Water Removal from Proton Exchange Membrane Fuel Cells via Electroosmotic Pumping

2019 ◽  
Vol 1 (6) ◽  
pp. 439-452 ◽  
Author(s):  
Cullen R. Buie ◽  
Jonathan Posner ◽  
Tibor Fabian ◽  
Suk-Won Cha ◽  
Daejoong Kim ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Water Removal ◽  
Electroosmotic Pumping ◽  
Exchange Membrane

Water removal characteristics of proton exchange membrane fuel cells using a dry gas purging method

2008 ◽  
Vol 180 (2) ◽  
pp. 784-790 ◽  
Author(s):  
Sang-Yeop Lee ◽  
Sang-Uk Kim ◽  
Hyoung-Juhn Kim ◽  
Jong Hyun Jang ◽  
In-Hwan Oh ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Water Removal ◽  
Gas Purging ◽  
Exchange Membrane

Experimental Investigation of the Water Impact on Performance of Proton Exchange Membrane Fuel Cells (PEMFC) With Porous and Non-Porous Flow Channels

2012 ◽  
Author(s):  
P. Karthikeyan ◽  
H. Calvin Li ◽  
G. Lipscomb ◽  
S. Neelakrishnan ◽  
J. G. Abby ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Liquid Water ◽  
Proton Exchange Membrane ◽  
Removal Rate ◽  
Gas Diffusion ◽  
Flow Channel ◽  
Proton Exchange ◽  
Water Removal ◽  
Flow Channels ◽  
Exchange Membrane

The most critical aspect of fuel cell water management is the delicate balance of membrane hydration and avoiding cathode flooding. Liquid water accumulation in the interfacial contact area between the flow channel landing and gas diffusion layer (GDL) can dramatically impact steady and transient performance of proton exchange membrane fuel cells (PEMFCs). In this concern, a porous landing could facilitate water removal in the cathode flow channel and significantly improve PEMFCs performance. In this work, an attempt has been made to fabricate the porous interdigitated cathode flow channels from a porous carbon sheet. Performance measurements have been made with nominally identical PEMFCs using non-porous (serpentine and interdigitated) and porous (interdigitated) cathode flow channels. PEMFCs with porous interdigitated flow channels had 48% greater power output than PEMFCs with non-porous interdigitated flow channels at high current densities. For the non-porous interdigitated flow channel, significant performance loss appears to arise from greatly reduced oxygen transport rates when the water generation rate exceeds the water removal rate, however for the porous interdigitated flow channel, the design removes the accumulated liquid water from the landing area through the capillarity of its porous structure and eliminates the stagnant regions under the landing, thereby reducing liquid flooding in the interface between landing and GDL area.

Water management in proton exchange membrane fuel cells using integrated electroosmotic pumping

2006 ◽  
Vol 161 (1) ◽  
pp. 191-202 ◽  
Author(s):  
Cullen R. Buie ◽  
Jonathan D. Posner ◽  
Tibor Fabian ◽  
Suk-Won Cha ◽  
Daejoong Kim ◽  
...  
Keyword(s):  
Water Management ◽  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Electroosmotic Pumping ◽  
Exchange Membrane

The Effect of Nonuniform Under-Rib Convection on Reactant and Liquid Water Distribution in Proton Exchange Membrane Fuel Cells

2015 ◽  
Vol 12 (4) ◽  
Author(s):  
P. K. Jithesh ◽  
T. Sundararajan ◽  
Sarit K. Das
Keyword(s):  
Fuel Cells ◽  
Liquid Water ◽  
Water Distribution ◽  
Proton Exchange Membrane ◽  
Proton Exchange ◽  
Water Removal ◽  
Mixed Flow ◽  
Exchange Membrane ◽  
Flow Distributor ◽  
Reactant Distribution

The performance of a proton exchange membrane (PEM) fuel cell strongly depends on the nature of reactant distribution and the effectiveness of liquid water removal. In this work, three different configurations of a mixed flow distributor are studied analytically and numerically to find out the effect of nonuniform under-rib convection on reactant and liquid water distribution in the cell. In a mixed flow distributor, the rate of under-rib convection is found to be different under each rib in the same flow sector which results in different rates of removal of liquid water. This helps to retain some water to hydrate the membrane, whereas the excess is removed to avoid flooding. It is found that under-rib convection aids to get better reactant distribution, reduces pressure drop, and provides better control over liquid water removal which is helpful in developing efficient water management strategies for PEM fuel cells.

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