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Optimization of Reliquefaction System on Gas Carrier to Maintain The Condition and Temperature of Cargo Tank Fitri Suprapti; Susanto Susanto; Deri Hendrawan; Retno Anggoro
Dinamika Bahari Vol 4 No 1 (2023): May 2023 Edition
Publisher : Politeknik Ilmu Pelayaran Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46484/db.v4i1.351

Abstract

Transport of liquefied hydrocarbon gases and their derivatives (methane, ethane, propane, butane, ethylene, propylene and other liquefied gases) is done using gas carrier tankers. Large gas carriers are equipped with re-liquefaction system to handle cargo during the process of loading, voyaging, and unloading. A reliquefaction system is installed on gas carriers to handle the Boil off-gas (BOG) problem. Operation constraints Reliquefaction system operating the reliquefaction system include the compound characteristics, liquefaction unit operating conditions, and system performance. These issues also hinder the BOG liquefaction process. This research sought to investigate the whole operation process of the system. This case study was conducted by observing the objects directly on the MT. Chinagas Legend vessel whose main cargoes are LPG. In case studies, research is carried out by studying the phenomenon of case problems that occur directly on the object. The identified problems and its resolutions could add valueable information to science. The research results revealed that MT. Chinagas Legend had a reliquefaction system with 2-stage or 3-stage options. The former type was used for butane (C4H10) cargoes and the latter was used for propane (C3H8) cargoes. The common problem in the process of reliquefaction systems was the presence of contaminants carried with seawater and clogging the filters. A leak in the intake or discharge valve slowed down the reliquefaction process and rendered it ineffective. The problems can be overcome through periodic routine inspections on components that are directly in contact with sea water, such as sea water filters.
Pembangunan Gorong Gorong di Dusun Ngobo Meningkatkan Akses Jalan dan Kesehjateraan Masyarakat Hero Budi Santoso; Akhmad Nuriyanis; Amthori Anwar; Novita Widyaningrum; Deri Hendrawan
Journal of Community Service (JCOS) Vol. 3 No. 2 (2025)
Publisher : EDUPEDIA Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56855/jcos.v3i2.1658

Abstract

Kondisi infrastruktur yang kurang memadai di Dusun Ngobo, khususnya sistem drainase, telah lama menjadi penghambat aktivitas warga dan menurunkan produktivitas masyarakat. Melalui program pengabdian kepada masyarakat, tim dari Politeknik Maritim Negeri Indonesia bekerja sama dengan warga setempat untuk membangun gorong-gorong sebagai solusi terhadap permasalahan genangan air dan kerusakan jalan. Kegiatan ini menggunakan pendekatan partisipatif yang mencakup survei lapangan, perencanaan teknis, pelaksanaan pembangunan, serta evaluasi pasca proyek. Hasil survei menunjukkan bahwa titik-titik strategis di wilayah tersebut mengalami genangan saat hujan deras akibat tidak adanya saluran pembuangan air yang memadai. Solusi yang diterapkan meliputi pembangunan gorong-gorong beton bertulang dan pelatihan masyarakat dalam pemeliharaan saluran. Evaluasi awal menunjukkan peningkatan signifikan dalam kelancaran akses jalan dan penurunan risiko banjir. Kegiatan ini menunjukkan bahwa pembangunan berbasis kebutuhan lokal dengan pendekatan kolaboratif dapat memberikan dampak berkelanjutan terhadap kesejahteraan masyarakat. Model ini diharapkan menjadi contoh bagi pelaksanaan program serupa di wilayah pedesaan lainnya.
Co-Authors Akhmad Nuriyanis Anwar, Amthori Fitri Suprapti Hero Budi Santoso Novita Widyaningrum Susanto Susanto