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.

Performance Analysis of a Savonius Wind Turbine in the Solar Integrated Rotor House

Abstract: Rooftop, building integrated and building augmented micro wind systems have the potential for small scale power generation in the built environment. Nevertheless, the expansion of micro wind technology is very slow and its market is strongly affected by the low efficiency of conventional wind generators. WAG-RH (Wind Accelerating and Guiding Rotor House) which is a new technique introduced to enhance the efficiency of vertical axis rotor. The present study utilizes other green energy element by integrating the WAG-RH with a solar heating system. In this effort roof of the WAG-RH has been utilized to heat air through micro solar chimney for creating buoyancy effect in the air flow channel at rotor zone in the WAG-RH. The integration is capable of improving the performance of rotor setup in the WAG-RH as well as providing hot air with sufficient air mass flow rate for space heating. The WAG-RH had brought about 138% increase in the performance coefficient(Cp) of conventional three bladed Savonius rotor, whereas solar integrated WAG-RH has contributed 162% increase in the Cp of the same rotor.

The effect of blade curvature angle of savonius wind turbine l-type on the performance

Abstract: The wind is a renewable energy source (alternative energy) as a substitute for the dwindling fossil fuel. L-type Savonius wind turbine is a technology that is widely used to convert wind energy into mechanical because its construction is simple and cheap. The disadvantage of this turbine is having a lower efficiency than other types of wind turbines. Modification of the curvature of the L-type Savonius wind turbine blade is assumed can improve its performance because it affects the direction and magnitude of wind and wheel velocity, consequence impact to power. Thus, the blade angle is interesting to review. There are three angles of blade studied: 30o, 45o, and 60o. Based on results, the blade angle influences the performance of the L-type Savonius wind turbine, where the 45o blade angle produced better performance than 30o and 60o.

Computational Analysis on Savonious Vertical Axis Wind Turbine to enhance the performance

Abstract: Savonius wind turbine is the simplest type of vertical axis rotor that has a relatively low Efficiency, but can operate throughout the year even with wind speed as low as 4 to 5 m/s. Operation of the Savonius wind turbine is based on the difference of the drag force on its semi-cylindrical blades, depending on whether the wind is striking the convex or the concave part of the blades. This turbine is being used in various countries around the world due to the simplistic design, ordinary workmanship for construction, and has a good starting torque along with independency towards wind direction at low wind speeds. The main goal of this current research is to investigate the aerodynamic performance of Savonius wind turbine. The numerical study conducted in this paper aims to investigate the effect of number of blades on the performance of the model of Savonius type wind turbine. Numerical investigation on 2, 3, and 4 blades wind turbines has been carried out using ANSYS FLUENT 15.0 to show torque and power coefficient related with wind speed on different tip speed ratios. The results of study showed that number of blades influence the performance of wind turbine. Savonius model with three blades has the best performance at Tip speed ratio 1.0 when compared to other blades. Moreover, significant improvement was observed in the torque and power coefficients on all the three blades as the free-stream velocity increases.

The interactions of I-65° type cylinder and Savonius wind turbine for performance improvement

Abstract: Several advantages of the Savonius wind turbine, among others independent of wind direction, simple and cheaper in its design and higher starting torque at low wind streams. However, The Savonius wind turbine has the lowest peak coefficient of power compared to another type of wind turbines. This fact act as the reason much research conducted to augment the performance of turbine Savonius. This study experimentally investigated the capabilities of the Savonius wind turbine by mounting an I-65° type cylinder upstream of the convex returning blade. Based on the free stream velocity maintained at U = 9 m/s and the characteristic length of L = 2D-e (where D is blade diameter, and e is thick of blade), the Reynolds number (Re) can be then calculated to produce Re = 1.78 × 105, and implemented for carry out this experimental study. The space between the cylinder I-65° type to the center of the convex turbine blade fixed for 1.2≤S/D≤2.2. The diameter of I-65° type cylinder determined fixed at 0.5 times diameter turbine blade. The experiment result shows that the mounting of the cylinder I-65° type upstream of the convex turbine blade is useful for improving turbine performance. This improvement has clearly proven optimized for the Reynolds Number Re = 1.78 × 105. The coefficient power (Cp) of the turbine with the cylinder I-65otype is higher than the conventional Savonius wind turbine. The maximum power coefficient (Cp) of the Savonius turbine equipped with I-65° type cylinder increases up to 19.64% compared to the conventional turbine. These excellent results obtained for Tip Speed Ratio (λ) of 0.58.