Abbreviation	Full Name	Unit
Tank	Liquid storage cavity
ACC	Anode current collector
AC	Anodic channel
AGDL	Anode gas diffusion layer
ACL	Anode catalyst layer
PEM	Proton exchange membrane
CCL	Cathode catalyst layer
CGDL	Cathode gas diffusion layer
CCC	Cathode current collector
CC	Cathode channel
$N_m$	Methanol flux	mol/(m2·s)
$C_{m,tank}$	Methanol concentration in liquid storage cavity	mol/m3
$C_{m,acc}^0$	Anode plate surface concentration	mol/m3
$C_{m,acc}$	Anode plate concentration	mol/m3
$C_{m,agdl}$	Anode diffusion layer concentration	mol/m3
$i_a$	Anode current density	A/m2
$N_{cross}$	Methanol permeation flux	mol/(m2·s)
${\eta }_a$	Anode overpotential	V
$T_{acl}$	Anode catalytic layer temperature	K
$C_{O_2,ccc}^0$	Cathode plate surface concentration	mol/m3
$C_{O_2,ccl}$	Cathode catalytic layer oxygen concentration	mol/m3
$C_{O_2,ccc}$	Cathode plate oxygen concentration	mol/m3
$C_{O_2,cgdl}$	Cathode diffusion layer oxygen concentration	mol/m3
$i_c$	Cathode current density	A/m2
$i_p$	Permeation current density	A/m2
${\eta }_c$	Cathode overpotential	V
$T_{ccl}$	Cathode catalytic layer temperature	K
$q_{acl}$	Heat produced by anode catalyst layer	W/m2
$q_{ccl}$	Heat generated by cathode catalytic layer	W/m2
$q_{tot}$	Total heat flux	W/m2
$h_{H_{2}O}$	Mass transfer coefficient of water vapor
$C_{H_{2}O,CCC}^{sat}$	Concentration of water vapor in cathode plate	mol/m3
$P_{H_{2}O}$	Saturated pressure of water in wet air	Pa