Mass transfer in proton exchange membrane fuel cells with baffled flow channels and a porous‐blocked baffled flow channel design

2019 ◽  
Vol 43 (7) ◽  
pp. 2910-2929 ◽  
Author(s):  
Hao Chen ◽  
Hang Guo ◽  
Fang Ye ◽  
Chong Fang Ma ◽  
Qiang Liao ◽  
...  
Keyword(s):  
Mass Transfer ◽  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Flow Channel ◽  
Proton Exchange ◽  
Channel Design ◽  
Flow Channels ◽  
Exchange Membrane

Performance of Proton Exchange Membrane Fuel Cells with Honeycomb-like Flow Channel Design

Energy ◽  
2021 ◽  
pp. 122102
Author(s):  
Shuanyang Zhang ◽  
Shun Liu ◽  
Hongtao Xu ◽  
Gaojie Liu ◽  
Ke Wang
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Flow Channel ◽  
Proton Exchange ◽  
Channel Design ◽  
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.

Flow channel design for metallic bipolar plates in proton exchange membrane fuel cells: Experiments

2018 ◽  
Vol 174 ◽  
pp. 814-823 ◽  
Author(s):  
Diankai Qiu ◽  
Linfa Peng ◽  
Peiyun Yi ◽  
Xinmin Lai ◽  
Werner Lehnert
Keyword(s):  
Fuel Cells ◽  
Proton Exchange Membrane ◽  
Flow Channel ◽  
Proton Exchange ◽  
Bipolar Plates ◽  
Channel Design ◽  
Metallic Bipolar Plates ◽  
Exchange Membrane

Improved Thermal Uniformity by Introducing Tree-Like Flowing Channels in a PEMFC Flow-Field Plate

2017 ◽  
Author(s):  
Yuxin Jia ◽  
Rui Zhu ◽  
Bengt Sunden ◽  
Gongnan Xie
Keyword(s):  
Fuel Cells ◽  
Flow Field ◽  
Proton Exchange Membrane ◽  
Numerical Study ◽  
Flow Characteristics ◽  
Flow Channel ◽  
Proton Exchange ◽  
Field Plate ◽  
Flow Channels ◽  
Exchange Membrane

Thermal uniformity in the flow field plate of proton exchange membrane fuel cells (PEMFCs) is crucial for their power generating efficiency and reliability and therefore, has attracted much attention. The present numerical study is an attempt to optimize the flow channels via replacement of convectional zigzag continuous channels by tree-like bifurcated channels radially outwards. The numerical model is validated by experimental data available in the open literature. The effects of included angles and length ratios among the channels on thermal uniformity are analyzed based on detailed fluid flow characteristics. Results show that tree-like channels outperform conventional ones. It is found that tree-like flow channels can improve thermal uniformity of proton exchange membrane fuel cells. Within limits, with smaller angle between bifurcated flow channels and length ratio 2−1/3 between higher flow channel and lower flow channel, PEMFC can obtain the most uniform temperature distribution in Y shape tree-liked flow field.

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