Tanjung, Zulfadli (2026) Analisis Dan Optimasi Strategi Perawatan Mode Gas Dual Fuel Engine Harbour Tug Menggunakan Pendekatan Reliability Centered Maintenance (RCM). Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penggunaan mesin dual fuel pada kapal semakin berkembang sebagai upaya meningkatkan efisiensi energi dan menurunkan emisi gas buang seiring meningkatnya tekanan regulasi dekarbonisasi maritim global. Namun demikian, pengoperasian mesin pada mode gas memiliki tingkat kompleksitas dan karakteristik kegagalan yang berbeda dibandingkan mode diesel, sehingga diperlukan strategi perawatan yang mampu menjamin keandalan dan keselamatan operasional. Pendekatan perawatan konvensional berbasis time-based maintenance seringkali belum mampu mengidentifikasi komponen kritis serta risiko kegagalan secara menyeluruh karena hanya didasarkan pada interval waktu tanpa mempertimbangkan karakteristik kegagalan aktual setiap komponen.
Penelitian ini menggunakan metode Reliability Centered Maintenance (RCM) berbasis ABS (2004) untuk menganalisis dan mengoptimasi strategi perawatan sistem mode gas pada Harbour Tug ASD Kapal Tug X, kapal tunda pertama di Indonesia yang beroperasi dengan sistem Dual Fuel Diesel-LNG menggunakan mesin N**XXTA 6L28AHX-DF. Metodologi penelitian meliputi identifikasi fungsi dan kegagalan fungsi sistem, analisis mode kegagalan melalui FMECA dengan penilaian risiko berbasis Consequence of Failure (CoF) dan Probability of Failure (PoF) , serta penentuan tugas perawatan melalui diagram keputusan RCM. Data penelitian diperoleh dari kombinasi data histori kegagalan aktual, dokumen teknis OEM, database OREDA, dan validasi ahli melalui kuesioner terstruktur yang melibatkan praktisi dan akademisi di bidang permesinan kapal dual fuel. Hasil penelitian mengidentifikasi delapan komponen Maintenance Significant Items (MSI) dalam rantai suplai gas Fuel Gas Supply System (FGSS), dengan empat belas mode kegagalan yang dianalisis. Validasi ahli mengonfirmasi konsistensi sebagian besar mode kegagalan terhadap penilaian awal peneliti, serta memperbarui nilai risiko pada beberapa mode kegagalan yang sebelumnya underestimated. Seluruh tiga belas rekomendasi maintenance task diterima oleh para ahli. LP Vaporizer, WG Circulation Pump, V3001/SM3001 Gas Supply Valve, dan ECM Engine Controller merupakan komponen dengan tingkat risiko tertinggi yang memerlukan penanganan prioritas.
Program perawatan RCM yang dihasilkan mengintegrasikan lima jenis maintenance task sesuai karakteristik kegagalan setiap komponen, mencakup Condition-Based Maintenance untuk komponen dengan pola kegagalan acak, Preventive Restoration untuk komponen wear-out, dan Failure-Finding Task untuk komponen hidden safety. Dibandingkan pendekatan time-based maintenance yang diterapkan saat ini, program RCM yang direkomendasikan diperkirakan mampu meningkatkan ketersediaan mode gas secara signifikan dan meminimalkan risiko kegagalan yang berdampak pada keselamatan operasional dan kontrak operasional kapal
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The adoption of dual fuel engines aboard vessels has grown considerably as a means of improving energy efficiency and reducing exhaust emissions in response to mounting pressure from global maritime decarbonisation regulations. However, operating an engine in gas mode involves substantially greater system complexity and distinctly different failure characteristics compared to diesel mode, necessitating a maintenance strategy capable of ensuring both operational reliability and safety. Conventional time-based maintenance (TBM) approaches often fall short of comprehensively identifying critical components and failure risks, as they rely solely on fixed time intervals without accounting for the actual failure characteristics of individual components.
This study applies a Reliability-Centered Maintenance (RCM) methodology following the ABS Guidance Notes (2004) to analyse and optimise the gas mode maintenance strategy of the Fuel Gas Supply System (FGSS) aboard Harbour Tug ASD Kapal Tug X — Indonesia's first harbour tug to operate on an LNG-diesel dual fuel system equipped with a 6-cylinder dual fuel main engine. The research methodology encompasses system function and functional failure identification, failure mode analysis through FMECA with risk assessment based on Consequence of Failure (CoF) and Probability of Failure (PoF), and maintenance task selection via the RCM decision diagram. Research data were obtained from a combination of actual operational failure records, OEM technical documentation, the OREDA database, and expert validation through a structured questionnaire involving practitioners and academics in the field of dual fuel marine engineering. The study identified eight Maintenance Significant Items (MSIs) within the FGSS gas supply chain, covering fourteen failure modes subjected to full FMECA analysis. Expert validation confirmed the consistency of the majority of failure modes against the researcher's initial assessments, while revising risk scores for several modes that had been previously underestimated. All thirteen maintenance task recommendations were accepted by the expert panel. The LP Vaporizer, WG Circulation Pump, V3001/SM3001 Gas Supply Valve, and Engine Control Module (ECM) were identified as the components carrying the highest risk levels requiring priority attention.
The resulting RCM maintenance programme integrates five categories of maintenance tasks aligned with the failure characteristics of each component, comprising Condition-Based Monitoring for components exhibiting random failure patterns, Preventive Restoration for wear-out components, and Failure-Finding Tasks for hidden safety-critical components. Compared to the current time-based maintenance approach, the recommended RCM programme is projected to significantly improve gas mode availability and minimise failure risks with consequences for both operational safety and the vessel's commercial service obligations
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Dual Fuel Engine, Harbour Tug, Reliability Centered Maintenance, Strategi Perawatan, Mode Gas, Maintenance Strategy |
| Subjects: | V Naval Science > VC Naval Maintenance > VC 270-279 Equipment of vessels, supplier,allowances,etc V Naval Science > VC Naval Maintenance |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36101-(S2) Master Theses |
| Depositing User: | Zulfadli Tanjung |
| Date Deposited: | 04 Aug 2026 07:45 |
| Last Modified: | 04 Aug 2026 07:45 |
| URI: | http://repository.its.ac.id/id/eprint/143339 |
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