IJE TRANSACTIONS B: Applications Vol. 31, No. 5 (May 2018) 812-819    Article in Press

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E. Afshari, S. P. Hosseini and M. Mosharaf-Dehkordi
( Received: August 01, 2017 – Accepted in Revised Form: February 25, 2018 )

Abstract    The performance of proton-exchange membrane fuel cell cooling system using coolant flow channels enhanced with baffles was numerically investigated. To do this, the maximum temperature of the cooling plate, temperature uniformity and also pressure drop along the flow channels were compared for different cases associated with number of baffles and their dimensions inside the channels. The governing equations by the finite-volume approach in three dimensions were solved. Numerical results indicate that the baffle-restricted cooling flow channels, generally improved the performance of the fuel cell in such a way that a reduced maximum temperature of the cell and a better temperature uniformity in the cooling plates were determined. As the pressure drop increases by incorporating the baffles inside the coolant flow channels, one needs to compromise between the improvement of cooling system performance and the total pressure drop.


Keywords    Proton-exchange Membrane Fuel Cell; Cooling Flow Field; Baffle; Temperature Uniformity; SurfaceTemperature; Pressure Drop


چکیده    در این مقاله عملکرد حرارتی و خنک کاری پیل سوختی غشا پلیمری با قرار دادن موانع در کانال­های خنک­کاری بررسی شده است. بدین منظور، فاکتورهای ماکزیمم دمای صفحه خنک کاری، شاخص یکنواختی دمای سطح خنک‌کاری و همچنین افت فشار در داخل کانال­ها بدون مانع و با نصب مانع بررسی و مقایسه شده است. معادلات حاکم در داخل کانال­های پیل به روش عددی و به کمک روش حجم محدود با مدل­سازی سه بعدی صفحات خنک­کاری حل شده­اند. نتایج عددی نشان می­دهند که در پیل با کانال­های همراه با مانع نسبت به کانال­های بدون مانع، عملکرد حرارتی پیل بهبود یافته است؛ به طوری که ماکزیمم دمای سطح صفحات خنک کاری کاهش یافته و شاخص یکنواختی دما نیز بهبود می­یابد. افت فشار نیز هر چند با قرار دادن مانع داخل کانال­ها افزایش می­یابد؛ اما باید مصالحه­ای بین بهبود شاخص­های دمایی و افزایش افت فشار انجام شود.


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