Modeling an Electrolyzer in a Graph-Based Framework

Buu- Van Nguyen (), Johan Romate and Cornelis Vuik
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Buu- Van Nguyen: Delft Institute of Applied Mathematcis, Delft University of Technology, Mekelweg 4, 2628CD Delft, The Netherlands
Johan Romate: Delft Institute of Applied Mathematcis, Delft University of Technology, Mekelweg 4, 2628CD Delft, The Netherlands
Cornelis Vuik: Delft Institute of Applied Mathematcis, Delft University of Technology, Mekelweg 4, 2628CD Delft, The Netherlands

Energies, 2025, vol. 18, issue 3, 1-16

Abstract: We propose a linear electrolyzer model for steady-state load flow analysis of multi-carrier energy networks, where the electrolyzer is capable of producing hydrogen gas and heat. For our electrolyzer model, we show that there are boundary conditions that lead to a well-posed problem. We derive these conditions for two cases, namely with a known and unknown heat efficiency parameter. Furthermore, the derived conditions are validated numerically. Moreover, we investigate the extensibility of our model by including nonlinear models from electricity, gas, and heat. In this setting, we derived boundary conditions based on our previous findings. Due to the involvement of nonlinearity, it is a challenge to prove that the boundary conditions lead to a well-posed problem. Therefore, we simulated the electrolyzer connected with an electricity, gas, and heat system. Additionally, we considered a known and unknown heat efficiency parameter. The numerical results support that the linear electrolyzer model is solvable in a multi-carrier energy network.

Keywords: electrolyzer; integrated energy system; steady-state load flow analysis (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: 2025
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