Munib, Ahmadi (2019) Analisis Numerik Respon Gerak Pada Lambung Cylindrical Platform PLTAL Laut Dalam. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Titik strategis potensi energi arus laut (tidal) di Indonesia dapat menjadi solusi menghadapi krisis energi, dan sebagai pengembangan energi terbarukan. Arus yang dapat dimanfaatkan untuk memutar turbin memiliki kriteria rata-rata kecepatan sebesar 1-2 m/detik Pada tugas akhir berikut penulis menawarkan dua konsep desain PLTAL yang dapat dikembangkan berdasarkan probibilitas tertentu. Metode yang digunakan yakni permodelan platform dan melakukan uji struktur platform dipengaruhi oleh factor lingkungan. Skenario yang dilakukan yakni analisa ROA (Resistance Amplitude Operator), COG (Centre Of Gravity) dan line tension pada mooring system. Selanjutnya membandingkan tegangan tali/rantai tambat pada model Cylindrical Hull menggunakan turret-mooring system pada kecepatan 1 m/s dan 2 m/s . Dari hasil uji menunjukkan motion response platform pada gerak translasi terbesar pada gerak surge sejauh 4 m dan ggerak rotasi sebesar 4,5 derajat. Untuk analisa mooring system rata-rata tegangan maksimal pada rantai tambat mencapai 2000 kN. Selisih tegangan antar rantai tidak jauh berbeda, dengan proof load maksimum pada nilai 2245,82 kN dengan faktor keamanan di angka 1,73 dan masih masuk kriteria dengan API RP 2SK Standard. Simulasi ini akan menggunakan software Solidwork, Maxsurf Marine, MOSES Marine dan Orcaflex. Penentuan kondisi lingkungan berdasarkan data di lapangan.
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The strategic point of potential tidal energy in Indonesia can be a solution to the energy crisis, and as the development of renewable energy. The current that can be used to rotate the turbine has an average speed criterion of 1-2 m / sec. In the following final assignment the author offers two PLTAL design concepts that can be developed based on certain probabilities. The method used is platform modeling and testing the platform structure is influenced by environmental factors. The scenarios performed are analysis of ROA (Resistance Amplitude Operator), COG (Center Of Gravity) and line tension on the mooring system. Furthermore, comparing the rope / mooring chain stress on the Cylindrical Hull model using a turret-mooring system at a speed of 1 m / s and 2 m / s. From the test results show the motion response platform on the largest translational motion on surge motion as far as 4 m and rotational motion of 4.5 degrees. For the analysis of the mooring system the average maximum stress on the mooring chain reaches 2000 kN. The voltage difference between the chains is not much different, with the maximum proof load at the value of 2245.82 kN with the safety factor in 1,73 and it still valuable with API RP 2SK Standard. This simulation will use Solidwork, Maxsurf Marine, MOSES Marine and Orcaflex software. Determination of environmental conditions based on data in the field.
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