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A.A. AbdEL-hamid

Bio: A.A. AbdEL-hamid is an academic researcher. The author has contributed to research in topics: Rotor (electric) & Wind direction. The author has an hindex of 2, co-authored 2 publications receiving 169 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, three methods of controlling the wind direction were proposed aiming at improving the performance of Savonius rotor, which achieved a power-coefficient peak of 0.52 with operation range of tip speed ratio λ ≤ 2.2.

125 citations

Journal ArticleDOI
TL;DR: In this article, an aerodynamic performance of stationary and rotating Savonius rotor for various overlap ratios is numerically analyzed using four turbulence models, and the simulation is compared with the present and published experimental results to determine the suitable turbulence model.

114 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors highlight some of the major developments of VAWTs, with a focus on the integration with urban infrastructure, and draw several recommendations based on the state-of-the-art information on the subject for future studies and acceptance of wind turbines in the urban areas.
Abstract: Wind energy is one of the most promising renewable energy resources for power generation, and rapid growth has been seen in its acceptance since 2000. The most acceptable classification for wind turbines is by its axis of orientation: Horizontal Axis Wind Turbines (HAWT) and Vertical Axis Wind Turbines (VAWT). HAWTs are used in many countries for medium-to-large scale power projects, and most commercial installations around the globe are solely based on these turbines. On the other hand, HAWTs are not recognized as a viable option to harness the energy of the wind in urban areas, where the wind is less intense, much more chaotic and turbulent. VAWTs are suggested as a better choice for cities and isolated semi-urban areas. Several attributes have been suggested for the large-scale deployment of VAWTs, e.g., good performance under the weak and unstable wind, no noise and safety concerns, and aesthetically sound for integration in urban areas. Significant research has been published on wind turbine technology and resources assessment methodologies, and this review paper is a modest attempt to highlight some of the major developments of VAWTs, with a focus on the integration with urban infrastructure. Several recommendations have been drawn based on the state-of-the-art information on the subject for future studies and acceptance of wind turbines in the urban areas. It was concluded that further research is critical in making VAWTs a viable, dependable, and affordable power generation technology for many low and decentralized power applications.

168 citations

Journal ArticleDOI
TL;DR: In this paper, the authors extensively review various flow augmentation systems and attempts to provide information to researchers on current augmentation techniques and other relevant research, which is able to increase the coefficient of power, CP, hence improving the output power of different types of VAWTs.
Abstract: There are many advantages of vertical axis wind turbines (VAWTs) compared with horizontal axis wind turbines (HAWTs). Research has shown that VAWTs are more suitable for turbulent wind flow and urban applications. However, the efficiency and low self-start ability of VAWTs are always the main drawbacks especially for the lift-type VAWTs. Unlike HAWTs, the rotor blades for VAWTs do not always provide positive torque during operation. Many innovative designs have been implemented to improve the performance of VAWTs, and this includes different configurations and blade profiles. This paper extensively reviews various flow augmentation systems and attempts to provide information to researchers on current augmentation techniques and other relevant research. The flow augmentation system is able to increase the coefficient of power, CP, hence improving the output power of different types of VAWTs. Some augmentation systems are able to increase the maximum power output by up to 910%. The methods and designs used to increase upwind velocity and to reduce negative torque created on the wind turbine have been discussed in detail. Additionally, the flow augmentation devices that are integrated with building structures are also reported in this paper.

127 citations

Journal ArticleDOI
TL;DR: In this paper, a modified Savonius rotor with different convex and concave sides is optimized to maximize the power efficiency, and a particle swarm optimization (PSO) algorithm is applied to find the optimal design based on the response surface model.

127 citations

Journal ArticleDOI
TL;DR: In this paper, three methods of controlling the wind direction were proposed aiming at improving the performance of Savonius rotor, which achieved a power-coefficient peak of 0.52 with operation range of tip speed ratio λ ≤ 2.2.

125 citations

Journal ArticleDOI
TL;DR: In this paper, a CFD study is conducted in order to characterize the dynamic behavior of a Savonius vertical axis wind turbine, which is executed using the open source code, OpenFOAM.

114 citations