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Journal ArticleDOI

Power prediction formula for blade design and optimization of Dual Darrieus Wind Turbines based on Taguchi Method and Genetic Expression Programming model

01 Jun 2022-Renewable Energy-Vol. 192, pp 583-605
TL;DR: In this paper , a power prediction formula CP=f(Δ,β,θ), containing radius difference Δ, chord ratio β, and offset angle θ, is proposed.
About: This article is published in Renewable Energy.The article was published on 2022-06-01. It has received 4 citations till now. The article focuses on the topics: Taguchi methods & Offset (computer science).
Citations
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Journal ArticleDOI
TL;DR: In this article , a novel U-type Darrieus wind turbine (UDWT) is proposed by using machine learning (ML) method based on BPNN and three optimization algorithms, GA, PSO and SA, are adopted.

4 citations

Journal ArticleDOI
TL;DR: In this paper , two surrogate models, i.e., Kriging and artificial neural networks (ANN), were adopted for the performance prediction of a twin-VAWT with a close staggered arrangement.

2 citations

Journal ArticleDOI
TL;DR: In this article , a vibration stand was used to test fatigue and crack resistance of turbine elements with a horizontal axis of rotation of the water station and the operating frequency range of the shaker was within 5-5000 Hz, and the temperature values were -60...60 oС (213...333 K).
Abstract: The article is devoted to improving the efficiency of water supply and watering animals in pastures and walking areas by optimizing the design and technological parameters of wind water stations. In the main studies of technologies and technical means the wind water stations are analyzed and it is revealed that wind energy in mechanical installations (mills, water pumps) has been used for several centuries. It has been established that the actual direction of increasing the efficiency of water wind stations is to protect the blades from destruction by very strong gusts of wind. A vibration stand was used to test fatigue and crack resistance of turbine elements with a horizontal axis of rotation of the water station. The operating frequency range of the shaker was within 5-5000 Hz, and the temperature values were -60...60 oС (213...333 K). The influence of operational defects on fatigue was studied on materials of different classes: DIT aluminum alloy and VT6S titanium alloy. The characteristics of crack resistance and endurance of the material of the blades is determined at different temperatures and asymmetry load cycle. It has been established that lowering the temperature increases the resistance to the tedious destruction of experimental materials, so that these phenomena manifest themselves in different ways. The DIT alloy is more sensitive to the effects sub-zero temperatures, according to the characteristics of crack resistance, than VT6S. For VT6S alloys, a decrease in temperature from 60 °C to -60 °C leads to minor changes in the threshold stress intensity factors and crack growth rate, while for FIT the thresholds increase by 3...4 times, and the crack growth rate decreases by 1...2 orders. For VT6S alloys, there is a slight decrease in fracture toughness with decreasing the temperature, however, at high temperatures, the crack resistance values are at a high level and are several times higher than those of DIT.
Journal ArticleDOI
TL;DR: In this paper , an effective optimization approach combining computational fluid dynamics (CFD) modeling and the Taguchi method, was presented to evaluate C5 sugar acid fermentation in a gas-liquid stirred tank bioreactor.
References
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Journal ArticleDOI
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

Journal ArticleDOI
TL;DR: In this article, the authors reviewed various configurations of VAWT along with their merits and demerits and found that coefficient of power for various configurations is different and can be optimized with reference to Tip Speed Ratio.
Abstract: Increased concern for environment has led to the search for more environment friendly sources of energy. Wind energy can be a viable option in this regard. Vertical axis wind turbines offer promising solution for areas away from the integrated grid systems. However, they have certain drawbacks associated with different configurations. This paper reviews various configurations of VAWT along with their merits and demerits. Moreover, design techniques employed for VAWT design have also been reviewed along with their results. It was learned that coefficient of power (CP) for various configurations is different and can be optimized with reference to Tip Speed Ratio. Latest emerging design techniques can be helpful in this optimization. Furthermore, flow field around the blade can also be investigated with the help of these design techniques for safe operation.

413 citations

Journal ArticleDOI
TL;DR: In this paper, the performance, blade design, control and manufacturing of horizontal axis and vertical axis wind turbines are reviewed based on experimental and numerical studies and lessons learnt from various studies/countries on actual installation of small wind turbines were presented.
Abstract: Meeting future world energy needs while addressing climatic changes has led to greater strain on conventional power sources. One of the viable sustainable energy sources is wind. But the installation large scale wind farms has a potential impact on the climatic conditions, hence a decentralized small scale wind turbines is a sustainable option. This paper presents review of on different types of small scale wind turbines i.e., horizontal axis and vertical axis wind turbines. The performance, blade design, control and manufacturing of horizontal axis wind turbines were reviewed. Vertical axis wind turbines were categorized based on experimental and numerical studies. Also, the positioning of wind turbines and aero-acoustic aspects were presented. Additionally, lessons learnt from various studies/countries on actual installation of small wind turbines were presented.

383 citations

Journal ArticleDOI
TL;DR: In this paper, the position of an obstacle shielding the returning blade of the Savonius turbine and possibly leading to a better flow orientation toward the advancing blade is optimized. And the optimization process takes into account the output power coefficient as target function, considers the position and the angle of the shield as optimization parameters, and relies on Evolutionary Algorithms.

206 citations

Journal ArticleDOI
TL;DR: In this article, the development of the near wake of a vertical axis wind turbine is investigated by stereoscopic particle image velocimetry in an open-jet wind tunnel on an H-shaped rotor, operated at a tip speed ratio of 4.5 and an average chord-based Reynolds number of 1.7 × 10 5.

199 citations