Vertical axis wind turbine – A review of various configurations and design techniques

Bhutta, Muhammad Mahmood Aslam; Hayat, Nasir; Farooq, Ahmed Uzair; Ali, Zain; Jamil, Sh. Rehan; Hussain, Zahid

doi:10.1016/j.rser.2011.12.004

Cited by 434 publications

(96 citation statements)

References 42 publications

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“…High-speed rotating vortices gradually separate from the advancing blade at about 135°, as shown in Figure 17d. The overlap ratio and the spacing have a significant impact on the performance of the Savonius turbines [4,29]. The optimization objective is the shape of blade in this paper, so other design variables (for instance, overlap ratio) are not analyzed in detail.…”

Section: Flow Structurementioning

confidence: 99%

A Novel Parametric Modeling Method and Optimal Design for Savonius Wind Turbines

et al. 2017

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Abstract:Under the inspiration of polar coordinates, a novel parametric modeling and optimization method for Savonius wind turbines was proposed to obtain the highest power output, in which a quadratic polynomial curve was bent to describe a blade. Only two design parameters are needed for the shape-complicated blade. Therefore, this novel method reduces sampling scale. A series of transient simulations was run to get the optimal performance coefficient (power coefficient C p ) for different modified turbines based on computational fluid dynamics (CFD) method. Then, a global response surface model and a more precise local response surface model were created according to Kriging Method. These models defined the relationship between optimization objective C p and design parameters. Particle swarm optimization (PSO) algorithm was applied to find the optimal design based on these response surface models. Finally, the optimal Savonius blade shaped like a "hook" was obtained. C m (torque coefficient), C p and flow structure were compared for the optimal design and the classical design. The results demonstrate that the optimal Savonius turbine has excellent comprehensive performance. The power coefficient C p is significantly increased from 0.247 to 0.262 (6% higher). The weight of the optimal blade is reduced by 17.9%.

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Section: Flow Structurementioning

confidence: 99%

A Novel Parametric Modeling Method and Optimal Design for Savonius Wind Turbines

et al. 2017

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“…In comparison, VAWTs present several important advantages including the following: (1) their blades can increase in size and be manufactured less expensively since they can be built from several sections and attached to the main hub at several points; (2) since the axis of rotation is vertical, VAWTs can operate with the same efficiency with winds from any direction (omni‐directional) and are thus more suitable for locations with variable winds such as over complex terrain or near shores where the land and sea breeze cycle shifts the wind direction rapidly at sunrise and sunset; (3) their optimal performance is at a lower tip speed ratio than HAWTs, and consequently, they have lower environmental impacts on ecological systems (e.g. birds) and result in lower noise pollution; and (4) the vertical rotation axes allow the electric generators to be placed at the bottom of the tower, making both construction and maintenance of such turbines easier and less expensive. Since the installation and foundation costs are a large fraction of the total cost of aeolic power plants, VAWTs may offer an appealing economic advantage, particularly for offshore farms.…”

Section: Introductionmentioning

confidence: 99%

Simulation and wake analysis of a single vertical axis wind turbine

et al. 2016

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Because of several design advantages and operational characteristics, particularly in offshore farms, vertical axis wind turbines (VAWTs) are being reconsidered as a complementary technology to horizontal axial turbines. However, considerable gaps remain in our understanding of VAWT performance since cross‐flow rotor configurations have been significantly less studied than axial turbines. This study examines the wakes of VAWTs and how their evolution is influenced by turbine design parameters. An actuator line model is implemented in an atmospheric boundary layer large eddy simulation code, with offline coupling to a high‐resolution blade‐scale unsteady Reynolds‐averaged Navier–Stokes model. The large eddy simulation captures the turbine‐to‐farm scale dynamics, while the unsteady Reynolds‐averaged Navier–Stokes captures the blade‐to‐turbine scale flow. The simulation results are found to be in good agreement with three existing experimental datasets. Subsequently, a parametric study of the flow over an isolated VAWT, carried out by varying solidities, height‐to‐diameter aspect ratios and tip speed ratios, is conducted. The analyses of the wake area and velocity and power deficits yield an improved understanding of the downstream evolution of VAWT wakes, which in turn enables a more informed selection of turbine designs for wind farms. Copyright © 2016 John Wiley & Sons, Ltd.

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“…They are both being currently used worldwide. Wind energy is proved to be an economically acceptable and reliable source of energy [1]. The generation of wind power has an edge over other renewable energy technologies because of its simple infrastructure, technological maturity, and low-cost energy generation.…”

Section: Introductionmentioning

confidence: 99%

Feasibility of a 100 MW Installed Capacity Wind Farm for Different Climatic Conditions

et al. 2018

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Wind power is the world's fastest-growing energy source. More power can be generated from wind energy through the use of new wind machine designs and techniques. The objective of the present work is to encourage people and governments to develop wind energy-based power plants to achieve sustainable energy infrastructures, especially in developing countries. In this paper, a feasibility study of a 100 MW grid-connected wind farm is conducted for five different cities of Saudi Arabia (KSA). The results indicate that the proposed power plant is feasible both technically and economically. All sites are found to be within the profitable range with Dhahran being the most feasible site among the others for the installation of the wind farm. A sensitivity analysis has also been carried out to find out the effects of different incentives on the payback period of the project.

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Vertical axis wind turbine – A review of various configurations and design techniques

Cited by 434 publications

References 42 publications

A Novel Parametric Modeling Method and Optimal Design for Savonius Wind Turbines

A Novel Parametric Modeling Method and Optimal Design for Savonius Wind Turbines

Simulation and wake analysis of a single vertical axis wind turbine

Feasibility of a 100 MW Installed Capacity Wind Farm for Different Climatic Conditions

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