Performance and evaluation of bipolar fuel cell stacks / Deryn Chu [and others].

Format:

Book

Government document

Contributor:

Chu, Deryn

U.S. Army Research Laboratory

United States. Army. Communications Electronics Life Cycle Management Command

Series:

ARL-TR (Aberdeen Proving Ground, Md.) ; 2064.

ARL-TR ; 2064

Language:

English

Subjects (All):

United States. Army--Equipment--Testing.

United States.

United States. Army.

Fuel cells--Testing.

Fuel cells.

Power (Mechanics).

Armed Forces--Equipment--Testing.

Physical Description:

1 online resource (iii, 19 pages) : illustrations

Place of Publication:

Adelphi, MD : U.S. Army Research Laboratory, [2000]

Summary:

Under a joint technology planning annex (TPA) agreement, fuel cell groups at the U.S. Army Research Laboratory (ARL) and the U.S. Army Communications-Electronics Command (CECOM) worked together to develop Army power sources for soldier applications. Two 50-W bipolar fuel cell stacks designed by CECOM were extensively evaluated. The performance of the stacks depended significantly on the environmental temperature. Decreasing environmental temperature granted better heat dissipation in the stacks, resulting in improved stack performance. Long-term performance of 62 W was obtained at low temperature ( -5 deg C). Higher environmental temperatures caused an increase in stack surface temperature. When the stack surface temperature reached 43 deg C, the stack voltage dropped to zero within a short time. The maximum power density for long-term operation was 97.3 W/kg, or 167 W/L. The average hydrogen utilization efficiency was 95 percent. The water production efficiency was dependent on the discharge currents, varying from 40 percent (at 1.0 A) to 90 percent (at 2.5 A).

Notes:

Includes bibliographical references.

Title from title screen (viewed on December 28, 2010).

"February 2000."

OCLC:

227916340

Access Restriction:

Approved for public release.