OPTIMALISASI PERAWATAN LT COOLER GUNA MENDUKUNG OPERASIONALPERMESINAN DI MT. ROYALCRYSTAL7

Abstract

The freshwater cooling system is a vital component supporting the performance of the main engine on board. One of the key components in this system is the Low Temperature (LT) Cooler, which functions as a heat exchanger between freshwater and seawater. Based on observations aboard MT. Royal Crystal 7, blockages were found on the LT cooler plates as well as gasket damage, resulting in reduced cooling efficiency and freshwater temperatures exceeding normal limits. These issues are generally triggered by a lack of regular maintenance and ineffective cleaning methods. This study aims to identify the problems occurring in the LT cooler and evaluate appropriate maintenance solutions to keep the cooling system performing optimally. The research uses a descriptive approach through direct observation, documentation, literature study, and analysis using the fishbone method to determine the root causes. Two cleaning methods evaluated are backwash cleaning and manual cleaning. The results show that backwash cleaning is less effective in removing thick scale, making manual cleaning the most effective solution as it allows thorough cleaning and visual inspection of the plates and gaskets. With scheduled maintenance according to the Planned Maintenance System (PMS), cooling system efficiency can be improved and the risk of main engine damage due to overheating can be minimized.