Page 166 - Introduction to Transfer Phenomena in PEM Fuel Cells

List of Symbols

Nomenclature

Symbol Meaning Unit
a Water activity –
2
A Surface area [cm ]
Empirical coefficient [V]
A ac
–2
b Empirical coefficient [A.cm ]
–3
c Molar concentration [mol. m ]
–1
–1
C p Heat capacity [J. kg .K ]
–1
D Diffusion coefficient [m².s ]
E Reversible voltage [V]
–1
EW Equivalent weight [g.mol ]
–1
F Faraday constant [C. mol ]
–1
–2
h Convection coefficient [W.m .K ]
J Current [A]
–2
j Current density [A.cm ]
–2
j 0 Exchange current density [A.cm ]
–1
–1
k Heat conductivity [W.m .K ]
L Length [µm]
m Empirical coefficient [V]