Analisis Pengaruh Sudut Deflektor Terhadap Performansi Turbin Savonius Tipe Modified Bach

Alfiasnyah, Fernando (2022) Analisis Pengaruh Sudut Deflektor Terhadap Performansi Turbin Savonius Tipe Modified Bach. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Bauran energi di Indonesia masih didominasi oleh migas yang mana bertolak belakang dengan tujuan pengurangan emisi gas KLHK. Namun dari laporan ESDM persentase bauran energi terbarukan mengalami tren peningkatan di beberapa tahun terakhir ini. Salah satu jenis teknologi energi terbarukan yang dapat dikembangkan untuk mendukung tren tersebut adalah turbin arus laut. Dari berbagai macam jenis turbin arus laut salah satu jenisnya yang mampu bekerja di kecepatan arus rendah seperti Indonesia adalah turbin savonius modified bach yang merupakan pengembangan dari turbin savonius konvensional. Akibat dari mengusung konsep turbin savonius konvensional yang mengandalkan drag, performanya terbatasi oleh adanya returning blade yang melawan arah fluida. Maka dari itu perlu dilakukan penambahan deflector pada returning blade untuk meningkatkan performanya. Melalui simulasi 2 dimensi secara numerik (computational fluid dynamics) dengan ansys fluent, penambahan deflector disimulasikan. Deflector divariasikan sudutnya untuk mendapatkan koefisien performa paling baik. Variasi sudut yang dilakukan diantaranya sudut 44⁰; 90⁰; 95,5⁰; 95,8⁰; 101⁰; dan 106,5⁰. Rata-rata koefisien performa terbaik terjadi pada sudut deflector 101⁰ dengan peningkatan rata-rata 9,34%. Lain halnya dengan koefisien performa tertinggi yang dapat dicapai berada pada sudut deflector 90⁰ dengan koefisien performa sebesar 0,32. Variasi sudut dibawah 90⁰ memiliki tren pengurangan performa dibandingkan turbin savonius tipe modified bach tanpa deflector. Sedangkan variasi sudut 90⁰ keatas memiliki tren kenaikan performa.
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The energy mix in Indonesia is still dominated by oil and gas, which contradicts the KLHK's goal of reducing gas emissions. However, from the ESDM report, the percentage of the renewable energy mix has an increasing trend in recent years. One type of renewable energy technology that can be developed to support this trend is ocean current turbines. Of the various types of ocean current turbines, one type that can work at low current speeds like Indonesia is the modified bach savonius turbine which is a development of the conventional savonius turbine. As a result of carrying the conventional savonius turbine concept that relies on drag, its performance is limited by the presence of blades that oppose the direction of the flow. Therefore it is necessary to add a deflector on the rear blade to improve its performance. Through a 2-dimensional numerical simulation (computational fluid dynamics) with ansys fluent, the addition of a deflector is simulated. The deflector angle is varied to get the best performance coefficient. Angle variations that are carried out include the angle of 44⁰; 90⁰; 95.5⁰; 95.8⁰; 101⁰; and 106.5⁰. Angle variations below 90⁰ have a downward trend in performance compared to the turbine without deflectors. Meanwhile, variations in the angle of 90⁰ and above have an increasing trend in performance. The best average coefficient of power occurs at a deflector angle of 101⁰ with an average increase of 9.34%. In addition, the highest coefficient of power can be achieved at a 90⁰ deflector angle with a coefficient of power of 0.32.

Item Type:	Thesis (Other)
Additional Information:	RSKe 621.24 Alf a-1 2022 3100022094024
Uncontrolled Keywords:	CFD, turbin savonius tipe modified bach, deflector, coefficient of power, modified bach type savonius turbine
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ778 Gas turbines
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User:	Anis Wulandari
Date Deposited:	08 Oct 2025 12:10
Last Modified:	08 Oct 2025 12:10
URI:	http://repository.its.ac.id/id/eprint/128526

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