Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 85 for “"vertical axis"”.
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Vertical Axis Hybrid Wind Turbine
… to look into the potential and practicality of vertical axis hybrid wind turbines (VAHWTs) for sustainable electricity generation and investigate the self-starting issue of VAWT. The development of sustainable energy sources has become increasingly critical in recent years because of growing …
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Vertical axis wind turbine acoustics
… quickly to changing wind conditions, small-scale vertical axis wind turbines (VAWTs) have been proposed as an efficient solution for deployment in built up areas, where the wind is more gusty in nature. If VAWTs are erected in built up areas they will be inherently close to people; consequently, …
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Vertical axis wind turbine with continuous blade angle adjustment
The author presents a concept for a vertical axis wind turbine that utilizes each blade's entire rotational cycle for power generation. Each blade has its own vertical axis of rotation and is constrained to rotate at the rate of one half of a revolution per full revolution of the rotor. For a rotor …
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CFD Analysis for Optimization of Vertical Axis Wind Turbine Farms
Vertical Axis Wind Turbines (VAWT) have gained more importance due to their compactness, adaptability and ease of installation. However, the efficiency of VAWT is much lesser than that of Horizontal Axis Wind Turbine (HAWT). Substantial research is going on to improve the efficiency of VAWT. One of …
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Optimized design of aerodynamic airfolis for vertical axis wind turbines
… Due to their higher energy output, horizontal-axis wind turbines have been traditionally the preferred option. Nevertheless, vertical-axis wind turbines are becoming relevant, specially in urban areas. Their advantages evidence the need of further research to overcome the main drawbacks that …
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The aerodynamic control of the v-type vertical axis wind turbine
The V-type vertical axis wind turbine (V-VAWT) is of simple design and construction, has a low aerodynamic efficiency, yet its originators consider that it will be a cost effective configuration in electricity generation applications. However, the quality and reliability of its power output must be …
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Aerodynamic Enhancement and Reduced Order Modeling of Vertical Axis Wind Turbines
Vertical-axis wind turbines (VAWTs) are recognized as a viable solution for wind energy harvesting. This study discusses VAWT performance in different aspects. First, using computational fluid dynamics (CFD) simulations, the impact of various deflector angles as an auxiliary augmentation on turbine …
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Modeling the dynamics and stresses of elongated particles in vertical axis mixers
<p>Vertical axis mixers, such as high shear granulators and agitated filter dryers (AFDs), are commonly used in the processing of particulate materials. For example, AFDs are regularly used in the pharmaceutical industry to dry the wet active pharmaceutical ingredient (API) particles. During the …
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Optimization of Renewable Energy Siting Decisions through Vertical Axis Wind Turbine Integration
… United States. However, conventional Horizontal Axis Wind Turbines (HAWTs) face deployment constraints due to their large spatial requirements stemming from their size itself and turbine spacing to accommodate wake interference. Their large footprint makes it impractical to deploy in densely …
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Analysis and Improvement of Aerodynamic Performance of Straight Bladed Vertical Axis Wind Turbines
Vertical axis wind turbines (VAWTs) with straight blades are attractive for their relatively simple structure and aerodynamic performance. Their commercialization, however, still encounters many challenges. A series of studies were conducted in the current research to improve the VAWTs design and …
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Numerical modeling of floating vertical axis wind turbines for offshore renewable energy generation
L'abstract è presente nell'allegato / the abstract is in the attachment
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Design and Modelization of a Vertical-Axis Hydrokinetic Turbine for Low Flow Velocities
… de una pequeña turbina hidrocinética de eje vertical para bajas velocidades de flujo. El perfil del álabe, la solidez y la relación de aspecto del modelo de turbina se han seleccionado buscando un funcionamiento autoarrancable y eficiente. El modelo de turbina se ha fabricado utilizando la …
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Design and construction of vertical axis wind turbines using dual-layer vacuum-forming
… documents the design of a large scale display of vertical axis wind turbines that can be used to visualize wind. The intent is to build a matrix of several hundred turbines at MIT as part of the 150th anniversary celebration in 2011. The main focus is the appearance of the turbines, which are …
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Computational and Experimental Study on Vertical Axis Wind Turbine in Search for an Efficient Design
… conversion in to energy. Though Horizontal Axis Wind Turbine (HAWT) is more popular but needs high wind speed to generate energy. On the other hand Vertical Axis Wind Turbine (VAWT) needs low wind speed and can be installed anywhere which are some of the reasons for this research. The main …
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Optimization of a Vertical-Axis Wind Turbine Airfoils Using Machine Learning, Numerical and Experimental Methodologies
… to enhance the aerodynamic performance of a Vertical-Axis Wind Turbine (VAWT) airfoil through a multidisciplinary approach that combines Machine Learning (ML), Computational Fluid Dynamics (CFD), and experimental validation. The focus was on enhancing the lift-to-drag coefficients ratio (퐶 푙 …
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Experimental and simulation study on the aerodynamic performance of a counter rotating vertical axis wind turbine
The Darrieus H-rotor has gained much interest in the last few decades as among the reliable devices for wind energy conversion techniques, for their relatively simple structure and aerodynamic performance. In the present work, development and aerodynamic performance predictions of a unique …
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Effects of blade configuration on flow distribution and power output of a zephyr vertical axis wind turbine.
… and can be harvested using both horizontal and vertical axis wind turbines. This thesis presents studies of a vertical axis wind turbine performance for applications in urban areas. Numerical simulations with FLUENT software are presented to predict the fluid flow through a novel Zephyr vertical …
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Optimization of a Savonius rotor vertical-axis wind turbine for use in water pumping systems in rural Honduras
The D-lab Honduras team designed and constructed a wind-powered water pump in rural Honduras during IAP 2007. Currently, the system does not work under its own power and water must be pumped by hand. This thesis seeks to explore a variety of mechanism and aerodynamic changes to allow the system to …
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