NDLI: Experimental investigation of liquid water droplet removal in a simulated polymer electrolyte membrane fuel cell gas channel with gas diffusion layer characteristics

Content Provider	Springer Nature Link
Author	Yoon, Yeogun Jo, Yongchan Kim, Han Sang
Copyright Year	2014
Abstract	Since the accumulation of liquid water droplets in gas flow channels significantly affects the performance of polymer electrolyte membrane (PEM) fuel cells, a comprehensive understanding of liquid water removal from the cell is of great importance to achieve optimal water management. This study is mainly concerned with the ex situ measurement of water droplet growth and its removal in a non-reacting simulated cathode channel for PEM fuel cells. To this end, the dynamic behavior of a liquid water droplet at the gas flow channel/gas diffusion layer (GDL) interface was investigated experimentally using a specially designed transparent cell device with different GDLs. The effects of the GDL parameters (GDL thickness and micro-porous layer (MPL) inclusion) on water droplet removal are mainly investigated by analyzing the contact angle hysteresis with inlet air flow rate (Reynolds number). The critical Reynolds number is employed to evaluate the droplet removal from the GDL surface. It is observed that the water droplet on a thinner GDL tends to be removed under a higher critical Reynolds number. In addition, it is shown that the GDL with an MPL requires a higher critical Reynolds number for the water droplet removal under the same droplet height. The results suggest that the structure of the GDL sample has considerable influence on the water droplet removal. It is thought that the data obtained from this study can provide useful insight into the design of a GDL with enhanced water removal capability for PEM fuel cells.
Starting Page	5221
Ending Page	5230
Page Count	10
File Format	PDF
ISSN	1738494X
Journal	Journal of Mechanical Science and Technology
Volume Number	28
Issue Number	12
e-ISSN	19763824
Language	English
Publisher	Korean Society of Mechanical Engineers
Publisher Date	2014-12-12
Publisher Place	Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Contact angle hysteresis Droplet removal Flow channel Gas diffusion layer Polymer electrolyte membrane fuel cell Water management Mechanical Engineering Vibration, Dynamical Systems, Control Industrial and Production Engineering
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Mechanical Engineering

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