Irmiyana, Triyanti (2016) Analisis Gerakan Konfigurasi Buoy Untuk Penyerapan Energi Gelombang Laut. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kebutuhan energi di Indonesia semakin meningkat dari tahun ke tahun, namun cadangan sumber energi yang berupa energi fosil semakin berkurang. Sehingga Indonesia membutuhkan energi terbarukan seperti energi gelombang laut yang mampu menggerakkan turbin dengan mengetahui data gelombang laut. Saat ini akan dirancang teknologi pembangkit listrik energi gelombang laut sistem piston yang terdiri dari buoy, pompa piston, pressure vessel, turbin, dan generator. Cara kerjanya adalah saat gelombang mengenai buoy, maka buoy yang dikopel dengan pompa piston akan bergerak pitch, pompa piston berfungsi menghasilkan dan memompa udara bertekanan ke pressure vessel. Dari pressure vessel, udara bertekanan disemprotkan ke sudu-sudu turbin sehingga menggerakkan poros turbin yang dikopel dengan generator. Karena teknologi pembangkit sistem piston masih dalam perencanaan, maka dalam penelitian ini dilakukan analisis gerakan konfigurasi dan dimensi buoy yang akan digunakan untuk penyerapan energi gelombang laut. Pemodelan dilakukan dengan metode numerik menggunakan CFD. Dalam penelitian ini panjang buoy dikondisikan sama dengan panjang gelombang laut serta hanya gerakan pitch pada buoy yang dianalisa. Selain menganalisa gerakan buoy juga menganalisa pola aliran yang terjadi di sekitar buoy baik dalam kondisi diam maupun bergerak pitch, dengan beberapa variasi yaitu 2 variasi panjang buoy, dan 5 variasi periode gelombang. Dari hasil penelitian dapat disimpulkan bahwa buoy dengan panjang 1 meter pada heading 0, periode 1,5 detik memiliki RAO paling besar yaitu 316,6 meter. Buoy dengan panjang 2 meter pada heading 180, periode 2 detik memiliki RAO paling besar yaitu 166,58 meter. Pola aliran di sekitar buoy saat diam merupakan aliran vortex laminer karena nilai Re berada di 40
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In Indonesia energy demand increase year by year but energy reserved that include fossil energy is lessen more. Therefore Indonesia needs a newest energy such as wave energy that can start a turbine by wave date informer. Nowadays scientist as designed an electric generator waves energy piston system which is consist of buoy, piston pump, pressure vessel, turbine and generator. When the waves catch a buoy which is paired with piston pump will get move pitch. The function of piston pump results an air and it will pump an air pressure to pressure vessel. From pressure vessel, air is sprayed to turbine so it will activate shaft turbine which is paired by generator. Technology of piston system generator is still on progress. Therefore in this research is to analyze configuration movement and buoy dimension which is used to adsorb wave energy. Modelling is done by numeric method by CFD. In this research, the length of buoy was set same as the length of wave energy and movement of pitch that is only analyzed. Furthermore, it will analyze flow system which is in buoy either at state or moving with some variation of that length variations buoy 2, and 5 variations of wave period. From this research, it can be resumed that buoy with a length of 1 meter in heading 0 a period of 1.5 seconds has the greatest RAO is 316.6 meters. Buoy with a length of 1 meter in heading 180 a period of 2 seconds has the greatest RAO is 166.58 meters. Flow system in around of stationery buoy is laminar vortex flow. It is because of Re value which is in 40
| Item Type: | Thesis (Masters) |
|---|---|
| Additional Information: | RTKe 627.924 Irm a-1 3100017068862 |
| Uncontrolled Keywords: | Buoy, Pressure vessel, Pitch, RAO |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering > TC147 Ocean wave power. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36101-(S2) Master Thesis |
| Depositing User: | Yeni Anita Gonti |
| Date Deposited: | 08 Sep 2020 05:54 |
| Last Modified: | 08 Sep 2020 05:54 |
| URI: | http://repository.its.ac.id/id/eprint/81828 |
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