Modeling the Influence of the Electrolyte Concentration on Electrical Characteristics of an Alkaline Electrolyzer

Krzysztof Górecki (), Emilian Świtalski and Paweł Górecki
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Krzysztof Górecki: Department of Marine Electronics, Gdynia Maritime University, 81-225 Gdynia, Poland
Emilian Świtalski: Department of Marine Electronics, Gdynia Maritime University, 81-225 Gdynia, Poland
Paweł Górecki: Department of Marine Electronics, Gdynia Maritime University, 81-225 Gdynia, Poland

Energies, 2022, vol. 15, issue 21, 1-14

Abstract: This paper presents the results of investigations into modeling the DC and dynamic characteristics of an alkaline electrolyzer. A model of the device under consideration is proposed in the form of analytical relationships in which the coefficients depend on the concentration of the potassium hydroxide solution contained in the electrolyzer under consideration. The correctness of the proposed model is verified by comparing the calculated and measured current–voltage characteristics and the dependence of the module of the impedance of the electrolyzer on the frequency obtained at different values of the electrolyte concentration. The dependence of the time needed to produce a given portion of hydrogen on the supply current and the electrolyte concentration is also presented. Good compliance with the calculation and measurement results is obtained over a wide range of voltage and current, frequency, and concentration of the electrolyte.

Keywords: alkaline electrolyzer; modelling; SPICE; DC characteristics; AC characteristics; measurements; hydrogen (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2022
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