INVESTIGATION AND MODIFICATION OF HYDROKINETIC SAVONIUS TURBINE FOR LOW WATER SPEEDS

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2022-11

Author

Ike-Offiah , Chiedozie Augustine

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With the ever-growing global interest in reducing greenhouse gases such as CO2, renewable energy options present a good energy alternative. Not only are they a sustainable option in their operational period, but they also have a low implementation cost especially, when compared to conventional fossil fuel sources. Hydrokinetic turbines have the advantages of energy predictability, relatively low visual impact, a high energy density, high capacity factor, and ease of manufacture, in addition to the low cost of deployment. This study focuses on the investigation and modification of Savonius hydrokinetic turbines operating at a low speed. ANSYS CFX as the commercial solver is utilized to simulate the transient flow field using the slidingmesh technique, along with the proper boundary conditions. Important controlling parameters include the aspect ratio (AR), overlap ratio, and shape of the blades. The numerical set up is validated by comparing the results with the results of available studies in literature. The elliptical-shaped blade design, is proposed in this study since it generates higher positive torque in comparison with that of the conventional one. The optimal overlap ratio is found for the modified design based on available literature, while the optimal AR is detected by testing different AR values

Subject Keywords

Renewable Energy, Hydrokinetic Energy Systems, Computational Fluid Dynamics (CFD), Savonius turbine, Numerical Analysis

URI

https://hdl.handle.net/11511/101964

Collections

Northern Cyprus Campus, Thesis

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Citation Formats

C. A. Ike-Offiah, “INVESTIGATION AND MODIFICATION OF HYDROKINETIC SAVONIUS TURBINE FOR LOW WATER SPEEDS,” M.S. - Master of Science, Middle East Technical University, 2022.