Maurina, Mega Ristri (2024) Analisis Kelelahan Pada Repurposed Decommissioned Jacket Platform Sebagai Struktur Penopang Offshore Wind Turbine Menggunakan Pendekatan Pemodelan Sequentially Coupled. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Anjungan lepas pantai minyak dan gas memiliki masa pakai antara 20-25 tahun. Saat anjungan telah melewati batas service life-nya maka harus dilakukan decommissioning. Saat ini terdapat 15.89% anjungan lepas pantai di Indonesia berjenis fixed structure tipe jacket yang telah melewati batas service life-nya atau dapat disebut sebagai aging platform. Untuk menekan biaya decommissioning maka penggunaan kembali dari anjungan lepas pantai menjadi opsi yang sering dipilih. Sebuah transisi energi, dari ekstraksi bahan bakar fosil beremisi karbon ke sumber energi terbarukan sangat disarankan, untuk turut mendukung net zero emission. Potensi untuk penggunaan ulang berkelanjutan dari platform jacket lepas pantai sebagai support structure untuk offshore wind turbine dianggap sebagai gagasan yang tepat untuk turut mendukung transisi energi di Indonesia. Dalam pengambilan keputusan penggunaan ulang aging platform, diperlukan reassessment terhadap keamanan struktur dengan mempertimbangkan sisa umur kelelahan platform yang dimodifikasi untuk mengetahui integritas dari struktur tersebut. Pada penelitian ini akan menganalisa umur kelelahan struktur Platform XYZ berlokasi di Laut Jawa yang akan dioperasikan sebagai Offshore Wind Turbine berkapasitas 5MW. Struktur akan dianalisa secara global menggunakan metode cummulatie damage dan joint kritis pada struktur akan dianalisa secara lokal. Hasil dari analisa cummulative damage adalah sebesar 131 tahun dan 98 tahun menggunakan metode fracture mechanics
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Offshore oil and gas platforms have a lifespan of 20-25 years. Once a platform exceeds its service life, decommissioning is required. Currently, 15.89% of offshore platforms in Indonesia are fixed jacket structures that have exceeded their service life, or can be classified as aging platforms. To reduce decommissioning costs, the reuse of offshore platforms has become a common option. An energy transition from carbon-emitting fossil fuel extraction to renewable energy sources is highly recommended to support net-zero emissions. The sustainable reuse potential of offshore jacket platforms as support structures for offshore wind turbines is considered an appropriate idea to support Indonesia's energy transition. In decision-making for the reuse of aging platforms, reassessment of structural safety is necessary by considering the remaining fatigue life of the modified platform to determine its structural integrity. This study will analyze the fatigue life of Platform XYZ, located in the Java Sea, which will be operated as a 5MW offshore wind turbine. The structure will be globally analyzed using the cumulative damage method, and critical joints on the structure will be analyzed locally. The results of the cumulative damage analysis are 131 years and 98 years using the fracture mechanics method.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Fatigue Life, Jacket, Offshore Wind Turbine, Sequentially Coupled Fatigue Life, Jacket, Offshore Wind Turbine, Sequentially Coupled |
| Subjects: | T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TC Hydraulic engineering. Ocean engineering > TC1680 Offshore structures |
| Divisions: | Faculty of Marine Technology (MARTECH) > Ocean Engineering > 38201-(S1) Undergraduate Thesis |
| Depositing User: | Mega Ristri Maurina |
| Date Deposited: | 13 Aug 2024 04:05 |
| Last Modified: | 13 Aug 2024 04:05 |
| URI: | http://repository.its.ac.id/id/eprint/114306 |
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