Differential algebraic modeling of an alkaline electrolyzer plant

TL;DR

This paper presents a comprehensive differential algebraic model of an alkaline electrolyzer plant, enabling dynamic simulation and optimization for efficient hydrogen production under changing conditions.

Contribution

It introduces a systematic DAE-based modeling approach incorporating thermodynamics for the first time in this context.

Findings

Successful dynamic simulation with step power input

Model supports optimization and control strategies

Provides detailed component-level insights

Abstract

We develop a mathematical model for dynamic simulation of an alkaline electrolyzer plant. The plant includes the stack, a water recirculation system and hydrogen storage with compressor. We model each component of the system with mass and energy balances. Our modeling strategy consists of a rigorous and systematic formulation using differential algebraic equations (DAE), along with a thermodynamic library that evaluates thermophysical properties. We perform a simulation with step power input. Dynamic modeling enables simulation and model-based optimization and control for optimal hydrogen production under varying operating conditions.