Optimasi Pemilihan Propeller Akibat Penggantian Mesin Induk Kapal Dharma Rucitra 3

Fitri, Salsabilla Aulia (2023) Optimasi Pemilihan Propeller Akibat Penggantian Mesin Induk Kapal Dharma Rucitra 3. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kapal dapat dikategorikan berdasarkan fungsionalnya, salah satunya adalah kapal penumpang. Kapal penumpang melayani beberapa daerah yang ada di Indonesia, salah satunya KM Dharma Rucitra 3 yang melayani Bali – Lombok dan sebaliknya. Di tahun 2020 kapal ini mengalami kecelakaan dan hampir tenggelam sehingga menyebabkan mesin induknya terendam. Untuk itu perlu dilakukan repowering dengan mesin yang telah diberikan dari perusahaan yaitu Yanmar 6N21A SV dengan daya 1200 HP pada 850 RPM. Mulanya kecepatan kapal adalah 12 knot dengan data mesin GNLH 630M dengan daya 1300 HP pada 375 RPM dengan propeller B4-50. Untuk mencapai kecepatan yang diinginkan perlu adanya propeller yang optimal untuk meningkatkan performa mesin. Analisis desain yang penting pada sistem propulsi kapal adalah kecocokan propeller yang optimal dengan interaksi lambung atau engine propeller matching (EPM). Penelitian ini bertujuan untuk mengetahui dampak penggantian mesin induk terhadap kecepatan kapal serta pemilihan propeller yang sehingga kapal dapat mencapai performa tertinggi. Maka dari itu dilakukan perhitungan tahanan, evaluasi kecepatan, optimasi pemilihan propeller baru, serta engine propeller matching pada penelitian ini serta melakukan validasi dengan simulasi tahanan, open water, dan self-propulsion menggunakan computational fluid dyanmics (CFD). Setelah dilakukan perhitungan diketahui bahwa propeller existing tidak dapat beroperasi di 85%BHP mesin Yanmar 6N21A karena pembebanan yang tidak sesuai. Maka dilakukan optimasi pemilihan propeller yang menghasilkan tipe B4-49,6 dengan diameter 1,995 m sehingga dapat mencapai kecepatan 14,2 knot.
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Ships can be categorized based on their function, one of which is a passenger ship. Passenger ships serve several areas in Indonesia, one of which is KM Dharma Rucitra 3 which serves Bali - Lombok and vice versa. In 2020 this ship had an accident and almost sank causing the main engine to submerge. For this reason, it is necessary to repower with the engine that has been provided from the company, namely the Yanmar 6N21A SV with a power of 1200 HP at 850 RPM. Initially the ship's speed was 12 knots with the data of the GNLH 630M engine with a power of 1300 HP at 375 RPM with a B4-50 propeller. To achieve the desired speed, it is necessary to have an optimal propeller to improve engine performance. An important design analysis of the ship's propulsion system is the optimal propeller match with the hull interaction or engine propeller matching (EPM). This study aims to determine the impact of replacing the main engine on the speed of the ship and the selection of propellers so that the ship can achieve the highest performance. Therefore, resistance calculations, speed evaluation, optimization of new propeller selection, and engine propeller matching were carried out in this study as well as validation with resistance, open water, and self-propulsion simulations using computational fluid dynamics (CFD). After calculating, it is known that the existing propeller cannot operate at 85% BHP of the Yanmar 6N21A engine due to inappropriate loading. So, optimization of propeller selection is carried out which obtaine type B4-49,6 with a diameter of 1,995 m so that it can reach speeds of 14,2 knots.

Item Type: Thesis (Other)
Additional Information: RSSP 623.873 Fit o-1 2023
Uncontrolled Keywords: CFD, EPM, propeller optimal, repowering
Subjects: V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM731 Marine Engines
Divisions: Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User: Salsabilla Aulia Fitri
Date Deposited: 14 Feb 2023 08:43
Last Modified: 05 Sep 2023 07:30
URI: http://repository.its.ac.id/id/eprint/97017

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