Acceder

Bibliografías temáticas / Vertical axis wind turbines

Índice

Artículos de revistas
Tesis
Libros
Capítulos de libros
Actas de conferencias
Informes

Literatura académica sobre el tema "Vertical axis wind turbines"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 9 de junio de 2025

Crea una cita precisa en los estilos APA, MLA, Chicago, Harvard y otros

Elija tipo de fuente:

Consulte las listas temáticas de artículos, libros, tesis, actas de conferencias y otras fuentes académicas sobre el tema "Vertical axis wind turbines".

Junto a cada fuente en la lista de referencias hay un botón "Agregar a la bibliografía". Pulsa este botón, y generaremos automáticamente la referencia bibliográfica para la obra elegida en el estilo de cita que necesites: APA, MLA, Harvard, Vancouver, Chicago, etc.

También puede descargar el texto completo de la publicación académica en formato pdf y leer en línea su resumen siempre que esté disponible en los metadatos.

Artículos de revistas sobre el tema "Vertical axis wind turbines"

1

Putri, Salsabillah Shiva, Sudarti ., and Yushardi . "Analisis Cara Kerja Turbin Angin Sumbu Vertikal." Jurnal Pendidikan, Sains Dan Teknologi 2, no. 2 (December 7, 2023): 1034–36. http://dx.doi.org/10.47233/jpst.v2i2.1356.

Texto completo

Resumen

Wind is the movement of air from an area with high pressure to an area with low pressure. Wind energy is one of the many abundant renewable energies. One example of the use of wind energy in Indonesia is the Wind Power Plant. A vertical axis wind turbine is a wind turbine that moves vertically where its axis is perpendicular to the ground surface. The advantage of this vertical axis windmill is that the turbine is not always directed towards the wind. The disadvantage of vertical axis wind turbines is that their efficiency is lower than horizontal axis wind turbines because there is lower wind speed and air resistance. In this article we will explain about vertical axis wind turbines, Wind Power Plants, and how wind turbines work. The research method used in writing this article is the literature study research method by reviewing several articles. From the research that has been carried out, the results obtained are an understanding of vertical axis wind turbines and wind power plants.

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Raj Kamal, M. D., P. Harish Krishna, G. Jagadeesh Babu, Ashwin Suresh, and K. Baskar. "Vertical Axis Wind Turbine." Asian Review of Mechanical Engineering 6, no. 2 (November 5, 2017): 1–3. http://dx.doi.org/10.51983/arme-2017.6.2.2434.

Texto completo

Resumen

The main objective of this paper is to design the vertical axis wind turbine. The design of the turbine will include the study of various vertical axis wind turbines. Various wind turbines converting wind energy to a rotary motion have been already suggested and practiced. Among them, the horizontal axis wind turbine is required to have the propeller rotating disk always rightly aligned with the wind direction, whereas the vertical axis wind turbine is Omni-directional, is not influenced at all by the wind direction and is better in respect of the configuration and operation.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Ackshaya Varshini, K. S., Alenkar K. Aswin, H. Rajan, and K. S. Maanav Charan. "Concept design and numerical analysis of hybrid solar–wind turbine." IOP Conference Series: Earth and Environmental Science 850, no. 1 (November 1, 2021): 012032. http://dx.doi.org/10.1088/1755-1315/850/1/012032.

Texto completo

Resumen

Abstract A wind turbine is a device that converts wind energy to electrical energy. External factors such as wind speed and direction shift, as well as turbine blade design considerations, cause a significant amount of energy to be wasted throughout the conversion process. Considering all these losses, a turbine’s average efficiency is roughly 45 percent. The blades of a wind turbine are one of the most crucial factors in determining the turbine’s efficiency. The design and geometry of the blades have a direct impact on performance since it determines how much kinetic energy from the wind is converted into mechanical energy. Many concepts and technologies are being used to improve the efficiency of wind turbines while lowering their maintenance costs. Wind turbines based on their axis orientation are classified as vertical axis and horizontal axis. Vertical axis wind turbines are not as widespread as their horizontal-axis counterparts due to their lower efficiency. In this study, we will use a Savonius vertical axis wind turbine to investigate a way of enhancing its efficiency by installing solar panels on its vertical blades and determining the best performance angle at which the turbine should be kept achieving maximum efficiency. Computation fluid dynamic analysis and thermal and structural analysis has been performed to check the efficiency of the designed blade. As a result, an optimized wind turbine design has been developed.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Khudri Johari, Muhd, Muhammad Azim A Jalil, and Mohammad Faizal Mohd Shariff. "Comparison of horizontal axis wind turbine (HAWT) and vertical axis wind turbine (VAWT)." International Journal of Engineering & Technology 7, no. 4.13 (October 9, 2018): 74. http://dx.doi.org/10.14419/ijet.v7i4.13.21333.

Texto completo

Resumen

As the demand for green technology is rising rapidly worldwide, it is important that Malaysian researchers take advantage of Malaysia’s windy climates and areas to initiate more power generation projects using wind. The main objectives of this study are to build a functional wind turbine and to compare the performance of two types of design for wind turbine under different speeds and behaviours of the wind. A three-blade horizontal axis wind turbine (HAWT) and a Darrieus-type vertical axis wind turbine (VAWT) have been designed with CATIA software and constructed using a 3D-printing method. Both wind turbines have undergone series of tests before the voltage and current output from the wind turbines are collected. The result of the test is used to compare the performance of both wind turbines that will imply which design has the best efficiency and performance for Malaysia’s tropical climate. While HAWT can generate higher voltage (up to 8.99 V at one point), it decreases back to 0 V when the wind angle changes. VAWT, however, can generate lower voltage (1.4 V) but changes in the wind angle does not affect its voltage output at all. The analysis has proven that VAWT is significantly more efficient to be built and utilized for Malaysia’s tropical and windy climates. This is also an initiative project to gauge the possibility of building wind turbines, which could be built on the extensive and windy areas surrounding Malaysian airports.

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

GALLO TORRES, MARLON, ENEKO MOLA SANZ, IGNACIO MUGURUZA FERNANDEZ DE VALDERRAMA, AITZOL UGARTEMENDIA ITURRIZAR, GONZALO ABAD BIAIN, and DAVID CABEZUELO ROMERO. "STATE OF THE ART OF SMALL WIND ENERGY ANALYSING DIFFERENT CONTROLS." DYNA 97, no. 1 (January 1, 2022): 11. http://dx.doi.org/10.6036/10376.

Texto completo

Resumen

There are two wind turbine topologies according to the axis of rotation: horizontal axis, "Horizontal Axis Wind Turbines" (HAWT) and vertical axis, "Vertical Axis Wind Turbines" (VAWT) [2]. HAWT turbines are used for high power generation as they have a higher energy conversion efficiency [2]. However, VAWTs are used in mini wind applications because they do not need to be oriented to the prevailing wind and have lower installation cost.

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Khammas, Farhan Ahmed, Kadhim Hussein Suffer, Ryspek Usubamatov, and Mohmmad Taufiq Mustaffa. "Overview of Vertical Axis Wind Turbine (VAWT) is one of the Wind Energy Application." Applied Mechanics and Materials 793 (September 2015): 388–92. http://dx.doi.org/10.4028/www.scientific.net/amm.793.388.

Texto completo

Resumen

This paper reviews the available types of wind turbine which is one of the wind energy applications. The authors intend to give investors a better idea of which turbine is suitable for a particular setting and to provide a new outlook on vertical axis wind turbines. Wind technology has grown substantially since its original use as a method to grind grains and will only continue to grow. Vertical-axis wind turbines are more compact and suitable for residential and commercial areas while horizontal-axis wind turbines are more suitable for wind farms in rural areas or offshore. However, technological advances in vertical axis wind turbines that are able to generate more energy with a smaller footprint are now challenging the traditional use of horizontal wind turbines in wind farms. Vertical axis wind turbines do not need to be oriented to the wind direction and offer direct rotary output to a ground-level load, making them particularly suitable for water pumping, heating, purification and aeration, as well as stand-alone electricity generation. The use of high efficiency Darrieus turbines for such applications is virtually prohibited by their inherent inability to self-start.

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Wang, Minxing, Xintao Yu, and Wenbo Zhao. "Systematic Characteristics of Vertical and Horizontal Axis Wind Turbine." Highlights in Science, Engineering and Technology 112 (August 20, 2024): 365–70. http://dx.doi.org/10.54097/8wjx0960.

Texto completo

Resumen

Wind power is one of the main directions of future renewable energy development. Wind turbines can be classified according to their axes. The two major categories are vertical axis wind turbines and horizontal axis wind turbines, both types have their unique characteristics in efficiency, operating principle, and operating environment. Based on the study on structure and power generating mechanism of vertical axis and horizontal axis wind turbines, compare the characteristics and point out the advantages and disadvantages of both types of wind turbines. This research aims to study the use of vertical-axis and horizontal-axis wind turbines, to achieve better efficiency at different working conditions. Compared to other clean energy sources, wind power has the advantages of mature technology, but it still has room for improvement. For example, the blade design on wind turbines can be optimized to increase the efficiency. The prospect of wind power cannot be ignored.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Guo, Jia, and Liping Lei. "Flow Characteristics of a Straight-Bladed Vertical Axis Wind Turbine with Inclined Pitch Axes." Energies 13, no. 23 (November 28, 2020): 6281. http://dx.doi.org/10.3390/en13236281.

Texto completo

Resumen

Currently, vertical axis wind turbines (VAWT) are considered as an alternative technology to horizontal axis wind turbines in specific wind conditions, such as offshore farms. However, complex unsteady wake structures of VAWTs exert a significant influence on performance of wind turbines and wind farms. In the present study, instantaneous flow fields around and downstream of an innovative VAWT with inclined pitch axes are simulated by an actuator line model. Unsteady flow characteristics around the wind turbine with variations of azimuthal angles are discussed. Several fluid parameters are then evaluated on horizontal and vertical planes under conditions of various fold angles and incline angles. Results show that the total estimated wind energy in the shadow of the wind turbine with an incline angle of 30° and 150° is 4.6% higher than that with an incline angle of 90°. In this way, appropriate arrangements of wind turbines with various incline angles have the potential to obtain more power output in a wind farm.

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Rabelo Moraes, André, Carlos Eduardo Silva Abreu, Arthur Eduardo Alves Amorim, and Rodrigo Fiorotti. "COMPUTATIONAL FLUID DYNAMICS ANALYSIS OF FLOW AUGMENTATION SYSTEM APPLIED TO VERTICAL AXIS WIND TURBINES." Revista Ifes Ciência 8, no. 1 (September 16, 2022): 1–10. http://dx.doi.org/10.36524/ric.v8i1.1325.

Texto completo

Resumen

Wind Energy, Convergent omnidirectional nozzle guide, Vertical Axis Wind Turbine, Energy Efficiency Wind energy, considered a stable alternative, can be implemented in cities by means of vertical axis wind turbines, which have better performance against turbulent flow compared to horizontal axis turbines. However, this type of turbine has not evolved technologically significantly in the last few centuries, being the horizontal axis turbines more studied and developed, due to the theoretical better efficiency of these turbines, which creates room for improvement. Therefore, vertical axis wind turbine will be studied and the performance of some enhancements will be analyzed aiming a more efficient harvesting of wind energy. In this regard, a flow augmentation system is proposed to be integrated with the wind turbine. In addition, the Lenz 2, S815 and JShaped airfoil shapes will be analyzed by Computational Fluid Dynamics – CFD technique on the ANSYS software for comparison of static torque generated by the wind turbine against wind flow for different angular positions of the turbine. Analyzing the gains obtained with the integration of the flow augmentation system proposed, achieving, this way, results regarding to cut in speed and overall efficiency of the shapes. Results show that the use of the convergent omnidirectional nozzle guide increased the overall static torque of all turbines, which would decrease the cut in speed, as well as its increased effectiveness on drag driven airfoils.

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Cho, Soo-Yong, Sang-Kyu Choi, Jin-Gyun Kim, and Chong-Hyun Cho. "An experimental study of the optimal design parameters of a wind power tower used to improve the performance of vertical axis wind turbines." Advances in Mechanical Engineering 10, no. 9 (September 2018): 168781401879954. http://dx.doi.org/10.1177/1687814018799543.

Texto completo

Resumen

In order to augment the performance of vertical axis wind turbines, wind power towers have been used because they increase the frontal area. Typically, the wind power tower is installed as a circular column around a vertical axis wind turbine because the vertical axis wind turbine should be operated in an omnidirectional wind. As a result, the performance of the vertical axis wind turbine depends on the design parameters of the wind power tower. An experimental study was conducted in a wind tunnel to investigate the optimal design parameters of the wind power tower. Three different sizes of guide walls were applied to test with various wind power tower design parameters. The tested vertical axis wind turbine consisted of three blades of the NACA0018 profile and its solidity was 0.5. In order to simulate the operation in omnidirectional winds, the wind power tower was fabricated to be rotated. The performance of the vertical axis wind turbine was severely varied depending on the azimuthal location of the wind power tower. Comparison of the performance of the vertical axis wind turbine was performed based on the power coefficient obtained by averaging for the one periodic azimuth angle. The optimal design parameters were estimated using the results obtained under equal experimental conditions. When the non-dimensional inner gap was 0.3, the performance of the vertical axis wind turbine was better than any other gaps.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Tesis sobre el tema "Vertical axis wind turbines"

1

Waltham, M. R. "Sailwing vertical axis wind turbines." Thesis, University of Reading, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.316334.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Rossander, Morgan. "Electromechanics of Vertical Axis Wind Turbines." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-331844.

Texto completo

Resumen

Wind power is an established mean of clean energy production and the modern horizontal axis wind turbine has become a common sight. The need for maintenance is high and future wind turbines may need to be improved to enable more remote and offshore locations. Vertical axis wind turbines have possible benefits, such as higher reliability, less noise and lower centre of gravity. This thesis focuses on electromechanical interaction in the straight bladed Darrieus rotor (H-rotor) concept studied at Uppsala University. One of the challenges with vertical axis technology is the oscillating aerodynamic forces. A force measurement setup has been implemented to capture the forces on a three-bladed 12 kW open site prototype. The normal force showed good agreement with simulations. An aerodynamic torque could be estimated from the system. The total electrical torque in the generator was determined from electrical measurements. Both torque estimations lacked the expected aerodynamic ripple at three times per revolution. The even torque detected is an important result and more studies are required to confirm and understand it. The force measurement was also used to study the loads on the turbine in parked conditions. It was discovered that there is a strong dependence on wind direction and that there is a positive torque on the turbine at stand still. The results can assist to determine the best parking strategies for an H-rotor turbine. The studied concept also features diode rectification of the voltage from the permanent magnet synchronous generator. Diodes are considered a cheap and robust solution for rectification at the drawback of inducing ripple in the torque and output voltage. The propagation of the torque ripple was measured on the prototype and studied with simulations and analytical expressions. One key conclusion was that the mechanical driveline of the turbine is an effective filter of the diode induced torque ripple. A critical speed controller was implemented on the prototype. The controller was based on optimal torque control and according to the experiments and the simulations it was able to avoid a rotational speed span. Finally, the optimal torque control was evaluated for multiple turbines with diode rectification to a common DC-link. The setup can potentially reduce the overall complexity of wind farms. The simulations suggest that stability of the system can be obtained by controlling the DC-link load as a semi constant voltage. The thesis is based on nine papers of which six are treated in the thesis summary.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Roynarin, Wirachai. "Optimisation of vertical axis wind turbines." Thesis, Northumbria University, 2004. http://nrl.northumbria.ac.uk/1655/.

Texto completo

Resumen

A practical Vertical Axis Wind Turbine (VAWTs) based on a Darrieus rotor has been designed and tested and found to be capable of self-starting at wind speeds above 4m/s. The self-start feature has been achieved by replacing the usual symmetrical aerofoil blade in the VAWT rotor and by using a concentric Savonius rotor or semi-cylinder turbine. A computer program was produced to compute the power coefficient versus tip speed ratio characteristics of a selected aerofoil profile employed in a VAWT. The program accounts for chord length, pitch angle, number of blades, and rotor radius at any wind speed. The published data from 40 aerofoil sections were assessed, taking into account the two main criteria — self-starting and efficiency. Computational fluid dynamics software (ANSYS, Flotran) has been used to investigate the lift and drag performance of a NACA 66-212 and NACA 4421 aerofoils in order to check the computer program predictions. Excellent agreement was obtained for the static aerofoil assessment, but only after special ICEM Computational Fluid Dynamics (CFD) meshing interface routines were utilised. However, agreement between the theoretical and published results was not good for the rotating aerofoils in a VAWT. Thus, further CFD work was not pursued and in preference, an experimental route was initiated. In the first series of wind tunnel tests involving three candidate profiles, good agreement was found between the experimental results and the mathematical models. The aerofoils chosen were the NACA 661-212, the 51223 and the Clark-Y standard aerofoils. A number of prototype VAWTs were fabricated and tested for the influence of the blade pitch angle, the chord length ratio, with 2 or 3 blades. The aerofoil surfaces were made from aluminium sheet with a standard surface finish. The prototype designs were tested in the Northumbria University low speed wind tunnel facility - the models were 0.4 m. high with a 0.4 m diameter. The torque versus wind speed characteristics were recorded and analysed. The S 1223 profile was found to be self-starting with high efficiency. This model generated a high power coefficient of about 0.3 at a tip speed ratio of 1.2. The second series of tests were carried out in field sites in the UK with a 2 m diameter straight—bladed Darrieus rotor prototype with 3 blades using the S1223 blade section. Three field trials were undertaken in the UK to produce realistic performance characteristics for wind conditions of 4-10 m/s. The maximum power coefficient of this machine was found to be 0.18 at a tip speed ratio of 1.2. In addition, an alternative semi-cylinder turbine combined with a Darrieus rotor was fabricated and tested in the UK. It demonstrated the advantage that it could self-start at lower wind speeds, that is 3m/s but delivers approximately 50% less power than that obtained from the first proposed design. A final phase of testing was carried out with an enlarged and modified 3 m diameter prototype installed at a shrimp farm in Thailand to demonstrate how the unit could be used to replace an equivalent 2 HP 2-stroke diesel engine and hence eliminate its inherent emission pollution problems. A Savonius rotor was fitted to the prototype to improve self-start capabilities at a wind speed of 4 m/s for a practical application which by its nature required a high starting torque. The designs are easy to fabricate, low cost, pollution free and have been demonstrated to be ideal for applications in developing countries where there are sufficient wind resources.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Pearson, Charlie. "Vertical axis wind turbine acoustics." Thesis, University of Cambridge, 2014. https://www.repository.cam.ac.uk/handle/1810/245256.

Texto completo

Resumen

Increasing awareness of the issues of climate change and sustainable energy use has led to growing levels of interest in small-scale, decentralised power generation. Small-scale wind power has seen significant growth in the last ten years, partly due to the political support for renewable energy and the introduction of Feed In Tariffs, which pay home owners for generating their own electricity. Due to their ability to respond 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, public acceptance of the turbines is essential. One common obstacle to the installation of wind turbines is noise annoyance, so it is important to make the VAWT rotors as quiet as possible. To date, very little work has been undertaken to investigate the sources of noise on VAWTs. The primary aim of this study was therefore to gather experimental data of the noise from various VAWT rotor configurations, for a range of operating conditions. Experimental measurements were carried out using the phased acoustic array in the closed section Markham wind tunnel at Cambridge University Engineering Department. Beamforming was used in conjunction with analysis of the measured sound spectra in order to locate and identify the noise sources on the VAWT rotors. Initial comparisons of the spectra from the model rotor and a full-scale rotor showed good qualitative agreement, suggesting that the conclusions from the experiments would be transferable to real VAWT rotors. One clear feature observed in both sets of spectra was a broadband peak around 1-2kHz, which spectral scaling methods demonstrated was due to laminar boundary layer tonal noise. Application of boundary layer trips to the inner surfaces of the blades on the model rotor was found to eliminate this noise source, and reduced the amplitude of the spectra by up to 10dB in the region of the broadband peak. This method could easily be applied to a full-scale rotor and should result in measurable noise reductions. At low tip speed ratios (TSR) the blades on a VAWT experience dynamic stall and it was found that this led to significant noise radiation from the upstream half of the rotor. As the TSR was increased the dominant source was seen to move to the downstream half of the rotor; this noise was thought to be due to the interaction of the blades in the downstream half of the rotor with the wake from the blades in the upstream half. It was suggested that blade wake interaction is the dominant noise source in the typical range of peak performance for the full-scale QR5 rotor. Different solidity rotors were investigated by using 2-, 3- and 4-bladed rotors and it was found that increasing the solidity had a similar effect to increasing the TSR. This is due to the fact that the induction factor, which governs the deflection of the flow through the rotor, is a function of both the rotor solidity and the TSR. With a large body of experimental data for validation, it was possible to investigate computational noise prediction methods. A harmonic model was developed that aimed to predict the sound radiated by periodic fluctuations in the blade loads. This model was shown to agree with similar models derived by other authors, but to make accurate predictions very high resolution input data was required. Since such high resolution blade loading data is unlikely to be available, and due to the dominance of stochastic sources, the harmonic model was not an especially useful predictive tool. However, it was used to investigate the importance of the near-field components of the sound radiated by the wind tunnel model to the acoustic array. It was shown that the near-field terms were significant over a wide range of frequencies, and the total spectrum was always greater than that of the far-field component. This implied that the noise levels measured by the acoustic array represented an upper bound on the sound radiated to the far-field, and hence that the latter would also be dominated by stochastic components. An alternative application of the harmonic model, which attempted to determine the blade loading harmonics from the harmonics in the sound field was proposed. This inversion method utilised a novel convex optimisation technique that was found to generate good solutions in the simulated test cases, even in the presence of significant random noise. The method was found to be insensitive at low frequencies, which made it ineffective for inverting the real microphone data, although this was shown to be at least partly due to the limitations imposed by the array size. In addition to the harmonic models, an empirical noise prediction method using the spectral scaling laws derived by \citet*{Brooks_1989} was trialled, and was found to be capable of making predictions that were in agreement with the measured data. The model was shown to be sensitive to the exact choice of turbulence parameters used and was also found to require good quality aerodynamic data to make accurate noise predictions. If such data were available however, it is expected that this empirical model would be able to make useful predictions of the noise radiated by a VAWT rotor.

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Elmabrok, Ali Mohammed. "The aerodynamics of vertical axis wind turbines." Thesis, University of Manchester, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.629477.

Texto completo

Resumen

One of the operational problems encountered with vertical axis wind turbines is their low starting torque. A number of analytical methods were investigated to see whether they could predict the starting performance of vertical axis turbines. The chosen methods used " actuator disc theory" for both single and multiple streamtubes. Two different forms of the multiple streamtube model are applied, one using a single actuator disc and the other using two discs in tandem. The computational analysis of all models simulates the blade aerodynamics throughout the full range of incidence from -180° to 180°. The effects of varying various geometric parameters of the windmill upon the performance of the rotor are investigated to find a design with improved self starting characteristics. The best agreement between theory and experiment was obtained using the multiple streamtube (double disc) method. Savonius rotors have been commonly employed as " starters "for Darrieus turbines. A new analytical method has been developed to model the performance characteristics of the Savonius rotor. In this method the blade is divided up into small elements, and each element is treated as a thin airfoil. The rotor torque and power are computed taking into account the blades' motion, the blade shape and momentum consideration. This method shows good agreement with experimental results for a variety of Savonius rotors.A new experimental technique has been developed to provide information about the variation of torque within a cycle. These results have been used as a check on all the theoretical methods. The agreement between these experimental results and the theoretical methods show that they predict both the time averaged and the instantaneous performance.

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

D'Ambrosio, Marco, and Marco Medaglia. "Vertical Axis Wind Turbines: History, Technology and Applications." Thesis, Halmstad University, Halmstad University, School of Business and Engineering (SET), 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-4986.

Texto completo

Resumen

<p>In this Master Thesis a review of different type of vertical axis wind turbines (VAWT) and a preliminary investigation of a new kind of VAWT are presented.</p><p>After an introduction about the historical background of wind power, the report deals with a more accurate analysis of the main type of VAWT, showing their characteristics and their operations. The aerodynamics of the wind turbines and a review of different type on generators that can be used to connect the wind mill to the electricity grid are reported as well.</p><p>Several statistics are also presented, in order to explain how the importance of the wind energy has grown up during the last decades and also to show that this development of the market of wind power creates new opportunity also for VAWT, that are less used than the horizontal axis wind turbine (HAWT).</p><p>In the end of 2009 a new kind of vertical axis wind turbine, a giromill 3 blades type, has been built in Falkenberg, by the Swedish company VerticalWind. The tower of this wind turbine is made by wood, in order to get a cheaper and more environment friendly structure, and a direct driven synchronous multipole with permanent magnents generator is located at its bottom. This 200 kW VAWT represents the intermediate step between the 12 kW prototype, built in collaboration with the Uppsala University, and the common Swedish commercial size of 2 MW, which is the goal of the company.</p><p>A preliminary investigation of the characteristics of this VAWT has been done, focusing in particular on the value of the frequency of resonance of the tower, an important value that must be never reached during the operative phase in order to avoid serious damage to all the structure, and on the power curve, used to evaluate the coefficient of power (Cp) of the turbine. The results of this investigation and the steps followed to get them are reported. Moreover a energy production analysis of the turbine has been done using WindPro, as well as a comparison with and older type on commercial VAWT.</p>

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Bülow, Fredrik. "A Generator Perspective on Vertical Axis Wind Turbines." Doctoral thesis, Uppsala universitet, Elektricitetslära, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-197855.

Texto completo

Resumen

The wind energy conversion system considered in this thesis is based on a vertical axis wind turbine with a cable wound direct drive PM generator. Diode rectifiers are used to connect several such units to a single DC-bus and a single inverter controls the power flow from the DC-bus to a utility grid. This work considers the described system from a generator perspective i.e. the turbine is primarily seen as a torque and the inverter is seen as a controlled load. A 12 kW VAWT prototype with a single turbine has been constructed within the project. The power coefficient of this turbine has been measured when the turbine is operated at various tip speed ratios. This measurement determines both how much energy the turbine can convert in a given wind and at what speed the turbine should be operated in order to maximise the energy capture. The turbine torque variation during the revolution of the turbine has also been studied. A PM generator prototype has been constructed in order to study power loss in the stator core at low electrical frequencies. Heat exchange between the stator and the air-gap between the stator and the rotor has been studied. Heat exchange between the stator and the air-gap is increased by turbulence caused by the rotor. The generator was also used in a demonstration of a DC-grid where two diode rectified PM generators supplied power to a single DC load. An initial study of an inverter suitable for grid connection of the 12 kW PM generator has been performed. Several turbine control strategies are evaluated in simulations. The control strategies only require the parameter "turbine speed" to determine the optimal system load.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Scheurich, Frank. "Modelling the aerodynamics of vertical-axis wind turbines." Thesis, University of Glasgow, 2011. http://theses.gla.ac.uk/2897/.

Texto completo

Resumen

The current generation of wind turbines that are being deployed around the world features, almost exclusively, a three-bladed rotor with a horizontal-axis configuration. In recent years, however, a resurgence of interest in the vertical-axis wind turbine configuration has been prompted by some of its inherent advantages over horizontal-axis rotors, particularly in flow conditions that are typical of the urban environment. The accurate modelling of the aerodynamics of vertical-axis wind turbines poses a significant challenge. The cyclic motion of the turbine induces large variations in the angle of attack on the blades during each rotor revolution that result in significant unsteadiness in their aerodynamic loading. In addition, aerodynamic interactions occur between the blades of the turbine and the wake that is generated by the rotor. Interactions between the blades of the turbine and, in particular, tip vortices that were trailed in previous revolutions produce impulsive variations in the blade aerodynamic loading, but these interactions are notoriously difficult to simulate accurately. This dissertation describes the application of a simulation tool, the Vorticity Transport Model (VTM), to the prediction of the aerodynamic performance of three different vertical-axis wind turbines - one with straight blades, another with curved blades and a third with a helically twisted blade configuration - when their rotors are operated in three different conditions. These operating conditions were chosen to be representative of the flow conditions that a vertical-axis wind turbine is likely to encounter in the urban environment. Results of simulations are shown for each of the three different turbine configurations when the rotor is operated in oblique flow, in other words when the wind vector is non-perpendicular to the axis of rotation of the rotor, and also when subjected to unsteady wind. The performance of the straight-bladed turbine when it is influenced by the wake of another rotor is also discussed. The capability of the VTM to simulate the flow surrounding vertical-axis wind turbines has been enhanced by a dynamic stall model that was implemented in the course of this research in order to account for the effects of large, transient variations of the angle of attack on the aerodynamic loading on the turbine blades. It is demonstrated that helical blade twist reduces the oscillation of the power coefficient that is an inherent feature of turbines with non-twisted blades. It is also found that the variation in the blade aerodynamic loading that is caused by the continuous variation of the angle of attack on the blades during each revolution is much larger, and thus far more significant, than that which is induced by an unsteady wind or by an interaction with the wake that is produced by another rotor. Furthermore, it is shown that a vertical-axis turbine that is operated in oblique flow can, potentially, produce a higher power coefficient compared to the operation in conditions in which the wind vector is perpendicular to the axis of rotation, when the ratio between the height of the turbine and the radius of the rotor is sufficiently low.

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Möllerström, Erik. "Vertical Axis Wind Turbines : Tower Dynamics and Noise." Licentiate thesis, Högskolan i Halmstad, Energiteknik, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-242267.

Texto completo

Resumen

Vertical axis wind turbines (VAWTs) have with time been outrivaled by the today common and economically feasible horizontal axis wind turbines (HAWTs). However, VAWTs have several advantages such as the possibility to put the drive train at ground level, lower noise emissions and better scaling behavior which still make them interesting for research. The work within this thesis is made in collaboration between the Department of Construction and Energy Engineering at Halmstad University and the Division for Electricity at Uppsala University. A 200 kW VAWT owned by the latter and situated close to Falkenberg in the southwest of Sweden has been the main subject of the research even if most learnings has been generalized to fit a typical vertical turbine. This particular turbine has a wooden tower which is semi-guy-wired, i.e. the tower is both firmly attached to the ground and supported by guy-wires. This thesis has two main topics both regarding VAWTs: eigenfrequency of the tower and the noise generated from the turbine. The eigenfrequency of a semi-guy-wired tower is studied and an analytical expression describing this is produced and verified by experiments and simulations. The eigenfrequency of the wire itself and how it is affected by wind load are also studied. The noise characteristics of VAWTs have been investigated, both theoretically and by noise measurement campaigns. Both noise emission and frequency distribution of VAWTs has been studied. The work has resulted in analytical expressions for tower and wire eigenfrequency of a semi-guy-wired tower as well as recommendations for designing future towers for VAWTs. The noise emission of VAWTs has been studied and proven low compared to HAWTs. The noise frequency distribution of the 200 kW VAWT differs significantly from that of a similar size HAWTs with for example lower levels for frequencies below 3000 Hz.

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Eriksson, Sandra. "Direct Driven Generators for Vertical Axis Wind Turbines." Doctoral thesis, Uppsala : Acta Universitatis Uppsaliensis, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9210.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Libros sobre el tema "Vertical axis wind turbines"

1

Elmabrok, Ali Mohammed. The aerodynamics of vertical axis wind turbines. Manchester: University of Manchester, 1995.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

K, Pope, and Naterer Greg F, eds. Normalized power correlation for a vertical axis wind turbine with varying geometries. Boca Raton: CRC Press, 2009.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Jerry, Kennard, and United States. National Aeronautics and Space Administration, eds. Development of large, horizontal-axis wind turbines. [Washington, DC: National Aeronautics and Space Administration, 1985.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Sørensen, Jens Nørkær. General Momentum Theory for Horizontal Axis Wind Turbines. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22114-4.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Madsen, Peter Hauge. Design turbulence loads on horizontal-axis wind turbines. Roskilde, Denmark: Riso National Laboratory, 1986.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Kocurek, D. Lifting surface performance analysis for horizontal axis wind turbines. Golden, Colo: Solar Energy Research Institute, 1987.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Center, Lewis Research, United States. Dept. of Energy. Wind Energy Technology Division., and University of Toledo, eds. Wake effects on the aerodynamic performance of horizontal axis wind turbines. Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1985.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Center, Lewis Research, United States. Dept. of Energy. Wind Energy Technology Division, and University of Toledo, eds. Wake effects on the aerodynamic performance of horizontal axis wind turbines. Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1985.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Center, Lewis Research, United States. Dept. of Energy. Wind Energy Technology Division., and University of Toledo, eds. Wake effects on the aerodynamic performance of horizontal axis wind turbines. Cleveland, Ohio: National Aeronautics and Space Administration, Lewis Research Center, 1985.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

H, Hubbard Harvey, and Langley Research Center, eds. Sound propagation studies for a large horizontal axis wind turbine. Hampton, Va: National Aeronautics and Space Administration, Langley Research Center, 1985.

Buscar texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Más fuentes

Capítulos de libros sobre el tema "Vertical axis wind turbines"

1

Nelson, Vaughn. "Vertical Axis Wind Turbines." In Innovative Wind Turbines, 63–90. First edition. | Boca Raton, FL : CRC press/Taylor & FrancisGroup, [2020]: CRC Press, 2019. http://dx.doi.org/10.1201/9781003010883-4.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Mukinović, Merim, Gunther Brenner, and Ardavan Rahimi. "Analysis of Vertical Axis Wind Turbines." In Notes on Numerical Fluid Mechanics and Multidisciplinary Design, 587–94. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14243-7_72.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Yusof, A., and M. R. Mohamed. "Vertical Axis Wind Turbines: An Overview." In Lecture Notes in Electrical Engineering, 821–35. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2317-5_68.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Koch, Grady, and Elias Koch. "The Vertical-Axis Turbine." In LEGO Wind Energy, 29–55. Berkeley, CA: Apress, 2019. http://dx.doi.org/10.1007/978-1-4842-4439-5_3.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Mukinović, Merim, Gunther Brenner, and Ardavan Rahimi. "Aerodynamic Study of Vertical Axis Wind Turbines." In Lecture Notes in Computational Science and Engineering, 43–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-14438-7_4.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

De Tavernier, Delphine, Carlos Ferreira, and Anders Goude. "Vertical-Axis Wind Turbine Aerodynamics." In Handbook of Wind Energy Aerodynamics, 1317–61. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-31307-4_64.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

De Tavernier, Delphine, Carlos Ferreira, and Anders Goude. "Vertical-Axis Wind Turbine Aerodynamics." In Handbook of Wind Energy Aerodynamics, 1–44. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-05455-7_64-1.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

De Tavernier, Delphine, Carlos Ferreira, and Anders Goude. "Vertical-Axis Wind Turbine Aerodynamics." In Handbook of Wind Energy Aerodynamics, 1–45. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-05455-7_64-2.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Szubel, Mateusz, Mariusz Filipowicz, Karolina Papis-Frączek, and Maciej Kryś. "Tutorial 6 – Vertical-Axis Wind Turbine." In Computational Fluid Dynamics in Renewable Energy Technologies, 263–301. Boca Raton: CRC Press, 2023. http://dx.doi.org/10.1201/9781003202226-18.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Dumitrescu, Horia, Vladimir Cardoş, and Ion Mălăel. "The Physics of Starting Process for Vertical Axis Wind Turbines." In Springer Tracts in Mechanical Engineering, 69–81. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-16202-7_7.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Actas de conferencias sobre el tema "Vertical axis wind turbines"

1

Tanabe, Yasutada, Harutaka Oe, Hideaki Sugawara, Takashi Aoyama, and Yuta Uemura. "Simulations of Horizontal Axis Wind Turbines in complex operational conditions." In Vertical Flight Society 71st Annual Forum & Technology Display, 1–10. The Vertical Flight Society, 2015. http://dx.doi.org/10.4050/f-0071-2015-10304.

Texto completo

Resumen

A CFD/CSD coupling analysis code rFlow3D, developed in Japan Aerospace Exploration Agency (JAXA) originally for rotorcraft, has been applied to predict the airflows around horizontal axis wind turbines (HAWTs) and validated with existing experimental data. It is used to simulate the flowfield around HAWTs in realistic complex operating conditions, such as yawed wind, atmospheric boundary layer inflow, rotor/tower interaction, and in the wake of an upstream HAWT. This paper will describe the results of the simulations for these representative complex flowfield around HAWTs.

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Zhao, Qiuying, Jacob Ickes, Chunhua Sheng, and Abdollah Afjeh. "Numerical Investigations of Upwind and Downwind NREL 5MW Reference Wind Turbines Using CFD and CSD." In Vertical Flight Society 70th Annual Forum & Technology Display, 1–16. The Vertical Flight Society, 2014. http://dx.doi.org/10.4050/f-0070-2014-9686.

Texto completo

Resumen

The aerodynamic and structural behavior of four wind turbine configurations based off of the model NREL 5MW offshore horizontal axis wind turbine (HAWT) are examined using Computational Fluid Dynamics (CFD) and Computational Structural Dynamics (CSD) models. The four configurations studied were three-bladed, upwind and downwind, and two-bladed upwind and downwind configurations. In the CFD analysis, effects of pure aerodynamic loads on the wind turbine are studied. Rotor performance, such as power, full or sectional torque and bending moments of rotor blades, tower aerodynamic loading, and wake impact behind the rotor are compared and investigated. These high fidelity airloads are used as input to the CSD code in order to compute the system response to the applied airloads. The current CFD and CSD analyses provide insight into performance and aeromechanical responses of the offshore horizontal axis wind turbines.

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Kapoor, Gaurav, Gaurav Saini, and Mohammad Zunaid. "Design and Numerical Modelling of Highway Vertical Axis Wind Turbine." In 22nd ISME International Conference on Recent Advances in Mechanical Engineering for Sustainable Development, 13–26. Switzerland: Trans Tech Publications Ltd, 2025. https://doi.org/10.4028/p-4ptpul.

Texto completo

Resumen

Vertical axis wind turbines (VAWTs) represent a significant advancement in harnessing wind energy, offering enhanced efficiency and adaptability. Their ability to capture wind from any direction makes them particularly suitable for urban environments and areas with unpredictable wind patterns.This study describes the design and its optimization for savonius vertical axis wind turbine for application in efficient energy generation on highways and our objective is to optimize the key parameters of design, including the blade arc angle , overlap ratio, and tip speed ratio to identify the best set of design configuration using Numerical Modelling done with the help of Computational Fluid Dynamics (CFD) Study of Turbine Blade Profile and enhance efficiency indicators like power and torque coefficient to achieve an optimal level of performance. The Outcomes and key findings of this study suggested that a rotor configuration with (Ø = 130°, OR = 0.15, TSR = 1) demonstrated the highest CP of 0.473 (47.3% wind to mechanical power conversion) and a CT of 0.255 (25.5% wind to torque generation), these values suggests an enhanced performance of turbine in terms of capturing wind energy and generating torque, this provides evidence for consideration of these results while defining design criteria for the vertical axis wind turbine suitable to our application.

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

S, Anjan P., Pranav A. P, Venugopal A, Yashwanth V, and Champa P. N. "Energy Generation using vertical Axis Wind Turbine." In 2025 International Conference on Intelligent and Innovative Technologies in Computing, Electrical and Electronics (IITCEE), 1–5. IEEE, 2025. https://doi.org/10.1109/iitcee64140.2025.10915504.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Graham, J. M. R., Joaquim Peiro, and John M. Rainbird. "Post-stall airfoil performance and vertical-axis wind turbines." In 33rd Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0720.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Simao Ferreira, Carlos, Matthew F. Barone, Alessandro Zanon, Rody Kemp, and Pietro Giannattasio. "Airfoil optimization for stall regulated vertical axis wind turbines." In 33rd Wind Energy Symposium. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2015. http://dx.doi.org/10.2514/6.2015-0722.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Parra-Santos, Teresa, Armando Gallegos-Muñoz, Miguel A. Rodriguez-Beneite, Cristobal Uzarraga-Rodriguez, and Francisco Castro-Ruiz. "Numerical Modeling of Vertical Axis Wind Turbines." In ASME 2014 4th Joint US-European Fluids Engineering Division Summer Meeting collocated with the ASME 2014 12th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2014. http://dx.doi.org/10.1115/fedsm2014-21356.

Texto completo

Resumen

This paper aims to predict the performance of Vertical Axis Wind Turbine (VAWT), hence the modeling of kinetic energy extraction from wind and its conversion to mechanical energy at the rotor axis, is carried out. The H-type Darrieus turbine consists of three straight blades with shape of aerofoil attached to a rotating vertical shaft. The criterion on the selection of this kind of turbines, despite its reduced efficiency, is the easy manufacture in workshops. A parametric study has been carried out to analyze the camber effect on the non dimensional curves of power coefficient so that the self starting features as well as the range of tip speed ratio of operation could be predicted.

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Plourde, B. D., J. P. Abraham, G. S. Mowry, and W. J. Minkowycz. "Wind-Tunnel Tests of Vertical-Axis Wind Turbine Blades." In ASME 2011 5th International Conference on Energy Sustainability. ASMEDC, 2011. http://dx.doi.org/10.1115/es2011-54604.

Texto completo

Resumen

An ongoing research project is investigating the potential of locating vertical-axis wind turbines (WT) on remote, off-grid cellular communication towers. The goal of the WT is to provide local power generation to meet the electrical needs of the tower. While vertical-axis devices are less efficient than their more traditional horizontal-axis counterparts, they provide a number of practical advantages which make them a suitable choice for the present situation. First, the direction of their axis is aligned with the existing tower and its rotation does not interfere with the tower structure. Second, vertical-axis devices are much less susceptible to the direction of wind and they do not require control-systems to ensure they are oriented correctly. Third, vertical-axis turbines have very low start-up wind speeds so that they generate power over a wide range of speeds. Fourth, since vertical-axis turbines rotate at a slower speed compared with horizontal counterparts, they impart a lessened vibration load to the tower. These facts, collectively, make the vertical-axis turbine suitable for the proposed application. The design process involved a detailed initial design of the turbine blade using computational methods. Next, a trio of designs was evaluated experimentally in a large, low-speed wind tunnel. The wind tunnel is operated by the University of Minnesota’s St. Anthony Falls Fluid Laboratory. The tunnel possesses two testing sections. The larger section was sufficient to test a full-size turbine blade. Accounting was taken of the blockage effect following the tests. The experiments were completed on (1) a solid-wing design (unvented), (2) a slotted-wing design (vented), and (3) a capped-and-slotted design (capped). Conditions spanned a wide range of wind speeds (4.5–11.5 m/s). The turbines were connected to electronics which simulated a range of electrical loads. The tested range was selected to span the expected range of resistances which will be found in practice. It was discovered that over a range of these wind speeds and electrical resistances, slots located on the wings result in a slight improvement in power generation. On the other hand, the slotted-and-capped design provided very large increases in performance (approximately 200–300% compared with the unvented version). This large improvement has justified commercialization of the product for use in powering remote, off-grid cellular communication towers.

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Nagare, Pranit, Arnav Nair, Rammohan Shettigar, Pratibha Kale, and Prasanna Nambiar. "Vertical axis wind turbine." In 2015 International Conference on Technologies for Sustainable Development (ICTSD). IEEE, 2015. http://dx.doi.org/10.1109/ictsd.2015.7095839.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Vafiadis, K., H. Fintikakis, I. Zaproudis, and A. Tourlidakis. "Computational Investigation of a Shrouded Vertical Axis Wind Turbine." In ASME Turbo Expo 2016: Turbomachinery Technical Conference and Exposition. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/gt2016-56190.

Texto completo

Resumen

In urban areas, it is preferable to use small wind turbines which may be integrated to a building in order to supply the local grid with green energy. The main drawback of using wind turbines in urban areas is that the air flow is affected by the existence of nearby buildings, which in conjunction with the variation of wind speed, wind direction and turbulence may adversely affect wind energy extraction. Moreover, the efficiency of a wind turbine is limited by the Betz limit. One of the methods developed to increase the efficiency of small wind turbines and to overcome the Betz limit is the introduction of a converging – diverging shroud around the turbine. Several researchers have studied the effect of shrouds on Horizontal Axis Wind Turbines, but relatively little research has been carried out on shroud augmented Vertical Axis Wind Turbines. This paper presents the numerical study of a shrouded Vertical Axis Wind Turbine. A wide range of test cases, were examined in order to predict the flow characteristics around the rotor, through the shroud and through the rotor – shroud arrangement using 3D Computational Fluid Dynamics simulations. The power output of the shrouded rotor has been improved by a factor greater than 2.0. The detailed flow analysis results showed that there is a significant improvement in the performance of the wind turbine.

Los estilos APA, Harvard, Vancouver, ISO, etc.

Informes sobre el tema "Vertical axis wind turbines"

1

Everett, Clint. Assessing wind energy potential for vertical axis wind turbines on the Tilikum Crossing. Portland State University Library, January 2016. http://dx.doi.org/10.15760/honors.256.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

2

Griffith, D. Todd, Matthew F. Barone, Joshua Paquette, Brian Christopher Owens, Diana L. Bull, Carlos Simao-Ferriera, Andrew Goupee, and Matt Fowler. Design Studies for Deep-Water Floating Offshore Vertical Axis Wind Turbines. Office of Scientific and Technical Information (OSTI), June 2018. http://dx.doi.org/10.2172/1459118.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

3

Ennis, Brandon. Aeroelastic Validation of the Sandia Offshore Wind Energy Simulator (OWENS) for Vertical-Axis Wind Turbines. Office of Scientific and Technical Information (OSTI), January 2025. https://doi.org/10.2172/2516830.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

4

Ennis, Brandon Lee, and D. Todd Griffith. System Levelized Cost of Energy Analysis for Floating Offshore Vertical-Axis Wind Turbines. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1466530.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

5

Mallick, Kaushik, Don Radford, Nate Bachman, David Snowberg, Michael Stewart, and W. Scott Carron. Vertical Axis Wind Turbine (VAWT) with Thermoplastic Composite Blades. Office of Scientific and Technical Information (OSTI), November 2019. http://dx.doi.org/10.2172/1650138.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

6

Ennis, Brandon, Edward Huang, Qing Yu, Kevin Moore, Michael Devin, T. K. Das, and Xiaohong Chen. ARCUS Vertical-Axis Wind Turbine: Final Scientific/Technical Report. Office of Scientific and Technical Information (OSTI), April 2025. https://doi.org/10.2172/2554118.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

7

Bull, Diana L., Matthew Fowler, and Andrew Goupee. A Comparison of Platform Options for Deep-water Floating Offshore Vertical Axis Wind Turbines: An Initial Study. Office of Scientific and Technical Information (OSTI), August 2014. http://dx.doi.org/10.2172/1150233.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

8

Searcy, Chad, Steve Perryman, Dilip Maniar, D. Todd Griffith, and Brandon Lee Ennis. Optimal Floating Vertical-Axis Wind Turbine Platform Identification Design and Cost Estimation. Office of Scientific and Technical Information (OSTI), August 2018. http://dx.doi.org/10.2172/1466529.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

9

Ralph, M. Data logger for the 34-meter vertical axis wind turbine test bed. Office of Scientific and Technical Information (OSTI), April 1990. http://dx.doi.org/10.2172/6909607.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

10

Mitchell, M., and A. Murphy. Fatigue behavior of vertical axis wind turbine airfoils with two weld configurations. Office of Scientific and Technical Information (OSTI), October 1989. http://dx.doi.org/10.2172/5414835.

Texto completo

Los estilos APA, Harvard, Vancouver, ISO, etc.

Ofrecemos descuentos en todos los planes premium para autores cuyas obras están incluidas en selecciones literarias temáticas. ¡Contáctenos para obtener un código promocional único!