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Localization of a continuous CO2 leak from an isotropic flat-surface structure using acoustic emission detection and near-field beamforming techniques

Yan, Yong, Cui, Xiwang, Guo, Miao, Han, Xiaojuan (2016) Localization of a continuous CO2 leak from an isotropic flat-surface structure using acoustic emission detection and near-field beamforming techniques. Measurement Science and Technology, 27 (11). ISSN 0957-0233. (doi:10.1088/0957-0233/27/11/115105)

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http://dx.doi.org/10.1088/0957-0233/27/11/115105

Abstract

Seal capacity is of great importance for the safety operation of pressurized vessels. It is crucial to locate the leak hole timely and accurately for reasons of safety and maintenance. This paper presents the principle and application of a linear acoustic emission sensor array and a near-field beamforming technique to identify the location of a continuous CO2 leak from an isotropic flat-surface structure on a pressurized vessel in the Carbon Capture and Storage system. Acoustic signals generated by the leak hole are collected using a linear high-frequency sensor array. Time-frequency analysis and a narrow-band filtering technique are deployed to extract effective information about the leak. The impacts of various factors on the performance of the localization technique are simulated, compared and discussed, including the number of sensors, distance between the leak hole and sensor array and spacing between adjacent sensors. Experiments were carried out on a laboratory-scale test rig to assess the effectiveness and operability of the proposed method. The results obtained suggest that the proposed method is capable of providing accurate and reliable localization of a continuous CO2 leak.

Item Type: Article
DOI/Identification number: 10.1088/0957-0233/27/11/115105
Uncontrolled keywords: CO2 leak; Leak localization; Acoustic emission; Sensor array; Near-field beamforming
Subjects: T Technology
Divisions: Faculties > Sciences > School of Engineering and Digital Arts > Instrumentation, Control and Embedded Systems
Depositing User: Tina Thompson
Date Deposited: 27 Sep 2016 08:45 UTC
Last Modified: 09 Jul 2019 11:54 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/57524 (The current URI for this page, for reference purposes)
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