Pengaruh Panjang Passive Moveable Flap terhadap Performansi Turbin Hidrokinetik Tipe Darrieus

Sahertiyan, Doni (2024) Pengaruh Panjang Passive Moveable Flap terhadap Performansi Turbin Hidrokinetik Tipe Darrieus. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Turbin hidrokinetik merupakan pembangkit listrik tenaga air “zero-head”, di mana energi diekstraksi dari energi kinetik aliran air, mirip dengan turbin angin. Salah satu contoh
dari turbin hidrokinetik adalah turbin hidrokinetik sumbu vertikal tipe darrieus. Penelitian ini bertujuan untuk memodifikasi turbin dengan menambahkan passive movable flap dengan beberapa variasi panjang pada bilah turbin sumbu vertikal tipe darrieus. Sehingga dapat memanfaatkan gaya dorong dalam menambah torsi turbin dan meningkatkan daya yang dapat dibangkitkan oleh turbin. Digunakan Computational Fluid Dynamics untuk mengetahui fenomena yang terjadi pada aliran fluida. Variasi posisi flap pada 50% dan 75% cord, dengan masing-masing panjang flap 100%, 75%, dan 50% pada sudut bukaan maksimum flap 90˚. Kecepatan aliran yang digunakan pada penelitian ini adalah 0.29 m/s , 0.35 m/s , 0.375 m/s, dan 0.4 m/s. Dari hasil penelitian didapatkan variasi paling optimal dan memiliki Cp tertinggi adalah variasi panjang 100% dengan posisi flap berada pada 75% cord untuk TSR 2.882 yaitu 0.0572. Panjang passive moveable flap memberikan pengaruh terhadap luas bidang yang dapat ditabrak oleh aliran. Semakin panjang passive moveable flap maka semakin luas bidang yang bertabrakan dengan aliran dan menghasilkan gaya drag yang lebih besar. Hal tersebut memberikan dampak terhadap besarnya torsi dan koefisien daya yang dihasilkan oleh turbin.
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A hydrokinetic turbine is a "zero-head" hydroelectric power plant, in which energy is extracted from the kinetic energy of water flow, similar to a wind turbine. One example of a hydrokinetic turbine is a Darrieus type vertical axis hydrokinetic turbine. This study aims to modify the turbine by adding passive movable flaps with some length variations on the Darrieus type vertical axis hydrokinetic turbine. Thus it can utilize the drag force in increasing turbine torque and increasing the power that can be generated by the turbine. Computational Fluid Dynamics is used to determine phenomena that occur in fluid flow. Variations in flap position on the cord are 50% and 75%, with flap lengths of 100%, 75% and 50% respectively at a maximum flap opening angle of 90˚. The flow velocities used in this study were 0.29 m/s, 0.35 m/s, 0.375 m/s, and 0.4 m/s. From the research results, it was obtained that the most optimal variation and the highest Cp was a 100% length variation with a flap position at 75% of the cord for a TSR of 2.882, with value 0.0572. The length of the passive movable flap influences the area that can be exposed to flow. The longer the passive movable flap, the wider the area that collides with the flow and produces a greater drag force. This has an impact on the amount of torque and power coefficient produced by the turbine.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Turbin Hidrokinetik Sumbu Vertikal Tipe Darrieus, Passive Moveable Flap, Koefisien Daya, TSR, Torsi
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA357 Computational fluid dynamics. Fluid Mechanics T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Physics Engineering > 30201-(S1) Undergraduate Thesis
Depositing User:	Doni Sahertiyan
Date Deposited:	09 Feb 2024 02:57
Last Modified:	09 Feb 2024 02:57
URI:	http://repository.its.ac.id/id/eprint/106498

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