Investigating impact of design modifications on the performance of a Savonius hydrokinetic turbine at low speeds

Date

2024-1

Author

Çiçek, Doğa Derman

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In recent decades, the global demand for energy has surged due to technological advancements and industrial expansion, resulting in a notable increase in greenhouse gas levels from increased fossil fuel consumption. To address these challenges, developed nations and academia are allocating more resources to projects exploring the efficient utilization of renewable energy. Hydroelectric power stands out due to its high energy density and predictability. Academic interest in harnessing current energy has grown, emphasizing water's superior energy potential compared to air. Hydrokinetic turbines offer a preferable alternative in scenarios where dam construction is impractical or unfavorable, as they eliminate the need for a reservoir. Turkey, surrounded by seas and abundant water sources, should investigate harnessing energy from its irrigation channels, rivers and currents. As the majority of Turkey's currents are slow, conventional hydrokinetic turbines with propeller blades struggle to operate efficiently. This thesis aims to address this challenge by investigating a horizontal-axis Savonius-type hydrokinetic turbine which, is specifically more efficient for slow channel streams than hydrokinetic turbines having propeller blades. The study employs numerical modeling and simulation programs to analyze the turbine's performance. The simulations are carried out by using Ansys Fluent software. The research invetigates the impact of various design modifications, such as multi-stage configurations, turbine aspect ratio, and the adoption of twisted/helical blades, on the horizontal-axis Savonius hydrokinetic turbine's (SHT) efficiency.

Subject Keywords

Savonius Hydrokinetic Turbine, Multi-stage Configurations, Aspect Ratio, Twisted/Helical Blades, Horizontal Axis

URI

https://hdl.handle.net/11511/108522

Collections

Graduate School of Natural and Applied Sciences, Thesis