Abstract
The main objective of this paper is to develop a dynamic emulator of a proton exchange membrane (PEM) electrolyzer (EL) through an equivalent electrical model. Experimental investigations have highlighted the capacitive effect of EL when subjecting to dynamic current profiles, which so far has not been reported in the literature. Thanks to a thorough experimental study, the electrical domain of a PEM EL composed of 3 cells has been modeled under dynamic operating conditions. The dynamic emulator is based on an equivalent electrical scheme that takes into consideration the dynamic behavior of the EL in cases of sudden variation in the supply current. The model parameters were identified for a suitable current interval to consider them as constant and then tested with experimental data. The obtained results through the developed dynamic emulator have demonstrated its ability to accurately replicate the dynamic behavior of a PEM EL.
Highlights
Over the last years, fossil fuel reserves have significantly decreased due to growing demand.fossil fuels are widely used in transportation, industrial and electric power sectors [1].As a result, intensive use of fossil fuels has had negative impacts and is the main source of air pollution and the primary emitter of carbon dioxide and others greenhouse gas [2,3]
In [13], an electrical circuit to represent the dynamic behavior is proposed; this circuit is similar to the one proposed in our paper, but it considers only one time constant. These papers have confirmed their hypotheses, while the present paper aims at obtaining an equivalent circuit of the proton exchange membrane (PEM) EL to emulate during hydrogen production
In the subsequent static test and dynamic test, the behavior of the PEM EL when soliciting by step currents, has been reproduced are performed
Summary
Fossil fuels are widely used in transportation, industrial and electric power sectors [1]. Intensive use of fossil fuels has had negative impacts and is the main source of air pollution and the primary emitter of carbon dioxide and others greenhouse gas [2,3]. Given that the transportation sector is one the most significant emitters of greenhouse gases, new energy fuel must be developed with the aim to minimize the environmental impact from global warming and meteorological phenomena. Some automotive manufacturers (e.g., Toyota, Honda, and Hyundai) have been interested in hydrogen, with an aim to develop fuel cell electric vehicle prototypes [4,5]. Compared to conventional vehicles that burn fossil fuels, hydrogen combustion only releases water
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