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All Journal Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Riset Sains dan Teknologi Kelautan
Daeng Paroka
Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin
Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Transportation

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Analisa Penempatan Dan Kebutuhan Proteksi Katodik Pada Sistem Pipa Gas Bawah Laut Offshore Dari Pulau Pemping Ke Tanjung Uncang Batam Nur Azisah; Daeng Paroka; Wahyuddin Wahyuddin
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 1, Nomor 3, Edisi November 2020
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v1i3.11978

Abstract

Corrosion is a problem that often occurs in submarine pipelines. This is because the metal pipe material is installed in environments that have a high level of corrosivity. Although corrosion cannot be avoided or eliminated, it can be controlled by cathodic protection. One of them is the sacrificial anode method. The aim of this research is to design a corrosion rate control in an underwater pipe along 13.5km, with a diameter of 16 inches for a design life of 45 years. The anode used is a 400 mm long and 40 mm thick anode made of aluminum alloy. In designing this cathodic protection, the writer refers to DNVGL-F103 and ISO 15589-2. From the results of this study, we will get the total anode needed to protect the pipe and the installation distance between the anodes. Based on the total anode, it can be seen the estimated cost needed in making cathodic protection.
Analisa Pengaruh Jumlah Muatan Terhadap Beban Sloshing Tangki Pada Kapal Tanker Dengan Metode Numerik Amar Ma'ruf; Daeng Paroka; Habibi Palippui
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 2, Nomor 1, Edisi Maret 2021
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20956/zl.v2i1.13340

Abstract

Tank is a cargo storage container and is the main part of ships carrying liquids and gases so that the cargo is maintained and safe. As a storage medium, the tank will always get loads that come from inside as well as loads that come from outside the tank, sloshing is one of the loads that come from inside. Sloshing occurs due to the movement of the vessel/tank resulting in free motion of oscillating fluid hitting the tank wall. The purpose of this study was to find the effect of the load on the movement and sloshing load on the tank with variations in the amount of load. The tank model used is a reference to a general purpose tanker transporting crude oil in two-dimensional rectangular conditions (midship) with a width of 8,6 m and a height of 8 m on both the left and right sides. The variations used are 10% load volume (0,8 m high), 30% volume (2,4 m high), 50% volume (4 m high), 70% variation (5,6 m high) and 90% variation (high 7,8 m). The simulation was carried out with a numerical method, namely Computational Fluid Dynamic (CFD) using Ansys Fluent software. The back of the tank is based on the movement of the ship which in this case is limited to heaving and rolling motion, from the simulation results it is concluded that the biggest sloshing effect occurs at the load volume variation of 10%, the frequency is 2.145, while the greatest pressure occurs at the lower left corner of the tank with a pressure of 443,29 Kpa.
ANALISA KELELAHAN STRUKTUR FPSO HUSKY OIL 370000 BOPD Ratnawati Siburian; Muhammad Zubair Muis Alie; Daeng Paroka
SENSISTEK:Riset Sains dan Teknologi Kelautan Volume 1, Nomor 1, Tahun 2018
Publisher : Departemen Teknik Kelautan Fakultas Teknik Universitas Hasanuddin

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Abstract

FPSO (Floating Production Storage and Offloading) adalah sebuah fasilitas di atas bangunan terapung yangdioperasikan di suatu ladang minyak dan gas bumi lepas pantai yang berfungsi untuk menerima, memproses,menyimpan dan menyalurkan hidrokarbon yang secara permanen ditambatkan di tempatnya beroperasi dan dapatdipindahkan dari satu tempat ke tempat lain. Adanya pengaruh beban lingkungan (gelombang) yang bersifat acakdapat mempengaruhi perilaku struktur FPSO pada kekuatan dan umur struktur. Analisa fatigue merupakan suatu carayang dapat dilakukan untuk memperkirakan resiko terjadinya kerusakan yang diakibatkan oleh beban berulang.Penelitian ini bertujuan untuk mengetahui umur struktur FPSO units Husky Oil yang beroperasi di Laut China Selatan.Metode yang digunakan untuk menghitung kelelahan struktur yaitu metode spectral fatigue analysis akibat bebansiklik yang terjadi selama operasi. Adapun spektrum gelombang yang digunakan adalah spektrum gelombangJONSWAP dengan menggunakan 2,5 sebagai nilai dari ɣ. Dari hasil perhitungan spektrum JONSWAP kemudiandilanjutkan dengan perhitungan RAO dan perhitungan stress respon spectra. Berdasarkan perhitungan stress responspectra dapat diketahui nilai zero moment dan second moment dengan menggunakan faktor simson, sehingga siklustegangan dapat diketahui. Sedangkan untuk siklus kegagalan menggunakan metode palmgren-miner berdasarkankurva S-N. Dari hasil analisa didapatkan umur kelelahan (fatigue life) untuk FPSO selama 64,274 Tahun
Co-Authors Amar Ma'ruf Habibi Palippui Muhammad Zubair Muis Alie Nur Azisah Ratnawati Siburian Wahyuddin Mustafa