“…Optimization of the WT performance [11][12][13][14][15][16][17][18] WT health and condition monitoring Aerodynamics in WTs [30,34,[41][42][43][44][45][46] WT power curves [47][48][49][50][51][52][53][54] WT blades [43,[55][56][57] WT control [58][59][60][61][62][63][64] WT installation [65,66] WT life [22,67] WT manufacturing [68,69] Weibull functions in wind sector [70] CFD simulation techniques in WTs [71,72] Wake modeling in WFs [73][74][75][76]…”
Section: Topics Review Articlesmentioning
confidence: 99%
“…The airfoil of these turbines has a large impact on both the power coefficient and starting ability of the rotor. Although significantly less research has been carried out on the airfoil of Darrieus wind rotors than in horizontal axis WTs (HAWT), the review work in [34] provided various theoretical methods, design processes, and their applicability. Design approaches in this area are classified as direct and inverse.…”
Section: Wt Health and Condition Monitoringmentioning
confidence: 99%
“…Chen et al [34] presented different current research approaches in the design of the airfoil for the Darrieus rotors in WTs and also discussed the application of their design processes as the research is not enough in both depth and breadth. In this review, three direct methods were studied in detail, i.e., one inverse method of airfoil design and two inverse methods based on the literature review as shown in Figure 5.…”
For decades of wind energy technology developments, much research on the subject has been carried out, and this has given rise to many works encompassing different topics related to it. As a logical consequence of such a research and editorial activity, state-of-the-art review works have also been published, reporting about a wide variety of research proposals. Review works are particularly interesting documents for researchers because they try to gather different research works on the same topic present their achievements to researchers. They act, in a way, as a guidance for researchers to quickly access the most meaningful works. The proposal of this paper consists of going one step further, and to present a review of state-of-the-art review works on wind-energy-related issues. A classification into several main topics in the field of energy research has been done, and review works that can be classified in all these areas have been searched, analyzed, and commented on throughout the paper.
“…Optimization of the WT performance [11][12][13][14][15][16][17][18] WT health and condition monitoring Aerodynamics in WTs [30,34,[41][42][43][44][45][46] WT power curves [47][48][49][50][51][52][53][54] WT blades [43,[55][56][57] WT control [58][59][60][61][62][63][64] WT installation [65,66] WT life [22,67] WT manufacturing [68,69] Weibull functions in wind sector [70] CFD simulation techniques in WTs [71,72] Wake modeling in WFs [73][74][75][76]…”
Section: Topics Review Articlesmentioning
confidence: 99%
“…The airfoil of these turbines has a large impact on both the power coefficient and starting ability of the rotor. Although significantly less research has been carried out on the airfoil of Darrieus wind rotors than in horizontal axis WTs (HAWT), the review work in [34] provided various theoretical methods, design processes, and their applicability. Design approaches in this area are classified as direct and inverse.…”
Section: Wt Health and Condition Monitoringmentioning
confidence: 99%
“…Chen et al [34] presented different current research approaches in the design of the airfoil for the Darrieus rotors in WTs and also discussed the application of their design processes as the research is not enough in both depth and breadth. In this review, three direct methods were studied in detail, i.e., one inverse method of airfoil design and two inverse methods based on the literature review as shown in Figure 5.…”
For decades of wind energy technology developments, much research on the subject has been carried out, and this has given rise to many works encompassing different topics related to it. As a logical consequence of such a research and editorial activity, state-of-the-art review works have also been published, reporting about a wide variety of research proposals. Review works are particularly interesting documents for researchers because they try to gather different research works on the same topic present their achievements to researchers. They act, in a way, as a guidance for researchers to quickly access the most meaningful works. The proposal of this paper consists of going one step further, and to present a review of state-of-the-art review works on wind-energy-related issues. A classification into several main topics in the field of energy research has been done, and review works that can be classified in all these areas have been searched, analyzed, and commented on throughout the paper.
“…Darrieus rotor, Chen et al [73] c. Tilted axis wind turbine (2) Based on the wind speed or the Reynolds number (Re) at which they operate, they are classified as [72,73] a. Low-speed wind turbine (Re < 10 3 ) b.…”
Among renewable sources of energy, wind is the most widely used resource due to its commercial acceptance, low cost and ease of operation and maintenance, relatively much less time for its realization from concept till operation, creation of new jobs, and least adverse effect on the environment. The fast technological development in the wind industry and availability of multi megawatt sized horizontal axis wind turbines has further led the promotion of wind power utilization globally. It is a well-known fact that the wind speed increases with height and hence the energy output. However, one cannot go above a certain height due to structural and other issues. Hence other attempts need to be made to increase the efficiency of the wind turbines, maintaining the hub heights to acceptable and controllable limits. The efficiency of the wind turbines or the energy output can be increased by reducing the cut-in-speed and/or the rated-speed by modifying and redesigning the blades. The problem is tackled by identifying the optimization parameters such as annual energy yield, power coefficient, energy cost, blade mass, and blade design constraints such as physical, geometric, and aerodynamic. The present paper provides an overview of the commonly used models, techniques, tools and experimental approaches applied to increase the efficiency of the wind turbines. In the present review work, particular emphasis is made on approaches used to design wind turbine blades both experimental and numerical, methodologies used to study the performance of wind turbines both experimentally and analytically, active and passive techniques used to enhance the power output from wind turbines, reduction in cut-in-speed for improved wind turbine performance, and lastly the research and development work related to new and efficient materials for the wind turbines.
“…Considering costs of test equipment and prototypes, Computational Fluid Dynamics (CFD) methods are often rather used to analyze performance of wind rotor than wind tunnel tests. The applicability of Darrieus airfoil's design processes was discussed, especially for the approaches based on Panel and the CFD method [10]. Based on research results of scholars, we propose a novel type of VAWT wind rotor to improve the flow field and wind energy utilization, which is named as Fish-ridged vertical axis wind rotor.…”
Geometrical shape of a vertical axis wind turbine (VAWT) is composed of multiple structural parameters. Since there are interactions among the structural parameters, traditional research approaches, which usually focus on one parameter at a time, cannot obtain performance of the wind turbine accurately. In order to exploit overall effect of a novel VAWT, we firstly use a single parameter optimization method to obtain optimal values of the structural parameters, respectively, by Computational Fluid Dynamics (CFD) method; based on the results, we then use an orthogonal analysis method to investigate the influence of interactions of the structural parameters on performance of the wind turbine and to obtain optimization combination of the structural parameters considering the interactions. Results of analysis of variance indicate that interactions among the structural parameters have influence on performance of the wind turbine, and optimization results based on orthogonal analysis have higher wind energy utilization than that of traditional research approaches.
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