Speakers
Description
The unmanned platforms offer substantial cost savings, increased operational flexibility, and enhanced safety measures, making them an attractive option for offshore industry. However, the maintenance of unmanned platform is planned to be based on fixed time intervals, e.g. 6 to 12 months, which brings a challenge to ensure the availability with such long maintenance intervals. This study aims to solve reliability system configuration with variable repair time model and estimate the availability and maintenance manning workload for different redundancy configurations (2, 3,4 and 5 equipment) for unmanned assets. The availability figures for the 12 months maintenance interval with several redundancy scenarios ranges from 26.50% to 87.50% for 2 to 5 equipment. However, for 6 months maintenance interval, the availability figures ranges from 67.00%, 98.10%, 99.50% to 99.70% for 2, 3, 4 and 5 pumps respectively. and these values were up to the availability of the baseline (99.00%). The applied redundancy with fixed maintenance intervals has reduced the number of maintenance visits from 188 to 20 (for 12 months maintenance interval) over 20 years lifetime and from 188 to 40(for 6 months maintenance interval) over 20 years lifetime. This reduction has a cascaded effects on CO2 emission and OPEX.
Keywords: Fixed Maintenance Interval, Variable Repair Time, Simulation Modelling, Agent based Modelling, System Availability, Unmanned Assets.
