Optimization of slot parameters for performance enhancement of slotted Savonius hydrokinetic turbine using Taguchi analysis

IF 9 1区工程技术 Q1 ENERGY & FUELS Renewable Energy Pub Date : 2024-10-17 DOI:10.1016/j.renene.2024.121608

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Abstract

Hydrokinetic technology is an innovative approach to generate sustainable energy from river systems by using the kinetic energy of free-flowing water. To utilize such energy hydrokinetic turbines are being employed to harness the kinetic energy from flowing water. In this paper, a CFD study has been carried out to improve the efficiency of the Savonius turbine with the application of proposed slotted blades and validated with the experimental study. Also, this study aims for the optimization of a slotted blade Savonius hydrokinetic turbine (SHT) performance by examining different design parameters and their relationship using the Taguchi method. This study reveals that slot gap (y) has the greatest influence on turbine performance, followed by slot shape factor (ε), slot position (f), and tip speed ratio (λ). Moreover, the optimal combination of four parameters for maximising the efficiency of the slotted SHT is y = 1.5 mm, ε = 0.6, f = 1 % of blade diameter, and λ = 0.7 based on signal-to-noise (S/N) ratio. At this optimum combination of slotted blade profile, performance of slotted blade SHT increases by 45.19 % compared to conventional SHT. There is a slight difference of 4.16 % between experimental and computational results obtained for optimum Taguchi design.

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利用田口分析法优化开槽参数，提高开槽萨沃尼水轮机的性能

水动力技术是一种利用自由流动的水的动能从河流系统中产生可持续能源的创新方法。为了利用这种能源，人们正在使用水动力涡轮机来利用流水的动能。本文进行了 CFD 研究，以提高萨沃尼乌斯涡轮机的效率，同时应用了建议的开槽叶片，并与实验研究进行了验证。此外，本研究还采用田口方法检查了不同的设计参数及其关系，旨在优化开槽叶片萨沃尼乌斯水动能涡轮机（SHT）的性能。研究发现，槽间隙（y）对涡轮机性能的影响最大，其次是槽形系数（ε）、槽位（f）和叶尖速度比（λ）。此外，根据信噪比（S/N），使开槽 SHT 效率最大化的四个参数的最佳组合为 y = 1.5 mm，ε = 0.6，f = 叶片直径的 1%，λ = 0.7。在此最佳开槽叶片轮廓组合下，开槽叶片 SHT 的性能比传统 SHT 提高了 45.19%。最佳田口设计的实验结果与计算结果之间存在 4.16% 的微小差异。

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来源期刊

Renewable Energy 工程技术-能源与燃料

CiteScore

18.40

自引率

9.20%

发文量

1955

审稿时长

6.6 months

期刊介绍： Renewable Energy journal is dedicated to advancing knowledge and disseminating insights on various topics and technologies within renewable energy systems and components. Our mission is to support researchers, engineers, economists, manufacturers, NGOs, associations, and societies in staying updated on new developments in their respective fields and applying alternative energy solutions to current practices. As an international, multidisciplinary journal in renewable energy engineering and research, we strive to be a premier peer-reviewed platform and a trusted source of original research and reviews in the field of renewable energy. Join us in our endeavor to drive innovation and progress in sustainable energy solutions.