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Assessment of a NaOH-based alkaline electrolyser's performance: System modelling and operating parameters optimisation.
- Source :
-
International Journal of Hydrogen Energy . Oct2024, Vol. 85, p625-634. 10p. - Publication Year :
- 2024
-
Abstract
- Most of the scientific research is focused on KOH-based alkaline electrolysers, while NaOH-based ones are unexplored although they present interesting features. This paper presents a semi-empirical model developed in the Python environment to predict a NaOH-based alkaline electrolyser's performance to cover such a research gap and perform an optimisation procedure of electrochemical parameters. A sensitivity analysis has been carried out to study how its performance changes while varying the: i) NaOH content, ii) pressure, and iii) both. Separately, the best result has been obtained with a NaOH content and an operating pressure of 8% and 6.5 bar, respectively. Furthermore, the same values have been recorded even by varying both the NaOH content and the operating pressure. Specifically, a maximum average efficiency increase of 3.57% at 35 ° C , 0.17% at 40 ° C , and 3.74% at 35 ° C in the case of NaOH content, pressure, and both, respectively. [Display omitted] • A semi-empirical model of a NaOH-based alkaline electrolyser is developed. • Optimised electrochemical coefficients are obtained using non-linear regression. • A sensitivity analysis of a NaOH-based alkaline electrolyser is performed. • Optimal operating conditions, based on the cell temperature, are achieved. • Efficiency increase of 3.74% is obtained with NaOH content and pressure variation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03603199
- Volume :
- 85
- Database :
- Academic Search Index
- Journal :
- International Journal of Hydrogen Energy
- Publication Type :
- Academic Journal
- Accession number :
- 179464658
- Full Text :
- https://doi.org/10.1016/j.ijhydene.2024.08.175