Studi Numerik Pengaruh Blockage Ratio terhadap Kinerja Dua Turbin Air Savonius Tersusun Tandem untuk Putaran Turbin Searah

Ramadhani, Savitri (2024) Studi Numerik Pengaruh Blockage Ratio terhadap Kinerja Dua Turbin Air Savonius Tersusun Tandem untuk Putaran Turbin Searah. Masters thesis, Institut Teknologi Sepuluh Nopember.

Text 6007221009-Master_Thesis.pdf - Accepted Version Restricted to Repository staff only until 1 April 2026. Download (7MB) | Request a copy

Abstract

Peningkatan konsumsi energi setiap tahun menyebabkan meningkatnya kebutuhan renewable energy. Sumber energi utama yang digunakan di Indonesia adalah bahan bakar fosil yang menyebabkan krisis energi. Turbin air savonius dapat mengkonversi energi kinetik air menjadi energi listrik dengan kapasitas daya rendah. Keuntungan turbin ini yaitu desain yang sederhana dan memiliki kemampuan self-starting namun memiliki kekurangan daya yang dihasilkan rendah. Berdasarkan kekurangan ini banyak penelitian dilakukan untuk meningkatkan performanya. Meningkatkan performa turbin air savonius berdasarkan besarnya pengaruh blockage ratio dengan menghitung coefficient of moment (Cm), coefficient of power (CoP), coefficient of static torque (CTS), dan coefficient of pressure (Cp) pada dua turbin air savonius tersusun tandem dan berputar searah kemudian melakukan analisis pola aliran yang dihasilkan. Penelitian dilakukan dengan metode numerik menggunakan software ANSYS FLUENT 2023 R1 dengan tahapan pre-processing, processing, dan post processing. Model pada penelitian ini yaitu geometri dua dimensi. Penambahan turbin kedua di belakang turbin pertama pada dua jarak yang divariasi yaitu, T/D = 2,667 dan 50. Variasi jarak dinding kanal divariasikan yaitu, H = 58, 90, 121, 183, 250, 550, dan 1100. Kecepatan aliran air tetap yaitu 0,3 m/s. Hasil yang didapat dari penelitian ini adalah jarak T/D kecil (T/D = 2,667) pada variasi jarak kanal H = 58, 90, 121, 183, 250 mm efektif untuk meningkatkan performa turbin depan, sedangkan untuk turbin belakang efektif meningkatkan performanya pada jarak kanal H = 90 mm. Jarak T/D besar (T/D = 50) semua variasi jarak kanal H efektif untuk meningkatkan performa turbin depan dan turbin belakang karena nilai coefficient of power yang dihasilkan lebih besar. Kenaikan CoP pada T/D 50 untuk turbin depan sebesar 69% pada H = 183,50% pada H = 250, dan 12% pada H = 550. Turbin belakang didapatkan kenaikan CoP sebesar 57% pada H = 183, 50% pada H = 250, dan 12% pada H = 550.
=================================================================================================================================
The increase of energy consumptions per year causing the increase in need of renewable energy. The main source of energy in Indonesia is fossil fuels that can caused energy crisis. Savonius hydrokimetic turbine convert the kinetic energy into electricity with low capacity. The advantages of this turbine are simple design and ability to self starting, although it has a low performance. The increase of Savonius hydrokinetic turbines performance according to blockage ratio with calculating the coefficient of moment (Cm), coefficient of power (CoP), coefficient of static torque (CTS), and coefficient of pressure (Cp) of twin hydrokinetic Savonius turbines with unidirectional rotational in tandem arrangement and analysis the flow pattern. This research performed with numerical method using ANSYS FLUENT 2023 R1 software with pre-processing, processing, dan post processing. The model of this research is two dimentional. Adding the second turbine behind the first turbine with the variation of two turbine’s distance T/D = 2,667 and 50. Distance variation of canal walls are H = 58, 90, 121, 183, 250, 550, and 1100. Velocity of water flow remains constant of 0,3 m/s. The results of this research is on the small T/D distance (T/D = 2,667) in canal’s walls distance variation H = 58, 90, 121, 183, 250 mm are effective to improve the performance of upstream turbine, whereas for the downstream turbine effective to improve the performance in canal’s walls distance of H = 90 mm. The higher T/D distance (T/D = 50) in all canal’s walls distance variations are effective to improve the performance of both turbines according to the coefficient of power. The increase of CoP in T/D 50 upstream turbine is 69% in H = 183, 50% in H = 250, and 12% in H = 550, respectively. Downstream turbine increment of CoP is 57% in H = 183, 50% in H = 250, and 12% in H = 550, respectively.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	turbin air Savonius, tandem, numerik, coefficient of power, coefficient of moment, Savonius hydrokinetic turbine, tandem, blockage ratio, numeric
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ266 Turbines. Turbomachines (General) T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21101-(S2) Master Thesis
Depositing User:	Savitri Ramadhani
Date Deposited:	09 Feb 2024 18:45
Last Modified:	09 Feb 2024 18:45
URI:	http://repository.its.ac.id/id/eprint/106603

Actions (login required)

View Item