Optimasi Desain Profil Blade Savonius Vertical Axis Wind Turbine Tipe Bach dengan Metode Grafis Interpolasi Cubic Spline

Risdhian, Vava Muhammad (2023) Optimasi Desain Profil Blade Savonius Vertical Axis Wind Turbine Tipe Bach dengan Metode Grafis Interpolasi Cubic Spline. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Savonius Vertical Axis Wind Turbine (VAWT) adalah salah satu jenis peralatan rotating yang dapat mengonversi energi kinetik angin menjadi energi listrik. Kelebihan turbin angin tipe ini adalah desain yang lebih sederhana dibanding turbin angin tipe horizontal axis (HAWT) dan kemampuan yang baik untuk memanfaatkan angin dari segala arah. Penelitian ini dilakukan untuk mendapatkan desain optimal profil blade Savonius VAWT tipe Bach pada parameter blade arc angle (θ) dan blade shape ratio (p/q). Metode yang dipakai adalah simulasi numerik Computational Fluid Dynamics (CFD) dua dimensi menggunakan software ANSYS Fluent dengan model turbulensi realizable k-ε. Simulasi dilakukan dengan kecepatan aliran (U) sebesar 4 m/s. Penelitian dilakukan dengan menganalisis performa aerodinamis dari dua puluh empat model Savonius VAWT dengan variasi dimensi blade arc angle (θ) 125°, 135°, 145°, 155°, 165° dan 180° dan variasi blade shape ratio (p/q) 0; 0,2; 0,4 dan 0,6 . Data coefficient of power (CoP) hasil simulasi kemudian akan diplot menjadi surrogate model dalam bentuk sumbu kartesian tiga dimensi menggunakan metode interpolasi cubic spline. Dari grafik yang terbentuk ditemukan titik optimal profil blade turbin. Desain hasil optimasi dibandingkan kembali dengan desain konvensional semi-circular Savonius VAWT untuk mengetahui peningkatan kinerja turbin hasil optimasi. Didapatkan desain optimal adalah model dengan blade arc angle (θ) = 139° dan blade shape ratio (p/q) = 0,6. Desain optimal menghasilkan nilai CoM 0,277 dan CoP 0,1943. Desain optimal memiliki performa aerodinamika (CoP) lebih tinggi 8,78% dibandingkan dengan desain konvensional.
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Savonius Vertical Axis Wind Turbine (VAWT) is a type of rotating equipment that can convert wind kinetic energy into electrical energy. The advantages of this type of wind turbine are a simpler design than horizontal axis wind turbines (HAWT) and a good ability to utilize wind from all directions. The aim of this research was to obtain the optimal design of the Bach type Savonius VAWT blade profile in the blade arc angle (θ) and blade shape ratio (p/q) parameters. The method used is a two-dimensional Computational Fluid Dynamics (CFD) numerical simulation using ANSYS Fluent software with realizable k-ε turbulence models. The simulation was carried out with a flow velocity (U) of 4 m/s. The study was conducted by analyzing the aerodynamic performance of twenty-four Savonius VAWT models with variations in blade arc angle (θ) dimensions of 125°, 135°, 145°, 155°, 165° and 180° and blade shape ratio (p/q) variations of 0; 0,2; 0.4 and 0.6. The simulated coefficient of power (CoP) data will then be plotted into a surrogate model in the form of a three-dimensional cartesian axis using the cubic spline interpolation method. From the formed graph found the optimal point of the turbine blade profile. The optimized design is compared back to the conventional semi-circular Savonius VAWT design to determine the improved performance of the optimized turbine. The optimal design is a model with blade arc angle (θ) = 139° and blade shape ratio (p/q) = 0.6. The optimal design yields a CoM value of 0.277 and a CoP of 0.1943. The optimal design has an aerodynamic performance (CoP) 8.78% higher than the conventional design.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	Savonius VAWT, Bach Type, Blade Arc Angle, Blade Shape Ratio, CFD, Optimasi, Interpolasi Cubic Spline.
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ820 Wind power
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Vava Muhammad Risdhian
Date Deposited:	24 Jul 2023 02:30
Last Modified:	24 Jul 2023 02:30
URI:	http://repository.its.ac.id/id/eprint/99022

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