Efficiency comparison of horizontal axis wind turbines and bladeless turbines

Bardakjian, Antranig Tony; Mandadakis, Paul Pavlos; Tingle, Amy

doi:10.5130/pamr.v4i0.1461

Cited by 9 publications

(4 citation statements)

References 8 publications

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“…BWT technology remains in the developmental phase and is characterized by the challenges associated with emerging technologies. In [43], a comparative study between BWTs and traditional horizontal axis wind turbines (HAWTs) reveals distinct advantages and limitations of each technology. As an example of the limitations of BWTs, these show an efficiency (power usage to power output ratio) of 70%, while HAWTs reach 80% efficiency.…”

Section: Discussionmentioning

confidence: 99%

Optimizing Bladeless Wind Turbines: Morphological Analysis and Lock-In Range Variations

González-González,

Yáñez,

Del Pozo

et al. 2024

Applied Sciences

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This study presents a comprehensive exploration centred on the morphology and surface structure of bladeless wind turbines (BWTs) aimed at optimizing their wind energy harvesting capability. Unlike conventional wind technology where vortex-induced vibration (VIV) is seen as problematic due to aeroelastic resonance, this effect becomes advantageous in BWT energy harvesters, devoid of frictional contact or gears. The primary objective of this study is to develop an optimal BWT design for maximizing energy output. Specifically, this study delves into optimizing the energy performance of these VIV wind energy harvesters, investigating how the geometry (shape and roughness) influences their operating range, known as Lock-In range. The results demonstrate how variations in geometry (convergent, straight, or divergent) can shift the Lock-In range to different Reynolds numbers (Re), modelled by the equation: Re (max Lock-In) = 0.30 α + 4.06. Furthermore, this study highlights the minimal impact of roughness within the considered test conditions.

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Section: Discussionmentioning

confidence: 99%

Optimizing Bladeless Wind Turbines: Morphological Analysis and Lock-In Range Variations

González-González,

Yáñez,

Del Pozo

et al. 2024

Applied Sciences

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“…The bladeless turbines, which generate electricity by vibrating mechanisms, are still under development and are a little bit unknown. Notwithstanding they have low power efficiency, they are cost-efficient [42]. Some turbines do not fit into the above categories; for instance, IN-VELOX, IMPLUX, Cooling tower updraft, and Kite that do not have a rotating axis, and O-Wing that has a variable rotating axis.…”

Section: Classification Of Wtsmentioning

confidence: 99%

A Comprehensive Review on Development and Applications of Cross-Flow Wind Turbines

2023

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The rapid globalization of the energy crisis and the adverse effects of global warming have caused the need for non-conventional energy resources to be felt more than ever. As a result of this, vertical axis wind turbines (VAWT) have received much attention over the recent decades, and have thus been more developed and used worldwide. The cross-flow wind turbine (CFWT) is a wind turbine in the category of VAWTs, and perfectly suitable for urban applications due to its simplicity, high starting torque at low wind speed, and self-starting capability, even though its low power coefficient as its main drawback has slowed down its widespread use so far. The main aim of this paper is to review the scientific literature and recent developments in the field of CFWTs. The governing equations and turbulence models for the simulation of the turbine are discussed and various wind resource assessment methods for estimating potential site locations, different aspects, and wind energy harvesting systems from buildings are debated. The research gaps, challenges, and future possible works on such turbines and their applications are discussed. Investigations indicate that changing the rotor geometric parameters and adding innovative augmentation devices have been the most widely addressed approaches for making performance enhancement of the wind turbine in the literature. The critical performance-affecting parameters are improved by various innovative designs of the turbine structure or blades, as well as several augmentation techniques, such as guide nozzle, casing, windshield, guide vane, deflector, cowling, etc.

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“…The rotational wind harvesting involves the traditional large-span blades that rotate and generate electricity at varying wind speeds, such as the traditional horizontal axis wind turbines, and the vertical axis wind turbine, which has been previously researched numerically by Pervaiz et al [13] to optimized it and to understand its performance under different conditions, but the fact remains that these two configurations require sufficient wind speeds to operate. However, oscillation wind harvesting has been studied for the past couple of years [14][15][16]. In this method, a small wind gust flowing over a body is disturbed by the body creating turbulence downstream.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Study of Novel Vortex Bladeless Wind Turbine with an Economic Feasibility Analysis and Investigation of Environmental Benefits

Hamdan,

Dol,

Gomaa

et al. 2023

Energies

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This study combines experimental and numerical evaluations of Vortex Bladeless Wind Turbines (VBWTs) to understand their potential in renewable energy generation. The methodology employs Two-Way Fluid–Solid Interface (FSI) simulations, alongside real-world data, providing important insights into the turbine’s vibration dynamics and flow interactions during operation. Key findings include identifying optimal vibration frequencies and amplitudes that enhance energy harvesting and a clear advantage in power-generation estimations shown by one of the models used. The study reveals possible applications of VBWT in various settings like airport runways, highways, and buildings, indicating a promising avenue for incorporating such renewable-energy solutions. Discussions on the economic feasibility and environmental benefits of VBWT deployment are also presented, suggesting a need for further research and optimization in this area. A conceptual generator design and business model are introduced as part of a broader discussion on technology integration and energy storage. The research in this study encompasses experimental and numerical analysis, to achieve a broader understanding of the workings of a VBWT, realizing the feasibility of using such systems in lower-wind-speed conditions and upscaling to higher-wind-speed cases.

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Efficiency comparison of horizontal axis wind turbines and bladeless turbines

Cited by 9 publications

References 8 publications

Optimizing Bladeless Wind Turbines: Morphological Analysis and Lock-In Range Variations

Optimizing Bladeless Wind Turbines: Morphological Analysis and Lock-In Range Variations

A Comprehensive Review on Development and Applications of Cross-Flow Wind Turbines

Experimental and Numerical Study of Novel Vortex Bladeless Wind Turbine with an Economic Feasibility Analysis and Investigation of Environmental Benefits

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