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PENGARUH OPTIMALISASI RUTE PELAYARAN TERHADAP EMISI GAS BUANG DI KAPAL KMP GILIMANUK II Cicilia Kunti Dewi Cahyaningtyas; Rama Syahputra Simatupang; Intan Sianturi
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 01 (2026): Volume 11 No. 01, Maret 2026 Release
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i01.43836

Abstract

This study aims to analyze the effect of shipping route optimization on exhaust gas emissions on the KMP Gilimanuk II operating on the Ketapang–Gilimanuk route. The research method used is a quantitative approach utilizing primary and secondary data obtained from the Deck Log Book and Engine Log Book during the sea practice period. Data analysis was carried out by calculating fuel consumption and exhaust gas emissions using the Activity-Based Emission Calculation method. The results show that shipping routes influence the amount of fuel consumption and the level of exhaust gas emissions produced by the vessel. Differences in operational conditions such as travel distance, sailing duration, and ship maneuvering cause variations in fuel consumption and emissions on each route. A comparison between Route 3 and Route 19, which have the same sailing time (16 hours), shows that Route 19 produces higher emissions of 2,099.39 kg CO₂e compared to Route 3 which produces 1,994.30 kg CO₂e.Based on these findings, it can be concluded that optimizing shipping routes plays an important role in improving fuel efficiency and reducing ship exhaust gas emissions. Optimization efforts can be carried out through selecting more efficient sailing routes, regulating ship speed at an economical level, and improving operational management of shipping activities.
Pengaruh Jam Kerja Pemakaian Minyak Lumas terhadap Suhu Mesin Diesel Generator di Kapal Muchammad Afilla Nurrahman; Nasri Nasri; Wulan Marlia Sandi; Shofa Dai Robbi; Intan Sianturi
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 2 (2026): Agustus: Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i2.8673

Abstract

Generators are one of the important auxiliary aircraft needed on ships for power generation. During the operation of a diesel generator, continuous rotation occurs resulting in friction and erosion of the moving parts. The supporting factor for the smooth running of a diesel engine is a lubrication system that is supported by good lubricating oil quality, besides that it also needs to be supported by an adequate and good cooling system. The use of lubricants is one of the most important factors to ensure the performance of diesel engines. The lubricant is in charge of maintaining the condition of the engine so that it remains stable. This study aims to analyze the effect of using lubricating oil beyond the operating hours limit on engine heat. Furthermore, it also discusses steps to ensure diesel engine temperatures remain normal. This research was carried out during the practice of sailing on a ship for approximately one year. This study uses a descriptive quantitative research method. The primary data obtained directly utilizes observation methods, and documentation. Secondary data was obtained from existing articles and journals. The data analysis techniques used are descriptive analysis and inferential analysis. The results of this study show that the working hours of lubricating oil use have a significant influence on the increase in the temperature of diesel generator engines as evidenced by hypothesis tests on two engine units, namely AE1 and AE2. In the AE1 unit, a t-value of 18.467 with a significance of 0.000 was obtained, while in AE2 the t-value was 14.289 with a significance of 0.000. The significance value in both units is less than 0.05 so it can be concluded that the working hours of lubricated oil have a significant influence on the temperature of the genarato diesel engine on the ship.
Analysis of the Decrease in Compressed Air Production of the Air Compressor onboard MT Seroja III Bayhaqi Putra; Nasri; Abdi Seno; Intan Sianturi; Rika Fitriani
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): JES-TM 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.409

Abstract

The air compressor is an essential auxiliary machinery onboard MT Seroja III, playing a critical role in supporting vessel maneuverability, operational safety, and main engine starting readiness. During operations, a critical reduction in compressed air production was encountered, leading to prolonged air reservoir filling times and potential risks during ship maneuvering. This study aims to identify the root causes of decreased compressed air production in the main air compressor onboard MT Seroja III and to formulate corrective and preventive maintenance actions based on onboard observations and Fault Tree Analysis (FTA). This research employs a qualitative descriptive method, utilizing continuous monitoring parameter logs, field inspections, and semi-structured interviews with engine officers over a 12-month sea service period. The diagnostic findings using FTA indicate that the decrease in volumetric efficiency was primarily caused by high-resistance suction filter blockages, severe carbon fouling on suction and delivery valves, and piston ring degradation. Corrective maintenance involving filter purging, valve refacing, and piston ring replacement successfully restored the compressor discharge pressure to 30 bar and reduced the air receiver filling time from 45 minutes to 15 minutes. The study concludes that strict adherence to the vessel's Planned Maintenance System (PMS) is mandatory to guarantee operational safety and prevent compression loss.
Analysis of the Effectiveness of the Marine Growth Prevention System (MGPS) in Preventing Marine Organism Growth in the Engine Cooling System of MV Ever Clear Brian Pratama Timur; Monika Retno Gunarti; Nasri; Intan Sianturi; Elly Kusumawati
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 2 (2026): JES-TM 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i2.414

Abstract

The ship engine cooling system is critical for maintaining the operational stability of main and auxiliary machinery. However, biofouling within sea chests and seawater pipelines remains a prevalent issue, leading to flow obstruction, reduced heat transfer efficiency, and potential engine malfunction. While the Marine Growth Prevention System (MGPS) is designed to mitigate this via electrolysis, marine growth persisted on MV Ever Clear, indicating suboptimal system performance. This study aims to analyze the effectiveness of the MGPS in preventing biofouling and to identify factors contributing to its performance degradation. Using a qualitative descriptive method with a case study approach, data were collected through direct onboard observation, interviews with the engineering crew, and document analysis. Results indicate that the decreased effectiveness was primarily caused by insufficient electrode maintenance, unstable electrical parameters (current and voltage), and inadequate operational monitoring. These deficiencies compromised the electrolysis process, preventing sufficient ion release. It is concluded that MGPS efficacy is contingent upon stable electrical parameters, rigorous preventive maintenance, and consistent operational supervision in accordance with established procedures.