Optimisasi Desain Cargo Containment System Tipe Membrane pada Kapal LNG

Risal, Alvian Syiham (2026) Optimisasi Desain Cargo Containment System Tipe Membrane pada Kapal LNG. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Seiring meningkatnya kebutuhan global terhadap energi bersih, Liquefied Natural Gas (LNG) menjadi salah satu solusi utama karena emisi karbonnya yang relatif rendah dan efisiensinya dalam penyimpanan serta transportasi. Dalam mendukung distribusi LNG, desain kapal pengangkut LNG menjadi aspek penting, khususnya pada cargo containment system yang harus mampu menjaga kondisi kriogenik muatan. Salah satu tipe tangki yang banyak diterapkan pada kapal LNG adalah membrane tank tipe NO96, yang menggunakan kombinasi material insulasi seperti plywood, RPUF, dan perlite. Sistem insulasi pada tangki ini dirancang untuk menahan suhu hingga -162°C, namun konfigurasi insulasi yang digunakan masih memiliki peluang untuk dioptimalkan, terutama dalam hal efisiensi termal dan volume ruang muat. Penelitian ini bertujuan untuk memperoleh konfigurasi sistem insulasi LNG yang optimal dalam hal ketebalan dan kombinasi material, dengan tetap menjaga laju perpindahan panas serta memaksimalkan volume ruang muat. Metode optimisasi yang digunakan yaitu metode Coarse-to-Fine Parametric Optimization dengan bantuan bahasa pemrograman python. Proses optimisasi mempertimbangkan berbagai batasan dari regulasi International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC) Code yaitu kemampuan material dalam menjaga suhu minimum yang harus sesuai dengan kondisi muatan yang dibawa (LNG). Desain hasil optimisasi memiliki penambahan ruang muat sebesar 2176.875 m3 atau 1.729% dengan tetap mempertahankan kemampuan material dalam menjaga suhu kondisi muatan LNG. Biaya material sistem insulasi yang sudah dioptimisasi tersebut sebesar Rp 400 miliar.
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As global demand for clean energy continues to increase, Liquefied Natural Gas (LNG) has emerged as a key solution due to its relatively low carbon emissions and high efficiency in storage and transportation. In supporting LNG distribution, the design of LNG carriers plays a crucial role, particularly the cargo containment system, which must be capable of maintaining cryogenic conditions of the cargo. One of the most widely applied tank types in LNG carriers is the NO96 membrane tank, which utilizes a combination of insulation materials such as plywood, rigid polyurethane foam (RPUF), and perlite. The insulation system of this tank is designed to withstand temperatures as low as −162 °C; however, the current insulation configuration still offers opportunities for optimization, particularly in terms of thermal efficiency and cargo volume utilization. This study aims to obtain an optimal LNG insulation system configuration in terms of thickness and material combination, while maintaining acceptable heat transfer rates and maximizing cargo volume. The optimization method employed is the Coarse-to-Fine Parametric Optimization, implemented using the Python programming language. The optimization process considers various constraints imposed by the International Code for the Construction and Equipment of Ships Carrying Liquefied Gases in Bulk (IGC Code), particularly the capability of materials to maintain the minimum required temperature in accordance with LNG cargo conditions. The optimized design results in an additional cargo volume of 2176.875 m³, equivalent to an increase of 1.729%, while maintaining the material’s capability to preserve the required LNG cargo temperature conditions. The material cost of the optimized insulation system amounts to IDR 400 billion.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	LNG, CCS, Optimisasi, Tipe Membrane, LNG, CCS, Optimization, Membrane Type
Subjects:	V Naval Science > VK > VK235 Cargo handling. V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM156 Naval architecture
Divisions:	Faculty of Marine Technology (MARTECH) > Naval Architecture and Shipbuilding Engineering > 36201-(S1) Undergraduate Thesis
Depositing User:	Alvian Syiham Risal
Date Deposited:	03 Feb 2026 02:39
Last Modified:	03 Feb 2026 02:39
URI:	http://repository.its.ac.id/id/eprint/131937

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