Rahmawati, Nuraini Dian (2023) Experimental Study The Effect Of Ellipse Installation Beside Advancing Blade On The Performance Of Savonius Turbine “Case study for distance Y/D = 1.82; with ellipse size b/a = 2 and 1 with wind speed variation 4;5;6; and 7 m/s”. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Energy demand in Indonesia will continue to increase with the increase in population. In fulfilling energy needs, it is necessary to use renewable energy to replace fossil energy which will run out. Renewable energy sources that have abundant potential in Indonesia, one of which is wind energy. One of the turbines that can be used is the Savonius wind turbine. The construction is simple, the efficiency of this wind turbine is quite low, so research is needed to improve the performance of the Savonius wind turbine. Therefore, this study aims to improve the performance of the Savonius wind turbine. Therefore, a study was carried out to improve the performance of the Savonius wind turbine by installing the ellipse and circular cylinder beside the advancing turbine blades.
This study is conducted in a laboratory experiment with two configurations. In the first configuration, the cylinder ellips are placed beside the advancing blade with b/a = 2. In the second configuration, the cylinder ellips are placed beside the advancing blade with b/a = 1 with the distance cylinder to the blade diameter is Y/D = 1.82. This research uses Savonius turbine with height (H) = 295 mm, shaft diameter (e) = 19 mm, and blade diameter (D) = 165.2 mm and cylinders ellips with length (h) = 490 mm and diameter (d) = 82 .6 and 41.3 mm or d/D = 0.5. The wind speed varies by 4, 5, 6, and 7 m/s. The airflow from the axial fan is maintained its uniformity with the honeycomb and the speed is adjusted by adjusting the voltage from the voltage regulator. Wind speed is measured with an anemometer, static torque with a torquemeter, turbine angular speed with a tachometer, and dynamic torque with a brake rope dynamometer.
The result obtained for installation of an ellipse with b/a = 2 beside the advancing blade at Y/D = 1.82 are less effectively increases performance at speeds of 4 - 7 m/s, especially at the wind speed of 5 m/s gives the highest increase in CoP have a value of 2.43% and value of CM is 2.11% the increases are not sicnificant. Installation of circular cylinder with b/a = 1 less effectively increases performance at speeds of 4 - 7 m/s, except at the wind speed of 7 m/s gives the highest increase in CoP have a value of 9.08% and the highest CM at wind speed 5 m/s with the value of 10.56%, the increases are significant. The static torqe coefficient effectively increases for b/a = 2 and 1, but not been able to make the Savonius wind turbine have self-starting at all angular position of blade.
Keywords: coefficient of moment, coefficient of power, coefficient of static torque, ellipse, Savonius turbine.
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Kebutuhan energi di Indonesia akan terus meningkat seiring dengan bertambahnya jumlah penduduk. Dalam memenuhi kebutuhan energi, perlu adanya pemanfaatan energi terbarukan untuk menggantikan energi fosil yang akan habis. Sumber energi terbarukan yang memiliki potensi melimpah di Indonesia, salah satunya adalah energi angin. Salah satu turbin yang dapat digunakan adalah turbin angin Savonius. Dengan konstruksi yang sederhana, efisiensi dari turbin angin ini cukup rendah. Oleh karena itu, dilakukan penelitian untuk meningkatkan performa turbin angin Savonius dengan cara memasang ellips dan silinder sirkular di samping sudu advancing.
Penelitian ini dilakukan dalam percobaan laboratorium dengan dua konfigurasi. Pada konfigurasi pertama, silinder elips diletakkan di samping advancing blade dengan b/a = 2. Pada konfigurasi kedua, silinder elips diletakkan di samping advancing blade dengan b/a = 1 dengan jarak silinder terhadap diameter blade adalah Y/D = 1,82. Penelitian ini menggunakan turbin Savonius dengan tinggi (H) = 295 mm, diameter poros (e) = 19 mm, dan diameter sudu (D) = 165,2 mm serta silinder elips dengan panjang (h) = 490 mm dan diameter (d) = 82,6 dan 41,3 mm atau d/D = 0,5. Kecepatan angin bervariasi sebesar 4, 5, 6, dan 7 m/s. Aliran udara dari kipas aksial dipertahankan keseragamannya dengan sarang lebah dan kecepatannya diatur dengan mengatur tegangan dari pengatur tegangan. Kecepatan angin diukur dengan anemometer, torsi statis dengan torquemeter, kecepatan sudut turbin dengan takometer, dan torsi dinamis dengan break dinamometer.
Hasil yang diperoleh untuk pemasangan ellips dengan b/a = 2 disamping advancing blade pada Y/D = 1,82 kurang efektif meningkatkan performansi pada kecepatan 4 - 7 m/s,performa terbaik pada kecepatan angin 5 m/s memberikan peningkatan CoP tertinggi yaitu 2,43 % dan nilai CM tertinggi yaitu 2,11 % peningkatannya tidak signifikan. Pemasangan silinder sirkular dengan b/a = 1 kurang efektif meningkatkan performa pada kecepatan 4 - 7 m/s, kecuali pada kecepatan angin 7 m/s memberikan peningkatan CoP tertinggi dengan nilai 9,08% dan CM tertinggi pada kecepatan angin 5 m/s dengan nilai 10,56%, peningkatannya cukup signifikan. Koefisien torsi statis meningkat secara efektif untuk b/a = 2 dan 1, namun belum mampu membuat turbin angin Savonius memiliki self-starting pada semua posisi sudut blade.
Kata kunci: koefisien momen, koefisien daya, koefisien torsi statis, elips, turbin Savonius.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | thesis about performance Savonius wind turbine |
| Uncontrolled Keywords: | Keywords: coefficient of moment, coefficient of power, coefficient of static torque, ellipse, Savonius turbine. Kata kunci: koefisien momen, koefisien daya, koefisien torsi statis, elips, turbin Savonius. |
| Subjects: | T Technology > TJ Mechanical engineering and machinery T Technology > TJ Mechanical engineering and machinery > TJ828 Wind turbines |
| Divisions: | Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | Nuraini Dian Rahmawati |
| Date Deposited: | 29 Jul 2023 00:46 |
| Last Modified: | 29 Jul 2023 00:46 |
| URI: | http://repository.its.ac.id/id/eprint/99689 |
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