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ANALISA PENYEBAB RUSAKNYA CARGO OIL PUMP GUNA MENUNJANG DISCHARGE CARGO PERTAMAX DI ATASKAPAL MT. PATRA TANKER 2 Wahyu Permana Aji; Eka Darmana
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol 22, No 1 (2021): September
Publisher : UNIMAR AMNI Semarang

When discharging the Pertamax cargo at the port at 10:25 a.m. local time, the on-duty engineer received information from the cargo control room that a problem had occurred, the engineer immediately went to the cargo pump room to check the condition of the cargo oil pump. The engineer is see a leak in the pump room which causes the pump room to be full of spills of Pertamax oil transported by the ship. This research is based on a case study on the ship MT. Patra Tanker 2. The data collection method was carried out by direct observation on the ship for one year and then conducted discussions and interviews with the ship's crew responsible for the cargo pump, as well as data from literature such as instruction manuals and standard operational procedures (SOP). The analysis approach was carried out in a descriptive qualitative manner based on data and various literatures used as a reference or comparison. From the results of the analysis it is stated that the cause of the damage to the cargo oil pump is due to the influence of the quality of the mechanical seal that does not meet the standard, the ball bearing is damaged or worn on the cargo oil pump, the ceramic sleeve shaft (bushing) is thinning or worn, and damage to the cargo oil pump shaft. The cause of damage to the cargo oil pump can be avoided by carrying out routine maintenance and controlling it regularly when the cargo oil pump is running.

STUDY PENANGANAN KERUSAKAN KOMPONEN YANG TERJADI PADA RTG DI TERMINAL PETI KEMAS KOJA JAKARTA Muhamad Rizki Akhbar; Eka Darmana
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol 19, No 2 (2019): Maret
Publisher : UNIMAR AMNI Semarang

Ruber Tyred Gantry (RTG) is heavy equipment for lifting containers from the jetty to the container stacking place or vice versa. It is found in all container terminals. RTG is almost the same as a Container Crane (CC) but its functions and movements are more dynamic. The CC is used on the jetty and attached to the edge of the jetty while RTG is more usable and efficient than other heavy equipment. Koja, Jakarta’s containers terminal has 25 RTG Units that operate and use a PLC (Programmable Logic Control) system for running the Spreaders, Gantries, Trolleys and Wheels as needed. RTG also capable of serving 5 to 6 lines in each block. The results of this study stated that the problems that occurred on the RTG includes: the burnout of the Gantry motor caused by the dirty motor, the broken twist lock that could cause collision between containers and also the lack of skill or understanding of the RTG operator.Keywords: Containers, Spreaders, Twist lock Ruber tyred Gantry (RTG) adalah suatu alat berat yang terdapat di semua tempat terminal peti kemas yang berguna untuk mengangkat Container (peti kemas) dari dermaga ke tempat penumpukan Container atau sebaliknya. RTG ini hampir sama dengan alat berat Container Crane (CC) tetapi fungsi dan pergerakannya lebih dinamis. CC digunakan di dermaga dan menempel di pinggir dermaga sedangkan RTG lebih leluasa digunakan dan lebih efisien dari alat berat lainnya. Di terminal peti kemas koja Jakarta memiliki 25 Unit RTG yang beroperasi dan memakai system PLC (Programmable Logic Control) dari menggerakan Spreader,Gantry, Troley dan Roda untuk berjalan sesuai keinginan operator. RTG mampu melayani 5 sampai 6 baris dalam setiap blok. Hasil dari study ini menyatakan bahwa permasalahan yang terjadi pada RTG antara lain: kebakarnya motor Gantry yang di sebabkan kotornya pada bagian dalam motor, patahnya twist lock yang disebabkan terbentur pada container dan juga kurangnya kecakapan atau pemahaman operator pada alat RTG.Kata kunci : Container, Spreader,Twist lock

ANALISIS PERUBAHAN TEMPERATUR INDUKSI MOTOR 3 PHASE BERBASIS FUZZY INFERENCE SYSTEM (FIS) Fajar Pujiyanto; Eka Darmana
JURNAL SAINS DAN TEKNOLOGI MARITIM Vol 23, No 1 (2022): September
Publisher : UNIMAR AMNI Semarang

The three-phase induction motor is an alternative to changing the diesel engine as the main driver in the industrial world. This transition is aimed at energy efficiency and reducing air pollution from diesel engine exhaust gases. It was chosen because it is easy to operate, quiet and low operating costs. Induction motors are used for driving water pumps to as the main propulsion on board vessels. Constraints and failures of induction motor components when operating, cause a decrease in performance and risk of damage. This is due to winding disturbances, increasing motor temperature, unbalanced stator and rotor, broken rotor shafts, air gap eccentricity, motor load, mechanical and environmental effects. The cause of motor damaged is increased temperatures on the motor side. It occurs due to unbalanced phase voltage (UPV), unbalanced magnet pull (UMP) and motor load (ML). This journal discusses three factors and their effect on motor temperature based on Fuzzy Inference System (FIS). FIS analysis is used to simulate changes in motor temperature which are influenced by the variable values of these three factors. This paper uses a qualitative descriptive method with literature reviews and data analysis using FIS in a Matlab application. The analysis of the change in temperature of an induction motor with the three parameters based on FIS has been successfully carried out. The result of study concludes that UPV and UMP are the dominant factors as a cause of temperature changes in the induction motor compared to ML).Ådnanes, A. K. (2003). Maritime electrical installations and diesel electric propulsion. ABB AS Marine. http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.115.966&rep=rep1&type=pdfAdvernesia. (2017). What is MATLAB and its Uses. Article/Id_ID.Ardana, I. W. R., & Sutawinaya, I. P. (2017). Pemodelan Sistem Kontroler Logika Fuzzy Pada Pengaturan Kecepatan Motor Induksi Menggunakan Perangkat Lunak Matlab / Simulink. Matrix : Jurnal Manajemen Teknologi Dan Informatika, 7(1), 1. https://doi.org/10.31940/matrix.v7i1.504Bergmeijer, P. (1992). The International Convention for the Prevention of Pollution from Ships. Ports As Nodal Points in a Global Transport System, 111(50), 259–270. https://doi.org/10.1016/b978-0-08-040994-8.50026-7Bonnett, A. H., & Soukup, G. C. (1986). in Squirrel Cage Induction Motors. I(6), 1165–1173.Bonnett, A. H., & Soukup, G. C. (1992). Cause and Analysis of Stator and Rotor Induction Motors. IEEE Transactions on Industry Applications, 28(4), 921–937.Hall, D. T. (1999). KNOWLEDGE MARINE Second Edition.International, C., Commission, E., Deshpande, V., Power, C., & No, O. (2004). Internationale International Standard. Order A Journal On The Theory Of Ordered Sets And Its Applications, 1997, 1–25.Kliman, G. B., Premerlani, W. J., Koegl, R. A., & Hoeweler, D. (1996). New approach to on-line turn fault detection in AC motors. Conference Record - IAS Annual Meeting (IEEE Industry Applications Society), 1, 687–693. https://doi.org/10.1109/ias.1996.557113Kusumadewi, S. (2003). Artificial Intelligence (Techniques and Applications). Graha Ilmu.McCoy, Gilbert A.; Douglass, J. G. (2014). Premium efficiency motor selection and application guide - A handbook for industry. 136. https://www.energy.gov/sites/prod/files/2014/04/f15/amo_motors_handbook_web.pdfMelka, B., Smolka, J., Hetmanczyk, J., & Lasek, P. (2019). Numerical and experimental analysis of heat dissipation intensification from electric motor. Energy, 182, 269–279. https://doi.org/10.1016/j.energy.2019.06.023Motors and Generator Section. (2009). NEMA Standards Publication MG 1-2009. 552, 775. https://law.resource.org/pub/us/cfr/ibr/005/nema.mg-1.2009.pdfMustafa, Demetgul, Muhammet, U. (Ed.). (1993). Parameter Estimation, Condition Monitoring and Diagnosis of Electrical Machines. 1993 (1st ed.). Janeza trdine 9. 51000 Rijeka, Croatia. https://doi.org/http://dx.d0i.org/10.5772/63169Nandi, S., Toliyat, H. A., & Li, X. (2005). Condition monitoring and fault diagnosis of electrical motors - A review. IEEE Transactions on Energy Conversion, 20(4), 719–729. https://doi.org/10.1109/TEC.2005.847955On, L. N. (n.d.). Lecture Notes on Machine-Ii.PP. (1999). Pp Ri No 41 Tahun 1999 Tentang Pengendalian Pencemaran Udara. Peraturan Pemerintah No. 41 Tentang Pengendalian Pencemaran Udara.Siddiqui, K. M., Sahay, K., & Giri, V. K. (2014). Health Monitoring and Fault Diagnosis in Induction Motor- A Review. International Journal of Advanced Research in Electrical, Electronics and Instrumentation Engineering, 3(1), 2320–3765.Squirrel, I. (n.d.). Lecture 1 Three-phase Induction Motor Construction and Principle of Operation 2 . Induction Motor Types : 1–9.Sri Kusumadewi, H. P. (2010). Fuzzy logic application for decision support. Graha Ilmu.Teknologi, I., & Seni, D. (2020). Analisa Thermal Overload Relay ( TOR ) Type Lrd08c Pada Sistem Proteksi Motor 3 Fasa Belt Conveyor. 1, 79–90.US Department of Energy. (2014). Determining Electric Motor Load Ranges. Motor Challenge, 1, 1. https://www.energy.gov/sites/prod/files/2014/04/f15/10097517.pdfWaide, P., & Brunner, C. U. (2011). Energy-Efficiency Policy Opportunities for Electric Motor-Driven Systems. Internationale Energy Agency, na(na), 132.

Analisis Kinerja Pneumatic Quick Closing Valve untuk Meningkatkan Keamanan dan Keselamatan di MT. Sultan Mahmud Badaruddin II Pangestu Sri Nugroho; Eka Darmana; Fajar Pujiyanto
JURNAL BARTEK Vol 1 No 1 (2025): Jurnal Bahari dan Teknologi [BARTEK]
Publisher : Politeknik Bumi Akpelni Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.6425/mw0dp249

The quick closing valve cannot close quickly during training (drill) due to several technical factors. Conditions like this are very dangerous, especially when a fire occurs in the engine room which requires the use of a quick closing valve which must be able to close quickly. This research aims to analyze the decreasing performance of pneumatic quick closing valves on MT ships. Sultan Mahmud Badaruddin II. The research method used is descriptive qualitative with data collection techniques through direct observation on MT ships. Sultan Mahmud Baharuddin II, interviews, and documentation studies. Data analysis was carried out using two methods, namely the Fault Tree Analysis (FTA) method to identify the causes of decreased performance of the pneumatic quick closing valve, and the USG (Urgency, Seriousness, Growth) method to determine problem handling priorities. The research results showed that the decrease in the performance of the pneumatic quick closing valve was caused by a buildup of scale and paint coating on the valve parts, corrosion on the threaded shaft, and imperfect installation of the air pipe. The impact of this reduced performance includes delays in valve closure and the potential to worsen a fire if an emergency situation occurs. The handling efforts carried out are routine checks every week as well as maintenance and repairs according to the manual book.

Peran Air Tawar Dalam Menunjang Kelancaran Pengoperasian Purifier Bahan Bakar dan Minyak Pelumas di Atas Kapal MV. Sinar Sabang Agus Saleh; Eka Darmana
JURNAL BARTEK Vol 1 No 1 (2025): Jurnal Bahari dan Teknologi [BARTEK]
Publisher : Politeknik Bumi Akpelni Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.6425/qxw2y253

The purifier on board is one of the auxiliary machines which has a very important role to produce clean fuel. The use of this clean fuel is to support the operation of the ship's main propulsion engine and diesel generator engines in producing perfect combustion. In the operation of this purifier, Purifier operation often gets less attention that fresh water is very important to support the functioning of the purifier when working to purify fuel from liquid impurities and other solid impurities, because the function of fresh water in its operation includes operating water, sealing water and de sludge water. The data collection method used in this research was direct observation on the MV Sinar Sumba ship, literature study by reviewing manual books and discussions with engineers on board. From the data during the observation, literature study and interviews then analyzed and formulated and put forward using a qualitative descriptive method. The results of this discussion explain that in the purifier there are several parts that are very closely related to the smoothness and results of fuel refining, one of which is fresh water, because if fresh water is not available according to the required standards pressure and capacity, the purifier is not will be able to function properly. For example, if there is not enough fresh water that functions as a sealing water, then the oil will come out and be wasted through the water channels into the dirty oil tank.

Analisis Kerusakan Main Engine Reversing Type Angker bar Pada Kapal MT. Alice XXV Ahmat Zainuri; Eka Darmana; Fajar Pujiyanto
JURNAL BARTEK Vol 1 No 2 (2025): Jurnal Bahari dan Teknologi [BARTEK]
Publisher : Politeknik Bumi Akpelni Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.6425/j8cte586

During the author's observation on the MT. Alice XXV vessel, an issue occurred where the ship was unable to reverse. This incident was suspected to be caused by a jammed component in the pneumatic system. The objective of this study is to analyze the main cause of the vessel's inability to reverse, as well as the prevention and handling methods to maintain operational efficiency. This research is qualitative in nature. The instruments examined include the air starting system and the pneumatic control system. Data collection methods consist of direct observation in the engine room, interviews with the ship's crew, and technical data collection. A descriptive qualitative data analysis approach was used. Additionally, an analysis was conducted on the scale buildup in various pneumatic components and the factors affecting its formation rate. The results of the study indicate that MT. Alice XXV was unable to reverse due to a jammed pneumatic component, caused by scale buildup in the pneumatic system, which impeded the transmission of the command signal to the reversing system. The scale was caused by water particles entering the pneumatic system due to condensation of air inside the air bottle. High humidity in the air bottle led to condensation and the accumulation of water within it. To address this issue, preventive measures such as regular draining of the air bottle and cleaning of pneumatic filters are required.

Analisis Pecahnya Windlass Hydraulic Motor di Kapal MV. Lumoso Aman Fendy Aula Rizalul Ilmi; Eka Darmana; Fajar Pujiyanto
JURNAL BARTEK Vol 1 No 2 (2025): Jurnal Bahari dan Teknologi [BARTEK]
Publisher : Politeknik Bumi Akpelni Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.6425/b0ab0e44

During the author's observation on the MV. Lumoso Aman, a ship in Sulawesi waters, more precisely in Bahodopi in 2023, there was damage to the hydraulic motor windlass when raising anchor in the middle of the sea and the ship's maneuvering process was delayed. This study aims to analyze the main causes of the rupture of the windlass hydraulic motor, analyze the impact on hydraulic motor damage, and prevention and maintenance methods to maintain the efficiency of ship maneuvering and loading and unloading. The research method used is a qualitative case study by conducting direct research on the MV. Lumoso Aman. The method for data collection uses 3 techniques, namely by conducting observation, documentation, and interviews. This observation was carried out on the MV. Lumoso Aman. This documentation takes photos of activities related to the incident. Interviews were conducted after the incident by taking information from electrical and machinist II. The data analysis method uses a qualitative descriptive approach by concluding various opinions, data and literature. The results of the study showed that damage to the hydraulic motor hampered ship maneuvers and loading and unloading at the port. When the hydraulic system is clogged, hydraulic oil cannot flow into the system and affects the hydraulic motor and other components. Blocked oil pressure can cause excessive heat in the hydraulic motor and at worst can be damaged. To overcome this problem, preventive measures are needed such as regular maintenance, implementation of a monitoring system on the windlass components and cleaning the hydraulic filter.

Analisis Gangguan Kerja Potensiometer Pada Modul Kendali Steering Utama Type Rexpeller MV. Fanny Fajar Pujiyanto; Ali Khamdilah; Eka Darmana; Santhi Wilastari; Dwi Sulistyorini
JURNAL BARTEK Vol 1 No 2 (2025): Jurnal Bahari dan Teknologi [BARTEK]
Publisher : Politeknik Bumi Akpelni Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.6425/6easm369

Modern ship steering systems utilizing Rexpeller Thrusters rely heavily on the accuracy of position sensor readings, particularly potentiometers. This study analyzes signal disturbances in the potentiometer of the MV Fanny steering system, characterized by instability in resistance and output voltage. A qualitative descriptive research method was employed. Measurement results indicate voltage spikes at 50° and drops at 90°, as well as resistance anomalies at 70° and 110°. These disturbances cause the control system to receive erroneous thrust position data, triggering unnecessary automatic corrective commands, known as “self-moving steering.” Resistance–voltage versus angle plots reinforce the indication of localized damage on the potentiometer’s resistive track. System simulation shows that the error signals activate the ECU, causing continuous corrective actions. The implications of this research reveal that potentiometer instability poses a serious threat to ship operational safety by inducing uncommanded rudder movements and reducing control accuracy. This underscores the necessity of upgrading sensor technology from analog potentiometers to more reliable feedback devices and implementing periodic signal monitoring. Academically, the study contributes to the development of electrical engineering knowledge by establishing the relationship between sensor degradation and control instability. Inspection findings confirm that potentiometer faults significantly disrupt ship navigation, thus requiring recalibration, physical inspection, component replacement, and the implementation of redundant sensor systems to ensure steering reliability and safety.

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