Analisis Kebutuhan Bollard Pull pada Proses Offloading Side-by-Side Struktur Apung FSRU-LNGC

Ramadhan, Ricky Azhar (2024) Analisis Kebutuhan Bollard Pull pada Proses Offloading Side-by-Side Struktur Apung FSRU-LNGC. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Peningkatan penggunaan Liquefied Natural Gas (LNG) sebagai sumber energi bersih telah menjadikan Floating Storage and Regasification Units (FSRU) semakin penting dalam rantai pasokan energi global. Transfer LNG yang efisien dan aman dari LNG Carriers (LNGC) ke FSRU selama operasi bongkar muat sangat penting untuk menjaga pasokan gas alam. Penelitian ini mengevaluasi kebutuhan bollard pull kapal tunda selama proses bongkar muat side-by-side antara FSRU dan LNGC. Menggunakan metode numerik dan perangkat lunak khusus, karakteristik gerakan sistem FSRU-LNGC dianalisis secara komprehensif, termasuk respons dinamis terhadap eksitasi gelombang reguler. Pemodelan numerik dilakukan untuk mensimulasikan kondisi lingkungan nyata seperti angin, gelombang, dan arus, dengan model yang divalidasi untuk memastikan akurasi prediksi. Hasil penelitian menunjukkan bahwa karakteristik gerakan FSRU dan LNGC sangat dipengaruhi oleh arah datangnya gelombang. Nilai maksimum Response Amplitude Operator (RAO) untuk gerakan surge, sway, dan heave terjadi pada arah gelombang tertentu: 180 derajat untuk surge, dan 90 derajat untuk sway dan heave. Pada arah 90 derajat, gaya maksimum yang bekerja pada semua tali tambat melebihi batas aman, yang dapat menyebabkan tali putus saat terkena beban lingkungan. Oleh karena itu, operasi pada heading 90 derajat harus dihentikan untuk memastikan keselamatan operasional. Analisis kebutuhan daya kapal tunda menunjukkan bahwa gaya terbesar terjadi pada arah 90 derajat, menyebabkan kebutuhan daya tugboat mencapai dua kali lipat dari rata-ratanya. Penelitian ini memberikan wawasan penting tentang kebutuhan operasional untuk memastikan keamanan dan efisiensi proses bongkar muat. Hasilnya sangat berharga bagi perusahaan yang mengoperasikan FSRU atau merencanakan proyek FSRU baru, memberikan panduan tentang kebutuhan bollard pull kapal tunda yang optimal. Penelitian ini mendukung pengembangan berkelanjutan industri LNG dengan meningkatkan keandalan dan efisiensi operasi transfer LNG.
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The increasing use of Liquefied Natural Gas (LNG) as a clean energy source has highlighted the importance of Floating Storage and Regasification Units (FSRU) in the global energy supply chain. Efficient and safe LNG transfer from LNG Carriers (LNGC) to FSRUs during offloading operations is crucial for maintaining a continuous natural gas supply. This study evaluates the bollard pull requirements for tugboats during the side-by- side offloading process between FSRUs and LNGCs. Utilizing numerical methods and specialized software, the motion characteristics of the FSRU-LNGC system were comprehensively analyzed, including dynamic responses to regular wave excitations. Numerical modeling was conducted to simulate real-world environmental conditions such as wind, waves, and currents, with validated models ensuring predictive accuracy. The results indicate that the motion characteristics of FSRUs and LNGCs are significantly influenced by wave direction. The maximum Response Amplitude Operator (RAO) values for surge, sway, and heave motions occur at specific wave directions: 180 degrees for surge, and 90 degrees for sway and heave. At 90 degrees, the maximum forces acting on all mooring lines exceed safety limits, potentially causing line breakage under environmental loads. Consequently, operations at a 90-degree heading should be halted to ensure operational safety. The analysis of tugboat power requirements revealed that the greatest forces occur at a 90-degree heading, necessitating tugboat power to be twice the average. This research provides critical insights into operational requirements to ensure the safety and efficiency of offloading processes. The findings are valuable for companies operating FSRUs or planning new FSRU projects, offering guidance on optimal tugboat bollard pull requirements. This research supports the sustainable development of the LNG industry by enhancing the reliability and efficiency of LNG transfer operations.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Bollard Pull, FSRU, LNGC, Operasi Bongkar Muat, Response Amplitude Operator (RAO),Bollard Pull, FSRU, LNGC, Offloading Operation, Response Amplitude Operator (RAO)
Subjects:	V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM161 Ships--Hydrodynamics V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM464 Towboats. Tugboats
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Ricky Azhar Ramadhan
Date Deposited:	06 Aug 2024 07:32
Last Modified:	06 Aug 2024 07:32
URI:	http://repository.its.ac.id/id/eprint/113950

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