Abstract
In this paper, a numerical study was performed to investigate the flow distribution in a 52-cell proton exchange membrane (PEM) fuel cell stack. The non-uniformity factor and standard deviation parameters were used to determine the flow distribution uniformity. Flow channels of each bipolar plate were replaced with straight parallel channels filled with porous media to reduce computational costs. The effect of external and integrated humidifiers on the gas distribution among the channels was investigated. Using integrated humidifiers improved the non-uniformity factor and standard deviation by 35% and 19%, respectively. Two methods were employed to improve the flow distribution: gradual reduction of the manifold height, and installing a bump at the bottom wall of the inlet manifold. Reducing the height of the inlet manifold in the stack with integrated and external humidifiers decreased the non-uniformity factor by 62% and 44%, respectively. The installation of the bump on the manifold wall enhanced flow distribution in the stack with the external humidifier. The results show that by using an integrated humidifier in this method, the flow distribution became more non-uniform. The best flow distribution in the stack was obtained with an integrated humidifier and a 90% reduction in manifold height. In this case, the flow rate passing through each channel was more than 99% of the average mass flow rate passing through the entire channel.
Subject
Management, Monitoring, Policy and Law,Renewable Energy, Sustainability and the Environment,Geography, Planning and Development,Building and Construction
Reference28 articles.
1. Mench, M.M. (2008). Fuel Cell Engines, John Wiley & Sons, Inc.
2. Experimental Study of Dynamic Performance of Defective Cell within a PEMFC Stack;Yu;Int. J. Hydrogen Energy,2022
3. Flow and Pressure Distribution in Fuel Cell Manifolds;Bang;J. Fuel Cell Sci. Technol.,2010
4. Progress and Challenges on the Thermal Management of Electrochemical Energy Conversion and Storage Technologies: Fuel Cells, Electrolysers, and Supercapacitors;Rashidi;Prog. Energy Combust. Sci.,2022
5. Impacts of Reactant Flow Nonuniformity on Fuel Cell Performance and Scaling-up: Comprehensive Review, Critical Analysis and Potential Recommendations;Mortada;Int. J. Hydrogen Energy,2021
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