Process for operation of a PEM fuel cell unit

Details Process for operation of a PEM fuel cell unit Process for operation of a PEM fuel cell unit

1999-04-01

2000-08-29

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Having magnetic field feature

429 23, H01M 804

Patent

active

061106119

ABSTRACT:
A process for operating a PEM fuel cell unit containing at least one PEM fuel cell block and a speed-controlled compressor connected upstream. To control changing an electrical current I of the PEM fuel cell block to a new reference value I.sub.SN, a speed n of the compressor is set in a first step to a maximum value n.sub.M and in a second step is reduced to a speed n.sub.SN corresponding to the new reference value I.sub.SN. By this expedient improved dynamics for brief and rapid load changes are achieved.

REFERENCES:
patent: 4913983 (1990-04-01), Cheiky
patent: 5290641 (1994-03-01), Harashima
patent: 5624768 (1997-04-01), Tanokura
patent: 5877600 (1999-03-01), Sonntag
"Fuel Cell Dynamics in Transit Applications", David H. Swan et al., Dec. 12, 1994, pp. 73-80.
Japanese Patent Abstract No. 63032868 (Chifumi), dated Feb. 12, 1988.

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