Two-dimensional modeling of a polymer electrolyte membrane fuel cell with long flow channel. Part I. Model development

被引:46
作者
Bao, Cheng [1 ,3 ]
Bessler, Wolfgang G. [2 ,3 ]
机构
[1] Univ Sci & Technol Beijing, Dept Thermal Sci & Energy Engn, Sch Mech Engn, Beijing 100083, Peoples R China
[2] Offenburg Univ Appl Sci, Inst Energy Syst Technol INES, D-77652 Offenburg, Germany
[3] German Aerosp Ctr DLR, Inst Tech Thermodynam, D-70569 Stuttgart, Germany
关键词
Polymer electrolyte membrane fuel cell (PEMFC); Phenomenological model; Oxygen reduction reaction (ORR) kinetics; Net water transport coefficient; Internal humidification; PROTON-EXCHANGE MEMBRANES; OXYGEN REDUCTION; TRANSPORT PHENOMENA; MATHEMATICAL-MODEL; WATER TRANSPORT; LIQUID WATER; ELECTROOSMOTIC DRAG; THERMAL MANAGEMENT; DIFFUSION; CATHODE;
D O I
10.1016/j.jpowsour.2014.11.058
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
A two-dimensional single-phase model is developed for the steady-state and transient analysis of polymer electrolyte membrane fuel cells (PEMFC). Based on diluted and concentrated solution theories, viscous flow is introduced into a phenomenological multi-component modeling framework in the membrane. Characteristic variables related to the water uptake are discussed. A Butler-Volmer formulation of the current-overpotential relationship is developed based on an elementary mechanism of electrochemical oxygen reduction. Validated by using published V-I experiments, the model is then used to analyze the effects of operating conditions on current output and water management, especially net water transport coefficient along the channel. For a power PEMFC, the long-channel configuration is helpful for internal humidification and anode water removal, operating in counterflow mode with proper gas flow rate and humidity. In time domain, a typical transient process with closed anode is also investigated. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码:922 / 934
页数:13
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