Enhancing under-rib mass transport in proton exchange membrane fuel cells using new serpentine flow field designs |
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| Affiliation: | 1. Department of Energy Resources Engineering, Egypt-Japan University of Science and Technology (E-JUST), New Borg El-Arab City, 21934, Alexandria, Egypt;2. Department of Chemical Science and Engineering, Tokyo Institute of Technology, Tokyo, 152-8552, Japan;1. Department of Mechanical Engineering, Kun Shan University, No. 949, Da Wan Rd., Yung-Kang City, Tainan Hsien 710, Taiwan, ROC;2. Department of Systems and Naval Mechatronic Engineering, National Cheng Kung University, Tainan, Taiwan, ROC;3. Advanced Technology Division, Shun On Electronic Company Limited, Hsinchu, Taiwan, ROC;1. Mechanical Engineering Department, Karadeniz Technical University, 61080, Trabzon, Turkey;2. Mechanical Engineering Department, Ömer Halisdemir University, 51240, Niğde, Turkey;3. Industrial Engineering Department, Karadeniz Technical University, 61080, Trabzon, Turkey;4. Mechanical Engineering Department, Erciyes University, 38039, Kayseri, Turkey;1. Department of Mechanical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran 15875-4413, Iran;2. Centre for Solar Energy and Hydrogen Research (ZSW), Helmholtzstr. 8, 89081 Ulm, Germany;3. Department of Chemical Engineering, Amirkabir University of Technology (Tehran Polytechnic), Tehran 15875-4413, Iran;1. Omer Halisdemir University Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, Nigde, Turkey;2. Faculty of Engineering, Omer Halisdemir University, Nigde-51240, Turkey;1. Nigde Omer Halisdemir University, Mechanical Engineering Department, 51240, Nigde, Turkey;2. Nigde Omer Halisdemir University, Prof. Dr. T. Nejat Veziroglu Clean Energy Research Center, 51245, Nigde, Turkey |
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| Abstract: | New flow field configurations are developed to improve the performance of polymer electrolyte membrane fuel cells (PEMFCs). The developed designs aim to uniformly distribute the reactants over the reaction area of the catalyst layer surface, boost the under-rib convection mass transport through the gas diffusion layer, decrease the water flooding effect in the gas diffusion layer-catalyst layer interface, and maintain the membrane water content within the required range to augment protonic conductivity. To evaluate the performance parameters of a PEMFC, a comprehensive three-dimensional, two-phase mathematical model has been developed. The model includes the charge transport, electrochemical reactions, mass conservation, momentum, energy, and water transport equations. The results signify that the improved flow field patterns attain a considerable boosting of the output power, the under-rib convection mass transport, improvement of the reactant distribution over the catalyst layer surface and decline of the liquid water saturation in the gas diffusion layer-catalyst layer interface. The developed configurations achieve a higher power density of 0.82 W/cm2 at a current density of 1.74 A/cm2, compared to the standard serpentine configuration, which attains about 0.67 W/cm2 at a current density of 1.486 A/cm2.Accordingly, the develop configurations demonstrate a 22.6% enhancement in power density. |
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| Keywords: | PEMFCs Under-rib convection Convection enhanced serpentine flow field |
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