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All Journal J-Sil (Jurnal Teknik Sipil dan Lingkungan) Science and Technology Indonesia Journal of Geoscience, Engineering, Environment, and Technology AGRISAINTIFIKA Jurnal Ilmu-ilmu Pertanian Jurnal Global Citizen : Jurnal Ilmiah Kajian Pendidikan Kewarganegaraan Pendas : Jurnah Ilmiah Pendidikan Dasar AGROSAINSTEK: Jurnal Ilmu dan Teknologi Pertanian Jurnal Pengabdian Magister Pendidikan IPA IJGIE (International Journal of Graduate of Islamic Education) International Journal of Social Science, Educational, Economics, Agriculture Research, and Technology (IJSET) Jurnal Pusat Inovasi Masyarakat Jurnal Pendidikan Administrasi Perkantoran (JPAP) Jurnal Teknik Sumber Daya Air Jurnal Teknologi dan Manajemen Industri Terapan Journal of Law, Poliitic and Humanities Jurnal Akuntansi Trisakti International Journal of Community Service (IJCS) Journal of Scientific Research, Education, and Technology International Conference on Health Science, Green Economics, Educational Review and Technology (IHERT) International Journal of Asian Business and Management (IJABM) Jurnal Ilmu Manajemen Dan Kewirausahaan (JIMK) Lentera Jagur: Jurnal Agroteknologi Journal of Engineering Science and Technology Management Jurnal 7 Samudra Politeknik Pelayaran Surabaya International Journal Multidisciplinary COUNT: Journal of Accounting, Business and Management Jurnal Dedikasi Masyarakat Jurnal Hasil Pengabdian Kepada Masyarakat Universitas Jember IJHABS Jurnal Pengabdian Kepada Masyaraka Pelita Nusantara Bionature META - JOURNAL J-Sil (Jurnal Teknik Sipil dan Lingkungan)
Sutoyo
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Journal : Journal of Engineering Science and Technology Management

 1 
Efforts to Increase Boil-Off Gas (BOG) Without Fuel Gas Pump in The State of Ballast Voyage at M.T. Coral Energy Airlangga, Areza Putri; Sutoyo; Kusumawati, Elly; Firdaus, Imam
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.333

Abstract

This study examines practical efforts to increase Boil-Off Gas (BOG) production without relying on the Fuel Gas Pump (FGP) during ballast voyage on the M.T. Coral Energy. In this condition, the vessel carries only a small amount of heel cargo, causing limited natural evaporation and a significant drop in tank pressure, which often results in insufficient BOG supply for the main engine. These operational constraints highlight the need for an alternative strategy that is both efficient and safer for cryogenic equipment.Using a qualitative descriptive approach, the research incorporates direct observation, structured interviews with deck officers, and operational documentation from the vessel. Data were analyzed using a fishbone framework to trace the root causes of low BOG production, focusing on technical, environmental, and human-factor aspects. The findings show that applying the top spray method using the deepwell pump effectively increases tank pressure and stabilizes BOG availability during ballast voyage. This method helps maintain a consistent gas supply for propulsion without adding mechanical load or maintenance risks to the FGP. The success of this approach depends largely on accurate flow control, careful pressure monitoring, and the crew’s understanding of the operational procedure. Overall, the study concludes that top spray is a reliable and energy-efficient alternative for BOG management when FGP use is minimized. The results are expected to support LNG carrier operations, particularly in optimizing fuel systems under low-cargo condition.
Optimizing The Implementation of Tank Coolingdown to Prepare For The LNG Loading Process on LNG Carrier Pan Africa Ships Dzaky, Muhammad Ahyar; Sutoyo; Kusumawati, Elly; Nur Prasetyo, Anugrah
Journal of Engineering Science and Technology Management (JES-TM) Vol. 6 No. 1 (2026): Maret 2026
Publisher : Journal of Engineering Science and Technology Management

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jestm.v6i1.334

Abstract

LNG cargo tanks are specifically designed to transport liquefied gas, and the coolingdown process becomes a critical stage prior to loading. This process is performed by spraying liquid gas through spray nozzles installed on the tank dome. This study employs a descriptive qualitative method, with data collected through observation, interviews, and documentation. The data were analyzed using the Miles and Huberman model, which consist of data condensation, data display, and conclusion drawing. The findings indicate that the coolingdown process on LNG/C Pan Africa generally complies with SIGTTO and IGC Code standards. However, two major issues were identified: a leakage in the cooldown valve on loading line number 2 caused by corrosion, which reduced the cooling rate from the standard 20°C/hour to approximately 10°C/hour, and a 1.5 hour delay in operating nitrogen system, which resulted in the IBS pressure not reaching the required 0.2-0.4 kPa. The study concludes that optimization of the coolingdown process can be achieved through preventive maintenance of the cooldown valve, improved coordination among officers, and enchanced accuracy in monitoring temperature and pressure. These recommendations are expected to improve the efficiency and safety pf LNG loading operations.
Co-Authors Abdus Shomad Agustina Nurhayati Ahmad Zainuddin Airlangga, Areza Putri Allatifa, Mumthaza Ama Farida Sari Amaral, Carmelita Maria AMELIA SETYAWATI, AMELIA Anita Trisiana Anita Trisiana, Anita Apri Winge Adindo Arien Heryansyah Arif Yusron Afifi Aryani Sairun Aswat, Amarilla Bagus Saefulloh, Bagus Bambang Widiyatmoko Bayu Eko Broto Binti Mohd Mustamil , Norizah Budiman, Michael Jayanto Chairul Baria Chairul Bariah Chairul Bariah Chusnul Arif dedi irawan Dina Hendiani Dina Hendiyani Dini Pramudita Fatika Sari Dwi Hanto Dzaky, Muhammad Ahyar Eko Daryanto Elly Kusumawati Endang Syahriani Endriatmoko, Yosa Erizal Fajrinur Fajrinur Fatimah Zuhra Fausan, Ahmad Ferdiananda Chadafi, Muhammad Firdaus, Imam Fuad Bahrul Ulum Galaciano, Antoninho Benjamin Marcos M.G. Do Rego Gustian Hafiz Ramadhan Samsuri Handini, Oktiana Handoyo, GTPAK Hanita, Margaretha Harley Agustian Harnas, Hafid Hayanuddin Safri Hayati, PK Dewi Hendiani, Dina Hera Heru Sri Suryanti Herlambang, Sri Mulyanto Hidayatulloh, Yasykur Husna, Syifa Ul Ibadil Maula, Farij Imam Firdaus Ines Laras Sati Irianto Uripan, Koen ISGUNANTO, TEGUH Kornelis, Veri Kusumawati, Elly Kuswandi Ludi Wishnu Wardana Lukman M Yusuf Maghriza, Zachri Mahfud M Gamar Muhammad Luthfi Muhammad Nur Ichwan Muhammad Reza MULYADI Nafisah, A'isy Fiklik NASUTION, ATIKA AINI Nasya Nathalia Navrynda Putri Nelly Nur Prasetyo, Anugrah Oktakia, MS Dela Osijo, Immanuel Ustradi Oxaria Silviana Devi Prastiyono, Suryo Prawira, Gilang Indracakti Purwanti, Eny Wahyuning Purwanto, Moh Yanuar J Putra, Heriansyah Rahmad Khalis Rahmi Rahmi Rahmi Ramadhanis, Zainab Rantelino, Owen Riri Anggriani Rita Zahra Rosyadah, Rani Safri, Hayanuddin Saktioto Samad, Yusuf A Sandi, Ramona Sattya Arimurti Satyanto Krido Saptomo Sidik, Rizqi Fahma Soetikno, Lie Djaja Sofiyuddin, Hanhan A. Soleha, Siti Nur Son Ali Akbar Sri Murniyanti Sri Suryaningsum Sufritayati Suminar, Lintang Suri, Sulih Almaudi SUTOMO Syafiudin, Moh Fifik syahriani, endang Tri Putri Utami Tri Sudibyo Uripan , Koen Irianto Vicki Dwi Purnomo Warnita Widowati Wijayantara, Adi Putra Yundrawan Ega Wibowo Yustiana, Dewi Yusuf A Samad Zafira, Aura Putri Zuhri Nurisna Zulfikar Zuriani Ritonga