Technical Feasibility Study on a Contra-rotating Ocean Current Turbine - From the perspective of motion characteristics
二重反転タービン式海流発電装置の技術的成立性に関する研究
Recently, research and development (R&D) of marine renewable energy became very popular all over the world. In this paper, the contra-rotating turbines are adopted as an ocean current power generator. The contra-rotating turbine system is theoretically torque free, since the second blade counters the first blade torque. Therefore, small main body (pod) and low cost mooring might be achieved. In this paper, a conceptual design of the contra-rotating ocean current turbine is presented. A computer code, which represents motions of the pod and turbines with 6 degrees of freedom together with the non-linear mooring effect, is developed. The numerical results are compared with experiment in which a newly developed small size turbine-generator model is used. The results show that the current turbine is stably moored even when the flow direction is suddenly changed. An attempt to reduce the pod motion by controlling the blade pitch angle is also discussed and it is found that it could be possible to reduce both long and short period unsteady motions. Summarizing these results, it is concluded that the contra-rotating ocean current turbine has a technical merit from the perspective of motion characteristics.
- Record URL:
- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/18803717
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Authors:
- Takagi, Ken
- Matsuda, Kazuya
- Suyama, Yuki
- Publication Date: 2013
Language
- English
- Japanese
Media Info
- Media Type: Digital/other
- Features: Figures; References; Tables;
- Pagination: pp 107-114
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Serial:
- Journal of the Japan Society of Naval Architects and Ocean Engineers
- Volume: 17
- Issue Number: 0
- Publisher: Japan Society of Naval Architects and Ocean Engineers
- ISSN: 1880-3717
- EISSN: 1881-1760
- Serial URL: https://www.jstage.jst.go.jp/browse/jjasnaoe/-char/en
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Publication flags:
Open Access (libre)
Subject/Index Terms
- TRT Terms: Design; Feasibility analysis; Ocean currents; Rotation; Turbines
- Subject Areas: Bridges and other structures; Design; Marine Transportation; I20: Design and Planning of Transport Infrastructure;
Filing Info
- Accession Number: 01505930
- Record Type: Publication
- Source Agency: Japan Science and Technology Agency (JST)
- Files: TRIS, JSTAGE
- Created Date: Jan 28 2014 5:01PM