Self-Start Performance Evaluation in Darrieus-Type Vertical Axis Wind Turbines:  Methodology and Computational Tool Applied to Symmetrical Airfoils

Batista, Nelson; Melício, Rui; Matias, João C. O.; Catalão, João P.S.

doi:10.24084/repqj09.302

Cited by 21 publications

(12 citation statements)

References 17 publications

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“…The aerodynamic force coefficients acting on a cross-sectional blade element of a Darrieus wind turbine are shown in Figure 8 [70]. The directions of the lift and drag coefficients as well as their normal and tangential components are illustrated.…”

Section: Single-blade Electrical Equivalent Circuit (Normal Tangentimentioning

confidence: 99%

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A New Approach for Modeling Darrieus-Type Vertical Axis Wind Turbine Rotors Using Electrical Equivalent Circuit Analogy: Basis of Theoretical Formulations and Model Development

et al. 2015

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Models are crucial in the engineering design process because they can be used for both the optimization of design parameters and the prediction of performance. Thus, models can significantly reduce design, development and optimization costs. This paper proposes a novel equivalent electrical model for Darrieus-type vertical axis wind turbines (DTVAWTs). The proposed model was built from the mechanical description given by the Paraschivoiu double-multiple streamtube model and is based on the analogy between mechanical and electrical circuits. This work addresses the physical concepts and theoretical formulations underpinning the development of the model. After highlighting the working principle of the DTVAWT, the step-by-step development of the model is presented. For assessment purposes, simulations of aerodynamic characteristics and those of corresponding electrical components are performed and compared.

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Section: Single-blade Electrical Equivalent Circuit (Normal Tangentimentioning

confidence: 99%

“…Based on [57,58,70,85], various impedances of a blade element, because we are using a complex coordinate system, the elementary equivalent impedance of a blade element is obtained by multiplying the corresponding elementary complex coefficient by the elementary surface. Thus, we can write:…”

Section: Normal Tangential Lift and Drag Impedancesmentioning

confidence: 99%

A New Approach for Modeling Darrieus-Type Vertical Axis Wind Turbine Rotors Using Electrical Equivalent Circuit Analogy: Basis of Theoretical Formulations and Model Development

et al. 2015

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“…The demand for sources of sustainable energy, the shortage of fossil fuels and the need for carbon footprint reduction have resulted in a global awareness of the importance of alternative energy sources and efficiency in the use of energy [1,2]. Particularly the internal combustion engines have become one of the major contributors for global greenhouse gases.…”

Section: Introductionmentioning

confidence: 99%

Wireless Energy Transfer with Three-Phase Magnetic Field System: Experimental Results

Romba¹,

Valtchev²,

Melício

2024

RE&PQJ

Self Cite

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Abstract. In this paper a three-phase magnetic field system is applied to the wireless power transfer system. The research is directed not only to the distribution of the magnetic field but to optimize the energy transfer efficiency, and to reduce the electromagnetic field influence to the surroundings. The development of the future intelligent transportation system depends on the electric mobility, namely, the individual or the public electric vehicles. It is crucial to achieve progress in the batteries and the battery charging, especially through a wireless power transfer technology. The study of the magnetic field is important in this technology. The energy transfer efficiency depends of the alignment, the size of the coils, the spatial orientation of the magnetic field, the detachment and the tilt between the windings.

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“…Vertical axis wind turbine (VAWT) has become popular research topic in recent years because it has better aerodynamic performance than the horizontal axis wind turbine under the complicated wind environment, [1][2][3] and therefore has tremendous potential applications at the urban environment, where the wind is very turbulent and unsteady.…”

Section: Introductionmentioning

confidence: 99%

Self-starting aerodynamics analysis of vertical axis wind turbine

Zhu

Huang

Shen

2015

Advances in Mechanical Engineering

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Vertical axis wind turbine is a special type of wind-force electric generator which is capable of working in the complicated wind environment. The self-starting aerodynamics is one of the most important considerations for this kind of turbine. This article aims at providing a systematic synthesis on the self-starting aerodynamic characteristics of vertical axis wind turbine based on the numerical analysis approach. First, the physical model of vertical axis wind turbine and its parameter definitions are presented. Secondary, the interaction model between the vertical axis wind turbine and fluid is developed by using the weak coupling approach; the numerical data of this model are then compared with the wind tunnel experimental data to show its feasibility. Third, the effects of solidity and fixed pitch angle on the self-starting aerodynamic characteristics of the vertical axis wind turbine are analyzed systematically. Finally, the quantification effects of the solidity and fixed pitch angle on the self-starting performance of the turbine can be obtained. The analysis in this study will provide straightforward physical insight into the self-starting aerodynamic characteristics of vertical axis wind turbine.

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Self-Start Performance Evaluation in Darrieus-Type Vertical Axis Wind Turbines: Methodology and Computational Tool Applied to Symmetrical Airfoils

Cited by 21 publications

References 17 publications

A New Approach for Modeling Darrieus-Type Vertical Axis Wind Turbine Rotors Using Electrical Equivalent Circuit Analogy: Basis of Theoretical Formulations and Model Development

A New Approach for Modeling Darrieus-Type Vertical Axis Wind Turbine Rotors Using Electrical Equivalent Circuit Analogy: Basis of Theoretical Formulations and Model Development

Wireless Energy Transfer with Three-Phase Magnetic Field System: Experimental Results

Self-starting aerodynamics analysis of vertical axis wind turbine

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