Influence of the deflector plate on the performance of modified Savonius water turbine
TL;DR: In this paper, the optimal position of the deflector plate upstream to the water flow was investigated to find out the maximum power generated by a Savonius rotor with water as the working medium at a Reynolds number of 1.32 × 10 5.
About: This article is published in Applied Energy.The article was published on 2011-09-01. It has received 241 citations till now. The article focuses on the topics: Water flow & Rotor (electric).
Citations
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TL;DR: In this article, a two-bladed turbine is tested in an open type test section and its performance is assessed in terms of power and torque coefficients, and the effects of Reynolds number on the dynamic and static characteristics are also discussed.
209 citations
TL;DR: In this article, the current status of micro-hydrokinetic river (MHR) technology for rural applications is reviewed based on developments, applications, design, operation as well as different MHR technologies involved in rural electrification projects.
Abstract: Apparently, most hydrokinetic literatures mainly concentrate on large-scale technologies such as waves, tides and ocean current applications. This could be one of the reasons delaying the utilization of small-scale hydrokinetic river technology in rural areas. This paper therefore critically reviews the current status of micro-hydrokinetic river (MHR) technology for rural applications. Relevant research literatures based on developments, applications, design, operation as well as different MHR technologies involved in rural electrification projects have been reviewed. After conducting these reviews it has become clear that one of the key barriers hindering the employment of MHR technology in rural areas with access to flowing water is the lack of research demonstrating the technical, economic and environmental benefits of this technology compared to other rural electrification techniques. Studies that look towards the long-term perspective of techno-economic analysis inclusive of capital, maintenance and running costs computations need to be carried out promoting the interest in utilizing this technology. This paper will aid researchers to identify areas that need to improve as well as encourage public bodies to implement proper energy policies regarding the MHR technology usage in rural areas. It will also create awareness among site owners, investors, project developers and decision makers regarding the potential benefits of using this technology in rural areas especially in countries with little or no elevation.
186 citations
TL;DR: In this article, the authors classified vortex-induced motion phenomena into several groups which include Flutter, Transverse and Torsional Galloping, Buffeting, Vortex-Induced Vibration (VIV), and Fluttering-Autorotation.
Abstract: Vortex-induced motions are generally known as destructive phenomena for engineering structures. Nevertheless, they have a positive effect which is their great potential to extract renewable energy from the fluid flow. The phenomenology of vortex-induced motions has been studied and several energy harvesting technologies based on these motions have been reported, separately through literature. However, a comprehensive study that bonds together the phenomenology and the energy extraction technologies does not exist yet. Now that this area has become well established, classification of the relevant phenomena and technologies has become necessary as well. The present paper has two main objectives; The first objective is to classify the whole vortex-induced motion phenomena into several groups which include Flutter, Transverse and Torsional Galloping, Buffeting, Vortex-Induced Vibration (VIV), and Fluttering-Autorotation. The second objective is to review the literature, with the aim of classifying different technologies of renewable energy harvesting based on vortex-induced motion. Also, the performance characteristics and economical costs of these technologies are benchmarked.
177 citations
TL;DR: Compared to the wind turbine with semicircular blades, the Savonius turbine with optimal blades and a tip speed ratio (TSR) of 0.8 achieved significant improvement on the time-averaged power coefficient, suggesting that the Sav onius wind turbine has great potential to be applied in the real urban environment.
147 citations
TL;DR: In this article, the authors evaluate how the conventional Savonius wind turbine performs when it rotates by the momentum of water current at low velocity from 0.3 m/s to 0.9m/s in an open water channel.
133 citations
References
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TL;DR: The material presented in this paper covers the method of describing the uncertainties in an engineering experiment and the necessary background material, as well as a technique for numerically executing uncertainty analyses when computerized data interpretation is involved.
6,868 citations
"Influence of the deflector plate on..." refers methods in this paper
...Uncertainty calculations are carried out based on Moffat [19]....
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TL;DR: A review of the existing and upcoming conversion schemes, and their fields of applications are outlined in this article, based on a comprehensive survey of various hydrokinetic systems reported to date, general trends in system design, duct augmentation, and placement methods are deduced.
718 citations
"Influence of the deflector plate on..." refers background in this paper
...Literature suggests that there is a gaining of popularity for water turbines [3–5]....
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TL;DR: In this paper, the authors have investigated these kinds of hydrokinetic energy technologies, and given some detailed information about current base of Hydrokinetic, and tried to give some knowledge in order to familiarize with the hydro-kinetic turbine and generator, the selection information of a suitable turbine has been mentioned.
Abstract: The growing demand for electrical energy is one of the most important subjects today. Decreasing amount and environmental effect of fossil fuels does not seem to surmount this challenge. Renewable energies give a good perspective to be an alternative to fossil and nuclear-fueled power plants, in order to meet growing demand for electrical energy. Hydropower is well known in this category. Hydrokinetic energy technologies are relatively new than other hydropower systems. In this work has been investigated these kinds of hydrokinetic energy, and given some detailed information about current base of hydrokinetic. It has tried to give some knowledge in order to familiarize with the hydrokinetic turbine and generator. The selection information of a suitable turbine has been mentioned.
318 citations
"Influence of the deflector plate on..." refers background in this paper
...Literature suggests that there is a gaining of popularity for water turbines [3–5]....
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TL;DR: In this article, the effect of geometrical parameters on the performance of the rotors in terms of coefficient of static torque, coefficient of torque and coefficient of power was investigated in an open jet wind tunnel.
295 citations
"Influence of the deflector plate on..." refers background or methods in this paper
...[18] investigated the performance of modified forms of conventional rotors with and without central shaft between the end plates....
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...(b) Geometrical parameters of modified Savonius rotor [18]....
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...Top view of modified Savonius rotor without shaft in between the end plates [18]....
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...Best configuration of modified Savonius rotor (without shaft) is considered for the present work [18]....
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...3 and 4 show the basic modified Savonius rotor without shaft used in the present study and the isometric view of the modified Savonius rotor [18]....
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TL;DR: River current energy conversion systems (RCECS) are electromechanical energy converters that convert kinetic energy of river water into other usable forms of energy as mentioned in this paper. But, the potentials of this technology as an effective source of alternative energy have not yet been explored to a great extent.
Abstract: River current energy conversion systems (RCECS) are electromechanical energy converters that convert kinetic energy of river water into other usable forms of energy. Over the last few decades, a number of reports on technical and economic feasibility of this technology have emerged. However, the potentials of this technology as an effective source of alternative energy have not yet been explored to a great extent. The underlying challenges of system design, operation and economics also lack proper understanding. In this article, starting with a definition of the RCECS, an overview of the technological advancements in the relevant field is provided. From a system engineering perspective, various merits and prospects of this technology along with pertinent challenges are discussed. The cross-disciplinary nature of approaching these challenges with an emphasis on the need for contributions from various technical and non-technical domains are also outlined in brief. This article may serve as a coherent literature survey or technology review that would provide better understanding of the subjacent issues and possibly rejuvenate research interest in this immensely potential field of energy engineering.
226 citations
"Influence of the deflector plate on..." refers background in this paper
...in Ontario has developed vertical axis turbines specifically meant to harness the water energy from river [2]....
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