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oapen-20.500.12657-493752021-11-23T14:01:20Z Chapter Tidal Turbine Generators Polinder, Henk Wani, Faisal Dong, Jianning tidal stream turbines, permanent magnet generators, flooded generators, corrosion, rotor-can bic Book Industry Communication::T Technology, engineering, agriculture::TB Technology: general issues::TBC Engineering: general Recently, tidal stream turbines have become a preferable mode of harvesting tidal energy. The main issue for low utilization of tidal energy is the high levelized cost of energy (LCoE) from tidal stream turbines. A major reason for this is the high operation and maintenance costs for submerged installations. A possible way of minimizing the LCoE and improving the availability is to use a flooded (or a wetgap) generator rather than a conventional airgap generator. Inside flooded generators, the gap between the stator and rotor is filled with the seawater. This architecture has the potential to improve cooling and reduce reliance on ancillary systems (e.g., bilge system), thereby improving reliability. The chapter begins with a brief description of the generator systems used in current tidal stream turbines. The focus of the chapter is, however, to give a basic insight into the design aspects of the flooded generators, and compares it with the currently used sealed airgap generators in tidal turbine systems. 2021-06-02T10:13:31Z 2021-06-02T10:13:31Z 2020 chapter ONIX_20210602_10.5772/intechopen.90433_489 https://library.oapen.org/handle/20.500.12657/49375 eng application/pdf n/a 70560.pdf InTechOpen 10.5772/intechopen.90433 10.5772/intechopen.90433 09f6769d-48ed-467d-b150-4cf2680656a1 H2020-LCE-2016-RES-CCS-RIA 727793 open access
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Recently, tidal stream turbines have become a preferable mode of harvesting tidal energy. The main issue for low utilization of tidal energy is the high levelized cost of energy (LCoE) from tidal stream turbines. A major reason for this is the high operation and maintenance costs for submerged installations. A possible way of minimizing the LCoE and improving the availability is to use a flooded (or a wetgap) generator rather than a conventional airgap generator. Inside flooded generators, the gap between the stator and rotor is filled with the seawater. This architecture has the potential to improve cooling and reduce reliance on ancillary systems (e.g., bilge system), thereby improving reliability. The chapter begins with a brief description of the generator systems used in current tidal stream turbines. The focus of the chapter is, however, to give a basic insight into the design aspects of the flooded generators, and compares it with the currently used sealed airgap generators in tidal turbine systems.
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