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

Abdalrahman, Gebreel; Melek, William; Lien, Fue‐Sang

doi:10.1016/j.renene.2017.07.068

Cited by 124 publications

(52 citation statements)

References 52 publications

(76 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, Chen et al 87 , using a simple sinusoidal pitch variation demonstrated that the power efficiency was improved significantly (up to ) and that the ripple factor of the power output was correspondingly. Numerical studies conducted by Sagharichi et al 42 demonstrated the variable pitch strategy could lead to an improved turbine power production, which should be applied especially at low and Abdalrahman et al 88 proposed that the application of active pitch control using an intelligent neural network would provide an appropriate technique.…”

Section: Figure Definition Of Blade Pitch Angle 5 261 Active Pitch mentioning

confidence: 99%

A review of H-Darrieus wind turbine aerodynamic research

Ingram

Dominy

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

The H-Darrieus vertical axis turbine is one of the most promising wind energy converters for locations where there are rapid variations of wind direction, such as in the built environment. The most challenging considerations when employing one of these usually small machines are to ensure that they self-start and to maintain and improve their efficiency. However, due to the turbine's rotation about a vertical axis, the aerodynamics of the turbine are more complex than a comparable horizontal axis wind turbine and our knowledge and understanding of these turbines falls remains far from complete. This paper provides a detailed review of past and current studies of the H-Darrieus turbine from the perspective of design parameters including turbine solidity, blade profile, pitch angle, etc. and particular focus is put on the crucial challenge to design a turbine that will self-start. Moreover, this paper summarizes the main research approaches for studying the turbine in order to identify successes and promising areas for future study.

show abstract

Section: Figure Definition Of Blade Pitch Angle 5 261 Active Pitch mentioning

confidence: 99%

A review of H-Darrieus wind turbine aerodynamic research

Ingram

Dominy

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

View full text Add to dashboard Cite

show abstract

“…Where Tm is the mechanical torque of the turbine (N.m). To optimize the mechanical efficiency at different wind speeds, there is only one appropriate rotor speed with maximum Cp value and optimum tip speed ratio [28,29].…”

Section: Vawt Modelmentioning

confidence: 99%

Smart Variable Rotor of Vertical Axis Wind Turbine with Faster Cut-in Speed and Wide Range Extract Power Using Artificial Intelligent

Fadil¹,

Soedibyo²,

Ashari³

2020

IJIES

View full text Add to dashboard Cite

This paper presents the standalone type vertical axis wind turbine (VAWT) smart rotor using variable diameter rotor (VDR) in order to tap constant power and maintain cut-in wind speed. VDR is a smart variable rotor capable of operating at a low wind speed, in which the width of diameter rotor is adjustable using actuators. The VDR rotor is connected to the permanent magnet synchronous generator (PMSG) and a DC-DC boost converter. The controller of VDR rotors uses fuzzy logic controller (FLC). The FLC variable inputs are wind speed data and power output, broken down into cluster groups to determine the diameter rotor position. The wind speed data as fuzzy input are produced by wind speed estimator using artificial neural network (ANN) to maintain cut-in speed to be faster. The velocity movement of VDR is limited from 75 cm to 150 cm. The VDR extension increases by 25% when the wind speed decreases from 8 to 6 m/s to obtain consistent power at 150 Watt. The experimental of VDR system is tested at low wind speeds ranging from 1 to 8 m/s as a verification of the control system. The result showed that the VDR produced five times increase in efficiency with faster cut-in wind speed at 2.0 m/s.

show abstract

“…The authors showed that by decreasing the amplitude of the change in pitch amplitude from 30 + to 8 + , a peak power coefficient greater than 0.3 can be achieved and maintained between peak speed ratios of 1e2.5. Abdalrahman et al [18] studied the effects of fixed and variable pitch blades on the performance of a Darrieus turbine using CFD simulation. A 2D simulation of unsteady flow with a moving mesh and k À u turbulence model.…”

Section: Review Analysismentioning

confidence: 99%

Experimental and numerical analysis of a novel Darrieus rotor with variable pitch mechanism at low TSR

Zouzou

Dobrev

Massouh

et al. 2019

Energy

View full text Add to dashboard Cite

a b s t r a c tThe Darrieus vertical axis wind-turbine (VAWT) has been the subject of numerous recent studies aimed at improving its aerodynamic performance in order to locate it in urban areas. This article is devoted to the study of an original VAWT with variable-pitch and low tip speed ratio TSR which is favorable to noise reduction and can operate at low velocity wind. The aerodynamic performance of this turbine is studied experimentally in wind tunnel as well as by CFD. In order to obtain the 3D-flow field around the wind turbine rotor, the numerical simulations are performed by means of detached eddy simulation method (DES). The simulation of pitch variation is made possible by using sliding-mesh method. Thus a specially created program adapts the pitch depending on the blade azimuthal position during rotation. The obtained results show that adapted pitch blades are preferable because they permit to obtain a power coefficient Cp that rivals other VAWT in the case of TSR < 1. The maximum torque fluctuation during rotation is lower in the case of adapted variable-pitch compared to fixed-pitch and thus the maximum aerodynamic loads on the structure can be reduced. Moreover, the pitch adaptation leads to lower interaction effects between the upstream-blade wake and down-stream blades.

show abstract

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

Abstract: The following served on the Examining Committee for this thesis. The decision of the Examining Committee is by majority vote.

Cited by 124 publications

References 52 publications

A review of H-Darrieus wind turbine aerodynamic research

A review of H-Darrieus wind turbine aerodynamic research

Smart Variable Rotor of Vertical Axis Wind Turbine with Faster Cut-in Speed and Wide Range Extract Power Using Artificial Intelligent

Experimental and numerical analysis of a novel Darrieus rotor with variable pitch mechanism at low TSR

Contact Info

Product

Resources

About