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.

本数据集采集自2021年10月2日14:56至2021年10月19日14:49期间运行的闭路反渗透（closed circuit reverse osmosis, CC-RO）中试系统，每秒记录4组测量数据。闭路反渗透系统的健康状态由膜性能决定，而膜性能通过传质系数（mass transfer coefficient, MTC）进行监测。该理论上应保持恒定的系数会随浓差极化（concentration polarization）发生波动，因此需结合浓水流的电导率对传质系数开展监测。本数据集可用于验证函数数据分析（functional data analysis）技术能否识别系统故障，同时可用于测试针对不同长度函数数据的分析方法。该数据集包含一处漂移故障：2021年10月16日起，传质系数开始向更低数值漂移。数据集包含一个含3,823,017条观测记录的数据框，涵盖电导率、传质系数、观测日期时间以及当前反渗透运行周期。在本次监测时段内，共包含270个运行周期。