Comparison of concrete and steel semi-submersible floaters for 10MW wind turbines
| Autor: | Sho Oh |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of Physics: Conference Series. 2018:012029 |
| ISSN: | 1742-6596 1742-6588 |
| Popis: | Prestressed concrete floaters are gaining growing interest for floating wind turbines, while different material properties can affect the characteristics of floater motions and the range of suitable floater geometries. In this study, a basic geometry of a semi-submersible floater for 10MW is designed, based on which sensitivity study of the material property on floater design is conducted. It was found that minimum floater pitch angles achieved by selecting the optimum floater geometries were similar for the three types of material, while larger values of geometrical variables were required for concrete floaters than for steel floaters for a floater pitch limitation. If larger wall thickness was to be required for concrete structures due to, for example, corrosion protection and crack limitation, generally larger side column width and lower hull length were required for concrete floaters. As the sensitivity of pitch angle to the wall thickness was more affected by wind excitation than wave excitation for normal concrete, it is indicated that the design space for the length of hull can be widened by combining the design with the wind turbine controller methods in the treatment of the maximum thrust force. Lightweight concrete had advantages over normal concrete in the lower center of gravity. The raw material cost of lightweight concrete was higher than normal concrete but significantly lower than steel floaters. |
| Databáze: | OpenAIRE |
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