NASA Redox Storage System Development Project

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NASA Redox Storage System Development Project ( nasa-redox-storage-system-development-project )

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/Depth-of-:ircharqe ........ ........... TABLE I.-REDUCTIONOF SHUNT-CURRENTLOSS (TAPER CURRENT) BY CELL DESIGN CHAKGES: FIVE-CELL STACKS, 1.20 V/CELL Configuration --- Original Bipolar-plate manifold holes insulated irm fluids 'Membrane manifold holes insulated from fluids Membranes insulated from fluids i n port slots Mathematical model TABLE II. - NOMINAL DESIGN SPECIFICATIONS FOR NASA LEUIS PREPROTOTYPE 1-kW REDOX STORAGE SYSTEM range (utflization). percent Reactant Reactant energy dens'ty (end of 1ife), Whlliter volume (each), l i t e r s (U.S. gallons) - 2000 - .............................. 1260 Nominal net power, W ...........................1000 ............................. ......................... 700 (186) Voltage, V dc .............................. /~urrberof stacks 4 1Number of cells per stack Number of trim packages (six cells each) .................. 39 ............. ........................... 14.5 32-a- Cell active area, c d ...................... j~ominalcurrent density. mAlcd 30 ]Reactants ......................... 1MFeCl3, 2NHC1 1MCrC17. 2NHC1 ............; /Parasitic losses, W: .................... I I~eactantflow rates (nominal), cm3/min cell 100-150 I Pumps (efficiency, percent) 120 (1--5-) ( .............................. Shunt power Number of rebalance cells Number o f charge-indicator c e l l s ......................... ...................... ' Taper current, 7 PP 10 80 -X (0.M) 120+5

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