A simplified dynamic model for mast design of H-Darrieus vertical axis wind turbines (VAWTs)

Verkinderen, E.; Imam, Boulent

doi:10.1016/j.engstruct.2015.06.041

Cited by 10 publications

(8 citation statements)

References 20 publications

(25 reference statements)

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“…These models can be broadly classified into four categories: momentum models, vortex models, cascade models and computational fluid dynamic (CFD) models. Based on [17,[23][24][25][26][27][28][29][30], a quick literature survey was performed on most used models. Table 1 presents the relevant features as well as the advantages and shortcoming for each model category.…”

Section: The Necessity Of a New Modeling Approach For Darrieus-type Vmentioning

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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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: The Necessity Of a New Modeling Approach For Darrieus-type Vmentioning

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 results show that FRP is more suitable to blade material; Lin Wang [6] has used the finite element analysis and genetic algorithm to optimize the structure and weight of blade in the requirement of strength; Zhang Tingting et al [7] have analyzed the dynamics of the main axis of Darrieus wind turbine, calculated the range of wind speed which can avoid resonance, and obtained the optimal thickness of tube wall of main axis; Wang Jianyu [8] has analyzed the influence of blade shedding vortex on the dynamics of tower and main axis. The research shows that shedding vortex can induce 2 International Journal of Rotating Machinery resonance; Nidal H. Abu-Hamdeh [9] used ANSYS to model the majority of the structural components of a collapsible vertical axis wind turbine, and data from the mathematical models were used to verify the structure of the turbine and shafts were within acceptable stress and strain limits, the result of the experiments verified the mathematical simulation analysis; Yu Tang [10] used ANSYS Workbench static and modal analysis module to make load analysis of wind turbine internal maintenance lifting platform and obtained the maximum stress of platform bridge structure and place and form of deformation; E. Verkinderen [11] analyzed the coupled structure through a multidegree of freedom system, as well as numerically through the finite element (FE) method of H-Darrieus vertical axis wind turbines; Zheng Li [12] presented a method to simulate wind turbine gearbox system with the multibody drivetrain dynamic analysis software, and the modal analysis of wind turbine gearbox can be carried out on the basis of the multibody dynamic theory. The above researches are only focused on the analysis of common vertical axis wind turbine.…”

Section: Introductionmentioning

confidence: 84%

Static Mechanical Properties and Modal Analysis of a Kind of Lift-Drag Combined-Type Vertical Axis Wind Turbine

Feng

Zhao

et al. 2018

International Journal of Rotating Machinery

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In order to explore a set of methods to analyze the structure of Lift-Drag Combined-Type Vertical Axis Wind Turbine (LD-VAWT), a small LD-VAWT was designed according to the corresponding Standards and General Design Requirements for small vertical axis wind turbines. The finite element method was used to calculate and analyze the static mechanical properties and modalities of main parts of a kind of small-scale LD-VAWT. The contours of corresponding stress and displacement were obtained, and first six-order mode vibration profiles of main parts were also obtained. The results show that the main structure parts of LD-VAWT meet the design requirements in the working condition of the rated speed. Furthermore, the resonances of all main parts did not occur during operation in the simulations. The prototype LD-VAWT was made based on the analysis and simulation results in this study and operated steadily. The methods used in this study can be used as a reference for the static mechanical properties and modal analysis of vertical axis wind turbine.

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“…A weight evaluation was done to see the influence of renewable systems on ship loads. The total added weight on the ship is in the range between 1050 and 1520 tons, which corresponds to 2-3% of the total ship displacement [30][31][32]. Considering that the weight of the fossil fuel machinery and the fuel are removed, it is assumed that the weight increment produced can be easily balanced with cargo weight reduction.…”

Section: Ship Characteristicsmentioning

confidence: 99%

Concept Design and Performance Evaluation of a Fossil-Free Operated Cargo Ship with Unlimited Range

2020

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To meet the IMO goals of emissions reduction in shipping, drastic actions must be taken. Wind-assisted propulsion and renewable energy sources are today discussed frequently as realistic alternatives for future ship propulsion and energy production. This study presents a new and innovative concept of a fossil-free operated cargo ship aiming to achieve an unlimited range. The purpose of the study is to present the feasibility but also the limitations of a ship propelled and operated purely on renewable energy harnessed at sea, independent from shore-based energy sources. Aside from Flettner rotors for propulsion, the ship concept incorporates photovoltaic generators, wind turbines, and a dual-mode propeller to produce energy for the auxiliary systems and for the Flettner rotors, as well as batteries to balance the energy production and consumption. The dual-mode propeller can be used for energy generation and propulsion, thus levelling out any speed drops or peaks and thereby ensuring more reliable operation. The whole system is modelled numerically, and full ship voyages are simulated using the ship performance model ShipCLEAN. Results show feasible achieved speeds on a route with realistic weather conditions. However, negative energy balances limit the pure renewable sailing conditions. Further logistic and technical challenges are discussed.

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A simplified dynamic model for mast design of H-Darrieus vertical axis wind turbines (VAWTs)

Cited by 10 publications

References 20 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

Static Mechanical Properties and Modal Analysis of a Kind of Lift-Drag Combined-Type Vertical Axis Wind Turbine

Concept Design and Performance Evaluation of a Fossil-Free Operated Cargo Ship with Unlimited Range

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