How are preventive maintenance schedules determined for critical WEC components?

Preventive maintenance (PM) schedules for critical Wave Energy Converter (WEC) components are determined through a combination of factors, including manufacturer recommendations, operational experience, and condition monitoring data. First, the manufacturer provides recommended maintenance intervals for various components based on their design life, operating conditions, and historical failure data. These recommendations serve as a starting point for the PM schedule. Second, operational experience gained from monitoring the performance of WECs in the field provides valuable information about the actual failure rates and degradation patterns of components. This data can be used to adjust the PM intervals to better reflect the real-world operating conditions. For example, if a particular component is found to fail more frequently than predicted by the manufacturer, the PM interval may be shortened. Third, condition monitoring data, obtained from sensors and inspections, provides real-time information about the health of the components. Techniques such as vibration analysis, oil analysis, and thermography can detect early signs of wear or damage, allowing for proactive maintenance interventions. Condition-based maintenance (CBM) uses this data to trigger maintenance tasks only when they are actually needed, rather than at fixed intervals. The PM schedule is continuously reviewed and updated based on the feedback from operational experience and condition monitoring data. Reliability-centered maintenance (RCM) is a systematic approach that combines these factors to develop an optimized PM schedule that minimizes downtime and maximizes the lifespan of the WEC.