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  • 1
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    Advanced technology for extended endurance alkaline fuel cells (1987)
    In:  Other Sources
    Details
    Publication Date: 2011-08-19
    Description: Advanced components have been developed for alkaline fuel cells with a view to the satisfaction of NASA Space Station design requirements for extended endurance. The components include a platinum-on-carbon catalyst anode, a potassium titanate-bonded electrolyte matrix, a lightweight graphite electrolyte reservoir plate, a gold-plated nickel-perforated foil electrode substrate, a polyphenylene sulfide cell edge frame material, and a nonmagnesium cooler concept. When incorporated into the alkaline fuel cell unit, these components are expected to yield regenerative operation in a low earth orbit Space Station with a design life greater than 5 years.
    Keywords: ENERGY PRODUCTION AND CONVERSION
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    NASA TECHNICAL REPORTS
  • 2
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    Trace elements by instrumental neutron activation analysis for pollution monitoring (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Methods and technology were developed to analyze 1000 samples/yr of coal and other pollution-related samples. The complete trace element analysis of 20-24 samples/wk averaged 3-3.5 man-hours/sample. The computerized data reduction scheme could identify and report data on as many as 56 elements. In addition to coal, samples of fly ash, bottom ash, crude oil, fuel oil, residual oil, gasoline, jet fuel, kerosene, filtered air particulates, ore, stack scrubber water, clam tissue, crab shells, river sediment and water, and corn were analyzed. Precision of the method was plus or minus 25% based on all elements reported in coal and other sample matrices. Overall accuracy was estimated at 50%.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
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    NASA TECHNICAL REPORTS
  • 3
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    A simple method for determination of fission gases trapped in irradiated fuel forms (1970)
    In:  Other Sources
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    Publication Date: 2011-08-16
    Description: Fission gases trapped in fuel particles, cladding and matrix of irradiated refractory metal-uranium oxide cermets determined by gamma counting
    Keywords: NUCLEAR ENGINEERING
    Type: ; 459 (
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    NASA TECHNICAL REPORTS
  • 4
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    Control of volume resistivity in inorganic-organic separators (1980)
    In:  Other Sources
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    Publication Date: 2011-08-18
    Description: Control of resistivity in NASA inorganic-organic separators is achieved by incorporating small percentages of high surface area, fine-particle silica with other ingredients in the separator coating. The volume resistivity appears to be predictable from coating composition, that is, from the surface area of filler particles in the coating. The approach has been applied to two polymer-'plasticizer'-filler coating systems, where the filler content of each is below the generally acknowledged critical pigment volume concentration of the coating. Application of these coating systems to 0.0254 cm thick (10 mil) fuel-cell grade asbestos sheet produces inexpensive, flexible, microporous separators that perform at least as well as the original inorganic-organic concept, the Astropower separator.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Electrochemical Society; vol. 127
    Format: text
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  • 5
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    Estimate of contribution of jet aircraft operations to trace element concentration at or near airports (1975)
    In:  Other Sources
    Details
    Publication Date: 2011-08-16
    Description: Samples of ASTM type A jet fuel were analyzed for trace element content by instrumental neutron activation techniques. Forty-nine elements were sought. Only ten, aluminum, gold, indium, lanthanum, titanium, vanadium, barium, dysprosium, tellurium, and uranium, were observed at levels above the detection limits encountered; of these only aluminum, titanium, and barium were present at concentrations greater than 0.1 ppm. Estimates of exhaust gas concentrations are made, and the ambient contribution at or near airports is calculated by using the Los Angeles International Airport dispersion model. It is shown that the ambient contribution is about an order of magnitude below typical urban levels for virtually all elements sought.
    Keywords: ENVIRONMENT POLLUTION
    Type: Air Pollution Control Association; vol. 25
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  • 6
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    Regenerative fuel cell systems for space station (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Regenerative fuel cell (RFC) systems are the leading energy storage candidates for Space Station. Key design features are the advanced state of technology readiness and high degree of system level design flexibility. Technology readiness was demonstrated through testing at the single cell, cell stack, mechanical ancillary component, subsystem, and breadboard levels. Design flexibility characteristics include independent sizing of power and energy storage portions of the system, integration of common reactants with other space station systems, and a wide range of various maintenance approaches. The design features led to selection of a RFC system as the sole electrochemical energy storage technology option for the space station advanced development program.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA. Goddard Space Flight Center The 1984 Goddard Space Flight Center Battery Workshop; p 21-29
    Format: application/pdf
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  • 7
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    Regenerative Hydrogen-oxygen Fuel Cell-electrolyzer Systems for Orbital Energy Storage (1984)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Fuel cells have found application in space since Gemini. Over the years technology advances have been factored into the mainstream hardware programs. Performance levels and service lives have been gradually improving. More recently, the storage application for fuel cell-electrolyzer combinations are receiving considerable emphasis. The regenerative system application described here is part of a NASA Fuel Cell Program which was developed to advance the fuel cell and electrolyzer technology required to satisfy the identified power generation and energy storage need of the Agency for space transportation and orbital applications to the year 2000.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Type: NASA. Goddard Space Flight Center The 1983 Goddard Space Flight Center Battery Workshop; p 23-42
    Format: application/pdf
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  • 8
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    The use of super 184 W as a thermal flux monitor at high temperatures. (1969)
    In:  Other Sources
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    Publication Date: 2011-08-12
    Description: Thermal neutron capture cross section at high temperature irradiations determined for W 184, describing radiochemical separation and flux counting techniques
    Keywords: INSTRUMENTATION AND PHOTOGRAPHY
    Type: ; ST. OF RADIO AND ELE
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  • 9
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    Inexpensive cross-linked polymeric separators made from water-soluble polymers (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Polyvinyl alcohol (PVA), cross-linked chemically with aldehyde reagents, produces membranes which demonstrate oxidation resistance, dimensional stability, low ionic resistivity (less than 0.8 Ohms sq cm), low zincate diffusivity (less than 1 x 10 to the -7th mols/sq cm per min), and low zinc dendrite penetration rate (greater than 350 min) which make them suitable for use as alkaline battery separators. They are intrinsically low in cost, and environmental health and safety problems associated with commercial production appear minimal. Preparation, property measurements, and cell test results in Ni/Zn and Ag/Zn cells are described and discussed.
    Keywords: CHEMISTRY AND MATERIALS (GENERAL)
    Type: Electrochemical Society; vol. 129
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  • 10
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    Alkaline battery containing a separator of a cross-linked copolymer of vinyl alcohol and unsaturated carboxylic acid (1985)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A battery separator for an alkaline battery is described. The separator comprises a cross linked copolymer of vinyl alcohol units and unsaturated carboxylic acid units. The cross linked copolymer is insoluble in water, has excellent zincate diffusion and oxygen gas barrier properties and a low electrical resistivity. Cross linking with a polyaldehyde cross linking agent is preferred.
    Keywords: ELECTRONICS AND ELECTRICAL ENGINEERING
    Format: application/pdf
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