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All Journal Majalah Ilmiah Gema Maritim Marine Science and Technology Journal Jurnal Bahari dan Teknologi (BARTEK)
Eka Darmana
Politeknik Bumi Akpelni
Control & Systems Engineering Electrical & Electronics Engineering Engineering Materials Science & Nanotechnology Mechanical Engineering

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Identifikasi Turunnya Kinerja Cargo Handling pada Proses Reliquefaction Gas di Kapal LPG/C Gas Eka Darmana; Wendy WK
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Reliquefaction plant is a machine system that have function to maintain pressure in the cargo tank. And has an important role in the process of cargo handling to keep cargo in a liquid state. The problems that occur in the reliquefaction plant will result in a decline in the performance of the cargo handling process which will result in hampered vessel operational activities. The observation was carried out at LPG / C GAS WALIO which is a ship owned by PT. PERTAMINA. The source of the data obtained by the author is obtained by direct observation at the research site and direct interviews with gas engineers and engineers at the research site. In addition, data sources are also obtained from manual books on the ship. The results of the study stated that the decline in cargo handling performance in the gas reactivity process was caused by several factors including: less than the maximum compression of the cargo compressor, lack of the amount of sea water circulated into the system and the lack of vacuum in the cargo condensor. These things result in not achieving the ideal temperature on the chargo and the process of reliquefaction takes a long time.
Pemanfaatan Engine Log Book Sebagai Sumber Data Untuk Melakukan Analisa Kuantitatif Kehandalan Dan Perawatan Permesinan Di Kapal Ratna Dwi Kurniawan; Eka Darmana
Majalah Ilmiah Gema Maritim Vol 21 No 1 (2019): Gema Maritim Vol 21 No 1 tahun 2019 tanggal 31 Maret 2019
Publisher : Politeknik Bumi Akpelni

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (991.955 KB) | DOI: 10.37612/gema-maritim.v21i1.8

Abstract

Melihat beberapa catatan harian kamar mesin (engine Log Book) di kapal, dapat diketahui bahwa perawatan permesinan yang dilakukan masih bersifat konvensional, perawatan dilakukan hanya saat komponen/sistem mengalami kegagalan atau saat kapal berlabuh. Berbagai metode perawatan dapat dilakukan untuk mencapai unjuk kerja dan biaya yang optimum. Dalam studi ini menawarkan analisa kehandalan secara kuantitatif dengan memanfaatkan data yang sudah ada dari engine log book, dengan sample perawatan pada sistem bahan bakar dari Main Engine. Sebagai output Analisa kuantitatif ini akan dapat diketahui nilai reliability dan unreliability sebagai fungsi waktu dan rata-rata waktu komponen akan mengalami kegagalan. Selain itu akan diketahui tren grafik laju kegagalan sehingga dapat diketahui apakah komponen dalam masa operasional atau sudah memasuki masa wear out / aus. Harapannya metode ini dapat diadopsi sebagai bahan pertimbangan dalam melakukan perawatan permesinan di kapal.
Studi Perbaikan Kerusakan Ejector pada Sistem Pembuangan Ballast di Kapal MV. Sari Indah Rio Irfan Aziz; Eka Darmana
Majalah Ilmiah Gema Maritim Vol 21 No 2 (2019): Gema Maritim Vol 21 No 2 tahun 2019 tanggal 30 September 2019
Publisher : Politeknik Bumi Akpelni

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1209.324 KB) | DOI: 10.37612/gema-maritim.v21i2.23

Abstract

Ejector adalah komponen penting dalam sistem pembuangan ballast yang berfungsi untuk menghisap ballast dari tangki ke laut lepas menggunakan vakum dari tekanan rendah yang dihasilkan oleh nozzle dan cairan penggerak. Mengingat pentingnya peranan ejector di sistem pembuangan ballast, maka prosedur dalam pembuangan ballast harus dilakukan dengan benar sesuai dengan manual book, dan perawatan terhadap komponen di dalam sistem pembuangan ballast harus selalu diperhatikan. Tujuannya dari perawatan komponen tersebut agar selalu siap digunakan untuk kegiatan deballasting selama proses bongkar muat MV. SARI INDAH di pelabuhan.Berdasarkan hasil observasi, ada beberapa komponen dalam sistem pembuangan ballast yang mengalami kerusakan seperti ejector, manometer, dan valve penghubung antara tangki ballast dengan ejector yang harus diganti. Penggantian komponen ini dilakukan demi kelancaran proses bongkar muat. Sistem pembuangan ballast akan bekerja dengan baik apabila pengoperasiannya dilakukan sesuai dengan prosedur yang ada di manual book. Jika mengalami masalah segera melakukan perbaikan supaya tidak menghambat proses bongkar muat.
Analisis Keandalan Pressure Transmitter dalam Mendeteksi Low Pressure Oil sebagai Pemicu Shutdown Generator di Kapal MV. Nameera Dimas Dwi Junanda; Eka Darmana; Priyanto Priyanto
JURNAL BARTEK Vol 2 No 2 (2026): Jurnal Bahari dan Teknologi [BARTEK]
Publisher : Politeknik Bumi Akpelni Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.6425/aa3v7v57

Abstract

The protection system on the MV Nameera failed to trigger an alarm when the pressure dropped to the 0.25 MPa threshold, resulting in a blackout. This study aims to evaluate the reliability of the pressure transmitter in detecting low lubricating oil pressure conditions, identify factors influencing its accuracy and reliability, and explain the generator shutdown mechanism triggered by low lubricating oil pressure signals in the MV Nameera's diesel generator. A qualitative case study approach was employed. Data collection involved direct observation, interviews with engine department crew members, documentation review, and a literature study. Data analysis was conducted qualitatively—utilizing data reduction, data presentation, and conclusion drawing—to assess pressure transmitter reliability, performance-influencing factors, and the shutdown mechanism associated with low oil pressure. The results indicate that pressure transmitter reliability is influenced by the sensor's condition, the cleanliness of the lubricating oil pressure line, electrical installation issues, calibration accuracy, and the performance of the lubricating oil pump. When lubricating oil pressure falls below the established set point, the pressure transmitter sends a signal to the control system, prompting the protection system to execute the generator shutdown sequence. Consequently, routine inspections, preventive maintenance, and periodic calibration are essential to maintain measurement accuracy and enhance the reliability of the diesel generator's protection system.
Co-Authors Dimas Dwi Junanda Priyanto Priyanto Ratna Dwi Kurniawan Rio Irfan Aziz Wendy WK