Analisa pengaruh geometri kanal terhadap kinerja turbin vertikal aksis jenis darrieus straight bladed berbasis computational fluid dynamics

Prikafais, Elfayasa (2015) Analisa pengaruh geometri kanal terhadap kinerja turbin vertikal aksis jenis darrieus straight bladed berbasis computational fluid dynamics. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kinerja turbin vertikal aksis jenis Darrieus Straight Bladed mampu ditingkatkan dengan cara menambah kecepatan aliran yang mengenai turbin atau memperluas daerah sapuan turbin yang terkena aliran. Aliran pada kanal pada umumnya mempunyai kecepatan yang rendah sehingga daya yang dihasilkan rendah. Salah satu cara yang untuk mengatasi hal tersebut adalah penggunaan model diffuser pada kanal. Pada penelitian ini dilakukan simulasi untuk menganalisa pengaruh pengunaan diffuser kanal terhadap profil aliran dan kinerja turbin. Simulasi dilakukan pada empat jenis diffuser yaitu model I, II, III dan IV dengan variasi jarak peletakan turbin dengan pusat diffuser 60 cm, 70 cm dan 80 cm serta variasi kecepatan aliran 0.5 m/s, 0.8 m/s dan 1.1 m/s. Diffuser model I meningkatan kecepatan aliran tertinggi hingga 2.3 kali, model II hingga 2.1 kali, model III hingga 1.93 kali, model IV hingga 1.76 kali. Peningkatan torsi tertinggi didapatkan pada diffuser model IV dengan variasi peletakan jarak turbin dengan pusat diffuser 60 cm. Peningkatan torsi pada kecepatan aliran 0.5 m/s sebesar 33.37%, pada kecepatan aliran 0.8 m/s sebesar 50.56%, pada kecepatan aliran 1.1 sebesar 57.95%. Diffuser model IV pada variasi jarak peletakan turbin dengan pusat diffuser 60 cm meningkatkan torsi tertinggi karena peningkatan kecepatan aliran yang mengenai blade dan shaft lebih merata. ================================================================================================ Performance of Darrieus Straight Bladed vertical axis turbine can be improved by increasing the flow velocity and swept area of the turbine. Commonly, the flow in a channel has low velocity, so it’s produces low power. One of the method to solve the problem is using diffuser model in a channel. This research conducted a simulation to analysis of diffuser geometry effects on the flow profile and performance of the turbine. There are four types of diffuser, model I, II, III and IV with variations of the placement distance of diffuser center and turbine center, 60 cm, 70 cm and 80 cm and variations of flow velocity 0.5 m/s, 0.8 m/s and 1.1 m/s. Model I diffuser increases the flow velocity up to 2.3 times, model II increases up to 2.1 times, model III increases up to 1.93 times, model IV increases up to 1.76 times. The highest increased torque is obtained on model IV diffuser with the placement distance of diffuser center and turbine center 60 cm. Flow velocity 0.5 m/s increases torque up to 33.37%, flow velocity 0.8 m/s increases up to 50.56%, flow velocity 1.1 m/s increases up to 57.95%. Model IV diffuser on the placement distance of diffuser center and turbine center 60 cm increases highest torque caused by increased flow velocity through the blade and shaft is more evenly distributed.

Item Type: Thesis (Undergraduate)
Additional Information: RSF 520.106 4 Pri a
Uncontrolled Keywords: kanal, diffuser, Darrieus Staright Bladed, CFD
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics.
Divisions: Faculty of Industrial Technology > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User: Mr. Marsudiyana -
Date Deposited: 13 Nov 2019 02:03
Last Modified: 13 Nov 2019 02:03
URI: http://repository.its.ac.id/id/eprint/71727

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