TY - JOUR
T1 - Effective permeability of gas diffusion layer in proton exchange membrane fuel cells
AU - Shou, Dahua
AU - Tang, Youhong
AU - Ye, Lin
AU - Fan, Jintu
AU - Ding, Feng
PY - 2013/8/21
Y1 - 2013/8/21
N2 - In gas diffusion layers (GDLs) of proton exchange membrane fuel cells (PEMFCs), effective permeability is a key parameter to be determined and engineered. In this study, through-plane (TP) and in-plane (IP) flow behaviors of GDLs are investigated analytically based on a scaling estimate method. The TP permeability and IP permeability of unidirectional fibers are determined first, based on that the minimum distance and the inscribed radius between fibers are adopted as the characteristic lengths for normal and parallel flows, respectively. The permeabilities of two-dimensional (2D) and three-dimensional (3D) GDLs are estimated by a proper mixture of the local TP and IP permeabilities of fiber alignments. Themechanisticmodel agrees closely with experimental and numerical results over a wide porosity range. With the new model, the influences of porosity and fiber orientation on flow behaviors are analyzed.
AB - In gas diffusion layers (GDLs) of proton exchange membrane fuel cells (PEMFCs), effective permeability is a key parameter to be determined and engineered. In this study, through-plane (TP) and in-plane (IP) flow behaviors of GDLs are investigated analytically based on a scaling estimate method. The TP permeability and IP permeability of unidirectional fibers are determined first, based on that the minimum distance and the inscribed radius between fibers are adopted as the characteristic lengths for normal and parallel flows, respectively. The permeabilities of two-dimensional (2D) and three-dimensional (3D) GDLs are estimated by a proper mixture of the local TP and IP permeabilities of fiber alignments. Themechanisticmodel agrees closely with experimental and numerical results over a wide porosity range. With the new model, the influences of porosity and fiber orientation on flow behaviors are analyzed.
KW - Analytical model
KW - Gas diffusion layers
KW - In-plane permeability
KW - Through-plane permeability
UR - http://www.scopus.com/inward/record.url?scp=84883135639&partnerID=8YFLogxK
U2 - 10.1016/j.ijhydene.2013.06.043
DO - 10.1016/j.ijhydene.2013.06.043
M3 - Article
SN - 0360-3199
VL - 38
SP - 10519
EP - 10526
JO - International Journal of Hydrogen Energy
JF - International Journal of Hydrogen Energy
IS - 25
ER -