Studi Eksperimen Pengaruh Variasi Sudut Penempatan Plat Datar Pengganggu Di Depan Returning Blade Terhadap Performa Turbin Angin Savonius “Studi Kasus Untuk Rasio Panjang Plat Pengganggu Relatif Terhadap Diameter Sudu Turbin (L/D) = 1,1547 “

Prakoso, Rizkiardi Wilis (2016) Studi Eksperimen Pengaruh Variasi Sudut Penempatan Plat Datar Pengganggu Di Depan Returning Blade Terhadap Performa Turbin Angin Savonius “Studi Kasus Untuk Rasio Panjang Plat Pengganggu Relatif Terhadap Diameter Sudu Turbin (L/D) = 1,1547 “. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.

[img]
Preview
Text
2112100090-Undergraduate_Thesis.pdf - Published Version

Download (2MB) | Preview

Abstract

Turbin angin Savonius merupakan salah satu jenis turbin yang banyak digunakan untuk memperoleh energi alternatif nonfosil pada era krisis energi saat ini, walaupun turbin ini memiliki performa yang rendah pada prinsipnya. Turbin Savonius bekerja dikarenakan oleh perbedaan gaya drag yang dihasilkan oleh sudunya, returning dan advancing blade. Tujuan dari penelitian ini adalah untuk meningkatkan performa turbin Savonius dengan menempatkan pengganggu berupa plat datar di depan returning blade. Dalam rangka meningkatkan performa turbin angin Savonius yang memiliki diameter D 60 mm dan tinggi h 80 mm, sebuah plat dengan lebar 69 mm dan tinggi 150 mm digunakan sebagai pengganggu yang ditempatkan di depan returning blade dari turbin. Percobaan dilakukan pada subsonic open circuit wind tunnel. Peralatan ini memiliki panjang 457 mm, dengan area uji 304 mm x 304 mm. Kecepatan aliran dari wind tunnel dapat disesuaikan menjadi 8,83 m/s; 11,03 m/s; 13,24 m/s sesuai dengan bilangan Reynolds Re = 6,0 x 104; 7,5 x 104; 9,0 x 104 (berdasarkan panjang setara dengan L = 2D-b, dimana b adalah lebar overlap dari dua sudu turbin, dan kecepatan aliran ). Kecepatan angin diukur menggunakan pitot-static tube yang dihubungkan dengan inclined manometer. Putaran turbin diukur menggunakan tachometer. Torsi statis diukur menggunakan torquemeter, dan daya output didapatkan dari pengukuran tegangan dan arus yang dihasilkan generator yang terhubung dengan poros turbin Savonius ============================================================================================== Savonius wind turbine is one of the type of wind turbines that has been widely used to obtain alternative non-fosil energy in the era of the current energy crisis, eventhought this turbine has a low performance in principle. The savonius turbine works caused by different of the drag force generated by its blade, returning and advancing blade. The aims of the research is to improve the performance of the savonius turbine by placing disturbance in the form of plate in front of returning blade. In order to increasing the performance of Savonius wind turbine having a diameter D of 60 mm and height h of 80 mm, a plate having a width of 69 mm and a height of 150 mm is used as a disturbance located in front of returning blade of turbine. This disturbance is located in various angle of 0°<α<90°. The experiments were carried out in a subsonic open circuit wind tunnel. This facility has a 457 mm long, with test section 304 mm x 304 mm. The free stream velocity of wind tunnel could be adjusted to 8,83 m/s, 11,03 m/s, 13,24 m/s, corresponding respectively to Reynolds number Re = 6 x 104; 7,5 x 104; 9 x 104 (based on equivalent length of L = 2D-b, where b is the width of overlap of the two turbine blades, and the free stream velocity). The velocity of wind is measured using a pitot-static tube connected to the inclined manometer. The rotation of turbine is measured by tachometer. The static torque is measured by torquemeter, and finally the power output of turbine is determined by measuring of voltage and electric current resulted by generator connecting to the shaft of Savonius turbine. The experimental result show that the placement of flat plate as disturbance and the various angle (0°≤α≤90°) in front of the returning blade Savonius wind turbine can improve the performance of wind turbine Savonius. It is based on the increase of rotation from turbine as 274% and coefficient of power (CoP) is 1668% on the Reynolds number 6 x 104 on various angle α = 40° relative to its value when the savonius turbine without any disturbance. The static torque (T) is increase up to 255% on the Reynolds number 9 x 104 on various angle α = 0°. Hasil eksperimen menunjukkan bahwa penempatan plat datar pengganggu dan variasi sudut (0° ≤ α ≤ 90°) di depan returning blade turbin angin Savonius dapat meningkatkan performa turbin angina Savonius. Hal ini berdasarkan dari kenaikan putaran dari turbin sebesar 274% dan coefficient of power (CoP) yaitu 1668% pada bilangan Reynolds 6 x 104 pada variasi sudut α = 40° dibandingkan terhadap data yang dihasilkan turbin Savonius tanpa pengganggu. Torsi status (T) mengalami kenaikan hingga 255% pada bilangan Reynolds 9 x 104 pada variasi sudut α = 0°

Item Type: Thesis (Undergraduate)
Additional Information: RSM 629.130 08 Pra s
Uncontrolled Keywords: performa turbin Savonius, plat datar, variasi sudut
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ828 Wind turbines
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: EKO BUDI RAHARJO
Date Deposited: 30 Jun 2020 00:32
Last Modified: 30 Jun 2020 00:32
URI: https://repository.its.ac.id/id/eprint/76247

Actions (login required)

View Item View Item