OPTIMALISASI PROSES PENDINGINAN CARGO TANK SEBELUM LOADING MUATAN METHANE DI KAPAL LNG CARRIER GOLDEN ISAIA

Abstract

This study aims to analyze and optimize the cargo tank cooling (cooldown) process before methane loading on LNG/C Golden Isaia. The cooldown process is essential to ensure safe temperature conditions and prevent thermal shock. However, operational issues such as schedule changes and instability of Boil Off Gas (BOG) often reduce cooling efficiency and increase heel LNG consumption. This research uses a descriptive qualitative method with data collected through observation, interviews, and documentation during sea practice. The data were analyzed using Fishbone Analysis to identify the root causes of inefficiencies. The results show that schedule changes affect cooling planning and duration, while unstable BOG causes pressure fluctuations that disrupt the process. These factors reduce operational efficiency and may increase safety risks. To improve the process, adaptive planning, stable BOG control, and efficient use of heel LNG and spray systems are recommended.