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  • 1
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    Compounds in airborne particulates - Salts and hydrocarbons (1977)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Concentrations of 10 polycyclic aromatic hydrocarbons (PAH), the aliphatics as a group, sulfate, nitrate, fluoride, acidity, and carbon in the airborne particulate matter were measured at 16 sites in Cleveland, OH over a 1-year period during 1971 and 1972. Analytical methods used included gas chromatography, colorimetry, and combustion techniques. Uncertainties in the concentrations associated with the sampling procedures, and the analytical methods are evaluated. The data are discussed relative to other studies and source origins. High concentrations downwind of coke ovens for 3,4 benzopyrene are discussed. Hydrocarbon correlation studies indicated no significant relations among compounds studied.
    Keywords: ENVIRONMENT POLLUTION
    Type: Air Pollution Control Association; vol. 27
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Elemental composition of airborne particulates and source identification - An extensive one year survey (1976)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: Concentrations of 60 chemical elements in the airborne particulate matter were measured at 16 sites in Cleveland, OH over a 1 year period during 1971 and 1972 (45 to 50 sampling days). Analytical methods used included instrumental neutron activation, emission spectroscopy, and combustion techniques. Uncertainties in the concentrations associated with the sampling procedures, the analytical methods, the use of several analytical facilities, and samples with concentrations below the detection limits are evaluated in detail. The data are discussed in relation to other studies and source origins. The trace constituent concentrations as a function of wind direction are used to suggest a practical method for air pollution source identification.
    Keywords: ENVIRONMENT POLLUTION
    Type: Air Pollution Control Association; vol. 26
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Design considerations for advanced battery concepts (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A mathematical representation for the charge and discharge of a sodium-sulfur cell is developed. These equations are then used as the basis for a computerized model to examine the effects of cell arrangement in the design of a large multi-kilowatt battery from a group of hypothetical individual cells with known variations in their ampere hour capacity and internal resistance. The cycling characteristics of 216 individual cells arranged in six different configurations are evaluated with the view towards minimizing the adverse effects that are introduced due to the stochastic aspects of groupings of cells, as well as the possibility of cell failures in both the open and shorted mode. Although battery systems based on sodium-sulfur cells are described in this example, any of the newer electrochemical systems can be fitted into this framework by making appropriate modifications to the basic equations.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: AIAA PAPER 86-1164
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Acceptance tests and manufacturer relationships from the 20A h standard cell data (1981)
    In:  Other Sources
    Details
    Publication Date: 2016-06-07
    Description: Seventeen performance tests were used to classify spacecraft batteries in four standard groups established by manufacturers. Tests included capacity delivered values, end of charge voltage values, and internal shorts. Variance ratios are listed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Goddard Space Flight Center The 1980 Goddard Space Flight Center Battery Workshop; p 243-255
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Argentic oxysalt electrodes (1966)
    In:  CASI
    Details
    Publication Date: 2019-05-29
    Description: Silver ions with plus three oxidation states investigated as cathode electrodes in potassium hydroxide with zinc as anodes
    Keywords: CHEMISTRY
    Type: NASA-TN-D-3208
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Acceptance tests and manufacturer relationships for 20 amphere-hour sealed nickel-cadmium cells using discharge parameters (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: One hundred and forty-six 20 ampere-hour sealed nickel cadmium cells from five manufacturers were detected using preliminary tests which do not require life testing and do not reduce the expected life of the cells. Differences between individual cells were also detected, using these tests, allowing a comparison of variability of cell construction by and between manufacturers.
    Keywords: INORGANIC AND PHYSICAL CHEMISTRY
    Type: NASA-TM-81619 , E-625
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Synthetic battery cycling techniques (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Synthetic battery cycling makes use of the fast growing capability of computer graphics to illustrate some of the basic characteristics of operation of individual electrodes within an operating electrochemical cell. It can also simulate the operation of an entire string of cells that are used as the energy storage subsystem of a power system. The group of techniques that as a class have been referred to as Synthetic Battery Cycling is developed in part to try to bridge the gap of understanding that exists between single cell characteristics and battery system behavior.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-82945 , E-1351 , NAS 1.15:82945
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Extensive 1-year survey of trace elements and compounds in the airborne suspended particulate matter in Cleveland, Ohio (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Concentrations of 75 chemical constituents in the airborne particulate matter were measured in Cleveland, Ohio, during 1971 and 1972. Values covering a 1-year period (45 to 50 sampling days) at each of 16 sites are presented for 60 elements. A lesser number of values is given for sulfate, nitrate, fluoride, acidity, 10 polynuclear aromatic hydrocarbon compounds, and the aliphatic hydrocarbon compounds as a group. Methods used included instrumental neutron activation, emission spectroscopy, gas chromatography, combustion techniques, and colorimetry. Uncertainties in the concentrations associated with the sampling procedures, the analysis methods, the use of several analytical facilities, and samples with concentrations below the detection limits are evaluated in detail. The data is discussed in relation to other studies and source origins. The trace constituent concentrations as a function of wind direction are used to suggest a practical method for air pollution source identification.
    Keywords: ENVIRONMENT POLLUTION
    Type: NASA-TN-D-8110 , E-8173
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Screening of inorganic compounds as solvents (1967)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Screening of inorganic compounds as solvents for electrolytes in high energy density battery systems
    Keywords: AUXILIARY SYSTEMS
    Type: NASA-TM-X-1427
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Aerodynamic size distribution of suspended particulate matter in the ambient air in the city of Cleveland, Ohio (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The City of Cleveland Division of Air Pollution Control and NASA jointly investigated the chemical and physical characteristics of the suspended particulate matter in Cleveland, and as part of the program, measurements of the particle size distribution of ambient air samples at five urban locations during August and September 1972 were made using high-volume cascade impactions. The distributions were evaluated for lognormality, and the mass median diameters were compared between locations and as a function of resultant wind direction. Junge-type distributions were consistent with dirty continental aerosols. About two-thirds of the suspended particulate matter observed in Cleveland is less than 7 microns in diameter.
    Keywords: GEOPHYSICS
    Type: NASA-TM-X-3124 , E-8024
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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