A Study on Power Performance of a 1kW Class Vane Tidal Turbine
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Recently, tidal current energy conversion is a promising way to harness the power of tides in order to meet the growingdemands of energy utilization. A new concept of tidal current energy conversion device, named Vane Tidal Turbine (VTT), isintroduced in this study. VTT has several special features that are potentially more advantageous than the conventional tidal turbines,such as propeller type tidal turbines. The purpose of this study on VTT is to analyze the possibility of extracting the hydrokineticenergy of tidal current and converting it into electricity, and evaluate the performance of turbines for various numbers of blades (six,eight and twelve) using Computational Fluid Dynamics (CFD). At various tip-speed ratios (TSR), the six-bladed turbine obtains thehighest power and torque coefficients, power efficiency is up to 28% at TSR = 1.89. Otherwise, the twelve blade design captures thesmallest portion of available tidal current energy at all TSRs. However, by adding more blades, torque extracted from the rotor shaftof twelve-bladed turbine is more uniform due to the less interrupted generation of force for a period of time (one revolution).
Abstract
Recently, tidal current energy conversion is a promising way to harness the power of tides in order to meet the growingdemands of energy utilization. A new concept of tidal current energy conversion device, named Vane Tidal Turbine (VTT), isintroduced in this study. VTT has several special features that are potentially more advantageous than the conventional tidal turbines,such as propeller type tidal turbines. The purpose of this study on VTT is to analyze the possibility of extracting the hydrokineticenergy of tidal current and converting it into electricity, and evaluate the performance of turbines for various numbers of blades (six,eight and twelve) using Computational Fluid Dynamics (CFD). At various tip-speed ratios (TSR), the six-bladed turbine obtains thehighest power and torque coefficients, power efficiency is up to 28% at TSR = 1.89. Otherwise, the twelve blade design captures thesmallest portion of available tidal current energy at all TSRs. However, by adding more blades, torque extracted from the rotor shaftof twelve-bladed turbine is more uniform due to the less interrupted generation of force for a period of time (one revolution).
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