Vibration- and pressure signals as sources of information for an on-line vibration monitoring system in PWR power plants

The vibration can influence the running of devices in the engine room. It is necessary to monitor the vibration state of all running machineries. Through integrating the Bluetooth technology into the common vibration sensor, a wireless on-line vibration monitoring system is designed to monitor all devices. It will be helpful to avoid severe failure and improve the cruising ability.

Download Full-text

Design of On-Line Monitoring System for Grid-Connected Photovoltaic Power Plants

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.303-306.431 ◽

2013 ◽

Vol 303-306 ◽

pp. 431-434 ◽

Cited By ~ 1

Author(s):

Xin Jing Zou ◽

Li Bian ◽

Yong Hui Zhai

Keyword(s):

Data Collection ◽

Monitoring System ◽

Virtual Instrument ◽

Power Plants ◽

Meteorological Data ◽

Ambient Air ◽

Qinghai Province ◽

On Line ◽

Photovoltaic Plant ◽

Photovoltaic Plants

This paper describes the design of an on-line monitoring system for grid-connected photovoltaic plants. The proposed system consists of a meteorological data collection system for measuring meteorological parameters (e.g. irradiance, ambient air temperature, etc.), a set of data collection boxes for measuring electrical parameters (e.g. DC and AC current, DC and AC voltage, DC and AC power, etc.) and a PC. The collected data have been transmitted to the PC by two methods, wired transmission and wireless transmission. The software of the on-line monitoring system based on LabVIEW (Laboratory Virtual Instrument Engineering Workbench) package is used to process, display and store the collected data in the PC disk. The on-line monitoring system was installed in a grid-connected photovoltaic plant for an on-site measurement in Qinghai province in China. The obtained results demonstrate that it has the ability for data collecting, processing and analyzing and it meets the measurement requirements of grid-connected PV plants

Download Full-text

A Method for Monitoring Vibrational Fatigue of Structure and Components

Journal of Pressure Vessel Technology ◽

10.1115/1.4053380 ◽

2021 ◽

Author(s):

Nadim Moussallam ◽

Rainer Ziegler ◽

Rudolph Juergen ◽

Steffen Bergholz

Keyword(s):

Monitoring System ◽

Nuclear Power ◽

Power Plants ◽

Vibration Monitoring ◽

Stress History ◽

Industrial Structures ◽

Digital Twins ◽

Fatigue Monitoring ◽

Vibration Fatigue ◽

Rainflow Counting

Abstract A vibration fatigue monitoring system has been developed by Framatome to assess, in real time, the evolution of industrial structures, systems and components lifetime expectancy. Its originality comes from the fact that only one or a few acceleration measurements are necessary to re-construct the complete stress history in the whole structure, including on welds or bolted connections that could not have been directly instrumented. From this stress history, a fatigue analysis with a rainflow counting algorithm is conducted and the cumulative usage factor of each weld or bolt is determined. The remaining life duration is then estimated. The method has been numerically and experimentally validated in that sense that the reconstructed stress histories were successfully compared to direct stress calculations and measurements. The system was then installed on five industrial structures submitted to transient dynamic excitations. It is expected that it will soon find further applications notably in monitoring vibrations induced during power plants transients that may induce some temporary resonance of piping equipment. Finally, the vibration monitoring system can also be combined with a thermal fatigue monitoring system, many of which are already deployed, at least on nuclear power plants, and the reconstructed stresses might include both thermal and mechanical effects. Installing such a fatigue monitoring on a set of sensitive systems and components could be a valuable brick in the present trend of building digital twins of power plants or other industrial structures.

Download Full-text

Effect of Shot Peening on the Surface Oxidation of P92 Steel in the Steam Environment at 600°C

Journal of Pressure Vessel Technology ◽

10.1115/1.4053379 ◽

2021 ◽

Author(s):

Yuhui Huang ◽

Fu-Zhen Xuan

Keyword(s):

Monitoring System ◽

Nuclear Power ◽

Power Plants ◽

Surface Oxidation ◽

Vibration Monitoring ◽

Stress History ◽

P92 Steel ◽

Industrial Structures ◽

Fatigue Monitoring ◽

Vibration Fatigue

Abstract A vibration fatigue monitoring system has been developed by Framatome to assess, in real time, the evolution of industrial structures, systems and components lifetime expectancy. Its originality comes from the fact that only one or a few acceleration measurements are necessary to re-construct the complete stress history in the whole structure, including on welds or bolted connections that could not have been directly instrumented. From this stress history, a fatigue analysis with a rainflow counting algorithm is conducted and the cumulative usage factor of each weld or bolt is determined. The remaining life duration is then estimated. The method has been numerically and experimentally validated in that sense that the reconstructed stress histories were successfully compared to direct stress calculations and measurements. The system was then installed on five industrial structures submitted to transient dynamic excitations. It is expected that it will soon find further applications notably in monitoring vibrations induced during power plants transients that may induce some temporary resonance of piping equipment. Finally, the vibration monitoring system can also be combined with a thermal fatigue monitoring system, many of which are already deployed, at least on nuclear power plants, and the reconstructed stresses might include both thermal and mechanical effects. Installing such a fatigue monitoring on a set of sensitive systems and components could be a valuable brick in the present trend of building digital twins of power plants or other industrial structures.

Download Full-text

Performance Monitoring Systems for Power Plants: General Features and Application Models

2002 International Joint Power Generation Conference ◽

10.1115/ijpgc2002-26074 ◽

2002 ◽

Author(s):

M. Gambini ◽

M. Vellini

Keyword(s):

Monitoring System ◽

Heat Recovery ◽

Power Plants ◽

Performance Monitoring ◽

Measured Data ◽

Diagnostic Information ◽

Monitoring Systems ◽

Heat Recovery Steam Generator ◽

On Line ◽

Plant Components

The general features and benefits of a performance monitoring system (PMS) and its capabilities on plant auditing and management are illustrated. The criteria for the validation and reconciliation of the measured data are tackled and the energetic diagnosis of components, by means the comparison between current performance and expected one, is shown. A “on line–real time” monitoring system evaluates the current performance of the power plant immediately and realistically, as well as it informs the operator of problems as soon as they occur and provides diagnostic information so that the operator can remedy the problem. After generals about PMS, two application models are shown: the first one deals with the reconciliation of measured data and it has been numerically developed with reference to a heat recovery steam generator; the second one deals with the energetic diagnosis of plant components and it has been developed with reference to a steam condenser.

Download Full-text

Pattern recognition based on-line vibration monitoring system for fault diagnosis of automobile gearbox

Measurement ◽

10.1016/j.measurement.2017.09.041 ◽

2018 ◽

Vol 114 ◽

pp. 233-242 ◽

Cited By ~ 19

Author(s):

T. Praveenkumar ◽

B. Sabhrish ◽

M. Saimurugan ◽

K.I. Ramachandran

Keyword(s):

Pattern Recognition ◽

Fault Diagnosis ◽

Monitoring System ◽

Vibration Monitoring ◽

On Line

Download Full-text

On-Line Monitoring System for Main Steam Piping of Power Plants

Volume 5: High Pressure Technology; Nondestructive Evaluation Division; Student Paper Competition ◽

10.1115/pvp2009-77976 ◽

2009 ◽

Author(s):

Ning Wang ◽

Zhengdong Wang ◽

Yingqi Chen

Keyword(s):

Power Plant ◽

Monitoring System ◽

Remote Monitoring ◽

Power Plants ◽

Residual Life ◽

Thermal Power ◽

Creep Damage ◽

Piping System ◽

On Line ◽

Main Steam

An on-line life prediction system is developed for remote monitoring of material aging in a main steam piping system. The stress analysis of piping system is performed by using the finite element method. A sensor network is established in the monitoring system. The creep damage is evaluated from strain gages and a relationship is given based on a database between the damage and residual life. Web technologies are used for remote monitoring to predict the residual life for every part of the piping system. This system is useful for safety assessment procedures in thermal power plant, nuclear power plant and petrochemical industries.

Download Full-text