CCRO Functional Fault Detection Study

A dataset from a closed circuit reverse osmosis (CC-RO) pilot system from October 2, 2021 at 2:56 PM to October 19, 2021 at 2:49 PM with four measurements recorded every second. The CC-RO system health is determined by membrane performance, which is monitored via the mass transfer coefficient (MTC). This should remain constant over time but can vary with concentration polarization, so MTC is monitored with respect to the conductivity of the reject stream. This dataset may be used to determine if functional data analysis techniques can be used to identify faults, and can be used to test methods for functional data of varying lengths. The dataset contains a drift fault where the MTC started to drift to lower values, beginning on October 16, 2021. This dataset contains a data frame consisting of 3,823,017 observations that includes the conductivity, MTC, date and time of the observation, and current RO cycle. Within this time frame, there are 270 cycles.