Development of On-Line Monitoring Systems for High Temperature Components in Power Plants

Sensors

Hongcai Zhang¹  Jiuhong Jia¹  Ning Wang¹  Xiaoyin Hu¹  Shan-Tung Tu¹  Shaoping Zhou¹ 

[1] Key Laboratory of Pressure Systems and Safety, Ministry of Education, East China University of Science and Technology, Shanghai 200237, China; E-Mails:

关键词: on-line monitoring system;    strain;    extensometer;    high temperature;    accuracy;   

DOI  :  10.3390/s131115504

来源: mdpi

【 摘 要 】

To accurately detect deformation and extend the component life beyond the original design limits, structural safety monitoring techniques have attracted considerable attention in the power and process industries for decades. In this paper an on-line monitoring system for high temperature pipes in a power plant is developed. The extension-based sensing devices are amounted on straight pipes, T-Joints and elbows of a main steam pipeline. During on-site monitoring for more than two years, most of the sensors worked reliably and steadily. However, the direct strain gauge could not work for long periods because of the high temperature environment. Moreover, it is found that the installation and connection of the extensometers can have a significant influence on the measurement results. The on-line monitoring system has a good alarming function which is demonstrated by detecting a steam leakage of the header.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland.