Savonius wind turbine

About: Savonius wind turbine is a research topic. Over the lifetime, 333 publications have been published within this topic receiving 6521 citations.

Experimental Investigation on a Ducted Savonius Vertical Axis Wind Turbine and its Performance Comparison with and without Endplates

Abstract: As the energy demand is growing and fossil fuel based energy resources are getting depleted, there has been an increased focus on the use of renewable energy resources. Wind energy is a highly suitable energy resource that can be harvested for the purpose. This research deals with the design and fabrication of novel designs as a mean to harness wind energy using a ‘Savonius’ Turbine. It is generally employed to harvest the low to very low wind speed potentials. The paper introduces a novel concept about a Ducted Savonius wind turbine where power generation can increase more than 10 folds. The paper provides experimental validation of the effect of using a converging ducted structure with a single stage and double stage configurations of a Savonius wind turbine. The paper also compares the turbine’s performance with and without endplates and compares Single Stage and Double Stage Turbine. The experiment results show that around 15% increase in tangential blade velocity in single stage rotor when end plates are used. The results of the study proves that power coefficient increases with the addition of a converging ducted structure with the Savonius wind turbine, and also with the use of endplates.

Development of a Dual Wind Turbines using the Savonius and Archimedes Spiral Principle

Abstract: This paper presented the combination of Archimedes Spiral Wind Turbine and Savonius Wind Turbine. The Savonius was uses as the vertical axis wind turbine while the Archimedes is horizontal axis wind turbine. The integrated data logger was responsible for the gathering of measured values such as the voltage, current, rpm and battery percentage. Wind speeds, turbine speeds, and generated voltages were also measured. Relationships between parameters were then observed. Results showed that the Archimedes wind turbine has faster RPM and produces more voltage with the same wind speed with Savonius wind turbine when operated individually. The Archimedes wind turbine was able to generate an average voltage of 7.04 V and an average power of 5.10 W while Savonius wind turbine was able to generate an average voltage of 2.70 V and an average power of 1.23 W. Their combination was able to generate an average voltage of 9.73 V and an average power of 6.32 W. Savonis wind turbine, though low in its performance, did a complementary job during starting rotation when the two types of wind turbine where combined together as one energy harvesting system.

CFD Analysis of a Finite Linear Array of Savonius Wind Turbines

Abstract: Vertical axis wind turbines such as Savonius rotors have been shown to be suitable for low wind speeds normally associated with wind resources in all corners of the world. However, the efficiency of the rotor is low. This paper presents results of Computational Fluid Dynamics (CFD) simulations for an array of Savonius rotors that show a significant increase in efficiency. It looks at identifying the effect on the energy yield of a number of turbines placed in a linear array. Results from this investigation suggest that an increase in the energy yield could be achieved which can reach almost two times than the conventional Savonius wind turbine in the case of an array of 11turbines with a distance of 1.4R in between them. The effect of different TSR values and different wind inlet speeds on the farm has been studied for both a synchronous and asynchronous wind farm.

Optimization of Two and Three Rotor Savonius Wind Turbine

Abstract: The present work investigates the performance of Savonius wind turbine using two or three rotors The new turbine design was found to have higher power coefficient compared with single rotor design The peak average power coefficient of the three rotors was computed to be 50% higher than that of the single rotor design The torque coefficient was also higher than that of the single rotor turbine at high tip speed ratio This improved performance is attributed to the favorable aerodynamic interaction between the rotors which accelerates the flow around the rotors and generates higher turning torque in the direction of rotation for each rotor The optimized arrangement of rotors showed that the upstream rotor and one downstream rotor should have a similar direction of rotation while the second downstream rotor is rotating in opposite directionCopyright © 2015 by ASME

A numerical study of the turbulence model influence on a savonius wind turbine performance by means of moving mesh

Abstract: This numerical research has investigated the influence of the turbulence model on a Savonius wind turbine performance. The numerical simulation has been applied by using two-dimensional analysis of Computational Fluid Dynamics through moving mesh technique to solve the incompressible Unsteady Reynolds Averaged Navier-Stokes equations. In this study, the turbulence model has used RNG k-epsilon, standard k- epsilon, Realizable k- epsilon, SST k-omega, standard k- omega, and spalart-allmaras. Firstly, the numerical model has been verified by the experimental data towards the torque coefficient at a tip speed ratio (TSR) of 1.078 and has used the Realizable k-epsilon (RKE). Then the turbulence models are compared with experimental data towards torque coefficient at TSR change. The verification has been achieved and compared to the turbulence model variations. The results of numerical simulation reveal that Realizable k-e (RKE) has the performance approach of experimental data within the Cp Error about 1.67% at TSR of 0.9.