Experimental and numerical studies of micro PEM fuel cell |
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Authors: | Rong-Gui Peng Chen-Chung Chung Chiun-Hsun Chen |
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Institution: | (1) Department of Mechanical and Electro-Mechanical Engineering, National Sun Yat-Sen University, Kaohsiung, Taiwan, ROC |
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Abstract: | A single micro proton exchange membrane fuel cell (PEMFC) has been produced using Micro-electromechanical systems (MEMS) technology
with the active area of 2.5 cm2 and channel depth of about 500 μm. A theoretical analysis is performed in this study for a novel MEMS-based design of amicro
PEMFC. Themodel consists of the conservation equations of mass, momentum, species and electric current in a fully integrated
finite-volume solver using the CFD-ACE+ commercial code. The polarization curves of simulation are well correlated with experimental
data. Three-dimensional simulations are carried out to treat prediction and analysis of micro PEMFC temperature, current density
and water distributions in two different fuel flow rates (15 cm3/min and 40 cm3/min). Simulation results show that temperature distribution within the micro PEMFC is affected by water distribution in the
membrane and indicate that low and uniform temperature distribution in the membrane at low fuel flow rates leads to increased
membrane water distribution and obtains superior micro PEMFC current density distribution under 0.4V operating voltage. Model
predictions are well within those known for experimental mechanism phenomena. |
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Keywords: | Micro PEMFC · MEMS · Simulation · Fuel flow rate |
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