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Transient Characteristics of Fuel Cell Stack at Continuous Current Discharge  

Park, Chang Kwon (Grad. School of Chonnam National University)
Jeong, Kwi Seong (Grad. School of Chonnam National University)
Oh, Byeong Soo (Department of Mechanical Engineering, Chonnam National University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.14, no.3, 2003 , pp. 195-206 More about this Journal
Abstract
Polymer electrolyte membrane fuel cells(PEMFC) are very interesting power source due to high power density, simple construction and operation at low temperature. But they have problems such as high cost, improvement of performance and effect of temperature. This problems can be approached using mathematical models which are useful tools for analysis and optimization of fuel cell performance and for heat and water management, in this paper, transient model consists of various energy terms associated with fuel cell operation using the mass and energy balance equation. And water transfer in the membrane is composed of back diffusion and electro-osmotic drag. The temperature calculated by transient model approximately agreed with the temperature measured by experiment in constant current condition.
Keywords
Electro-osmotic; Back diffusion; density; osmotic;
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