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Performance assessment of a low-cost, scalable 0.5 kW alkaline zero-gap electrolyser
International Journal of Hydrogen Energy, Volume: 47, Issue: 71, Pages: 30347 - 30358
Swansea University Authors:
Bill Gannon, Max Newberry, Charlie Dunnill
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DOI (Published version): 10.1016/j.ijhydene.2022.07.040
Abstract
The performance of a six-cell zero-gap electrolyser with an active area of 300 cm2 was analysed. The device featured a new design of flowplate that employed spot-welding in order to eliminate machining costs. Direct resistance measurements were made, and computer simulations performed to confirm the...
| Published in: | International Journal of Hydrogen Energy |
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| ISSN: | 0360-3199 |
| Published: |
Elsevier BV
2022
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa60700 |
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| Abstract: |
The performance of a six-cell zero-gap electrolyser with an active area of 300 cm2 was analysed. The device featured a new design of flowplate that employed spot-welding in order to eliminate machining costs. Direct resistance measurements were made, and computer simulations performed to confirm the sub milli-ohm resistance of the flowplate design. An electrolyser test-rig was constructed to permit performance characterisation with various electrolytes and membranes at varying temperatures, and versus a comparable finite-gap design. The results were fitted to a simplified four-parameter model which permitted quantitative comparison, and performance projection up to a 100 kW device. The highest performance achieved was 84% efficiency with 6 M KOH at 65 °C and 400 mA/cm2, and the cell voltage was still below 2 V at 800 mA/cm2. The total material cost to build a 0.5 kW electrolyser is under 50 GBP (70 USD). |
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| Keywords: |
Alkaline electrolysis; Water-splitting; Zero-gap; Hydrogen |
| College: |
Faculty of Science and Engineering |
| Funders: |
This research was conducted as part of the DESIRE project, funded through the European Regional Development Fund via the Welsh Government [grant number SU213]. |
| Issue: |
71 |
| Start Page: |
30347 |
| End Page: |
30358 |