Computation of Thermal Conductivity of Gas Diffusion Layers of PEM Fuel Cells

A comparative investigation into the influence of the constitutive model on the prediction of in-plane formability for Nakazima and Marciniak tests

“…The bulk electrical conductivities of the solid and fluid phases were fixed to 𝜎 gdl solid = 10 5 S m −1 and 𝜎 gdl fluid = 10 −16 S m −1 , respectively, while the bulk thermal conductivity of the solid phase was set to 𝑘 gdl solid = 70 W m −1 K −1 . These values are comparable to those considered by other authors[57][58][59]76,78,[81][82][83][84][85][86], and are equal to those used to scale the normalized effective properties computed with the LBM. The thermal conductivity of the gas phase was internally determined in ANSYS® Fluent according to the composition of the gas mixture (see Supplementary Material).…”

Analysis of representative elementary volume and through-plane regional characteristics of carbon-fiber papers: diffusivity, permeability and electrical/thermal conductivity

“…[31, [76][77][78][79][80][81][82][83][84][85]. Note that an exact determination of the bulk properties of the solid K -1 phase is challenged by the possible anisotropy of carbon fibers, as well as the differences 15 that may exist between fibers and binder [80,82].…”

Review of operating condition, design parameters and material properties for proton exchange membrane fuel cells

“…3D X‐ray computed tomography (CT) was used to investigate three GDLs and the thermal conductivity of components were assessed. Results by Pfrang et al 56 showed that the average thermal through‐plane conductivity was about 4 to 12 times lesser than the average thermal in‐plane conductivity, when the macroscopic and anisotropic effective thermal conductivity was measured. It was also revealed that the thermal conductivity at the macro‐level was significantly affected by the contact area between the spatial distribution of PTFE and carbon fibres.…”