Numerical Investigation of a New Modified Savonius Wind Turbines

Mrigua, Khalid; Zemamou, M.; Aggour, M.

doi:10.14710/ijred.2022.45799

Cited by 2 publications

(2 citation statements)

References 45 publications

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“…Wind power is captured by wind turbines and converting it to electricity. Wind power is the fastest-growing energy sector in the world because of its many advantages, such as unlimited, free, renewable resources, economic value, maintenance cost, and placement of wind harvesting facilities [9]. Unlike traditional power plants, harvesting wind power is a clean, non-polluting way to generate electricity and emits no greenhouse gases.…”

Section: Wind Energymentioning

confidence: 99%

A Comparative Review of the Lubrication of Bearings in Wind Turbines and Spacecraft to Address Wind Turbine Bearing Failures

Sathyan¹

2023

Tribol. Ind.

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Wind turbines have improved in terms of reliability over the past ten years, but they still experience crucial and expensive tribological issues that shorten their intended lifespans. Most turbines require significant repairs or complete replacements of the tribo components in the 5-to 7-year range. The pricey gearboxes have high repair rates, which greatly raises the operating costs for wind turbines and the cost of wind energy. Currently, various bearings in the turbine are lubricated by automatic lubrication systems with the necessary oil filters to ensure cleanliness. The commonly used lubrication methods for wind turbine bearings are centralized lubrication, oil-air lubrication, oil mist lubrication, and oil bath lubrication. There are similarities between wind turbines and spacecraft-moving mechanical systems. Most spacecraft are designed to work for decades in a remote environment without periodic maintenance. Spacecraft use efficient lubrication systems for their moving mechanical systems to provide the required lubricant to the bearings for the required life. Depending on the lubrication requirements, proven active and passive lubrication systems are employed in spacecraft. This paper reviews the lubrication issues of the wind turbine in comparison with the spacecraft and proposes a few lubrication systems that are successfully performing in spacecraft, intending to improve the reliability of wind turbine tribo-systems.

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Section: Wind Energymentioning

confidence: 99%

A Comparative Review of the Lubrication of Bearings in Wind Turbines and Spacecraft to Address Wind Turbine Bearing Failures

Sathyan¹

2023

Tribol. Ind.

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“…Likewise, a number of researchers have made contributions through their experimental research 16 . M. Zemamou et al, 18 reported their investigation focused at improving the Cp of Savonious rotor, while Arifin Sanusi et al, 17 investigated combination of the circle-shaped with a concave elliptical model to improve the performance. In two new possible areas, namely far offshore and in urban and rural settings, VAWT has recently experienced resurgence in demand for wind energy harvesting.…”

Section: Background and Literature Reviewmentioning

confidence: 99%

Numerical Investigation on Aerodynamic Performance of Helical Savonius Rotor Inspired by Natural Shapes

Bagade,

Chaudhari

et al. 2023

jmmf

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There have been extensive studies conducted on Horizontal Axis Wind Turbines (HAWT) at relatively moderate to high wind speed regions. However, such detailed investigations for Vertical Axis Wind Turbines (VAWT), specifically for low wind speed terrains are amply reported. This motivates us to conduct research to explore possibilities in improving performance of VAWT in low wind speed terrains, which is attempted in the present work. This is required due to the fact that most of regions do not have sufficient extractable wind energy due to low speeds. VAWTs can perform at such low wind speed, but are less efficient. Improving efficiency of VAWT will solve the purpose. Hence, the present study is aimed at finding the performance characteristics of VAWT for low Wind speed configurations. Various parameters affecting power generation are investigated. Numerical analyses on various configurations are conducted to study the effects of twist angle, free stream velocity, number of blades. Computational results obtained have been in good agreement with the established results for semi-circular Savonius rotor profile. The results suggest that for low wind speed terrains, there is a need to explore the combination of lift and drag type of profiles, which could be used for the utilization of available wind power. Hence, naturally inspired shapes (profiles) were investigated for the possible solution of combined lift and drag type wind turbines at low speeds. The blade shape for such combined lift and drag type wind turbine were deduced from the available literature. It is well established that the naturally inspired shapes as noted in sea conch follow golden ratio in its contours. The present study provides an insight on the characteristic curves of VAWT for low wind speed terrains, effects of various geometric and flow parameters suitable for low wind speed terrains.

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Numerical Investigation of a New Modified Savonius Wind Turbines

Cited by 2 publications

References 45 publications

A Comparative Review of the Lubrication of Bearings in Wind Turbines and Spacecraft to Address Wind Turbine Bearing Failures

A Comparative Review of the Lubrication of Bearings in Wind Turbines and Spacecraft to Address Wind Turbine Bearing Failures

Numerical Investigation on Aerodynamic Performance of Helical Savonius Rotor Inspired by Natural Shapes

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