Structural and Aerodynamic Design, Procedure and Analysis of a Small V-shaped Vertical Axis Wind Turbine (original) (raw)
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Design Project: Vertical Axis Wind Turbine
In this project, we were tasked to design a 10KW vertical axis wind turbine (VAWT) with the modification for better performance. We were able to analyse several alternative to the vertical axis wind turbine. The stress simulation, displacement simulation and factor of safety for our selected design are also highlighted in the report. Besides, there were not many publications on the modification on vertical wind turbine, hence we had to design and analyse most of the VAWT design based on our own understanding and guidance from supervisors. The report will also show the procedure done to fabricate the prototype and any further improvements which could be made to our design. The costs of fabrication and feasibility of the modified vertical axis wind turbine will also be included in the report.
Recent Advances in Rotor Design of Vertical Axis Wind Turbines.pdf
The following work represents the most recent advances in design and testing of vertical axis wind turbines (VAWT) rotors. VAWTs have received much attention as of late due to proposed advantages in small scale and off grid wind power generation. Thus, many recent works have surfaced involving analysis, design and optimization of VAWT rotors in order to more efficiently convert wind energy to electricity or other readily usable means. This paper is a collection of most of the recent literature works involving VAWT rotor design and testing, the majority of which published after 2005. We discuss research in the designing of various lift based rotors as well as some drag based rotors, hybrids, and various others. The recent work in this area suggests VAWT capacity could dramatically increase in the near future, and play a vital role in obtaining cleaner, more sustainable energy when global energy demand is increasing at an unprecedented rate.
2019
Vertical axis wind turbines (VAWT) are omnidirectional in nature. Lift type work on the conditions of lift produced on blades. Drag type harness power from wind by the effect of drag force. VAWTs require no yaw mechanism to continuously orient towards the wind direction. This work deals with the review study of vertical axis lift and drag type rotors and identifying various performance parameters to increase the power performance. It is observed that helical rotor has self starting capacity at low wind speeds. The egg beater shape has better stress bearing capacity as compared to other shapes, but generated insufficient torque for self starting nature. Number of blades for optimal performance for tip speed ratios between three to five were adequate when taken as three. Whereas for tip speed ratios less than three, four blades are optimal. For drag type rotors, it has been concluded that helical blades are more inclined towards self starting nature than conventional bucket type shape...
Design and Analysis of Vertical Axis Wind Turbine
With the current surge in fossil fuels prices, needs for cleaner electricity sources, and authorities funding incentives, wind generators have come to be a plausible science for electricity generation. Currently, horizontalaxis wind generators (HAWT) is dominating the market by its giant size and high power generation. However, vertical axis wind turbines (VAWT) are capable of producing a lot of power, and offer many advantages over (HAWT). The most important goal of this project is to design, analyze and fabricate vertical axis wind turbine to operate in low wind velocity condition. Parametric studies are performed by using the software SOLIDWORKS and Stress analysis, vibration analysis and other various analysis is done using CFD. We conclude from the research that the mass moment of inertia is the most dominant sketch parameter when you design wind turbine to work in low wind velocity conditions. PVC pipes are the most affordable and cheap material for making the aero foils at the rural areas for small wind turbines.
Development of the Performance Characteristics of a Vertical Axis Wind Turbine
2019
Performance curves aid in energy assessment and performance monitoring of wind turbines and can be used as a guide for turbine applications where a generic comparison between different types can be made before selection. This study design, build and carried out a performance analysis on a lift-type Vertical Axis Wind Turbine (VAWT). It was discovered that the efficiency of the wind turbine increased with tip speed ratios. A maximum tip speed ratio of 1.08 was achieved under limited wind speeds which meant that the rotational speed of the device was the same as the wind velocity. This occurred for a rotor solidity of 0.51. This implied that the wind turbine operated like a drag type design since these have tip speed ratios less than or equal to 1.
DESIGN & DEVELOPMENT OF VERTICAL AXIS WIND TURBINE
Increasing demand for energy in recent years has seen a rise in development of alternative energy sources. Wind being one of the most abundant and easily available sources is an excellent alternative to conventional energy sources.
Vertical Axis Wind Turbine- Aerodynamic Modelling and its Testing in Wind Tunnel.pdf
This paper presents aerodynamic modelling, fabrication and the performance evaluation of vertical axis wind turbine (VAWT). Aerodynamic modelling of VAWT is designed using software tools by considering NACA0012 airfoil whose chord length is 0.12 m. Aluminum material based light weight 3 bladed practical prototype model of VAWT having rotor diameter and rotor height as 0.36 m and 0.40 m respectively is fabricated. This practical prototype model is tested in subsonic wind tunnel to analyze the performance parameters like power in the wind, mechanical power at turbine shaft, tip speed ratio (TSR) and power coefficient. The rotor is tested under different wind speeds ranging from 4.38 m/s to 22.38 m/s, test results shows the reliable and efficient performance.
Investigating a Modified Vertical Axis Wind Turbine
ERJ. Engineering Research Journal
This investigation aims to analyze experimentally and numerically the performance of the Savonius wind turbine with a modified blade shape/profile. The wind turbine rotor introduced consists of two hook-shaped buckets connected by a Batch/arm with different bucket orientations. Blades of the cross-section with different thicknesses are considered. The simulations are carried out using the three-dimensional incompressible unsteady Reynolds-Average Navier Stokes (RANS) equations along with the RNG k-ε turbulence model. The results indicate that the RNG k-ε turbulence model achieves a good prediction of the rotor performance, in comparison with the literature and the current measurements. Six rotor models are investigated to explore the effect of rotor shape along with blade thickness on the wind turbine performance. It is revealed that the rotor model with a blade thickness of 2 mm and bucket orientation with a parallel armbucket, Model 4, has the best performance among the tested rotors. The static torque shows positive values for all rotor angles with a maximum static torque coefficient of 0.45, which reveals the high starting ability of the present rotor.
Performance Evaluation of the Next Generation of Small Vertical Axis Wind Turbine
The use of renewable energies has been raised, over all with the big machines used in the wind farms. However, the small wind turbine market still has a big gap. The Small Vertical Axis Wind Turbine (VAWT) study aims at fill this gap, developing turbines with ranges between 200W and 500W. These characteristics permit to take advantage of the wind in regions were it has low speed, high turbulence and to be used in autonomous systems. This project will focus the prototype blades fabrication, methodology to analyze the power performance of the VAWT in lab and bench tests with generators.