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http://dx.doi.org/10.5229/JKES.2007.10.4.245

Friction Factor in Micro Channel Flow with Electrochemical Reactions in Fuel Cell  

Cho, Son-Ah (Dept. of mechanical Engineering, University of Incheon)
Lee, Pil-Hyong (Dept. of mechanical Engineering, University of Incheon)
Han, Sang-Seok (Dept. of mechanical Engineering, University of Incheon)
Choi, Seong-Hun (INNOFLOW)
Hwang, Sang-Soon (Dept. of Mechanical Engineering, University of Incheon)
Publication Information
Journal of the Korean Electrochemical Society / v.10, no.4, 2007 , pp. 245-251 More about this Journal
Abstract
The performance of fuel cell is enhanced with increasing reaction surface. Narrow flow channels in flow plate cause increased pumping power. Therefore it is very important to consider the pressure drops in the flow channel of fuel cell. Previous research for pressure drop for micro channel of fuel cell was focused on effects of various configuration of flow channel without electrochemical reaction. It is very important to know pressure loss of micro flow channel with electrochemical reaction because fluid density in micro channel is changed due to chemical reaction. In this paper, it is investigated that the pressure drops in micro channel of various geometries at anode and cathode with electrochemical reaction and compared them to friction coefficient (fRe), velocity, pressure losses for corresponding non reacting flow channel. The results show that friction factors for cold flow channel could be used for parallel and bended flow channel for flow channel design of fuel cell. In the other hand, pressure drop for serpentine flow channel is the lowest among flow channels due to bypass flow across gas diffusion layer under reacting flow condition although its pressure drop is highest for cold flow condition.
Keywords
Friction factor; PEMFC; Electrochemical reaction; Bypass flow; Serpentine flow;
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