Maier, M;
Meyer, Q;
Majasan, J;
Tan, C;
Dedigama, I;
Robinson, J;
Dodwell, J;
... Brett, D; + view all
(2019)
Operando flow regime diagnosis using acoustic emission in a polymer electrolyte membrane water electrolyser.
Journal of Power Sources
, 424
pp. 138-149.
10.1016/j.jpowsour.2019.03.061.
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Using Acoustic Emission to Diagnose Bubble Blockage in a Proton Electrolyte Membrane Water Electrolyser.pdf - Accepted Version Download (1MB) | Preview |
Abstract
Polymer electrolyte membrane water electrolysers (PEMWE) are a key technology for producing clean (‘green’) hydrogen for decarbonisation of the transport sector and grid stabilisation utilising increasing levels of renewable energy. In this work, acoustic emission analysis is used as a non-destructive, operando diagnostic tool to provide information about the relative number and size of gas bubbles generated locally within a PEMWE, providing effective characterisation of the local flow conditions. An optically transparent single-channel PEMWE is used to investigate the relationship between the acoustic signals obtained and the two-phase flow conditions inside the cell. The number of acoustic hits, their frequency, and average peak amplitude is reported for several flow rates and current densities. Using high-speed imaging, the average bubble number and size in the flow cannels is compared to the acoustic signal. Results show good correlation between the number of acoustic ‘hits’ and the number of bubbles passing through the flow channel. The size of bubbles is also shown to affect the average frequency of the hits. Consequently, the transition between bubbly and slug flow regime can be identified by acoustic emission analysis, paving the way for a simple, low-cost, non-destructive means of mapping flow inside commercial-scale PEMWEs.
| Type: | Article |
|---|---|
| Title: | Operando flow regime diagnosis using acoustic emission in a polymer electrolyte membrane water electrolyser |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1016/j.jpowsour.2019.03.061 |
| Publisher version: | https://doi.org/10.1016/j.jpowsour.2019.03.061 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | Acoustic emission, PEM water electrolyser, Operando diagnostics, Flow regime, High-speed imaging |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10071609 |
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