Condition monitoring systems

The gas turbine is a complex system. A typical control system with hierarchic levels of automation is shown in Figure 19-3. The control system at the plant level consists of a D-CS system, which in many new installations is connected to a condition monitoring system and an optimization system. The D-CS system is what is considered to be a plant level system and is connected to the three machine level systems. It can, in some cases, also be connected to functional level systems such as lubrication systems and fuel handling systems. In those cases, it would give a signal of readiness from those systems to the machine level systems. The condition monitoring system... 

Implementation of advanced performance degradation models, necessitate the inclusion of advanced instrumentation and sensors such as pyrometers for monitoring hot section components, dynamic pressure transducers for detection of surge and other flow instabilities such as combustion especially in the new dry low NO combustors. To fully round out a condition monitoring system the use of expert systems in determining fault and life cycle of various components is a necessity. 

Figure 19-8. A block diagram for an on-line condition monitoring system.

Figure 21-1. Total performance-based condition monitoring system.

Safety features (e.g. operation in explosive environments, alarm and condition-monitoring systems). 

UEDA, M., et al.. Condition Monitoring System of Rotating Machines in the Experimental Fast Reactor JOYO, Proc. 3 JSME/ASME Joint Int. Conf on Nuclear Engineering (ICONE-3) Kyoto, Japan, 23-27 April 1995, Vol. 3, ASME (1995) pp. 1619-1621. 

Preventive Maintenance measures, inspection plans, integrated condition monitoring systems and the availability of service and spare parts at any time over the entire lifetime ensure reliability of an electrolysis system. 

We collected the data directly from the running chiller by a condition monitoring system, in order to build the belief network. 

Our approach is quite different from the one shown in many articles in the current literature. We did not recover failure rates from historical data and then we tried to forecast the system expected reliability and its behavior. On the contrary, we collected the data directly fiwm the running chiller by a condition monitoring system, in order to build the belief network. 

The approach refers mainly to information that is obtained from manually recorded failures in the maintenance system. In the future, the manual registration may be partly replaced by information from other systems, such as automatic shutdown re-cording systems, condition monitoring systems, and diagnostic systems. 

Stress and condition monitoring system All types of steam cycles and major components Actual on-line stresses, temperatures, and other conditions used to determine damaging conditions and residual life... 

Machine condition monitoring system These systems collect information via vibration sensors, to analyse bearings, and drive components. Advanced systems... 

Process condition monitoring system (sometimes also called technological monitoring system) These systems collect information from QCS sensors, vibration sensors, pressure sensors, triggers at rolls and fabrics, etc. to analyse the reasons for periodic quahty disturbances. AU collected signals are taken simultaneously with sample rates from 100 Hz to 4 kHz, depending on sensor type and application. The required measurement frequency is given by the revolution time of the machine elements which can cause quality variations, like felts, rolls, pumps, etc. 

The correlation results are calculated using time synchronous averaging. A process condition monitoring system can e. g. detect whether an applicator roll is responsible for periodic coat weight deviations, or whether a moisture variation is correlated with the revolution time of a press felt. 

Barring monitoring system This system identifies calender rolls which cause barring. Technically it works similarly to a process condition monitoring system. 

Preventive maintenance actions to prevent failure of wind farm components scheduled by wind farm operator using information obtained from inspections, SCADA and condition monitoring system ... 

Inputs inspection and maintenance results, SCADA, condition monitoring system and climate data ... 

The indicator model is obtaining direct and indirect information from inspection and maintenance results, condition monitoring systems and SCADA to update continuously the deterioration model of the components. 

Nilsson, J., Bertling, L., 2007. Maintenance management of wind power systems using Condition Monitoring Systems. IEEE, pp. 1-1. doi 10.1109/PES.2007.385616. 

Van Horenbeek, A., Van Ostaeyen, J., Duflou, J.R. Pintelon, L. (2013). Quantifying the added value of an imperfectly performing condition monitoring system—Application to a wind turbine gearbox Reliability Engineering System Safety, 111 45-57. 

Option 2—Condition-based maintenance (CM+CBM) In addition to option 1, also measures depending on the detectable state (i.e. by a condition monitoring system) are carried out... 

Condition monitoring system scenario— preventive maintenance optimization... 

The interest of using Condition monitoring systems in order to detect as early as possible the degradation process has been highlighted, and was proven to be worth the investment. Moreover, the use of failure distributions extracted from on-site measurements has been proven to be profitable for optimization of preventive replacements. 

Another plant increased the availability of ECCS system by installing the test lines for the check valves. Another plant embarked on the use of condition monitoring system to determine a real need for maintenance activities, thus reducing the maintenance related imavailability. 

Tasbaz et al [1] have investigated the use of electrostatic sensors for early detection of scuffing in oil lubricated metal/metal contacts. Electrostatic events were detected prior to severe scuffing and this work demonstrated the potential of using electrostatic detection technology as an on-line machinery condition monitoring system. 

Condition Monitoring (CM) Condition-Moniloring Syslem(s) (CMS) Engine Condition Monitoring (ECM) Engine Condition-Monitoring System(s) (ECMS)... 

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