Abstract:
The Fresh Water Generator (FWG) plays a critical role onboard by producing potable
water from seawater through a thermal distillation process. However, issues often arise
when the Fresh Water Generator (FWG) is not in use, particularly the formation of salt
crystallization on the evaporator surface. This build-up can lead to a significant drop in
freshwater production efficiency when the Fresh Water Generator (FWG) is reactivated,
increasing the frequency of emergency maintenance and potentially disrupting vessel
operations.
This study aims to explore a preventive maintenance approach through the application of
detergent immersion treatment on the FWG’s evaporator during idle periods. A
qualitative descriptive method was used to understand the real conditions and treatment
effectiveness. Data were gathered through direct field observations, analysis of technical
documents such as logbooks and maintenance records, and interviews with key engine
crew members—specifically the third engineer and oiler C—onboard the MV. Pan
Quantum.
The findings reveal that regular immersion using detergent significantly reduces the
formation of salt scale. The evaporator surfaces become easier to clean, the cleaning
duration is shortened, and the production of freshwater improves consistently after
treatment. Interview responses support this observation, indicating that this method not
only improves efficiency but also reduces the workload and risk of system failure.
It is concluded that detergent treatment during Fresh Water Generator (FWG) downtime
is effective in preventing crystallization and maintaining optimal operational
performance. It is recommended that this procedure be standardized as part of regular
Fresh Water Generator (FWG) maintenance practices to enhance long-term efficiency
and reliability.
