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Post Info TOPIC: Current Turbine Concrete Hull


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Current Turbine Concrete Hull
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Current turbine. In a similar way as offshore wind farms are becoming important energy production assets, submerged current turbines have been tested and installed successfully. Current turbines based on cocrete hulls like the one in the picture below can be an elegant solution. It would merley be changing the propeller blades to a much bigger version and change the engine with a generator. Access to the turbine for generator maintenance could be done by a tubular structure from the surface.

The installation could be made almost entirely submerged for little impact on ship traffic and no disturbance by weather and waves. The concrete hull allows a maintenance free service life of the turbine body of several decades - you can not achive that in steel - putting the whole turbine into a drydock for gritblasting is extremly expensive. This turbine can be towed to the anchor location like a submarine and get the turbine blades installed by divers.

4603501326_3267028eb5_o.jpgShtokman_-Troll_A_co_26445d.jpgimages?q=tbn:ANd9GcQpisnz5w0I9jWdluKPEXxFwoFH9lrwioM46F-69MKopLIgogaUsubmarine_yacht_18m_200_ton.jpgsubmarine-yacht.jpgturbines540.jpgseagen_imbedded_use.jpg

Wil

concretesubmarine.com

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-- Edited by admin on Saturday 4th of July 2015 05:35:23 AM

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Is there a current turbine project that is already producing energy?

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There is a project in England (http://www.marineturbines.com/) which is commercial.

The basic problem of any steel structure in ocean conditions is that the service life of the structure is short due to corrosion and the need of a expensive and tight maintenance shedule.

seagenhasbeenin_165029.jpg

The oil / gas industry is increasingly steering away from steel structures when it comes to platforms on the ocean. Projects like Ekofisk, Troll A, Heidrun, Nkossa, Adriatic LNG, Glomar Beaufort, show the way to maintenance free floating concrete structures in open ocean conditions with a maintenance free service life of 200 years.

The ocean ambient also introduces load cycles into a structure that are in the order of 1 mio cycles per year. This can lead to fatique in steel structures.  Concrete structures are by far less suceptible to fatique.

Wil

concretesubmarine.com



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water is 800 times more dense than air - there should be a big amount of energy in ocean currents.



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The concrete submarine hull as body for a current turbine

tidal_turbines.jpg



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dynamic forces on concrete structures of wind turbines
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The paper deals with the dynamic performance of a simply reinforced concrete tower built using prefabricated elements. The main uncertainty of this strategy stems from the possible cracking of the concrete and its implications on the stiffness, natural frequency and dynamic amplification of the tower. In 2006 an 80 m high prototype was built, supporting a 1.5 MW wind generator, carefully instrumented and test loaded to 80% of its design capacity. The prototype and installed instrumentation remained in operation for 3 years. Detailed calculations were carried out of the cracking induced in the concrete and its effects on the natural frequency of the tower, as a function of wind speed and orientation; the results were compared with the monitoring data. It is concluded that numerical modelling with Abaqus allowed good predictions and interpretations of the observed response of the tower. Also, simply reinforced concrete is shown to be a good option for high towers; if the structure is well designed, the natural frequency will not migrate to a point where its proximity to the forcing frequency will lead to unacceptable levels of the dynamic amplification.

read more...



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RE: Current Turbine Concrete Hull
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In general terms concrete is known to deal much better with dynamic forces and fatigue issues than steel.

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Reading List:

Basic Concrete Engineering for Builders with CDROM / Design of Concrete Structures / Strength Design for Reinforced - Concrete Hydraulic Structures Engineering Manual on CD / Design of Offshore Concrete Structures / Construction of Marine and Offshore Structures, Second Edition (Civil Engineering - Advisors) / The Dock Manual: Designing/Building/Maintaining / Theory and Design of Concrete Shells / Thin Shell Concrete Structures / design procedures of reinforced concrete shell structures (JGJT 22-98) / Understanding Structures / Concrete Planet: The Strange and Fascinating Story of the World's Most Common Man-made Material / Concrete Construction Manual (Construction Manuals (englisch)) / Large Wind Turbines: Design and Economics / Dynamics of Offshore Structures / Offshore Technology in Civil Engineering / Design of Offshore Concrete Structures / Concrete in the Marine Environment (Modern Concrete Technology)

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Concrete Floating Structures

Surface Floating Concepts:

The axes of ocean colonization / floating real estate building lots on the water / Plate Seastead - Plate Floating Element for Ocean Colonization / Catamaran Concrete Floating Elements - Base for Ocean Living / Floating Concrete Breakwater Marina / Ocean colonization how to get there / Ramform ship island as ocean base mobile stable scaleable / small honeycomb floating concrete structures in cartagena / Seabreaks for dampening colossal ocean waves / Ocean colonization technology / Ocean colonization company / Oustanding floating concrete structures / ocean colonization general considerations / Interesting projects for ocean colonization / Aquaculture, business, trade, mininig, energy, salvage, making money afloat /

Submerged Concepts:

The captain nemo float out - seasteading / Sub movement finished - Submarine Yacht / Is submarine living space expensive? / concrete pressure vessel / Concrete submarine project / submarine yacht / concrete submarine yacht supporter club / Submerged living space bubble concept basics / Exotic Submerged Bubble Hotel / sea orbiter / Current Turbine Concrete Hull /



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Costain plans concrete base wind turbine revolution

Partners Costain, Hochtief and Arup have won Government funding to test a new design of concrete bases for large offshore wind turbines.

The Gravitas Offshore consortium hopes to use flask-shaped concrete gravity bases to anchor wind turbines, rather than deep monopiles in the the sea bed, opening a market worth up to £50bn and revitalising the concrete industry.

The mass-producible, self-floating concept is designed for large-scale wind turbines, substations and met-masts, to be installed at sites with water depths greater than 25m.

A £550,000 grant from Department of Energy and Climate Change will be used to demonstrate the cost-effectiveness of this approach against offshore installation of mono pile foundations, which has proved technically challenging.

In some cases grouting around the single deep pile foundation has shown signs of stress cracking.

Gravitas Offshore has also reached an advanced stage to commit to the construction of a demonstrator foundation for deployment in UK waters within the next two years.

 

 

http://www.constructionenquirer.com/2012/09/21/government-backs-costain-concrete-base-wind-turbine/






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Richard Branson, Necker Island, Virgin Oceanic, James Cameron, Bob Ballard, Chris Welch, Wilfried Ellmer, floating concrete platforms, honeycomb floating platform, floating concrete shell construction, ocean colonization business alliance, ocean base, deep sea investigation, vent base alpha, deep sea mining, oceanic aquaculture, floating structure development, floating marina development, key player network, underwater hotels, underwater tourism development, submarine yacht, seasteading, Peter Thiel, ocean investigation, business, Greg Venter,

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/ Contact / Order / Source / Info /



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concrete sphere wind energy storage sistem



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yook3.com

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Why oceanic business is the next big thing to come:

concretesubmarine.activeboard.com/t56680633/the-reasons-why-oceanic-business-is-the-next-big-thing-to-co/

The Captain Nemo Lifestyle:

concretesubmarine.activeboard.com/t43942461/the-captain-nemo-float-out-seasteading/

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Get a foothold in ocean colonization:

concretesubmarine.activeboard.com/t49529137/oceanic-frontier-develpment-investment-foothold-in-ocean-col/

The Captain Nemo Lifestyle:

concretesubmarine.activeboard.com/t43942461/the-captain-nemo-float-out-seasteading/

Why oceanic business is the next big thing to come:

concretesubmarine.activeboard.com/t56680633/the-reasons-why-oceanic-business-is-the-next-big-thing-to-co/

Ocean sphere fish farming:

concretesubmarine.activeboard.com/t55433095/ocean-sphere-the-next-wave-of-sustainable-fish-farming/

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in this context also check the ORES wind energy storage sistem:
concretesubmarine.activeboard.com/t56101129/concrete-sphere-wind-energy-storage-sistem/

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/ Lens shell pictures overview / / Ramform floating home pictures / / c-shell floating home pictures / / Floating concrete building methods / / shell cluster pictures / / investor proposal list /



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Wilfried Ellmer


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The big five business fields of ocean colonization: | oceanic transport | oceanic energy | oceanic real estate | deep sea mining | oceanic aquaculture |




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