20.500.12556/RUL-126388 Predictive system-level modeling framework for transient operation and cathode platinum degradation of high temperature proton exchange membrane fuel cells High temperature proton exchange membrane fuel cells (HT-PEMFCs) are a promising and emerging technology, which enable highly efficient, low-emission, small-scale electricity and heat generation. The simultaneous reduction in production costs and prolongation of service life are considered as major challenges toward their wider market adoption, which calls for the application of predictive virtual tools during their development process. To present significant progress in the addressed area, this paper introduces an innovative real-time capable system-level modeling framework based on the following: (a) a mechanistic spatially and temporally resolved model of HT-PEMFC operation, and (b) a degradation modeling framework based on interacting individual cathode platinum degradation mechanisms. Additional innovative contributions arise from a consistent consideration of the varying particle size distribution in the transient fuel cell operating regime. The degradation modeling framework interactively considers the carbon and platinum oxidation phenomena, and platinum dissolution, redeposition, detachment, and agglomeration; hence, covering the entire causal chain of these phenomena. Presented results confirm capability of the modeling framework to accurately simulate the platinum particle size redistribution. Results clearly indicate more pronounced platinum particle growth towards the end of the channel since humidity is the main precursor of oxidation reactions. In addition, innovative modeling framework elucidate contributions of agglomeration, which is more pronounced at voltage cycling, and Ostwald ripening, which is more pronounced at higher voltages, to the platinum particles growth. These functionalities position the proposed modeling framework as a beyond state-of-the-art tool for model-supported development of the advanced clean energy conversion technologies. fuel cells proton-exchange membrane high temperature modeling platinum degradation mechanistically based gorivne celice membrane za izmenjavo protonov visoke temperature modeliranje staranje platine mehanska osnova true false true Angleški jezik Slovenski jezik Članek v reviji 2021-04-19 22:47:16 2021-04-19 22:47:25 2022-09-05 03:55:02 0000-00-00 00:00:00 2020 0 0 Str. 1-17 art. 114547 Vol. 263 2020 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2022-04-01 004.925.84(045) 0306-2619 10.1016/j.apenergy.2020.114547 17037083 5134599 RAZ_Kregar_Ambroz_2020.pdf RAZ_Kregar_Ambroz_2020.pdf 1 034EAD70FBC9E9D3C750014DD587B2B2 8df42d276d6148a4447286dabdba071f24d981d44ae1ed02f4415113e9840ef4 e62c2d9e-a1bb-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=142327 https://www.sciencedirect.com/science/article/pii/S0306261920300593 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=142326 Fakulteta za strojništvo 0 0 0