Small power wind turbine (Type DARRIEUS)

Nila, Ion; Bogateanu, Radu; Stere, Marcel; Carafoli, Elie

doi:10.13111/2066-8201.2012.4.1.14

Cited by 4 publications

(4 citation statements)

References 3 publications

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“…In addition, commercial CFD packages such as ANSYS contain interfaces that allow users to input the parameters of the problem and simulate the flow behaviour of the system. 1 Published in Renewable Energy Journal [110] 3.2 The CFD model CFD techniques have recently been applied to study the aerodynamic behavior of VAWTs [37]. In the study presented in this thesis, ANSYS-Fluent was utilized for the simulation of both fixed and variable pitch angle 2D three-bladed H-Darrieus VAWT with NACA 0018 airfoil at different tip speed ratios in order to predict the H-type VAWT aerodynamic performance and investigate the self-starting capability.…”

Section: Introductionmentioning

confidence: 99%

“…The horizontal axis wind turbines (HAWTs) industry has received considerable attention compared to that of vertical axis wind turbines (VAWTs) because of their high efficiency. Most VAWTs operate at a relatively low tip speed ratio (TSR) of only 2 to 3 [1].…”

mentioning

confidence: 99%

“…1 shows the main dimensions and parameters of the H-type VAWT CFD model, which are based on previous studies[43][5]. For each TSR (1, 1.7, 2, 2.5, or 3.3), the H-type…”

mentioning

confidence: 99%

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Pitch angle control for a small-scale Darrieus vertical axis wind turbine with straight blades (H-Type VAWT)

2017

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

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Pitch angle control for a small-scale Darrieus vertical axis wind turbine with straight blades (H-Type VAWT)

2017

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“…A 1000 W helical vertical axis wind turbine was designed and analyzed by A. Dumitrascu et al for Romanian regions to estimate the reliability function and hazard rate. This type of wind turbine is easy to mount on a rooftop and suitable for a small scale wind turbine application [4]. The low efficiency of Savonius vertical axis wind turbine leads to the experiment developed by Andre Alaimo et al to identify and study factors affecting the performance such as the number of blades, interference of shaft and the shape of the rotor.…”

Section: Introductionmentioning

confidence: 99%

A Computational and Experimental Study of a Small-Scale Flat-Shaped Vertical Axis Wind Turbine

Kadir¹,

Mohamed²,

Manap³

2018

IJET

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This paper focuses on a computational and experimental study of flat-shaped turbine blades for a small scale Vertical Axis Wind Turbine (VAWT). In the computational analysis, a 2-Dimensional (2D) wind turbine model with three flat blades was designed using Ansys Flu-ent, which is computational fluid dynamics (CFD) software. The wind speed around the blades was simulated in a range of 3 m/s to 8 m/s. Velocity and pressure distributions of the airflow around the blades were then observed. Pressures acting on the blades surface were then averaged and used to estimate the angular speed of the wind turbine model using the principles of torque and moment of inertia. A small-scale prototype was designed, fabricated and tested to validate the simulation result. Testing results show that the wind turbine prototype can rotate with an average speed of 148.8 rpm when having a 3.27 m/s wind speed. At the similar wind speed, the simulation result has estimated the angular speed to be 119 rpm. The percentage difference of the angular speed is about 20%. .

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Performance and dynamic characteristics of a multi stages vertical axis wind turbine

Attia¹,

Saber²,

Gamal³

2016

J. vibroeng.

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Vertical axis wind turbines (VAWTs) are used to convert wind energy to mechanical output or electricity. Vertical axis wind turbines are favorable at buildings as it can receive wind from any direction, have a design that can be integrated simply with building architecture and they have better response in turbulent wind flow which is common in urban areas. Using a calculation code based on the Double Multiple Stream Tube theory, symmetrical straight-bladed NACA0012 wind turbine performance was evaluated. The induction factor for both upwind and downwind zone is determined with the aid of a root-finding algorithm. This numerical analysis highlighted how turbine performance is strongly influenced by the wind speed (Reynolds number) and rotor solidity (turbine radius and blade chord length). Also a dimensional analysis is introduced and is to be considered in such a way to generalize the design for different turbine specifications. One of the qualities provided by dimensional analysis is that geometrically similar turbines will produce the same non-dimensional results. This allows one to make comparison between different sizes wind turbines in terms of power output and other related variables. One of the main problems affecting the turbine performance and dynamics is the torque ripple phenomena. So in this paper a turbine design configuration is introduced in order to decrease the turbine torque fluctuation. This design is carried out by constructing more similar turbine units (stages) on the vertical axis on top of each other with different orientation phase angles. The results showed that using even number of turbine assembly is better than odd number to avoid torque fluctuation and mechanical vibrations acting on the turbine. Also it is preferred to use four turbine stages as the eight stages will have no sensible effect on decreasing the torque fluctuation.

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Small power wind turbine (Type DARRIEUS)

Cited by 4 publications

References 3 publications

Pitch angle control for a small-scale Darrieus vertical axis wind turbine with straight blades (H-Type VAWT)

Pitch angle control for a small-scale Darrieus vertical axis wind turbine with straight blades (H-Type VAWT)

A Computational and Experimental Study of a Small-Scale Flat-Shaped Vertical Axis Wind Turbine

Performance and dynamic characteristics of a multi stages vertical axis wind turbine

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