A Study of the Influence of Guide Vane Design to Increase Savonius Wind Turbine Performance (original) (raw)
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Influence of tilt angle and the number of guide vane blades towards the Savonius rotor performance
Additional guide vane (GV) to the Savonius rotor is used to overcome the low rotor efficiency. This study is experimentally carried out to know the influence of guide vane in improving two blades Savonius rotor performance. There were four designs of guide vane which are 4, 5, 6 blades and installed at different tilt angles, which were 0 • , 20 • , 40 • , and 60 •. The experiment was done under wind speed of 5.9 m/s, 7.0 m/s, 8.1 m/s, 9.3 m/s and 10.4 m/s. The results show that the 6 blades of GV at a 60 • tilt angle attained the best Cp, which was 0.0279 at the tip speed ratio of 0.53. The Cp increased up to 40% with six blades of GV. Wind direction identified significantly affected the rotor performance. The rotor performed best on the wind direction of 0 • attained Cp of 0.079, but when the wind direction was modified on 30 • , the rotor with 6 GV attained Cp of 0.0153 did not perform better than without GV that produced Cp of 0.0166. The guide vanes improve the Savonius rotor performance compared to the rotor without a guide vane. However, the wind direction also needs to be considered no less important factor affecting the Savonius rotor performance.
Characteristics of the Savonius Wind Turbine Using Multiple Guide Vanes
International Journal of Fluid Machinery and Systems, 2020
This paper aims at identifying the characteristics of the Savonius Wind Turbine using a guide vane, which functions as the steering mechanism and reduces the negative torsion on the returning blade. The addition of the guide vane did not influence the turbine’s capacity in receiving wind direction. The number of guide vanes varied from 4, 8, and 16 with an angle of 45°. The testing was conducted in a wind tunnel at the wind speeds of 4 m/s, 5 m/s and 6 m/s. The turbine with the additional 16 guide vanes gave the best result. The static torsion increased by 84%, dynamic torsion increased by 57%, and the coefficient of power increased by 58% at the speed of 4 m/s.
Investigation on the effect of rotor angle and wind velocity on the Savonius wind turbine
INTERNATIONAL CONFERENCE ON BIOLOGY AND APPLIED SCIENCE (ICOBAS), 2019
Indonesia is a tropical country that has an abundant source of wind energy. This potential is generally used to drive wind turbines. However, the electrical energy produced by wind turbines is still low. If it involves the hypothesis that optimal energy is produced from an effective and efficient turbine design, the purpose of this study is the finding of the Savonius wind turbine performance from variations in rotor angle and wind velocity. This study used a quantitative approach using pre and real experimental method with randomized block design type. The implementation of the study was divided into two stages namely pre-experimental test and final experimental test. Variation of the angle used in this study divided into two groups namely group I with 0°, 30°, 60°, 90° and group II with 0°, 20°, 40°, 60°, 80°. The variations of winds speed used in this study are 3, 5, 7, and 11 (m/s). The results showed that the performance of this modified Savonius turbine was dependent on the angle position. The top group was the angle position which always showed the performance both in the wind position 5 m/s and 7 m/s and produced the best shaft rotation performance, output power, torque and work efficiency from other angular positions.
Study on performance of a savonius wind turbines related with the blade angle
Maejo International Journal of Energy and Environmental Communication, 2019
This research aimed to compare the performance of Savonius vertical axis wind turbines through blade numbers and different blade angles. In this study, applicable turbines having 4, 6, 8, 12, 16 and 18 numbers of blades with the angles of the blades of -15°, -5°, 0°, 5° and 15°, respectively. The rotor used was a semicircle shaped blade made from PVC material and has a blade diameter of 6 cm and 30 cm for both rotor diameter and height. The turbine was tested deadweight range of 0-0.49 kg at 4 m/s wind speed. The results showed that the blade angle has a positive effect on increasing the power and torque coefficient of Savonius wind turbine, specifically on blades less than 16. The highest power and torque coefficient was obtained from the turbine having16 blades at an angle of 5°. This configuration also found that the maximum power and torque coefficient in the tip speed ratio ranging from 0.3-0.4 are 0.2519 and 0.5858, respectively.
CFD Analysis of Savonius Wind Turbine with Guide Vanes
2018
This paper contains CFD analysis in the power development with the help of Savonius wind Turbine. As the express highway network is spreading all over country, on which heavy vehicles are running with high and controlled speed. So draft generated by the vehicles can be used to run wind turbine. This innovative method can generate clean energy from the wind turbine. As the availability of the wind from the vehicles will depends on traffic and atmospheric condition. Wind turbine will not solely depend on atmospheric wind; it can make use of HLV and natural wind energy resource. With positive move in this field of wind power generation, a unique power station is planned. Which will supply power to the near area and express highway. The analysis is done by using the Savonius rotor with two & three scoop of the rotor considering inlet guide vanes and the results are compared between with and without guide vane using CFD.
Performances of Savonius Rotor with Addition Guide Vane
International Journal of Renewable Energy Research, 2016
This paper aims to improve the performance of Savonius rotor with the addition of guide vane. Guide vane with angle of 45° against tangent is placed around the rotor with the aim of reducing the negative torque to the returning blade. Guide vane is used with varying amounts of 4, 8 and 16. The analysis was conducted by simulation using Computational Fluid Dynamic (CFD) and experiment. The performances of Savonius rotor with guide vane was up to 33% higher than without guide vane.
An Experimental Study on the Performance of Savonius Wind Turbines Related With The Number Of Blades
Energy Procedia, 2015
Wind energy is the most abundantly available clean form of renewable energy in the earth crust. Wind turbines produce electricity by using the power of wind to drive an electric generator. There are two kinds of wind turbines according to the axis of rotation to the ground, horizontal axis wind turbines (HAWT) and vertical axis wind turbines (VAWT). VAWTs include both a drag type configuration like Savonius wind turbine and a lift-type configuration like Darrieus wind turbine. Savonius wind rotor has many advantages over others in that its construction is simpler and cheaper. It is independent of the wind direction and has a good starting torque at lower wind speeds. The experimental 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. The experiments used to compare 2, 3, and 4 blades wind turbines to show tip speed ratio, torque and power coefficient related with wind speed. A simulation using ANSYS 13.0 software will show pressure distribution of wind turbine. 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 high tip speed ratio. The highest tip speed ratio is 0.555 for wind speed of 7 m/s.
An experimental study on improvement of Savonius rotor performance
For solving the world energy problem and the bad effect of conventional sources of energy on environment, great attention allover the world is paid towards the use of renewable energy sources. Special interest is paid towards wind energy because of its competitively.
International Journal of Mechanical Engineering and Robotics Research, 2021
The savonius rotor is a vertical-axis wind turbine which operates according to the drag forces. It is widely used as equipment with the wind as a source of energy and has a simple design, it is easy to install, good starting ability, relatively low operating speed, and independent of wind direction. Several studies have been conducted in the last decade to improve the performance of this equipment with the focus on the aspect ratio, overlap ratio, and installing additional devices such as curtain design, deflector plate, guide box tunnel, and windshields. Swirling savonius rotor is an improvement on the savonius rotor with a gap between the concave and convex blades to reduce the negative torque generated by the convex blade. This present study was conducted to analyze the power coefficients, drag coefficients, and static torque of a swirling savonius rotor with omnidirectional guide vanes by measuring the pressure distribution on the blade surfaces at different rotor angles. The experiments were conducted at a Reynolds number of 1,1x10 5 with the rotor having two semi-circular blades, an overlap ratio of 0,2, and the number of omnidirectional guide vanes varied at 4, 8, 12, and 16. The results showed all the omnidirectional guide vanes except 16 increased the static torque and drag coefficients of the swirling savonius rotor.
Study of a Savonius Type Wind Turbines for its Aerodynamic Characteristics
The primary objective of this paper is to conduct a comparative study on the number of blade and different blade angles of a domestic savonius vertical axis wind turbine with semicircular shaped blades under a range of wind speeds. A domestic scale 6bladed Savonius Vertical Axis Wind Turbine was manufactured to investigate the effect of blade number and blade angle on the maximum power generation by the turbine. Maximum power curves as a function of wind speeds were established for each configuration. The results show that the blade angle has positive effect to increase the power output of a Savonius turbine to a significant amount. The most efficient configuration is the 6bladed turbine with an angle of attack of 10°. This configuration generated 27% more power compared to the 0° angle of attack at the wind speed from 10 to 15 km/h.