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, Inc. (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


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    Titel :

    A Fuel Cell Energy Storage System Concept for the Space Station Freedom Extravehicular Mobility Unit


    Weitere Titelangaben:

    Sae Technical Papers


    Beteiligte:

    Kongress:

    Intersociety Conference on Environmental Systems ; 1989



    Erscheinungsdatum :

    1989-07-01




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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