Page 161 - Introduction to Transfer Phenomena in PEM Fuel Cells

150 Introduction to Transfer Phenomena in PEM Fuel Cells
Constants C1 and C2 are determined from the boundary conditions
presented in Table 4.2. The thermal resistances are grouped in Table 4.3.
Interfaces Boundary conditions
=
() =
x0 T0 T
C
=
xL TL ) = T GDL,C
1
( 1
(
=
xL TL 2 ) = T BP,C
2
=
xL TL ) = T BP,A
( 3
3
(
=
xL TL 4 ) = T GDL,A
4
=
xL TL ) = T
( 5
5
A
(
=
xL TL 6 ) = T
6
m
=
xL TL ) = T
C
( 7
7
Table 4.2. Boundary conditions of the model
Elements Expressions
Membrane (m) R m = e m λ m
Anode R A = e A λ A
Diffusion Layer GDL R GDL = e GDL λ GDL
Bipolar Plate BP R BP = e BP λ BP

Region (1) R = R m + R A + R GDL + R BP
1
Region (2) R = R GDL + R BP
2

Table 4.3. Thermal resistances of different elements of the model