Parametric Analysis Using CFD to Study the Impact of Geometric and Numerical Modeling on the Performance of a Small Scale Horizontal Axis Wind Turbine

The reliance on Computational Fluid Dynamics (CFD) simulations has drastically increased over time to evaluate the aerodynamic performance of small-scale wind turbines. With the rapid variability in customer demand, industrial requirements, economic constraints, and time limitations associated with the design and development of small-scale wind turbines, the trade-off between computational resources and the simulation’s numerical accuracy may vary significantly. In the context of wind turbine design and analysis, high fidelity simulation under full geometric and numerical complexity is more accurate but pose significant demands from a computational standpoint. There is a need to understand and quantify performance deterioration of high fidelity simulations under reduced geometric or numerical approximation on a single small scale turbine model. In the present work, the flow past a small-scale Horizontal Axis Wind Turbine (HAWT) was simulated under various geometric and numerical configurations. The geometric complexity was varied based on stationary and rotating turbine conditions. In the stationary case, simple 2D airfoil, 2.5D blade, 3D blade sections are evaluated, while rotational effects are introduced for the configuration 3D blade, rotor only, and the full-scale wind turbine with and without the inclusion of a nacelle and tower. In terms of numerical complexity, the Single Reference Frame (SRF), Multiple Reference Frames (MRF), and the Sliding Meshing Interface (SMI) is analyzed over Tip Speed Ratios (TSR) of 3, 6, 10. The quantification of aerodynamic coefficients of the blade (Cl, Cd) and turbine (Cp, Ct) was conducted along with the discussion on wake patterns in comparison with experimental data.

Ducted Wind Turbine in Generating Set Air Flow

The growing need to use renewable sources and the current difficulty in spreading the electricity grid in a widespread manner raise the question of how to respond to the need for more electricity immediately. The idea behind this study is to power a horizontal axis wind turbine with the air flow generated for cooling a stationary internal combustion engine. The power extracted from this solution is significantly lower than that of the internal combustion engine (about 0.3%) and could be advantageous only in limited contexts. Installation costs are limited because many elements deriving from wind variability can be removed or simplified.

Life Cycle Assessment of 2.0 MW Horizontal Axis Wind Turbine for Sustainability Analysis

The world is increasingly experiencing unanticipated catastrophic events because of the impact of greenhouse gasses. The two major issues with the conventional energy system are unsustainability and global warming, which are extremely harmful for the climate. The core objective of this study is a compilation of the findings related to a life cycle assessment of horizontal axis wind turbines in regard to sustainable development. Sustainability aspects and concerns have been studied and reported in terms of the life cycle of wind energy technology. This article focused on energy consumed during the life of the 2.0 MW wind turbine, mostly in the production of primary materials, processes, and maintenance-related transport phase. The turbine’s overall energy produced 1,750,000 kWh throughout a 20-year life. Over a 20year lifespan, the overall energy produced by the turbine is approximately 32% more than the energy needed to construct, and the destination for the turbine materials is a landfill at the end of the turbine’s life. For a 40% wind turbine power ratio, with the wind turbine materials delivered to landfill at the end of the turbine’s life, the electricity payback period is around 10 months, and for recycled materials it is 6 months. The comparison is also done for the wind turbine materials which are sent to landfill with and without recycling.

Manufaktur Bilah Horizontal Axis Wind Turbine (HAWT) Tipe Taperless Menggunakan Airfoil S3024 dengan Daya 500 WATT di PT. Lentera Bumi Nusantara

Energi angin merupakan salah satu sumber energi alternatif terbarukan yang ramah lingkungan. Seperti di Indonesia angin sangat berpotensial untuk dimanfaatkan, mengingat ketersediaan bahan bakar fosil yang terus semakin menipis. Untuk mengonversi energi angin menjadi energi listrik membutuhkan sebuah teknologi yang bernama turbin angin atau yang sering disebut kincir angin. Turbin angin memiliki tipe ada yang horisontal dan vertikal. Salah satu jenis turbin angin yang memiliki effisiensi Cp cukup tinggi adalah turbin angin tipe 3 blade propeller yaitu mendekati 45%. Semakin tinggi effisiensi suatu turbin maka semakin bagus dan maksimal juga dalam melakukan pengkonversi energi angin.sehingga ada kemungkinan pengembangan teknologi agar menghasilkan energi listrik yang optimal.Oleh sebab itu pada penelitian ini di lakukanlah manufaktur bilah dengan airfoil S3024 bilah berjenis taperless untuk turbin angin HAWT (Horizontal Axis Wind Turbin). Penelitian ini di lakukan dalam 3 tahap. Tahap yang pertama adalah perancangan, pada tahap ini penulis mengumpulkan data data hasil perancangan seperti data hasil akhir perhitungan, hasil simulasi kemudian melakuan perancangan desain 3D dan 2D. Kedua melakuan pemilihan material yang akan di gunakan untuk turbin angin. Tahap ketuga yaitu melakukan proses manufaktur bilah. Hasil manufaktur bilah taperless dengan airfoil S3024 untuk Turbin angin HAWT (Horizontal Axis Wind Turbin) bahan yang digunakan adalah kayu mahoni kemudian di dapat panjang jari-jari 0.8 m, chord linear dari 0,12 m, sudut puntir 10.270 – 5,370.

Study on Structural Performance of Horizontal Axis Wind Turbine with Air Duct for Coal Mine

Considering the characteristics of narrow underground space and energy distribution, based on blade element momentum theory, Wilson optimization model and MATLAB programming calculation results, the torsion angle and chord length of wind turbine blade under the optimized conditions were obtained. Through coordinate transformation, the data were transformed into three-dimensional form. The three-dimensional model of the blade was constructed, and the horizontal axis wind turbine blade under the underground low wind speed environment was designed. The static structural analysis and modal analysis were carried out. Structural design, optimization calculation and aerodynamic analysis were carried out for three kinds of air ducts: external convex, internal concave and linear. The results show that the velocity distribution in the throat of linear air duct is relatively uniform and the growth rate is large, so it should be preferred. When the tunnel wind speed is 4.3 m/s and the rated speed is 224 rad/s, the maximum displacement of the blade is in the blade tip area and the maximum stress is at the blade root, which is not easy to resonate. The change rate of displacement, stress and strain of blade is positively correlated with speed. The energy of blade vibration is mainly concentrated in the swing vibration of the first and second modes. With the increase in vibration mode order, the amplitude and shape of the blade gradually transition to the coupling vibration of swing, swing and torsion. The stress and strain of the blade are lower than the allowable stress and strain of glass fiber reinforced plastics (FRP), and resonance is not easy to occur in the first two steps. The blade is generally safe and meets the design requirements.