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Lookup NU author(s): Professor Cheng Chin
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© 2023 Elsevier LtdHigh-temperature proton exchange membrane fuel cells (HT-PEMFC) have strong resistance to CO poisoning. However, the published CO poisoning models for HT-PEMFC are based on the finite element analysis method, which are difficult to use for the performance prediction and development of system control strategies due to a large amount of calculation. In the beginning, a semi-empirical model of HT-PEMFC is deduced based on the analysis of the CO poisoning characteristics. Then the key parameters of ohmic impedance and concentration polarization advance correction factor are obtained by fitting the polarization curves, dissociation and adsorption activation energy of H2 and CO are obtained by the calculation, respectively. The slope of the straight line segment in the ohmic polarization interval of the polarization curve is linearly related to ln[H2/CO]. The change of limiting current density is the main factor for the advance of concentration polarization. The fitted ohmic impedance varies with temperature and CO concentration, but changes little above 175 °C. CO coverage depends primarily on dissociation and adsorption activation energy of CO. Subsequently, the proposed model is validated with experimental data and shows high similarity. The model can be used for studying the systematic control strategy development and performance monitoring of HT-PEMFC.
Author(s): Lei G, Zheng H, Zhang J, Chin CS, Xu X, Zhou W, Zhang C
Publication type: Article
Publication status: Published
Journal: Energy
Year: 2023
Volume: 282
Print publication date: 01/11/2023
Online publication date: 12/07/2023
Acceptance date: 30/06/2023
ISSN (print): 0360-5442
ISSN (electronic): 1873-6785
Publisher: Elsevier Ltd
URL: https://doi.org/10.1016/j.energy.2023.128305
DOI: 10.1016/j.energy.2023.128305
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