Analisis Numerik Performa Hidrodinamika Two-Body Point Absorber Pada Gelombang Reguler

Fakhri, Muhammad Haidar (2023) Analisis Numerik Performa Hidrodinamika Two-Body Point Absorber Pada Gelombang Reguler. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Potensi energi gelombang laut di Indonesia cukup besar di angka rata-rata 15 kW/m. Bahkan yang paling tinggi mencapai 30kW/m berada di Selatan Pulau Jawa dan Barat Daya Pulau Sumatera. Wave Energy Converter (WEC) tipe two-body point absorber (TBPA) sudah banyak yang melakukan pengujian eksperimen maupun numerik bahkan telah dipasang two-body point absorber di beberapa perairan Eropa dan Amerika. Optimasi performa TBPA banyak dilakukan mulai dari modifikasi bentuk submerged body maupun optimasi di sisi Power Take Off (PTO). Pengaruh viscous terhadap daya yang diserap cukup besar sehingga perlu dipertimbangkan. Penelitian ini bertujuan untuk melihat pengaruh perubahan geometri terhadap hydrodynamic coefficient dan perfoma TBPA. Boundary Element Method (BEM) dan Finite Volume Method (FVM) akan digunakan untuk mendapatkan nilai tersebut. Hal tersebut diharapkan ada perubahan dan peningkatan performa terhadap TBPA. Dari hasil penelitian ini didapatkan hasil bahwa bentuk damper plate modifikasi 1, modifikasi 3, default dan modifikasi 2 memilik nilai kecil secara berurutan. Damping berefek pada perhitungan daya yang diserap TBPA. Daya yang diserap oleh TBPA paling besar di modifikasi 1, modifikasi 3, default dan modifikasi 2. Dari hasil penelitian ini didapatkan bahwa perubahan bentuk damper plate akan menurunkan nilai CD dan beberapa koefisien hidrodinamik seperti added mass, wave excitation force dan damping coefficient. Hal tersebut akan berimplikasi pada daya yang diserap oleh TBPA lebih optimal
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The potential for ocean wave energy in Indonesia is quite large at an average of 15 kW/m. In fact, the highest reaches 30kW/m are in the South of Java Island and the Southwest of Sumatra Island. Many Wave Energy Converter (WEC) of the two-body point absorber (TBPA) type have carried out experimental and numerical tests and have even installed two-body point absorbers in several European and American waters. TBPA performance has been optimized, starting from modifying the shape of the submerged body and optimizing the Power Take Off (PTO). The effect of viscous on the power absorbed is quite large so it needs to be considered. This study aims to see the effect of geometric changes on the hydrodynamic coefficient and TBPA performance. Boundary Element Method (BEM) and Finite Volume Method (FVM) will be used to get that value. It is hoped that there will be changes and performance improvements to TBPA. From the results of this study it was found that the shape of the damper plate modification 1, modification 3, default and modification 2 has a small value respectively. Damping has an effect on the calculation of the power absorbed by TBPA. The power absorbed by TBPA is greatest in modification 1, modification 3, default and modification 2. From the results of this study it was found that changing the shape of the damper plate will reduce the value of CD and several hydrodynamic coefficients such as added mass, wave excitation force and damping coefficient. This will have implications for the power absorbed by the TBPA more optimal.

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	WEC, TBPA, Performa
Subjects:	T Technology > TJ Mechanical engineering and machinery
Divisions:	Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38101-(S2) Master Thesis
Depositing User:	Muhammad Haidar Fakhri
Date Deposited:	08 Dec 2023 05:50
Last Modified:	08 Dec 2023 05:50
URI:	http://repository.its.ac.id/id/eprint/101590

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