Sandjaja, Irfan Eko (2023) Kajian Modifikasi Distribusi Pitch pada Propeller B6.40 KapaL Mini LNG Carrier Berbasis Metode Numerik. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Biaya operasional sarana tranportasi yang ekominis dengan menggunakan kapal, namun pada pengoperasiannya menimbulkan masalah di pencemaran. Kapal memberi sumbangan emisi gas dari pembakaran BBMnya dan jenisnya (fosil) yang kurang ramah dengan volume cukup besar, berkaitan dengan itu The International Maritime Organisation (IMO) pada tahun 2011 telah mengeluarkan standar desain yang dikenal dengan Energy Efficiency Design Index (EEDI) tentang jumlah maksimal gas CO2 yang diizinkan. Pemilihan jenis bahan bakar dan efisiensi konsumsi BBM merupakan langkah untuk merespon standar tersebut. Liquefied Natural Gas (LNG) merupakan bahan bakar yang sangat kompetitif sehingga pemakaian LNG berkembang secara pesat, faktor ini memicu pertumbuhan armada pendistrubusiannya. Untuk mendukung pendistribusian tersebut Pusat Teknologi Rekayasa Industri Maritim (PTRIM-BPPT) melakukan kajian desain kapal tersebut untuk mengangkut LNG (Kapal Mini LNG Carrier) pada tahun 2020. Efisiensi BBM dilakukan dengan memperkecil daya dorong kapal melalui optimasi bentuk lambung serta pemilihan sistem propulsi yang efisien. Propeller merupakan bagian dari sistem propulsi yang dapat ditingkatkan efisiensinya, pada kajian ini peningkatan efisiensi propeller dilakukan dengan modifikasi dari distribusi propeller B6.40 yang direncanakan untuk Kapal Mini LNG Carrier, modifikasi dilakukan dari propeller B6.40 standar Wageningen yang bertipe constant-pitch menjadi variable-pitch (high-thrust) pada 3 propeller modifikasi. Kajian dilakukan secara numerik dengan menggunakan software NUMECA, yang divalidasi dengan menggunakan pengujian tahanan dan self propulsion model di Laboratorium Hidrodinamika Indonesia (LHI) serta hasil Open Water Test (OWT) propeller B Series Wageningen. Hasil OWT berupa Koefisien gaya dorong (KT), Koefisien Torque (KQ) dan Koefisien Advance (J) digunakan sebagai data input pada simulasi numerik self propulsion test. Hasil self propulsion test berupa Koefisien gaya dorong (KT), Koefisien Torque (KQ) dan Koefisien Advance (J) dan putaran propeller (rps) merupakan harga untuk mendapatkan besarnya Koefisien Propulsi (PC). Dari hasil kajian ini didapatkan PC terbaik pada variable pitch B6.40 modifikasi tipe 3 sebesar ± 4 %, dari tipe standar
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The cost of operating an economical means of transport using ships, but its operation causes problems in pollution. Ships contribute gas emissions from the combustion of fuel, and its type (fossil) which is less friendly with a large enough volume, related to that The International Maritime Organisation (IMO) in 2011 has issued a design standard known as the Energy Efficiency Design Index (EEDI) on the maximum amount of CO2 gas allowed. The choice of fuel type and fuel consumption efficiency are steps to respond to these standards. Liquefied Natural Gas (LNG) is a very competitive fuel so that the use of LNG is growing rapidly, this factor triggers the growth of its distribution fleet. To support the distribution, the Maritime Industrial Engineering Technology Centre (PTRIM-BPPT) conducted a design study of the ship to transport LNG (Mini LNG Carrier Ship) in 2020. Fuel efficiency is done by reducing the thrust of the ship through hull shape optimisation and selection of an efficient propulsion system. The propeller is part of the propulsion system that can be increased in efficiency, in this study the increase in propeller efficiency is carried out by modifying the distribution of the B6.40 propeller planned for the Mini LNG Carrier Ship, the modification is made from the Wagenineng standard B6.40 propeller which is a constant-pitch type to variable-pitch (high-thrust) on 3 modified propellers. The study was carried out numerically using NUMECA software, which was validated using resistance testing and self propulsion models at the Indonesian Hydrodynamics Laboratory (LHI) as well as the results of the Open Water Test (OWT) of the B Series propeller. The OWT results in the form of Thrust Coefficient (KT), Torque Coefficient (KQ) and Advance Coefficient (J) are used as input data in the numerical simulation of the self propulsion test. The results of the self propulsion test in the form of Thrust Coefficient (KT), Torque Coefficient (KQ) and Advance Coefficient (J) and propeller rotation (rps) are the price to get the amount of Propulsion Coefficient (PC). From the results of this study, the best PC is obtained at variable pitch B6.40 modified type 3 by ± 4%, from the standard type
Item Type: | Thesis (Masters) |
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Uncontrolled Keywords: | CFD, Propeller Design, Propeller Pitch Distribution, Self Propulsion Test; CFD, Desain Propeller, Distribusi Picth Propeller, Self Propulsi Test. |
Subjects: | V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM753 Propellers |
Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses |
Depositing User: | Irfan Eko Sandjaja |
Date Deposited: | 01 Aug 2023 06:43 |
Last Modified: | 01 Aug 2023 06:43 |
URI: | http://repository.its.ac.id/id/eprint/99827 |
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