Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
4994737 | International Journal of Heat and Mass Transfer | 2017 | 6 Pages |
Abstract
Bruggeman correlation with exponents of m = n = 1.5 (parameters relevant to tortuosity factor) has been extensively applied in the modeling of PEM fuel cells, however, many studies indicated that the usage of m = n = 1.5 will overestimate the gaseous effective diffusion coefficients in the porous mediums of a fuel cell, it is believed that m and n may fall in between 2.0 and 5.0, but with different values. This paper attempts to investigate the sensitivity of the gaseous diffusion to the various reported values of m and n by a three-dimensional two-phase fuel cell model to answer how much difference they will make in predicting cell performance. The numerical results demonstrate that the cell performance varies considerably with the variation of m and n, and the sensitivity of cell performance to m and n in cathode side and anode side, in GDL and CL can be of great distinction.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Fluid Flow and Transfer Processes
Authors
Yulin Wang, Shixue Wang,