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Design procedure of an innovative turbine with rotors rotating in opposite directions for the exploitation of the tidal currents
In this work an innovative on-shore marine turbine has been deployed. The peculiarity is the anchoring system, consisting in a rope subjected only to a tensile stress, a central deflector, responsible of the equilibrium in the horizontal plane, and a floating stabilizer, keeping the machine in verti...
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Published in: | Energy (Oxford) 2014-12, Vol.77, p.254-264 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | In this work an innovative on-shore marine turbine has been deployed. The peculiarity is the anchoring system, consisting in a rope subjected only to a tensile stress, a central deflector, responsible of the equilibrium in the horizontal plane, and a floating stabilizer, keeping the machine in vertical position. The introduction of a couple of rotors, instead of one, has been an important step in the machine design. By rotating in opposite direction the rotors make the machine free from any torsional effects. Based on the experience gained, the design procedure of this turbine is described. Considering the equilibrium conditions as a key point of the design, the equations in the horizontal and vertical plane are obtained. In the horizontal plane the equilibrium is guaranteed by a central deflector while in the vertical one is guaranteed by a buoyant stabilizer. After several calculations and simulations, carried out for the site of Punta Pezzo (Messina – Italy), the energy output and the payback time has been evaluated.
•A new self-balancing tidal turbine for collecting energy has been designed.•The turbine is anchored to the coast by a steel rope, no infrastructures are needed.•The equilibrium is given by a deflector installed in the middle of the blades disc.•A design procedure, able to find the turbine optimal configuration, has been set up.•A pilot plant for a Calabria site has been evaluated and will be shortly profitable. |
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ISSN: | 0360-5442 |
DOI: | 10.1016/j.energy.2014.08.044 |