Experiments on the magnetic coupling in a small scale counter rotating marine current turbine

[摘要] Modern economies are dependent on energy consumption to ensure growth or sustainable development. Renewable energy sources provide a source of energy that can provide energy security and is renewable. Tidal energy is more predictable than other sources or renewable energy like the sun or wind. Horizontal axis marine current turbines are currently the most advanced and commercially feasible option for tidal current convertors. A dual rotor turbine is theoretically able to produce more power than a single rotor turbine at the same fluid velocity. Previous experiments for a counter rotating dual rotor horizontal axis marine current turbine used a mechanical oil seal coupling that caused mechanical losses when water entered through small gaps at the shaft. A new magnetic coupling assembly eliminates the need for a shaft to connect physically with the internal mechanisms and is water tight. This reduces mechanical losses in the system and the effect on the dual rotor performance is presented in this paper.

[发布机构] Department of Mechanical Engineering, Graduate School, Korea Maritime and Ocean University, 727 Taejong-ro, Yongdo-gu, Busan; 606-791, Korea, Republic of^1;Division of Naval Architecture and Ocean System Engineeing, Korea Maritime and Ocean University, 727 Taejong-ro, Yongdo-gu, Busan; 606-791, Korea, Republic of^2;Division of Mechanical Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Yongdo-gu, Busan; 606-791, Korea, Republic of^3

[效力级别] 工业技术 [学科分类] 工业工程学

[关键词] Counter rotating;Fluid velocities;Horizontal axis;Marine current turbines;Mechanical loss;Renewable energies;Renewable energy source;Source of energy