Air channel inlet velocity, uair (m s-1)

0 3

Fuel channel outlet pressure,  p0  ( Pa) 105

Air channel outlet pressure,  p0  ( Pa) 105

Fuel channel inlet temperature, Tinlet (K) 973。15

Air channel inlet temperature, Tinlet (K) 973。15

Inlet concentration (mol m-3)

c0

H2 12。147

c0

H2O  0。376

c0

O2 2。63

c0

N2 9。893

Tortuosity factor,  3。5

Porosity,  0。3

Porous radius, rg (m) 5e-7

Activation energies for the cathode, E (J mol-1 )

O2 130×103

ca ca

Reaction symmetric factor for cathode, f  , r 0。75, 0。5

Exchange transfer current density of cathode,  ica   Am-1 

ref 4000

Exchange transfer current density of anode, ian  A m-1 

ref 5000

Activation energies for the anode, E (J mol-1 )

H2 120×103

Reaction symmetric factor for anode, an , an

f r 1, 0。5

Operation voltage, op    (V) 0。7

Thermal conductivity of anode,  (W m-2 s-1)

an 2 [36]

Thermal conductivity of electrolyte,  (W m-2 s-1)

elec 2 [36]

Thermal conductivity of cathode,  (W m-2 s-1)

ca 4 [36]

Thermal conductivity of rib,  (W m-2 s-1)

rib 6 [37]

Area specific contact resistance at the rib-electrode interface,

ASR (Ω cm2)

contact 0。03

Channel length, Lch  (mm) 20

Channel width, wch  (mm) 1。5

Interconnect height, hint  (mm) 2。0

Rib width, wrib  (mm) 1。5

Rib height, hrib  (mm) 1。0

Table 2。 Coefficients of molar heat capacity [38]

Gases a1

i a2 103

i a3 106

i

Hydrogen 29。09 0。836 -0。3265

Water 30 10。7 -2。022

Oxygen 36。16 0。845 -0。7494