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.
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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. Tubes--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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