Muharam, Nurfadhiel (2025) Analisa Variasi Sudut Bilah Inlet (β1) Dan Perubahan Casing Terhadap Performa Turbin Air Tipe Crossflow Menggunakan Metode Numerik, Computational Fluid Dynamic (CFD). Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Turbin Crossflow dinilai tepat digunakan pada PLTMH dikarenakan desain yang sederhana. Penelitian terdahulu menyatakan nilai efisiensi dan daya output turbin dapat dipengaruhi nilai dari sudut bilah inlet (β1) dari turbin Crossflow. Penelitian ini dilakukan dengan metode numerik dan menggunakan variasi pada sudut bilah inlet β1 dengan sudut 30º dan 50º dan melakukan modifikasi casing untuk menentukan hasil yang optimal dan meningkatkan kerja turbin. Hasil yang diharapkan adalah data kuantitatif dan kualitatif dari data existing dan data variasi nilai dari β1 sudut inlet dari turbin Crossflow, dimana data kuantitatif adalah daya turbin, daya air, torsi, efisiensi, Coefficient of Power, dan Tip Speed Ratio Sedangkan untuk data kualitatif berupa kontur tekanan total dan tekanan statis, dan vektor
kecepatan sepanjang aliran yang dilalui fluida. Hal ini dapat dilakukan dengan metode numerik CFD (Computational Fluid Dynamic). Hasil analisis menunjukkan penambahan plat pada casing turbin crossflow memberikan peningkatan terhadap efisiensi. Plat berperan mengurangi turbulensi dan separasi aliran, serta meningkatkan kestabilan putaran turbin. Analisis variasi sudut bilah menunjukkan pengaruh perubahan sudut bilah dapat meningkatkan efisiensi turbin hingga titik tertentu. Namun, terdapat batasan terhadap nilai sudut bilah, karena merubah derajat sudut bilah dapat menimbulkan perubahan aliran dan meningkatkan hambatan fluida. Hasil perbandingan antara sudut bilah 30º, 45º, dan 50º menunjukkan bahwa sudut bilah 30º menghasilkan performa terbaik, dengan torsi 96,41 Nm, daya turbin 908,18 Watt, dan efisiensi mencapai 36,48% pada putaran 90 rpm.================================================================================================================================================================================================================================================================================================================================================================================Crossflow turbines are considered suitable for use in micro-hydro power plants due to their simple design. Previous studies have indicated that the efficiency and power output of the turbine can be influenced by the value of the inlet blade angle (β1) of the crossflow turbine. This study was conducted using numerical methods and involved varying the inlet blade angle β1 at 30º and 50º, along with modifying the casing to determine optimal results and improve turbine performance. The expected results are quantitative and qualitative data from existing data and variations in the β1 inlet angle of the Crossflow turbine, where quantitative data includes turbine power, water power, torque, efficiency, Coefficient of Power, and Tip Speed Ratio. Qualitative data includes total pressure and static pressure contours, and velocity vectors along the fluid flow path. This can be done using the CFD (Computational Fluid Dynamics) numerical method. The analysis results show that adding plates to the Crossflow turbine casing improves efficiency. The plates reduce turbulence and flow separation, and enhance turbine rotational stability. Analysis of blade angle variations shows that changes in blade angle can improve turbine efficiency up to a certain point. However, there are limitations to the blade angle value, as changing the blade angle can cause changes in flow and increase fluid resistance. The comparison between blade angles of 30º, 45º, and 50º shows that the 30º blade angle produces the best performance, with a torque of 96.41 Watts, a turbine power of 908.18, and an efficiency of 36.48% at a rotation speed of 90 rpm, as well as a turbine power of 908.18 watts.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Bilah, Crossflow, PLTMH, Sudut, Turbin air, Angle, Blade, Crossflow, Microhydropower, Water turbine |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General) |
| Divisions: | Faculty of Vocational > Mechanical Industrial Engineering (D4) |
| Depositing User: | Nurfadhiel Muharam |
| Date Deposited: | 04 Aug 2025 04:13 |
| Last Modified: | 04 Aug 2025 04:13 |
| URI: | http://repository.its.ac.id/id/eprint/126532 |
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