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PEM Fuel cell Stacks EcoFC ™

H
2 ECOnomy’s EcoFC™ series PEM fuel cell stacks are designed for demonstration and study of fuel cell operation. Data Sheet Parameters by model
Model (No. of cells is indicated by the last digit) Nominal Power Approximate Dimensions Recommended gas pressures Recommended gas flow rates (w/o bolts, fittings, and current collectors) (bar, gauge) (SLPM) H 2 O 2 H 2 O 2 EcoFC-1 3.5 W @ 0.6 V 9 x 9 x 3 cm 1.0 1.2 0.04 0.06 EcoFC-2 7 W @ 1.2 V 9 x 9 x 3.5 cm 1.0 1.2 0.085 0.13 EcoFC-3 10 W @ 1.8 V 9 x 9 x 4 cm 1.0 1.2 0.13 0.18 EcoFC-4 13 W @ 2.4 V 9 x 9 x 4.5 cm 1.2 1.4 0.17 0.23 EcoFC-5 16 W @ 3.0 V 9 x 9 x 5 cm 1.2 1.4 0.2 0.28 EcoFC-6 19 W@ 3.6 V 9 x 9 x 5.5 cm 1.4 1.5 0.25 0.33 General operational parameters and conditions Maximum output voltage (w/o load) 0.9 V per cell

*

Maximum gas pressures (each channel) 2 bar (gauge) Allowable pressure difference between the two channels 0.2 bar

**

Acceptable ambient temperature 0 to +50 C Stack working temperature 50-70 C Stack maximal temperature Up to 80 C Fuel / Oxidant Hydrogen / Oxygen Optimal working conditions for achieving nominal output. 99.99% (or more) purity of H
2 and O
2 , 100% humidity of gases

***

* It is strongly recommended to keep the loaded voltage higher than 0.5V on each cell. ** O 2 pressure must always be 0.1-0.4 higher than H 2 pressure, and the flow rate of O 2 must be greater than 100 ml/min. *** Operation at lower temperatures, lower humidity of gases or with air instead of oxygen is also possible, although with loss of performance.