Pemodelan Wave Energy Converter Mode Gerak Pitch dengan Variasi Penangkap Gelombang Bentuk Silinder Berpenampang Elips

Farkhani, Imam Faiz (2017) Pemodelan Wave Energy Converter Mode Gerak Pitch dengan Variasi Penangkap Gelombang Bentuk Silinder Berpenampang Elips. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Gelombang merupakan salah satu sumber energi baru dan terbarukan yang telah banyak diteliti melalui pengembangan konsep Wave Energy Converter (WEC). Dalam tugas akhir ini, akan dilakukan perancangan dan analisis awal struktur Wave Energy Converter dengan memanfaatkan konfigurasi dan prinsip kerja struktur lepas pantai berjenis Articulated Tower yang memiliki sifat tidak stabil akibat hempasan gelombang untuk memanfaatkannya sebagai mekanisme penggerak pompa piston yang mengalirkan fluida untuk menggerakkan turbin penghasil listrik. Tujuan dari tugas akhir ini adalah untuk mengetahui karakteristik gerak dari struktur Wave Energy Converter yang divariasikan berdasarkan ukuran buoyancy chamber pada 3 kedalaman yang berbeda. Dari beberapa variasi ukuran struktur tersebut, akan ditemukan satu struktur yang memiliki amplitudo pitch terbesar pada masing-masing kedalaman berdasarkan perhitungan dengan metode analitik dan numerik. Hasil penelitian ditemukan bahwa amplitudo pitch struktur meningkat seiring bertambahnya volume buoyancy chamber. Struktur WEC dengan variasi ke-3 dengan kedalaman 10 m pada frekuensi gelombang 1 rad/s menghasilkan amplitudo pitch terbesar dengan nominal amplitudo pitch sebesar 9,10 derajat. Kecepatan aliran air maksimum yang dapat dipompa oleh pompa piston adalah 136,14 m/s. ================================================================== Wave is one of the example of renewable energy source that has been studied and harnessed by many researchers through the construction of many kinds of Wave Energy Converter. In this study, the researcher will conduct the preliminary study of wave energy converter design using the principle of the Articulated Tower structure. Pitch motion characteristic of Articulated Tower is the main topic that will be functioned as the driving force of the piston pump, the device which is often used as the fluid thruster. The fluid pumped by the piston pump will be beneficial as a mechanical energy source of electric rotors. The goal of this study is to discover the motion characteristic of the Wave Energy Converter (WEC) which will be modified based on the size of buoyancy chamber at 3 different water depths. From those structure variations, there will be one structure having the largest pitch amplitude at each depth based on analytical and numerical RAO calculation. The result of the study shows that the increase of the buoyancy chamber will also result in the increase of maximum pitch amplitude. At frequency of 1 rad/s, structure with variation no.1 in the depth of 10 m having the largest pitch amplitude (9.10 degree). The maximum water flow velocity which can be pumped by piston is 136.14 m/s.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Articulated Tower, WEC, RAO, Silinder Berpenampang Elips, Buoyancy Chamber, Pompa Piston, Piston Pump
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis
Depositing User: Farkhani Imam Faiz
Date Deposited: 09 Oct 2017 06:13
Last Modified: 08 Mar 2019 02:37
URI: http://repository.its.ac.id/id/eprint/46332

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