Analisis Numerik Pengaruh Konfigurasi Jenis Sumbu Rotor dan Jarak Rendaman Terhadap Performa Turbin Hidrokinetik Darrieus Tipe Crossflow

Irdana, Damian Triyoga (2022) Analisis Numerik Pengaruh Konfigurasi Jenis Sumbu Rotor dan Jarak Rendaman Terhadap Performa Turbin Hidrokinetik Darrieus Tipe Crossflow. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dalam memenuhi kebutuhan akan energinya, Indonesia masih bergantung pada energi fosil walaupun saat ini mengalami penurunan produksi minyak dan gas bumi. Salah satu sumber energi baru terbarukan Indonesia yang sangat berpotensial adalah energi arus laut. Teknologi yang sering digunakan dalam memanfaatkan energi arus laut yaitu dengan menggunakan turbin. Turbin vertikal tipe Darrieus telah banyak dikembangkan untuk arus laut berkecepatan rendah namun berbeda halnya dengan turbin crossflow yang belum banyak dikembangkan. Jarak rendaman turbin juga memengaruhi performa turbin karena adanya faktor turbulensi di dekat muka perairan (free surface) dan dekat dasar perairan. Maka dari itu diperlukan perbandingan performa antara turbin vertikal dan turbin crossflow serta pengaruh variasi jarak rendaman ketika turbin dalam keadaan crossflow. Analisis dilakukan dengan pendekatan numerik (CFD) menggunakan Ansys Fluent. Dengan simulasi numerik dua (2) dimensi turbin vertikal dan crossflow dengan boundary condition yang disesusaikan sehingga berbeda di masing-masing konfigurasi, hasil penelitian menunjukkan terdapat peningkatan rata-rata performa pada turbin Darrieus tipe crossflow sebesar 9,88% terhadap tipe vertikal. Kecenderungan kinerja turbin lebih baik seiring semakin dalamnya turbin diletakkan dekat dasar perairan. Turbin crossflow bekerja paling optimal saat diletakkan pada dasar perairan dengan kecepat inlet 0,56 m/s sehingga dapat menghasilkan koefisien performa (Cp) 0,479.
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In meeting its energy needs, Indonesia still relies on fossil energy although currently experiencing a decline in oil and gas production. One of Indonesia's renewable energy sources with great potential is ocean current energy. The technology that is often used in harnessing the energy of ocean currents is by using a turbine. The Darrieus type vertical turbine has been widely developed for low-speed ocean currents, but it is different from the crossflow turbine which has not been widely developed. Turbine immersion depth also affects turbine performance due to turbulence factors near the free surface and near the bottom of the water. Therefore, it is necessary to compare the performance between the vertical turbine and the crossflow turbine and the effect of variations in the immersion distance when the turbine is in a crossflow state. The analysis was carried out using a numerical approach (CFD) using Ansys Fluent. By numerical simulation of two (2) dimensions of vertical and crossflow turbines with boundary conditions which are adjusted so that they are different in each configuration, the results showed that there was an increase in the average performance of the Darrieus turbine crossflow type by 9.88% compared to the vertical type. The tendency of turbine performance is better as the turbine is placed closer to the bottom of the water. The crossflow turbine works most optimally when placed on the bottom of the water with an inlet speed of 0.56 m/s so that it can produce a Cp of 0.479.

Item Type: Thesis (Other)
Uncontrolled Keywords: Crossflow, Darrieus, CFD, Immersion Depth, Turbine Performance, Jarak Rendaman, Performa Turbin
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ808 Renewable energy sources. Energy harvesting.
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Damian Triyoga Irdana
Date Deposited: 02 Feb 2022 06:59
Last Modified: 31 Oct 2022 04:15
URI: http://repository.its.ac.id/id/eprint/92651

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