Convegni ATI - Accesso riservato soci CTI

Autore: B. Tysoe, J.G. Pharoah

Collana: BT - 34 - Mag 06 - Energy: production, distribution and conservation

Note:
A technique is presented here of measuring the in-plane permeability of a PEM fuel cell PTL at different compressive states. The technique utilizes a combination of numerical and experimental work. The result is a range of values that is a function of the value of through-plane permeability used in the numerical model. When the manufacturer’s specified through-plane permeability is used the in-plane permeability values are narrowed down to a very tight range.
The PTL is measured at two compressive states and the results show that the in-plane permeability decreases for increased PTL compression. This is what one would expect given the densification of the porous media.
It is shown that the in-plane permeability is higher than the through-plane value by up to a factor of eight. This is in contrast to the isotropic conditions that are assumed throughout PEM fuel cell modelling.