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SUPPORTING TECHNOLOGY Slgnificant progress was made at the component, subsystem, and system levels. Feasiblllty of Redox system operation with a photovoltaic array was demonstrated. Membrane resistivity and selectivity were shown to be adequate for solar and stand-alone applicatlons. Membrane reslstivity was reduced from 7.0 n-cm2 (Sept. 1978) to the present level of 3.6 n-cm2• A fuller understanding of the iron-fouling problem was achieved, and membranes with more stable resistlvitles were developed. Electrode technology improved signif1cantly. Present laboratory cells have reached 20 000 cycles w1th a performance loss of less than 5 percent. Slngle-cell performance continues to lmpro~e. Present cells have achieved a current density of 43 A/ft2 (30 Alft 1n Sept. 1978) at 0.9 V and 50 percent depth of d1scharge (DOD). Testing of cells 1n short (five cell) stacks Y1elded watt-hour, round- trip eff1c1enc1es of 81 percent at 20 A/ft2, coulombic effic1encies of 98 percent, and peak power of 60 W/ft2• PROJECT ELEMENT SUMMARIES ELEMENT 1.0 - PROJECT MANAGEMENT Background Element 1.0 lncludes the necessary coordlnat10n, planning, and prepara- tlon assoc1ated with program reV1ews, workshops, multiyear plans, and annual operatlng plans for the project activlt1es. Also included are the necessary management to implement the proJect and control of resources to ensure mile- stone achlevement. Approach Primary results of program plann1ng and management are contained in three documents: (1) the 1nteragency agreement (IA); (2) the annual opera- ting plan (AOP); and (3) monthly management informat1on and control system (MICS) reports. Project status is reported 1n detail through perlodic reviews held with DOE, SNLA, and NASA managements. An AOP is prepared each year that responds to the resource gU1delines provided by DOE Headquarters through the lead center (SNLA) to the Redox project manager. The AOP details the speciflc tasks to be performed along with the required resources. Re- views, workshops, and briefings are planned and 1mplemented as required to support the proJect goals. Figure 3 displays the major milestones associated with thlS act1vity. 4PDF Image | NASA Redox Storage System Development Project 1980
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