than tidal currents, but it's also more violent: Generators floating on the surface of the ocean must function while being thrashed around. London-based 40South Energy built a wave-energy converter that cleverly avoids abuse. It remains submerged in the water column, automatically adjusting its depth to find optimal conditions and dodge rough storms. The machine generates energy as its top half, attached to a suspended platform, pulls against the bottom half, moored to the seafloor. 40South plans to deploy its first commercial unit, the 150-kilowatt R115, near Tuscany, Italy, this summer. It's also developing a 2-megawatt version and setting up pilot wave-energy parks in India, Italy, and the U.K.
Sorry but this has got it beat...
Submitted to MIT CoLab...
As far as I can tell, the device in your first link is not designed to generate electricity. So it's hard to say it "beat" the tech in this article as they serve completely different purposes.
Your second link doesn't seem to be working.
Tidal and wave power, in my opinion, are the future of sustainable energy. Not only do those systems contain massive amounts of energy, but also because most of the world's population lives near large rivers, oceans, etc. I forsee an eventual future of every building having photovoltaics, being offset by tidal/wave generators on the coasts. In a few decades, assuming efficiency continues to increase, this should be more than enough for most mid sized cities. Throw in a next-gen nuclear reactor in those cities that are too dense to be fed by tidal/wave energy.
As laughable as the climate change debate is, renewable energy is a noble goal and I think this makes far more sense then wind or solar energy. As terterter points out most humans live relatively close to water anyways (what with it already being necessary to survival), my question is what do you do about the other 2/3 of energy demand? I mean, the whole goal here is to move towards 100% renewable energy.
tertertert,Copy and paste links into address bar then go to them... The links worked fine for me. There is plenty of Kinetic Energy in the Gulfstream to generate electricity from 24/7/365 unlike tidal power,wave power or solar power....
That's your problem, not ours, CYCLONEBUSTER. The weakness in your argument is that the Gulf Stream lies much farther off shore.
I sense massive sea water corrosion problems and the maintenance costs or replacement costs can be enormous. I hope I'm wrong because one third of the energy is a huge amount. Has anyone done a cost analysis of the efficiency of such a setup?
tertertert, you are correct. This is nota power generation device. It is for CO2 sequestration in an ocea.
@uldissprogis - I was going to say the same exact thing. Salt water is highly corrosive, and most people don't realize that. The biggest engineering challenge with tidal/wave power systems is not how to generate energy, but how to deal with corrosion and biofouling that will begin affecting performance only months into service.
This is a problem that has stumped the US Navy for over 200 years, and currently costs them $3B per year.
kevin56, Really the Gulfstream is just a two miles offshore near Miami making it ten times closer to the load source than Turkey Point is... Problem solved..
uldissprogis,Nope cathodic protection takes care of the corrosion problems... It works fantastic in power plant water boxes where sea water flows through and will last more than 50 years with very little maintenance... Basically all you have to do is replace the anodes every few years...
In few years they'll build one that will produce 2MW. Not good enough!
Dr Mills at Blacklightpower.com has had 7 power plants in operation for about 4 years. The biggest is in Italy, producing 750MW. And not only that, it runs on a new form of hydrogen, a hydrino-hydride. In his process, about 1.5% of the output is used to fracture the hydrogen right from water.
Burning the hydrogen produces X amount of energy, his process releases 200X and is completely green.
Just think if the space shuttle was powered by this means. The fuel tank would be 1/200 the size, and would be filled with non-volatile water.
This is our ticket for space travel, for maybe the next few decades. Get your fuel where ever you go: Mars, the moon, and no processing or manufacturing. Just filter out the contaminants.
thumbpick,Robert L. Park, emeritus professor of physics at the University of Maryland, and a notable skeptic of dubious claims, has been particularly critical, writing:
"Unlike most schemes for free energy, the hydrino process of Randy Mills is not without ample theory. Mills has written a 1000 page tome, entitled, "The Grand Unified Theory of Classical Quantum Mechanics," that takes the reader all the way from hydrinos to antigravity. Fortunately, Aaron Barth [...] has taken upon himself to look through it, checking for accuracy. Barth is a post doctoral researcher at the Harvard–Smithsonian Center for Astrophysics, and holds a PhD in Astronomy, 1998, from UC Berkeley. What he found initially were mathematical blunders and unjustified assumptions. To his surprise, however, portions of the book seemed well organized. These, it now turns out, were lifted verbatim from various texts. This has been the object of a great deal of discussion from Mills' Hydrino Study Group. "Mills seems not to understand what the fuss is all about." – Park
I can't even post what Princeton University's physics Nobel laureate Phillip Anderson said of it but if you want to read here the link: http://en.wikipedia.org/wiki/BlackLight_Power
I have dealt with repairing and maintaining bearings under fresh water for years. Dealing with them in salt water where you would have to leave them under water to work on them in a strong current would be mission impossible. Last several times I drove through where are windmills, I saw more broken ones that running ones. Maybe that's a good thing when you read about how many birds they kill.
larhof52, Yeah me too... However,they make very good sealed bearings these days even for salt water...
@cyclonebuster - CP systems work great for bridges, tanks, and piping systems, but it gets more complicated when you are trying to throw a current to protect complex geometries or moving parts. The issue is compounded further when adding biofouling to the mix which can be resisted with coatings, but these too are imperfect. Cracks in the coating will cause localized corrosion which can lead to catastrophic failure in short order. Furthermore, corrosion in between crevices are difficult to prevent and detect. Systems must frequently be removed from the water completely in order to inspect for damage, unless you want sensitive internal components to become compromised.
I guarantee you it would not be as easy as throwing a few anodes on there and, besides the occasional anode swap-out, letting it sit for 50 years.
Always remember - nothing is corrosion proof. Nothing.
50 years is pretty long... Carbon fiber or fiberglass would last longer...
@cyclonebuster: Thanks for the reply.
According to Dr Mills, from his website, his book is not "The Grand Unified Theory of Classical Quantum Mechanics" it's "The Grand Unified Theory of Classical Physics". This is a replacement for Quantum Mechanics because QM can't explain everything from the micro to the macro, Dr. Mills theory does. This is why Parks is not in favor of it.
But, regardless of the underlying physics, his process is producing power and a lot of it. His method has been validated by numerous sources, among these are California Institute of Technology and the Massachusetts Institute of Technology. They are posted on the website.
This is one of the best ideas yet. There is lots of coastline in the world, and if you build these big enough the blades shouldn't move fast enough to harm the wildlife.
this is a good idea my fav.i will use this as a refrence since i am onley 12