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Lu, Lin Ping, Yi Ping Wang, and Qun Wu Huang. "Study on Tower Vibration Characteristic of 3-Rotor HAWT System." Applied Mechanics and Materials 724 (January 2015): 230–37. http://dx.doi.org/10.4028/www.scientific.net/amm.724.230.
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Multi-Rotor Horizontal Axis Wind Turbine (MR-HAWT) system with three 2kW Horizontal Axis Wind Turbines (HAWTs) is the research object. After some appropriate simplifications, the finite element model is established and verified by experiments. The vibration characteristic of the tower under rotors’ periodic excitations is studied through transient analysis method and compared with 6kW single-rotor HAWT system. The result shows that the maximum stress of the 3-Rotor Horizontal Axis Wind Turbine (3R-HAWT) system is less than the single-rotor HAWT, so the safety of the 3R-HAWT system is superior to the single-rotor HAWT system.
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Sang, Le Quang, Takao Maeda, and Yasunari Kamada. "Study effect of extreme wind direction change on 3-bladed horizontal axis wind turbine." International Journal of Renewable Energy Development 8, no. 3 (2019): 261–66. http://dx.doi.org/10.14710/ijred.8.3.261-266.
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The Horizontal Axis Wind Turbines (HAWT) are used very popular in the world. They were installed mainly on land. However, on the land, the wind regime change is very complex such as high turbulence and constantly changing wind direction. In the International Electrotechnical Commission (IEC) 61400-1 standard, the wind regime is devided into the normal wind conditions and the extreme wind conditions. This study will focus on the extreme wind direction change and estimate the aerodynamic forces acting on a 3-bladed HAWT under this condition. Because the extreme wind direction change may cause extreme loads and it will affect the lifetime of HAWTs. This issue is experimented in the wind tunnel in Mie University, Japan to understand these effects. The wind turbine model is the 3-bladed HAWT type and using Avistar airfoil for making blades. A 6-component balance is used to measure the forces and the moments acting on the entire wind turbine in the three directions of x, y and z-axes. This study estimates the load fluctuation of the 3-bladed wind turbine under extreme wind direction change. The results show that the yaw moment and the pitch moment under the extreme wind direction change fluctuate larger than the normal wind condition. Specifically, before the sudden wind direction change happened, the averaged maximum pitch moment MX is -1.78 Nm, and after that MX is 4.45 Nm at inrush azimuth of 0°.©2019. CBIORE-IJRED. All rights reserved
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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 (2018): 74. http://dx.doi.org/10.14419/ijet.v7i4.13.21333.
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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.
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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 (2022): 11. http://dx.doi.org/10.6036/10376.
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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.
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Al-Rawajfeh, Mohammad A., and Mohamed R. Gomaa. "Comparison between horizontal and vertical axis wind turbine." International Journal of Applied Power Engineering (IJAPE) 12, no. 1 (2023): 13. http://dx.doi.org/10.11591/ijape.v12.i1.pp13-23.
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Since ancient times, wind energy has been exploited in various fields, it was at the beginning used to rotate pumps for the purposes of agriculture and irrigation. At the beginning of the 18th century, wind turbines began to produce electricity with modest capacities. In the following years, the capacities of the turbines increased and it became necessary to deal with this increase by reducing losses and inventing new designs for turbines Suitable for working conditions and installation location. The rotor power coefficient in a wind turbine can reach 0.59 which is called the bets limit. The vertical axis wind turbine (VAWT) design was invented for working conditions, capacities, and places, in which it may be difficult to install older Horizontal axis wind turbines (HAWT). The efficiency of the HAWT is still higher than the VAWT, in addition, the amount of efficiency in the HAWT is greater than the VAWT by 25% but the VAWT has the amount of torque more than the HAWT. The main objective of this research is to compare the VAWT and the HAWT, taking into account several aspects which have been reviewed to try to understand the importance of the two designs.
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Mohammad, A. Al-Rawajfeh, and R. Gomaa Mohamed. "Comparison between horizontal and vertical axis wind turbine." International Journal of Applied Power Engineering 12, no. 1 (2023): 12–23. https://doi.org/10.11591/ijape.v12.i1.pp13-23.
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Since ancient times, wind energy has been exploited in various fields, it was at the beginning used to rotate pumps for the purposes of agriculture and irrigation. At the beginning of the 18th century, wind turbines began to produce electricity with modest capacities. In the following years, the capacities of the turbines increased and it became necessary to deal with this increase by reducing losses and inventing new designs for turbines Suitable for working conditions and installation location. The rotor power coefficient in a wind turbine can reach 0.59 which is called the bets limit. The vertical axis wind turbine (VAWT) design was invented for working conditions, capacities, and places, in which it may be difficult to install older Horizontal axis wind turbines (HAWT). The efficiency of the HAWT is still higher than the VAWT, in addition, the amount of efficiency in the HAWT is greater than the VAWT by 25% but the VAWT has the amount of torque more than the HAWT. The main objective of this research is to compare the VAWT and the HAWT, taking into account several aspects which have been reviewed to try to understand the importance of the two designs
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Syaukani, Muhammad, Fajar Sidik Sadono, Ilham Dwi Arirohman, Devia G. C. Alfian, Abdul Muhyi, and Naufal Ammar. "PENGARUH VARIASI JUMLAH BLADE TERHADAP PERFORMA HORIZONTAL AXIS WIND TURBINE MENGGUNAKAN QBLADE." SINERGI POLMED: Jurnal Ilmiah Teknik Mesin 5, no. 1 (2024): 80–85. http://dx.doi.org/10.51510/sinergipolmed.v5i1.1492.
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Perubahan iklim mendorong kita untuk dapat melakukan transisi dari energi konvesional ke energi baru terbarukan (EBT). Energi angin merupakan salah satu dari sekian banyak jenis energi terbarukan yang dapat dimanfaatkan menggunakan wind turbine. Wind Turbine diklasifikasikan menjadi Horizontal Axis Wind Turbine (HAWT) dan Vertical Axis Wind Turbine (VAWT). Penelitian ini bertujuan untuk mengetahui performa Horizontal Axis Wind Turbine (HAWT) terhadap variasi jumlah bilah 3, 5 dan 7. Pemodelan dan analisis menggunakan Q-Blade untuk memperoleh parameter perfoma seperti Coefficient of Performance (Cp), Daya mekanik, dan Torsi. Desain bilah HAWT menggunakan airfoil tipe NACA4412 dan panjang 1.2 m pada kecepatan angin 10 m/s dan TSR 7. Hasil Penelitian menunjukkan bahwa performa terbaik pada TSR 7 adalah HAWT dengan jumlah 3 bilah dengan Cp, torsi, dan daya mekanik tertinggi secara berurutan yaitu 0,46; 21,89 Nm; 1,28 kW.
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Borg, M., and M. Collu. "A comparison between the dynamics of horizontal and vertical axis offshore floating wind turbines." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 373, no. 2035 (2015): 20140076. http://dx.doi.org/10.1098/rsta.2014.0076.
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The need to further exploit offshore wind resources in deeper waters has led to a re-emerging interest in vertical axis wind turbines (VAWTs) for floating foundation applications. However, there has been little effort to systematically compare VAWTs to the more conventional horizontal axis wind turbine (HAWT). This article initiates this comparison based on prime principles, focusing on the turbine aerodynamic forces and their impact on the floating wind turbine static and dynamic responses. VAWTs generate substantially different aerodynamic forces on the support structure, in particular, a potentially lower inclining moment and a substantially higher torque than HAWTs. Considering the static stability requirements, the advantages of a lower inclining moment, a lower wind turbine mass and a lower centre of gravity are illustrated, all of which are exploitable to have a less costly support structure. Floating VAWTs experience increased motion in the frequency range surrounding the turbine [number of blades]×[rotational speed] frequency. For very large VAWTs with slower rotational speeds, this frequency range may significantly overlap with the range of wave excitation forces. Quantitative considerations are undertaken comparing the reference NREL 5 MW HAWT with the NOVA 5 MW VAWT.
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Zhao, Ming, Thomas Posenauer, and Ee Long Tan. "Effect of Yaw Angle on Large Scale Three-blade Horizontal Axis Wind Turbines." Hydro Science & Marine Engineering 4, no. 1 (2022): 8. http://dx.doi.org/10.30564/hsme.v4i1.4489.
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Offshore Horizontal Axis Wind Turbines (HAWT) are used globally as a source of clean and renewable energy. Turbine efficiency can be improved by optimizing the geometry of the turbine blades. Turbines are generally designed in a way that its orientation is adjustable to ensure the wind direction is aligned with the axis of the turbine shaft. The deflection angle from this position is defined as yaw angle of the turbine. Understanding the effects of the yaw angle on the wind turbine performance is important for the turbine safety and performance analysis. In this study, performance of a yawed HAWT is studied by computational fluid dynamics. The wind flow around the turbine is simulated by solving the Reynolds-Averaged Navier-Stokes equations using software ANSYS Fluent. The principal aim of this study is to quantify the yaw angle on the efficiency of the turbine and to check the accuracy of existing empirical formula. A three-bladed 100-m diameter prototype HAWT was analysed through comprehensive Computational Fluid Dynamics (CFD) simulations. The turbine efficiency reaches its maximum value of 33.9% at 0° yaw angle and decreases with the increase of yaw angle. It was proved that the cosine law can estimate the turbine efficiency with a yaw angle with an error less 10% when the yaw angle is between –30° and 30°. The relative error of the cosine law increase at larger yaw angles because of the power is reduced significantly.
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P.P., Dr Ritapure. "Design And Analysis of Modern Vertical Axis Wind Turbine (VAWT)." INTERANTIONAL JOURNAL OF SCIENTIFIC RESEARCH IN ENGINEERING AND MANAGEMENT 08, no. 04 (2024): 1–5. http://dx.doi.org/10.55041/ijsrem31233.
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With traditional energy sources running low, the world is turning more towards renewable energy, particularly wind power. But current wind turbines have their flaws. Enter the wind turbine tree, a potential solution to these issues. This study looks at various research papers on different wind turbine designs. After analysing them all, it's clear that wind turbine trees with Savonius blades are better than traditional bladed turbines. They take up less space and produce the same amount of power. This paper explores these findings and suggests that wind turbine trees could be the future of wind energy.. Keywords- Renewable Energy, Wind Turbine, wind Turbine Tree, Vertical axis wind turbine (VAWT), Horizontal axis wind turbine (HAWT), Computational fluid Dynamics (CFD).
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Nofirman Firdaus, Bambang Teguh Prasetyo, Hasnida Ab-Samat, et al. "Wind Energy Potential on A Highrise Building: A Preliminary Study." Journal of Advanced Research in Fluid Mechanics and Thermal Sciences 88, no. 3 (2021): 20–30. http://dx.doi.org/10.37934/arfmts.88.3.2030.
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Indonesia has an abundant renewable energy source. One of them is wind energy resources. Unfortunately, Indonesia's wind energy resource is not fully utilized, especially for application in high-rise buildings. The paper investigates the potential of energy production from the horizontal-axis wind turbine (HAWT) and the vertical-axis wind turbine (VAWT) on the rooftop of a university building in Indonesia. The wind speed data were measured on the rooftop of the building for seven months. The data was analyzed using Weibull distribution. Based on the probability density function of the Weibull distribution, the potential energy production was calculated using the power curves from the manufacturer. Comparing energy production between HAWTs and VAWTs has shown that VAWTs can produce more energy than HAWTs. Using six turbines, VAWTs can produce 48,476 kWh. On the other hand, with four turbines, HAWTs can produce 41,729 kWh. The reason is that VAWT requires shorter distance requirements for inter-turbine and between rows. Therefore, VAWT can use more turbines than HAWT in the limited area. In conclusion, VAWT for high-rise buildings is more preferred because VAWT can generate more energy. Further study should investigate the optimal configuration with varying the wind direction and quantifying the wake effect on power output.
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Mohan Kumar, Palanisamy, Krishnamoorthi Sivalingam, Teik-Cheng Lim, Seeram Ramakrishna, and He Wei. "Review on the Evolution of Darrieus Vertical Axis Wind Turbine: Large Wind Turbines." Clean Technologies 1, no. 1 (2019): 205–23. http://dx.doi.org/10.3390/cleantechnol1010014.
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The objective of the current review is to present the development of a large vertical axis wind turbine (VAWT) since its naissance to its current applications. The turbines are critically reviewed in terms of performance, blade configuration, tower design, and mode of failure. The early VAWTs mostly failed due to metal fatigue since the composites were not developed. Revisiting those configurations could yield insight into the future development of VAWT. The challenges faced by horizontal axis wind turbine (HAWT), especially in the megawatt capacity, renewed interest in large scale VAWT. VAWT provides a solution for some of the immediate challenges faced by HAWT in the offshore environment in terms of reliability, maintenance, and cost. The current rate of research and development on VAWT could lead to potential and economical alternatives for HAWT. The current summary on VAWT is envisioned to be an information hub about the growth of the Darrieus turbine from the kW capacity to megawatt scale.
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Young, Lien, Xing Zheng, and Erjie Gao. "Numerical Modeling and Application of Horizontal-Axis Wind Turbine Arrays in Large Wind Farms." Wind 3, no. 4 (2023): 459–84. http://dx.doi.org/10.3390/wind3040026.
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The global supply of energy is still tight, even with the rise of renewable energy utilization and abundant wind energy. More and more large wind farms have been installed globally. As of 2020, China’s total installed capacity accounted for 38.8%, far ahead of other countries. The layout of horizontal-axis wind turbine (HAWT) arrays in large wind farms poses three main issues: (1) How to select a site. (2) How to arrange the HAWT arrays to achieve greater power extraction at a specific wind farm. (3) How to reduce the noise generated by HAWTs. The numerical simulation of a HAWT wake field generally includes the analytical method (AM), vortex-lattice or vortex particle method (VM), panel method (PM), blade element momentum method (BEM), generalized actuator method (GAM), and direct modeling method (DM). Considering the computational cost, this paper combines DMs and mainly adopts the BEM-CFD coupling method, including uniform and non-uniform loading of axial force. Forty specially designed numerical experiments were carried out, which show that: (1) the BEM-CFD method greatly improves the calculation speed within the accuracy range of a thrust coefficient less than 2.5%, making it very suitable for the calculation of large wind farm HAWT arrays; (2) for regular HAWT arrays, it is reasonable to choose a 6D spacing in the wind direction and a 4D spacing in the crosswind direction for simplicity in practice.
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Bazrafshan, Jafar, Payam Sabaeifard, Farid Khalafi, and Majid Jamil. "CFD Calculation of Wind Turbines Power Variations in Urban Areas." Advanced Materials Research 622-623 (December 2012): 1084–88. http://dx.doi.org/10.4028/www.scientific.net/amr.622-623.1084.
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Integrating wind turbines in urban areas especially over buildings is a new way of producing electricity which is supported in recent years. Wind turbines sited well above the roof of buildings operate in skewed flow. In this paper, to examine variations in efficiency of wind turbines in this condition, two models of H-Rotor and horizontal axis wind turbine analyzed based on axial momentum theory through computer simulations. Simulations conducted through CFD method and k-ε turbulence model was utilized to analyze flow fluctuations in Navier-Stokes equations. Models show that, for an H-Rotor, the optimal power output in tilted flow can be up to two times the power output of horizontal axis wind turbine (HAWT).
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Tene Hedje, P., S. Zeoli, U. Vigny, F. Houtin-Mongrolle, P. Benard, and L. Bricteux. "Large Eddy Simulation of HAWT and VAWT performances in the vicinity of a building." Journal of Physics: Conference Series 2265, no. 4 (2022): 042078. http://dx.doi.org/10.1088/1742-6596/2265/4/042078.
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Abstract This work compares the performances of a Horizontal Axis Wind Turbine (HAWT) and a Vertical Axis Wind Turbine (VAWT) using Wall modeled Large Eddy Simulation (WMLES) coupled with an actuator line method. The wind turbines are located in the vicinity of a real size industrial building. Both wind turbines are sized to produce the same power at their respective optimum Tip Speed Ratio for a same incident wind speed. Two relevant incident wind directions (SW and SSW) are investigated, the influence of the building on the performance of the two wind turbines is also analysed. The results obtained show that the HAWT has a better overall performance compared to the VAWT. Overspeeds are observed for both directions analysed, due to the presence of the building which locally increases the flow velocity. However, these overspeeds remain low due to the low height of the building. The change of wind direction only slightly impacts the HAWT production, while the VAWT production remains insensitive. However, the presence of the building improves the global production of both wind turbines. Qualitatively, this change of wind direction induces a deviation in the wake of both turbines, which is greater for a SW direction.
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Budanko, Marina, and Zvonimir Guzović. "Design Methodology and Economic Impact of Small-Scale HAWT Systems for Urban Distributed Energy Generation." Machines 12, no. 12 (2024): 886. https://doi.org/10.3390/machines12120886.
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Integrating wind turbines within urban environments, either as building-mounted units or standalone installations, represents a valuable step toward sustainable city development. Vertical axis wind turbines (VAWTs) are commonly favored in these settings due to their ability to handle turbulent winds; however, they generally exhibit lower energy conversion efficiency compared to horizontal axis wind turbines (HAWTs). Selecting optimal urban or suburban locations with favorable wind conditions opens the possibility of deploying HAWTs, leveraging their higher efficiency even at comparable wind speeds. This paper presents a methodology for designing highly efficient HAWTs for urban use, supported by computational fluid dynamics (CFD) analyses to produce power curves and evaluate the energy conversion efficiency of both bare and augmented turbine designs. Differing from prior studies, this work also incorporates a detailed economic analysis, examining how reductions in the Levelized Cost of Energy (LCOE) enhance the cost-effectiveness of small-scale distributed wind systems. The findings offer insights into the technical and economic viability of small-scale HAWT configurations for distributed energy generation across diverse urban locations with varying wind profiles.
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Uzu-Kuei, Hsu, Tai Cheng-Hsien, HSU Chia-Wei, and Miau Jiun-Jih. "Numerical Studies on a NACA0018 Airfoil Blade HAWT with Trailing Edge Jet Flow." E3S Web of Conferences 64 (2018): 07008. http://dx.doi.org/10.1051/e3sconf/20186407008.
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This study analyzed an airfoil blade for a horizontal-axis wind turbine (HAWT) with a trailing-edge jet flow design. This design was realized by drilling a hole in the trailing edge of an NACA0018 blade of a conventional HAWT to serve as a pressure injection nozzle. Five inflow wind speeds and three trailing-edge jet flow conditions were examined in the test. The results revealed the efficiency differences between a HAWT with the new jet flow design and conventional HAWTs. The experimental methods employed involved a wind tunnel experiment and a computational fluid dynamics (CFD) simulation. The results revealed that when the inflow wind speed was low, the trailing-edge jet flow accelerated the initiation phase and increased the rotating speed of the HAWT; however, when the inflow wind speed was high, damping occurred and the rotating speed of the turbine blades decreased.
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Sanjibonny, Buragohain. "Analysis of Performance and Optimization Strategies for Horizontal Axis Wind Turbine (HAWT)." International Journal of Innovative Science and Research Technology 8, no. 5 (2023): 2414–20. https://doi.org/10.5281/zenodo.8015835.
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This research paper represents a comprehensive review of horizontal axis wind turbines (HAWTs), focusing on their design and performance analysis. HAWTs are one of the most widely used technologies for harnessing wind energy, and their efficient operation is crucial for maximizing energy generation. The paper discusses various aspects of HAWTs, including aerodynamics, structural design, control systems, and performance evaluation. By examining the latest advancements in HAWT technology, this study aims to provide valuable insights for researchers, engineers, and policymakers working in the field of renewable energy
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Hendriana, Dena, Eka Budiarto, Alexander Clements, and Arko Djajadi. "Design comparison of wind turbines for low wind speed." ICONIET PROCEEDING 2, no. 3 (2019): 222–29. http://dx.doi.org/10.33555/iconiet.v2i3.36.
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Wind energy is one of the potential renewable energy, but the applications have to beadjusted to the available wind characteristic in the area. In Indonesia, the wind speed is inaverage not very high, only around 4 m/s. Therefore the wind turbine design have to be adjustedfor usage in Indonesia. In this research, two wind turbine designs are compared. One design isof the form Horizontal-Axis Wind Turbine (HAWT) and the other is of the form Vertical-AxisWind Turbine (VAWT). Both designs are optimized for wind speed of 4 m/s. The comparisonsare done using computer simulation software OpenFOAM. The result shows VAWT design canproduce similar power with smaller turbine dimension than the HAWT design.
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Tittus, Paulaiyan, and Paul Mary Diaz. "Horizontal axis wind turbine modelling and data analysis by multilinear regression." Mechanical Sciences 11, no. 2 (2020): 447–64. http://dx.doi.org/10.5194/ms-11-447-2020.
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Abstract. The modelling of each horizontal axis wind turbine (HAWT) differs due to variation in operating conditions, dynamic parameters, and components. Thus, the choice of profiles also varies for specific applications. So for the better choice of profiles, the wind turbine performance is analysed for different parameters and working conditions. The efficiency of HAWTs mainly depends on the blade, which in turn is related to the profile of the blade, blade orientation, and tip size. Hence, the main aim of the present work is to evaluate the performance of HAWTs for three different blade tip sizes and six different blade twist angles for three major NACA (National Advisory Committee for Aeronautics) airfoils. A statistical analysis is also carried out to find the influence of different performance parameters such as drag, lift, vorticity, and normal force. The static design parameters are considered based on the available literature. A three-bladed offshore HAWT is adopted as the research object in the study. Data visualization using star glyphs and sunray plots is performed, along with multilinear regression analysis. From the multilinear regression analysis and reliable empirical correlations, it is known that drag coefficient and lift coefficient parameters have less significance in contrast to the other parameters which have more significance in the regression model. The different results obtained in terms of parametric coefficients provide an effective way to generate appropriate airfoil profiles for given HAWTs. Thus, the study helps to achieve better turbine performance, and it serves as a benchmark for future studies on HAWTs.
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Elmaryami, Abdlmanam S. A., Al Hussain A. Abdalrahman, Rahel G. Rahel, and Mahmoud Abdelrazek Ahmida. "Experimental Design of Small Horizontal Axis Wind Turbine for Home Electricity." European Modern Studies Journal 8, no. 6 (2024): 44–64. https://doi.org/10.59573/emsj.8(6).2024.5.
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In recent years, the energy production by wind turbines has been increasing, because its production is environmentally friendly; therefore, the technology developed for the production of energy through wind turbines brings great challenges in the investigation. The use of wind energy worldwide has overgrown in recent years to reduce greenhouse gas emissions. Wind power is free, but the installation and maintenance of wind turbines still remain costly. Wind vitality is the second biggest wellspring of sustainable power source after hydropower. However, it has not yet accomplished full matrix equality with fossil vitality sources. In this work experimental design of small HAWT for home electricity has been designed and analysed in the laboratory at the Libyan Academy for Postgraduate Studies, Al-Bayda-Libya. Experimental work was used in this paper to evaluate the wind energy data in Al-Bayda, East of Libya. The field tests and measurements proved that the present turbine is efficient and has long life-time and needs minimum maintenance. Wind turbines convert wind energy into electricity. The efficiency of this conversion is measured by comparing the incoming winds speed and the output power. From the experimental work it was found that the present turbine is efficient, easy to construct and assembly, has long life-time and needs minimum maintenance, suitable for different sites such as urban, suburban, rural, and sea coast and the output power of the turbine covers the consumption of many electric devices.
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Xia, Yaping, Minghui Yin, Ruiyu Li, De Liu, and Yun Zou. "Integrated structure and maximum power point tracking control design for wind turbines based on degree of controllability." Journal of Vibration and Control 25, no. 2 (2018): 397–407. http://dx.doi.org/10.1177/1077546318783363.
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A linearization model is obtained for a three-bladed horizontal-axis wind turbine (HAWT) consisting of blades and a drive-train. Sensitivity analysis of the degree of controllability (DOC) and maximum power point tracking (MPPT) efficiency with respect to the structural parameters of wind turbines is discussed by numerical simulations. It is observed from the simulation results that higher MPPT efficiency can be achieved with the increase of DOC. Based on the observation, this paper proposes a new integrated design method based on DOC to design and optimize the structural parameters of a HAWT. The designed turbine is tested by the commercial simulation software of wind turbines named Bladed. It is observed from simulations that when using the identical MPPT control strategy, the wind turbine whose structural parameters are optimized for a larger value of DOC can achieve higher MPPT performance.
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Anh, Nguyen Tuan, and Nguyen Huu Duc. "A STUDY ON POWER OUTPUT OF HORIZONTAL-AXIS WIND TURBINES UNDER RAIN." Vietnam Journal of Science and Technology 57, no. 3 (2019): 356. http://dx.doi.org/10.15625/2525-2518/56/3/12721.
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The power of the wind turbine are significantly affected by the air conditions of the operating environment. Rain is a widespread phenomenon in many parts of the world especially in Vietnam, so exploring its effect on the power of wind turbines will provide valuable insights into the design of a new wind tower. In this paper, a method and a model is developed to estimate the effect of precipitation by simulating the actual physical processes of the rain drops forming on the surface of the blades of horizontal-axis wind turbines (HAWT), thereby determining optimal wetness, then power and performance respectively. Consequently, it makes a contribution to operation and control strategies for horizontal-axis wind turbines.
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Zhao, Qiuying, Chunhua Sheng, and Abdollah Afjeh. "Computational Aerodynamic Analysis of Offshore Upwind and Downwind Turbines." Journal of Aerodynamics 2014 (October 29, 2014): 1–13. http://dx.doi.org/10.1155/2014/860637.
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Aerodynamic interactions of the model NREL 5 MW offshore horizontal axis wind turbines (HAWT) are investigated using a high-fidelity computational fluid dynamics (CFD) analysis. Four wind turbine configurations are considered; three-bladed upwind and downwind and two-bladed upwind and downwind configurations, which operate at two different rotor speeds of 12.1 and 16 RPM. In the present study, both steady and unsteady aerodynamic loads, such as the rotor torque, blade hub bending moment, and base the tower bending moment of the tower, are evaluated in detail to provide overall assessment of different wind turbine configurations. Aerodynamic interactions between the rotor and tower are analyzed, including the rotor wake development downstream. The computational analysis provides insight into aerodynamic performance of the upwind and downwind, two- and three-bladed horizontal axis wind turbines.
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Naji, Abdullah Mezaal, K. V. Osintsev, and S.V. Alyukov. "The computational fluid dynamics performance analysis of horizontal axis wind turbine." International Journal of Power Electronics and Drive System (IJPEDS) 10, no. 2 (2019): 1072–80. https://doi.org/10.11591/ijpeds.v10.i2.pp1072-1080.
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Computational fluid dynamics (CFD) simulations were performed in the present study using ANSYS Fluent 18.0, a commercially available CFD package, to characterize the behaviour of the new HAWT. Static threedimensional CFD simulations were conducted. The static torque characteristics of the turbine and the simplicity of design highlight its suitability for the GE 1.5xle turbine. The major factor for generating the power through the HAWT is the velocity of air and the position of the blade angle in the HAWT blade assembly. The paper presents the effect of The blade is 43.2 m length and starts with a cylindrical shape at the root then transitions to the airfoils S818, S825 and S826 for the root, body and tip respectively. This blade also has pitch to vary as a function of radius, giving it a twist and the pitch angle at the blade tip is 4 degrees. This blade was created to be similar in size to a GE 1.5xle turbine by Cornell University. In addition, note that to represent the blade being connected to a hub, the blade root is offset from the axis of rotation by 1 meter. The hub is not included in our model. The experimental analysis of GE 1.5xle turbine, so that possible the result of CFD analysis can be compared with theoretical calculations. CFD workbench of ANSYS is used to carry out the virtue simulation and testing. The software generated test results are validated through the experimental readings. Through this obtainable result will be in the means of maximum constant power generation from HAWT.
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Shirzadeh, Kamran, Horia Hangan, Curran Crawford, and Pooyan Hashemi Tari. "Investigating the loads and performance of a model horizontal axis wind turbine under reproducible IEC extreme operational conditions." Wind Energy Science 6, no. 2 (2021): 477–89. http://dx.doi.org/10.5194/wes-6-477-2021.
Full textAbstract:
Abstract. The power generation and loading dynamic responses of a 2.2 m diameter horizontal axis wind turbine (HAWT) under some of the IEC 61400-1 transient extreme operational conditions, more specifically extreme wind shears (EWSs) and extreme operational gust (EOG), that were reproduced at the WindEEE Dome at Western University were investigated. The global forces were measured by a multi-axis force balance at the HAWT tower base. The unsteady horizontal shear induced a significant yaw moment on the rotor with a dynamic similar to that of the extreme event without affecting the power generation. The EOG severely affected all the performance parameters of the turbine.
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Bai, C. J., and Y. C. Shiah. "Power-Curve Corrections for Horizontal-Axis Wind Turbine by an Improved Blade Element Momentum Theory." Journal of Mechanics 33, no. 3 (2016): 341–49. http://dx.doi.org/10.1017/jmech.2016.93.
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AbstractThis paper proposes a correction method to improve the accuracy of traditional blade element momentum theory (BEMT) in predicting the mechanical power and power coefficient of horizontal-axis wind turbine (HAWT) blade. In this paper, the traditional BEMT incorporated with the Viterna-Corrigan (VC) stall/stall-delay model is proposed to improve the accuracy of power-curve prediction, by which its applicability is thus enhanced. For verification of the proposed method, three distinct types of geometries of HAWT blades subjected to different operations are studied with outcomes compared with experimental data. Two different wind turbines developed by National Renewable Energy Laboratory (NREL) were tested at constant rotational speeds in a full-scale wind tunnel to acquire performance data. As a comparative platform, another wind turbine designed by BEMT for this study was also experimented in identical environment but at variable rotational speeds. As expected, the results clearly indicate that the power-curve prediction is effectively improved by the proposed method especially in the stall region when compared with experimental data. Indeed, this study shows that the improved BEMT is an ideal means to accurately predict the power-curve used for designing an optimal HAWT rotor.
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Bufares, Ahmed Mohamed, and Mohamed Salem Elmnefi. "Design and Performance of Horizontal Axis Wind Turbine Using Blade Element Momentum Theory (BEMT)." Applied Mechanics and Materials 492 (January 2014): 106–12. http://dx.doi.org/10.4028/www.scientific.net/amm.492.106.
Full textAbstract:
The design of blade of horizontal axis wind turbine (HAWT) has been conducted using model which developed based on blade element momentum theory. The performance of the turbine has been predicted using the same model. Moreover, the improvements of the model have been suggested. To accomplish the design and predict the performance of horizontal axis wind turbine, numerical code has been implemented; the performance of the turbine with and without improvements has been compared with published date. Based on the results presented more improvements have been suggested
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Mezaal, Naji Abdullah, Osintsev K. V., and Alyukov S.V. "The Computational fluid dynamics Performance Analysis of Horizontal Axis Wind Turbine." International Journal of Power Electronics and Drive Systems (IJPEDS) 10, no. 2 (2019): 1072. http://dx.doi.org/10.11591/ijpeds.v10.i2.pp1072-1080.
Full textAbstract:
<span lang="EN-US">Computational fluid dynamics (CFD) simulations were performed in the present study using ANSYS Fluent 18.0, a commercially available CFD package, to characterize the behaviour of the new HAWT. Static three-dimensional CFD simulations were conducted. The static torque characteristics of the turbine and the simplicity of design highlight its suitability for the GE 1.5xle turbine. The major factor for generating the power through the HAWT is the velocity of air and the position of the blade angle in the HAWT blade assembly. The study presents the effect of The blade is 43.2 meters long and starts with a cylindrical shape at the root and then transitions to the airfoils S818, S825 and S826 for the root, body and tip, respectively. This blade also has pitch to vary as a function of radius, giving it a twist and the pitch angle at the blade tip is 4 degrees. This blade was created to be similar in size to a GE 1.5xle turbine by Cornell University [1]. In addition, note that to represent the blade being connected to a hub, the blade root is offset from the axis of rotation by 1 meter. The hub is not included in our model. The experimental analysis of GE 1.5xle turbine, so that possible the result of CFD analysis can be compared with theoretical calculations. CFD workbench of ANSYS is used to carry out the virtue simulation and testing. The software generated test results are validated through the experimental readings. Through this obtainable result will be in the means of maximum constant power generation from HAWT.</span>
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Le-Duc, Thang, and Quoc-Hung Nguyen. "Aerodynamic Optimal Design for Horizontal Axis Wind Turbine Airfoil Using Integrated Optimization Method." International Journal of Computational Methods 16, no. 08 (2019): 1841004. http://dx.doi.org/10.1142/s0219876218410049.
Full textAbstract:
In this work, a new approach for aerodynamic optimization of horizontal axis wind turbine (HAWT) airfoil is presented. This technique combines commercial computational fluid dynamics (CFD) codes with differential evolution (DE), a reliable gradient-free global optimization method. During the optimization process, commercial CFD codes are used to evaluate aerodynamic characteristics of HAWT airfoil and an improved DE algorithm is utilized to find the optimal airfoil design. The objective of this research is to maximize the aerodynamic coefficients of HAWT airfoil at the design angle of attack (AOA) with specific ambient environment. The airfoil shape is modeled by control points which their coordinates are design variables. The reliability of CFD codes is validated by comparing the analytical results of a typical HAWT airfoil with its experimental data. Finally, the optimal design of wind turbine airfoil is evaluated about aerodynamic performance in comparison with existing airfoils and some discussions are performed.
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El-Fahham, Ibrahim, George Abdelshahid, and Ossama Mokhiamar. "Pitch Angle Modulation of the Horizontal and Vertical Axes Wind Turbine Using Fuzzy Logic Control." Processes 9, no. 8 (2021): 1337. http://dx.doi.org/10.3390/pr9081337.
Full textAbstract:
The aim of this research work is to modulate the pitch angle of both types of wind turbines based on fuzzy logic control (FLC), as changes in the pitch angle have various functions in horizontal and vertical axis wind turbines. For HAWT, pitch angle control is applied to shield the electrical components of the turbine when the wind speed exceeds the rated speed without shutting down the turbine. FLC is used to control the angular velocity using two inputs and one output with three membership functions for both inputs and output. In VAWT, pitch angle control is applied to boost the performance of the turbine and its self-starting torque. FLC utilizes two inputs and one output with five membership functions for both inputs and output. For both turbine types, FLC produces a control signal that drives the actuator to achieve the desired pitch angle. The dynamics of HAWT and VAWT are simulated by the MATLAB/Simulink to demonstrate the influence of pitch controls on their dynamics. For HAWT, the FLC control has successfully maintained the angular speed of the rotor. The values of tip speed ratio and coefficient of performance are reduced in order to maintain the rotor angular velocity at its rated value. On the other hand, the results showed that the torque produced by the VAWT individual blade has improved with the pitch angle control. In addition, using FLC to control the pitch angle gives enhanced output and higher Cp at low tip speed ratios. Gain schedule PI controller is also used in both HAWT and VAWT for comparative study.
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Iliyasu, I., I. Iliyasu, IK Tanimu, and DO Obada. "PRELIMINARY MULTIDOMAIN MODELLING AND SIMULATION STUDY OF A HORIZONTAL AXIS WIND TURBINE (HAWT) TOWER VIBRATION." Nigerian Journal of Technology 36, no. 1 (2016): 127–31. http://dx.doi.org/10.4314/njt.v36i1.16.
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Renewable energy sources have gained much attention due to the recent energy crisis and the urge to get clean energy. Among the main options being studied, wind energy is a strong contender because of its reliability due to the maturity of the technology, good infrastructure and relative cost competitiveness. It is also interesting to note that there are physical limits to the potential height of a wind turbine tower since the mechanical structure of wind turbines are thus very flexible and tend to oscillate. This makes the design of wind turbines a demanding task. In this paper, the oscillation of a wind turbine tower due to imbalance in the masses of the blades is modeled in maplesim and the effect of the tower height on its oscillation was simulated. For a wind turbine with three rotor blades, two of which have masses of 10 kg, a mass moment of inertia of approximately 20 kg/m2 and one of the blades has a moment of inertia which is 1% less than the other blades. The simulation showed the most stable system for the most energy capture for this case study to be a rotor speed of 5.5rad/s at a height of 10m. At this angular frequency the deflection of the top of the wind turbine was approximately 1mm. http://dx.doi.org/10.4314/njt.v36i1.16
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Castellani, Francesco, Davide Astolfi, Matteo Becchetti, and Francesco Berno. "Experimental and Numerical Analysis of the Dynamical Behavior of a Small Horizontal-Axis Wind Turbine under Unsteady Conditions: Part I." Machines 6, no. 4 (2018): 52. http://dx.doi.org/10.3390/machines6040052.
Full textAbstract:
An efficient and reliable exploitation of small horizontal-axis wind turbines (HAWT) is a complex task: these kinds of devices actually modulate strongly variable loads with rotational speeds of the order of hundreds of revolutions per minute. The complex flow conditions to which small HAWTs are subjected in urban environments (sudden wind direction changes, considerable turbulence intensity, gusts) make it very difficult for the wind turbine control system to optimally balance the power and the load. For these reasons, it is important to comprehend and characterize the behavior of small HAWTs under unsteady conditions. On these grounds, this work is devoted to the formulation and realization of controlled unsteady test conditions for small HAWTs in the wind tunnel. The selected test case is a HAWT having 3 kW of maximum power and 2 m of rotor diameter: in this work, this device is subjected to oscillating wind time series, with a custom period. The experimental analysis allows therefore to characterize how unsteadiness is amplified moving from the primary resource (the wind) through the rotor revolutions per minute to final output (the power), in terms of delay and amplitude magnification. This work also includes a numerical characterization of the problem, by means of aeroelastic simulations performed with the FAST software. The comparison between experiments and numerical model supports the fact that the fast transitions are mainly governed by the aerodynamic and mechanical parameters: therefore, the aeroelastic modeling of a small HAWT can be useful in the developing phase to select appropriately the design and the control system set up.
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Yirijor, John, and Nana Asabere Siaw-Mensah. "Design and Optimisation of Horizontal Axis Wind Turbine Blades Using Biomimicry of Whale Tubercles." Journal of Engineering Research and Reports 25, no. 5 (2023): 100–112. http://dx.doi.org/10.9734/jerr/2023/v25i5915.
Full textAbstract:
Wind speed is the major factor in generating power in a wind turbine. However, due to the non-optimum and redundant design of wind turbine blades, not nearly enough wind is captured for utilization. In the present study, modifications were done on the leading edge of the HAWT blade using tubercles showing their effects on aerodynamic performances. From this research, the following results found concerning the performances of HAWT with leading-edge tubercles were that; blades with tubercles on the leading edge will have superior performance in the post-stall regime by 27%, tubercles with a smaller amplitude and lower wavelength will produce higher lift and lower drag in the low wind speed condition, and tubercle blade will have a stable and smooth performance in varying wind speed conditions, producing higher torque and power at low wind speed. Using a small wind turbine model, SolidWorks Motion Analysis Simulation was used for dynamic modeling to evaluate and determine the force and torque of the mechanical structure. These results were compared and examined using standard wind turbine blades which showed an improvement of 30% in efficiency.
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Blondel, Frédéric, Pierre-Antoine Joulin, and Caroline Le Guern. "Towards vortex-based wind turbine design using GPUs and wake accommodation." Journal of Physics: Conference Series 2767, no. 5 (2024): 052016. http://dx.doi.org/10.1088/1742-6596/2767/5/052016.
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Abstract Vortex methods are often cited as a promising alternative to the classical Blade Element Momentum (BEM) theory for wind turbine design, overcoming some of its limitations such as imposing steady-state, uniform, and aligned inflows. BEM assumptions are being questioned, especially for large rotors with very flexible blades or even floating wind turbines. However, vortex methods are not yet widespread due to their computational costs. The following work demonstrates how free vortex wake methods using filament discretizations can become an affordable and viable alternative to BEM. This is achieved by combining filament number reduction as well as graphical processing units (GPUs) computations. The efficiency and accuracy of the proposed approaches are demonstrated against simple test cases, including an elliptical wing and a rigid horizontal axis wind turbine (HAWT). Finally, the approaches are applied to the aero-hydro-servo-elastic simulation of floating horizontal axis wind turbines.
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Radi, Jinane, and Abdelouahed Djebli. "Optimal design of an horizontal axis wind turbine using blade element momentum theory." E3S Web of Conferences 336 (2022): 00008. http://dx.doi.org/10.1051/e3sconf/202233600008.
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The aerodynamic modelling of the wind turbine blades is a vital step in the design of the turbine. Several design methods are available for the aerodynamic design of the rotor, however, in this study a mathematical model based on blade element momentum concept is applied. the purpose of this work is to optimize the distribution of chord and twist angle along the blade span of a 20 KW HAWT using the BEM method, the blade design parameters such as the optimum lift and drag coefficient , chord and twist angle, the axial induction factor(a) and the angular induction factor(a’) of the designed HAWT are codified and estimated using the MATLAB software. The results of the analysis show on the one hand a decrease in chord length and twist angle along the blade length and on the other hand the maximum values that can be achieved by the axial and angular inductions factors are respectively 0.3325 and 0.175. This approach can be effectively implemented for the analysis of HAWTs operating at different characteristics of the designed blade.
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Li, De Shun, and Ren Nian Li. "Field Experiment of Blade Surface Pressure of a HAWT." Applied Mechanics and Materials 291-294 (February 2013): 445–49. http://dx.doi.org/10.4028/www.scientific.net/amm.291-294.445.
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Field experimental study is performed on a 33 kW horizontal axis wind turbine with rotor diameter of 14.8 m. The distribution of pressure is gathered by disposed 191 taped pressure sensors span-ward on seven particular sections of a blade. The results will provide a comparative basis to wind tunnel experiment and numerical calculation of the flow of the wind turbine.
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I., H. Hamzah, H. Roslan M., A. Malik A., W. M. Saad N., and F. A. Rahim A. "Development and analysis of vawt offgrid in ducting system." International Journal of Power Electronics and Drive System (IJPEDS) 11, no. 3 (2020): 1298–304. https://doi.org/10.11591/ijpeds.v11.i3.pp1298-1304.
Full textAbstract:
Horizontal Axis Wind Turbine (HAWT) had been widely used in Malaysia, however, research concluded that the power produced is still low which approximately 0.02% from the wind turbine input is. The average wind speed in Penang, Malaysia, is recorded between 1.0 m/s to 2.5 m/s whereby to produce 2.7 kW of power by HAWT, 12.0 m/s of average wind speed is needed. Therefore, the main objective in this project is to develop and analyse the suitability on the Vertical Axis Wind Turbine (VAWT) to be used for power generation with the wind speed in between 0.5 m/s to 3.0 m/s. Ducting system is chosen rather than the open air since commercial buildings used Heat Ventilation Air Conditioning (HVAC) system. Arduino microcontroller and LabVIEW is used as interfaced to setup two types of sensors that is temperature sensor and anemometer.
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Yan, Cuicui, and Honglin Zhang. "The comparison of power capability between towed kite and horizontal axis fan." Journal of Physics: Conference Series 2087, no. 1 (2021): 012063. http://dx.doi.org/10.1088/1742-6596/2087/1/012063.
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Abstract Airborne Wind Energy (AWE) mainly collects wind energy by tethered aircraft at a certain altitude. This paper discusses the recent development of AWE. The actuator disc theory is adopted to consider the influence of kites on wind flow obstruction. The difference of working mode between a horizontal-axis wind turbine (HAWT) and a crosswind kite power systems (CKPS) is compared, the power limit of HAWT and CKPS is calculated, and the reason of the limit power is analyzed. It is pointed out that CKPS has a wider range of flight and should be further analyzed and calculated rather than simply generalized by the system disk theory.
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Maw, Yu Yu, and Min Thaw Tun. "SENSITIVITY ANALYSIS OF ANGLE, LENGTH AND BRIM HEIGHT OF THE DIFFUSER FOR THE SMALL DIFFUSER AUGMENTED WIND TURBIN." ASEAN Engineering Journal 11, no. 4 (2021): 280–91. http://dx.doi.org/10.11113/aej.v11.18102.
Full textAbstract:
This paper presents the performance of the diffuser augmented wind turbine (DAWT) with the various diffuser shapes using the numerical investigations. DAWT is also a type of wind turbine and the diffuser shapes, the nozzle shapes and the cylindrical shapes are commonly inserted around the horizontal axis wind turbine (HAWT) to become the more efficient wind turbine. The aim of this study is to find the more efficient design of the diffuser for the horizontal axis wind turbine using the numerical investigations. In this research, the converging and diverging diffuser shape is inserted and the airfoil design is calculated by using the Blade Elementary Momentum Theory. The airfoil type NACA 4412 is chosen because it is suitable for the low wind speed area and easy to produce. The turbulent model k-ω is combined with the Navier Stoke equation to solve the 3-dimensional steady flow simulation of the diffuser augmented wind turbine using the Computational Fluid Dynamics (CFD) simulations. The numerical investigation is used to compare and predict the power coefficient of the DAWT with various shapes. The baseline design of the diffuser (L = 170 mm, H = 57 mm and α = 11̊) is firstly investigated. To predict the power coefficient of the various diffuser shapes, the range of the length of the diffuser is (L/D = 0.5 to 1.5), the range of the brim height of the diffuser (H/D = 0.1 to 0.35) and the range of the angle of the diffuser (α = 5̊ to 15̊ ) are also investigated. The parameters of the diffuser shapes are assigned by using the Central Composite Design Face Centered Method. The response surface method is also used to predict the most efficient diffuser design. The performance of the horizontal axis wind turbine, that of the diffuser augmented wind turbine and that of the diffuser augmented wind turbine with various shapes of diffuser are compared. The performance of new diffuser augmented wind turbine (IND_009) is 50% and 55% higher than the baseline diffuser augmented wind turbine and the horizontal axis wind turbine at rated velocity. The flow visualization of the HAWT, DAWTs are also discussed.
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Castellani, Francesco, Davide Astolfi, Francesco Natili, and Francesco Mari. "The Yawing Behavior of Horizontal-Axis Wind Turbines: A Numerical and Experimental Analysis." Machines 7, no. 1 (2019): 15. http://dx.doi.org/10.3390/machines7010015.
Full textAbstract:
The yawing of horizontal-axis wind turbines (HAWT) is a major topic in the comprehension of the dynamical behavior of these kinds of devices. It is important for the study of mechanical loads to which wind turbines are subjected and it is important for the optimization of wind farms because the yaw active control can steer the wakes between nearby wind turbines. On these grounds, this work is devoted to the numerical and experimental analysis of the yawing behavior of a HAWT. The experimental tests have been performed at the wind tunnel of the University of Perugia on a three-bladed small HAWT prototype, having two meters of rotor diameter. Two numerical set ups have been selected: a proprietary code based on the Blade Element Momentum theory (BEM) and the aeroelastic simulation software FAST, developed at the National Renewable Energy Laboratory (NREL) in Golden, CO, USA. The behavior of the test wind turbine up to ± 45 ∘ of yaw offset is studied. The performances (power coefficient C P ) and the mechanical behavior (thrust coefficient C T ) are studied and the predictions of the numerical models are compared against the wind tunnel measurements. The results for C T inspire a subsequent study: its behavior as a function of the azimuth angle is studied and the periodic component equal to the blade passing frequency 3P is observed. The fluctuation intensity decreases with the yaw angle because the distance between tower and blade increases. Consequently, the tower interference is studied through the comparison of measurements and simulations as regards the fore-aft vibration spectrum and the force on top of the tower.
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Hamzah, Irni Hamiza, M. H. Roslan, A. A. Malik, N. W. M. Saad, and A. F. A. Rahim. "Development and analysis of VAWT offgrid in ducting system." International Journal of Power Electronics and Drive Systems (IJPEDS) 11, no. 3 (2020): 1298. http://dx.doi.org/10.11591/ijpeds.v11.i3.pp1298-1304.
Full textAbstract:
Horizontal Axis Wind Turbine (HAWT) had been widely used in Malaysia, however, research concluded that the power produced is still low which approximately 0.02% from the wind turbine input is. The average wind speed in Penang, Malaysia, is recorded between 1.0 m/s to 2.5 m/s whereby to produce 2.7 kW of power by HAWT, 12.0 m/s of average wind speed is needed. Therefore, the main objective in this project is to develop and analyse the suitability on the Vertical Axis Wind Turbine (VAWT) to be used for power generation with the wind speed in between 0.5 m/s to 3.0 m/s. Ducting system is chosen rather than the open air since commercial buildings used Heat Ventilation Air Conditioning (HVAC) system. Arduino microcontroller and LabVIEW is used as interfaced to setup two types of sensors that is temperature sensor and anemometer.
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Douvi, Dimitra, Eleni Douvi, and Dionissios Margaris. "Aerodynamic Performance of a Horizontal Axis Wind Turbine Operating with Dust—A Computational Study." Inventions 8, no. 1 (2022): 3. http://dx.doi.org/10.3390/inventions8010003.
Full textAbstract:
The main purpose of this study is to develop an understanding of the aerodynamic performance of a horizontal axis wind turbine (HAWT) operating in a dusty environment, with various concentration of dust in the flow domain. The computational analysis was accomplished by the commercial computational fluid dynamics (CFD) code ANSYS Fluent 16.0. Initially, a user-friendly developed application was utilized for the optimum blade geometry special characteristics calculation. The design of the HAWT rotor and meshing of the computational domain follows. The moving reference frame (MRF) model was applied for the rotary motion of the blades, the dust was added in the computational domain by the discrete phase model (DPM) and SST k–ω turbulence model was enabled. The power output of the studied HAWT, operating in several dusty environments, was estimated and compared with the power output of a particular HAWT in clean air. The flow field around the HAWT rotor, including the contours of pressure, particles dissipation rate and erosion rate on both blade sides, are shown. In general, it is concluded that the operation of a HAWT in a dusty environment results in degraded performance, due to the particles deposition on the blades.
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Younoussi, Somaya, and Abdeslem Ettaouil. "Numerical Study of a Small Horizontal-Axis Wind Turbine Aerodynamics Operating at Low Wind Speed." Fluids 8, no. 7 (2023): 192. http://dx.doi.org/10.3390/fluids8070192.
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The present work aims to study the aerodynamic characteristics of a newly designed three-bladed horizontal-axis wind turbine (HAWT) using the Computational Fluid Dynamic (CFD) method. The blade geometry is designed using an improved Blade Element Momentum (BEM) method to be similar in size to the Ampair300 wind turbine. The shear stress transport (SST) transition turbulence model closure is utilized to solve the steady state three-dimensional Reynolds Averaged Navier-Stokes (RANS) equations. The Ansys Fluent CFD solver is used to solve the problem. Then, a comparison between the two turbines’ operating conditions is conducted by monitoring the pressure coefficient, pressure contours and velocity vectors at five different radial positions. The analysis of the Tip Speed Ratio (TSR) effects on the turbine efficiency and on the flow behavior on the blade and in the near wake is carried out. For 8 m/s wind speed, the optimum pitch angle is also investigated, and the results are prepared against each TSR.
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Noronha, Naveen Prakash, and Krishna M. "Design and analysis of micro horizontal axis wind turbine using MATLAB and QBlade." International Journal of Advanced Science and Technology 29, no. 10S (2020): 8877–85. https://doi.org/10.5281/zenodo.3950305.
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The objective of the present work is to design a 300W micro horizontal axis wind turbine (HAWT) using BEM theory. The design procedure is codified in MATLAB to simplify the routines. SG6040 and SG6041 airfoils are chosen as the hub and tip airfoils respectively while intermediate airfoils are interpolated between the hub and tip airfoils. The design parameters like tip speed ratio, wind speed, and power produced are considered for the design. The average wind speed is assumed to be 5m/s based on the local wind speed data collected for a certain period of time. BEM procedure codified in MATLAB software is used to obtain the preliminary blade design parameters such as optimum drag and lift coefficients at various angles of attack, chord, twist, axial induction factor (a) and angular induction factor (a’). The QBlade analysis of 3m diameter wind turbine is carried out at a wind speed of 5 m/s. The results of the analysis show a maximum annual energy production (AEP) of 538kWh and a maximum torque of 15 Nm. This procedure could be effectively adopted for the design and analysis of HAWTs operating at higher wind speeds.
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Suryanarayanan, Shashikanth, and Amit Dixit. "A Procedure for the Development of Control-Oriented Linear Models for Horizontal-Axis Large Wind Turbines." Journal of Dynamic Systems, Measurement, and Control 129, no. 4 (2006): 469–79. http://dx.doi.org/10.1115/1.2745852.
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In this work we describe a methodology to construct control-oriented, multi-input, multi-output linear models representing the dynamics of variable-speed, pitch-controlled horizontal-axis wind turbines (HAWT). The turbine is treated as an interconnection of mechanical elements with distributed mass, damping, and stiffness characteristics. The behavior of the structural components of the turbine is approximated as that of their dominant modes and the wind-blade aerodynamic interaction is modeled using the Blade Element Momentum (BEM) theory. The modeling procedure explicitly exploits the horizontal-axis configuration and constraints imposed thereof. The models developed using the outlined procedure are parametrized based on a handful of parameters that are often used to specify mass/stiffness distributions and geometry. The predictions of the linear models so constructed are validated against that of an established nonlinear model. The use of the modeling procedure in addressing problems of immediate interest to the wind turbine industry is presented.
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Sutrisno, Sigit Iswahyudi, and Setyawan Wibowo. "Dimensional Analysis of Power Prediction of a Real-Scale Wind Turbine Based on Wind-Tunnel Torque Measurement of Small-Scaled Models." Energies 11, no. 9 (2018): 2374. http://dx.doi.org/10.3390/en11092374.
Full textAbstract:
A preliminary study of a horizontal-axis wind turbine (HAWT) design is carried out using a wind tunnel to obtain its aerodynamic characteristics. Utilization of data from the study to develop large-scale wind turbines requires further study. This paper aims to discuss the use of wind turbine data obtained the wind-tunnel measurements to estimate the characteristics of wind turbines that have field size. One should measure the torque of two small-scale turbines inside the wind tunnel. The first small-scale turbine has a radius of 0.14 m, and the radius of the second small turbine is 0.19 m. Torque measurement results from both turbines were analyzed using the Buckingham π theorem to obtain a correlation between torsion and diameter variations. The obtained correlation equation was used to estimate the field measurement of turbine power with a radius of 1.2 m. The resulting correlation equation can be applied to approximate the energy generated by the turbine using the size of the field well in the operating area and the tip-speed ratio (λ) of the turbine design.
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Muhammad Al,Ain Mat Zin, Izuan Amin Ishak, Mohammad Arafat, Nor Afzanizam Samiran, and Norain Sahari. "Impact Tip Speed Ratio in Performance Analysis for Horizontal Axis Wind Turbine (HAWT) with Optimal Twist and Tapered (OPT) Blade Shape." CFD Letters 16, no. 8 (2024): 18–32. http://dx.doi.org/10.37934/cfdl.16.8.1832.
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Performance for Horizontal Axial Wind Turbine (HAWT) is influenced by the difference in tip speed ratio (TSR) and mesh distribution. The objective of this article is to study the optimal performance of wind turbines when subjected to different mesh resolution, TSR and wind speed velocity.Therefore, it is important to study the effects of different mesh resolutions in terms of wind turbine performance. To achieve that, a 0.65m optimal twist and tapered (OPT) blade is used with various inlet velocities and TSR. This study uses the k-ꞷ shear-stress transport (SST) based Reynold-Average Navier Stokes (RANS) approach in commercial ANSYS Fluent CFD software. This simulation was performed using the Moving Ratio Frame (MRF) method. To find the optimum grid resolution, a Grid Independence Test (GIT) was conducted comparing the coefficient of power (Cp). From the RESULT, TSR 6 shows the best HAWT performance when Cp for inlet velocity 8 m/s is 0.2608.
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Yao, Qi, Ying Xue Yao, Liang Zhou, and Zhi Peng Tang. "The Development of the Efficiency Enhancement Mechanism of the Vertical Axis Wind Turbine." Key Engineering Materials 499 (January 2012): 336–41. http://dx.doi.org/10.4028/www.scientific.net/kem.499.336.
Full textAbstract:
The energy issue has been the focus of world’s attention. Wind plays a crucial role in the development and application of new energy as a renewable and clean energy. Wind turbine is the core component of the wind power system. It usually can be divided into horizontal axis wind turbine (HAWT) and vertical axis wind turbine (VAWT) by the relative position of the spindle and the ground. This paper analyzes the advantages and disadvantages of VAWT and summarizes the improvement of the VAWT from the energy congregating technology and self-starting technology which can provide technical support for the research of VAWT in the future.
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Sari, Dewi Puspita, Djoko Setyanto, Rexon Harris Simanjuntak, et al. "COMPARATIVE BLADES NUMBER HORIZONTAL AXIS WIND TURBINES IN PROFILE NACA 0012 USING CFD SIMULATION." Indonesian Journal of Engineering and Science 6, no. 2 (2025): 069–79. https://doi.org/10.51630/ijes.v6i2.170.
Full textAbstract:
This study explores the effect of blade count on the performance of low-scale horizontal axis wind turbines (HAWT) with NACA 0012 profiles using Computational Fluid Dynamics (CFD) methods. The results show that the turbine with three blades achieves the highest efficiency, with a power coefficient (Cp) of 0.54 at a Tip-Speed Ratio (TSR) of 7, while the four-blade turbine reaches a Cp of 0.48 at a TSR of 6. The mechanical power produced by the three-blade turbine is 1,040.81 W, 28% higher than that of the four-blade turbine (927.28 W). The progressive distribution of the pitch angle in the three-blade turbine minimizes the risk of stall and flow separation. These findings suggest that fewer blades can reduce flow interference and vortex-induced losses, making it an efficient solution for the wind energy potential in Indonesia. Future research should explore geometric and material variations for further optimization.