review · Energies
Renewable energy harvesting equipment is seeing increased research interest to support modern industrial development and reduce reliance on fossil fuels. Among small-scale vertical-axis designs, the Savonius wind turbine is particularly suitable for areas characterised by low wind speeds and high turbulence intensity. Its key benefits include a simple design, good low-speed functionality, and the ability to rotate regardless of wind flow direction. Nevertheless, these turbines suffer from operational challenges, most notably negative torque. This counteracting force occurs when exhaust air interacts with the returning blade, which reduces overall operating efficiency. To address this issue, various optimization methods have focused on adjusting geometric parameters and applying installation augmentation techniques. This review examines these parametric adjustments and power enhancement approaches, while also outlining prospective paths for future investigations into improving turbine performance.
Harnessing wind power in areas with low or turbulent wind resources requires robust and simple technologies. Understanding the engineering adjustments that reduce negative torque can lead to more efficient, reliable vertical-axis turbines, expanding clean energy generation options beyond large-scale wind farms.
The work indicates an early-stage research pathway focused on design reviews and optimization techniques. It could inform wind turbine designers and equipment manufacturers seeking to improve the efficiency of small-scale vertical-axis turbines for turbulent or low-wind environments, though specific deployment timelines and commercial metrics are not detailed.
AI-generated from the published abstract. Always read the original work before citing.
The need to globalize and implement the fourth industrial revolution has led to increased interest in research on renewable energy harvesting equipment. Wind and solar have been the fastest growing sources of energy and have been used to reduce our dependency on fossil fuels for energy. The Savonius wind turbine is an attractive option for regions with high turbulence intensity and low wind speeds due to its advantages over other small-scale vertical-axis wind turbines. These advantages include its simple design, satisfactory performance at lower speeds, and ability to turn independent of the wind flow direction. However, Savonius wind turbines face several challenges. The most significant one being the negative torque generated during operation. This negative torque is caused by the interaction between the exhaust air and the returning blade, thus reducing efficiency, as the turbine has to overcome this additional force. To improve on the efficiency, various assessments and optimization techniques have been employed. These focus on the geometric parameters of the Savonius wind turbine as well as installation augmentation techniques. This article reviews and reports on several combinations of parametric performance-influencing adjustments and power augmentation techniques applied to Savonius wind turbines. The article concludes by proposing future research directions.
This page summarises published work. The authoritative version sits with the publisher.
DOI: 10.3390/en17153708
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