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ANALISA SISTEM KERJA GAS DETECTOR DALAM MENDETEKSI KEBOCORAN GAS LPG DIKAPAL MT SC.COMMANDER LVII Ali Khamdilah; Eka Darmana
Eksergi Vol 17, No 2 (2021): MEI 2021
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1020.645 KB) | DOI: 10.32497/eksergi.v17i2.2346

Abstract

Tujuan penelitian ini dilakukan untuk mengetahui respon kerja dari unit gas detector dalam memonitor terjadinya kebocoran gas yang bisa berakibat fatal bagi manusia .dengan latar belakang terjadinya kegagalan dalam proses pendektesian kebocoran. Penelitian ini dilakukan dengan cara melakukan pengetesan dan pengujian  secara langsung terhadap pembacaan sensor gas detector untuk mengirimkan sinyal terhadap modul sensor gas detector. Penelitian dilakukan dikapal MT.SC.Commander LVII di STS kalbut Situbondo dengan pokok masalah terjadinya perubahan nilai setpoint pada modul pada unit cargo panel dan Unit  accomodation part gas detector panel berakibat pada respon pembacaan kebocoran gas LPG. Kesimpulan yang didapat  pergeseran nilai atau berubah nya nilai persen (%) akan berdampak pada pembandingan antara masukan dan keluaran pada sistem gas detector, perlunya dilakukan penyetelan ulang /kalibrasi untuk mendapatkan nilai yang diinginkan antara masukan dari sinyal yang dikirimkan sensor gas detector dengan sinyal yang diterima oleh receiver modul gas detector. Kesalahan pemasangan pada terminal kabel pada gas detector yang berakibat muculnya protection indikator trauble lamp yang menandakan adanya masalah pada sistem sensor gas detector.
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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.564 KB) | DOI: 10.33556/jstm.v22i1.269

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (689.682 KB) | DOI: 10.33556/jstm.v19i2.203

Abstract

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

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (5903.247 KB) | DOI: 10.33556/jstm.v23i1.319

Abstract

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.