کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7730883 | 1497939 | 2015 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of cross-flow on PEFC liquid-water distribution: An in-situ high-resolution neutron radiography study
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
الکتروشیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of cross-flow on PEFC liquid-water distribution: An in-situ high-resolution neutron radiography study Effect of cross-flow on PEFC liquid-water distribution: An in-situ high-resolution neutron radiography study](/preview/png/7730883.png)
چکیده انگلیسی
Liquid-water management in polymer-electrolyte fuel cells (PEFCs) remains an area of ongoing research. To enhance water removal, certain flow-fields induce cross-flow, or flow through the gas-diffusion layer (GDL) via channel-to-channel pressure differences. While beneficial to water removal, cross-flow comes at the cost of higher pumping pressures and may lead to membrane dehydration and other deleterious issues. This paper examines the impact of cross-flow on component saturation levels as determined through in-plane high-resolution neutron radiography. Various humidities and operating conditions are examined, and the results demonstrate that cell saturation levels correlate strongly with the level of cross-flow rate, and lower GDL saturation levels are found to correlate with an increase in permeability at higher flow rates. Effective water removal is found to occur at channel-to-channel pressure gradients greater than the measured breakthrough pressure of the GDL, evidence that similar liquid-water transport mechanisms exist for under-land area transport as in transverse GDL flow.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Power Sources - Volume 293, 20 October 2015, Pages 162-169
Journal: Journal of Power Sources - Volume 293, 20 October 2015, Pages 162-169
نویسندگان
Anthony D. Santamaria, Maxwell K. Becton, Nathanial J. Cooper, Adam Z. Weber, Jae Wan Park,