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

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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)

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.

Suggested Citation

  • Krzysztof Górecki & Emilian Świtalski & Paweł Górecki, 2022. "Modeling the Influence of the Electrolyte Concentration on Electrical Characteristics of an Alkaline Electrolyzer," Energies, MDPI, vol. 15(21), pages 1-14, October.
    • Handle: RePEc:gam:jeners:v:15:y:2022:i:21:p:8090-:d:958896
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    References listed on IDEAS

    as
    1. Nikolaidis, Pavlos & Poullikkas, Andreas, 2017. "A comparative overview of hydrogen production processes," Renewable and Sustainable Energy Reviews, Elsevier, vol. 67(C), pages 597-611.
    2. R. D. Cortright & R. R. Davda & J. A. Dumesic, 2002. "Hydrogen from catalytic reforming of biomass-derived hydrocarbons in liquid water," Nature, Nature, vol. 418(6901), pages 964-967, August.
    3. Toghyani, S. & Afshari, E. & Baniasadi, E. & Shadloo, M.S., 2019. "Energy and exergy analyses of a nanofluid based solar cooling and hydrogen production combined system," Renewable Energy, Elsevier, vol. 141(C), pages 1013-1025.
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