Transcript Document

Single PEM Fuel Cell Assembly
Current collector
Gas diffusion layer
Gasket
MEA
Gasket
End plate
Graphite flow-channel block
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina
Schematic of water collection set up
Humidifier
Fuel Cell Tester
Thermocouple
Thermocouple
Beaker
Fuel Cell
Beaker
Ice bath
Balance
Balance
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina
Polarization curves for PEM fuel cell.
( Tcell = 70 oC, pressure(A/C) = 2/2 atm, Low stoic.)
1.0
0.9
Cell voltage (V)
0.8
0.7
T(A/C)=85/75 oC
0.6
0.5
T(A/C)=95/85 oC
0.4
0.3
0
1
2
3
4
5
6
7
8
9
10
Current (A)
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina
Humidity effects on PEM fuel cell performance
(70 oC cell temperature, P(A/C): 2/2 atm, flow rate (A/C): 76/319 cm3/min
12
10
T A/C = 85/75 o C
C u rre n t (A )
8
T A/C = 75/65 o C
T A/C = 65/55 o C
6
T A/C = 95/85 o C
4
2
0
0
10
20
30
40
50
60
Tim e (hour)
PEMFC Research
Dept. of Chemical Engineering
University of South Carolina