A Fuel Cell Energy Storage System Concept for the Space Station Freedom Extravehicular Mobility Unit Ergenics Power Systems, Incorporated

Format:

Conference/Event

Author/Creator:

Adlhart, Otto J., author.

Conference Name:

Intersociety Conference on Environmental Systems (1989-07-24 : San Diego, California, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1989

Summary:

The paper gives an update on an advanced development effort carried out under NASA Johnson Space Center (NASA/JSC) NAS 9-17775 by Ergenics Power Systems, Incorporated (EPSI). The work was initiated in April 1987 to design and build a Fuel Cell Energy Storage System (FCESS) bench-test unit for the Space Station Freedom Extravehicular Mobility Unit (EMU). Fueled by oxygen and hydride stored hydrogen, the FCESS is being considered as an alternative to the EMU zinc-silver oxide battery. Superior cycle life and quick recharge are its main attributes. Design and performance of a non-venting 28V, 34 Ahr system with 7 amp rating are discussed. The FCESS is comprised of a 32-cell proton exchange membrane (PEM) stack, a metal hydride storage vessel and a control subsystem. The stack design incorporates passive product-water removal and thermal integration with the hydride vessel. The hydride vessel stores enough fuel for 5 hours. The control subsystem provides reactant pressure and flow regulation, automatic startup, shutdown and electronic protection against malfunctioning

Notes:

Vendor supplied data

Publisher Number:

891582

Access Restriction:

Restricted for use by site license