modelAnCL
Anode catalyst layer
Extends from Region (Base model for a 3D array of subregions).
Information
This model represents the anode catalyst layer of a PEMFC. The x axis extends from the anode to the cathode. By default, the cross-sectional area in the yz plane is 50 cm2.
The default thickness (Lx = {28.7*U.um}) is from [Gurau1998].
The default thermal conductivity of the carbon (θ = U.m*U.K/(1.18*U.W))
represents a compressed SGL Sigracet 10 BA gas diffusion layer
[Nitta2008]. The default
electronic conductivity (σ = 40*U.S/(12*U.cm))
is for SGL Carbon Group Sigracet® 10 BA (see AnGDLs.Sigracet10BA).
Default assumptions (may be adjusted):
- All of the species have the same temperature, even in different phases.
- Half of the solid is graphite and half is ionomer (by volume).
For more information, please see the Region model.
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| Integer | n_x (from Region) | size(L_x, 1) | Number of sets of subregions along the x axis |
| Integer | n_y (from Region) | size(L_y, 1) | Number of sets of subregions along the y axis |
| Integer | n_z (from Region) | size(L_z, 1) | Number of sets of subregions along the z axis |
| Q.Length[Axis] | L (from Region) | {sum(L_x), sum(L_y), sum(L_z)} | Length |
| Q.Area[Axis] | A (from Region) | {L[cartWrap(axis + 1)]*L[cartWrap(axis + 2)] for axis in Axis} | Cross-sectional areas |
| Q.Volume | V (from Region) | product(L) | Volume |
| Q.CurrentAreic | J0 | U.A/U.cm^2 | Exchange current density @ 300 K |
| Geometry | |||
| Q.Length[:] | L_x (from Region) | {U.cm} | Lengths along the x axis |
| Q.Length[:] | L_y (from Region) | {U.cm} | Lengths along the y axis |
| Q.Length[:] | L_z (from Region) | {U.cm} | Lengths across the z axis |
| Q.NumberAbsolute | epsilon | 0.4 | Porosity |
| Assumptions › Included transport axes | |||
| Boolean | inclTransX (from Region) | true | X |
| Boolean | inclTransY (from Region) | true | Y |
| Boolean | inclTransZ (from Region) | true | Z |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| Connectors.BoundaryBus[n_y,n_z] | xNegative (from Region) | Negative boundary along the x axis | |
| Connectors.BoundaryBus[n_y,n_z] | xPositive (from Region) | Positive boundary along the x axis | |
| Connectors.BoundaryBus[n_x,n_z] | yNegative (from Region) | Negative boundary along the y axis | |
| Connectors.BoundaryBus[n_x,n_z] | yPositive (from Region) | Positive boundary along the y axis | |
| Connectors.BoundaryBus[n_x,n_y] | zNegative (from Region) | Negative boundary along the z axis | |
| Connectors.BoundaryBus[n_x,n_y] | zPositive (from Region) | Positive boundary along the z axis |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| Subregion[n_x,n_y,n_z] | subregions (from Region) | Instances of the subregion model |