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Performance assessment of a low-cost, scalable 0.5 kW alkaline zero-gap electrolyser

Bill Gannon, Max Newberry, Charlie Dunnill Orcid Logo

International Journal of Hydrogen Energy, Volume: 47, Issue: 71, Pages: 30347 - 30358

Swansea University Authors: Bill Gannon, Max Newberry, Charlie Dunnill Orcid Logo

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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...

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Published in: International Journal of Hydrogen Energy
ISSN: 0360-3199
Published: Elsevier BV 2022
Online Access: Check full text

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).
Keywords: Alkaline electrolysis; Water-splitting; Zero-gap; Hydrogen
College: College of 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