A LOW CUT-IN SPEED MARINE CURRENT TURBINE

Alam, Md. Jahangir and Iqbal, M.T. (2010) A LOW CUT-IN SPEED MARINE CURRENT TURBINE. The Journal of Ocean Technology, 5 (4). pp. 49-61. ISSN 1718-3200

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Abstract

Ocean currents are a source of renewable energy similar to wind and solar energy. This untapped energy is extractable using underwater turbines capable of converting water kinetic energy into mechanical energy. A turbine with a low cut-in speed is needed to get maximum energy from the marine current. In this paper, a Hybrid turbine based on the Darrieus and Savonius vertical axis turbine has been introduced which exploits good features of both turbines. The design procedure elaborates the Hybrid structure of a four straight bladed H-Darrieus (lift type) turbine along with a double step Savonius (drag type) turbine. The Savonius turbine is placed on the middle of Darrieus turbine on the same shaft. The Hybrid turbine is built and tested in a flume tank at various flow speeds. This paper provides the system design and test results. The design will be used for a seafloor power generation system to power an array of marine sensors for monitoring seabed activity.

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