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  • 1
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    A summary of the ECAS performance and cost results for MHD systems (1976)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The potential is examined of various advanced power plant concepts using coal and coal-derived fuel. The results indicate that open cycle coal fired direct preheat MHD systems have potentially one of the highest coal-pile-to-bus-bar efficiencies and also one of the lowest costs of electricity (COE) of the systems studied. Closed cycle MHD systems may have the potential to approach the efficiency and COE of open cycle MHD. The 1200-1500 F liquid metal MHD systems studied do not appear to have the potential of exceeding the efficiency or competing with the COE of advanced steam plants.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-X-71913 , Symp. on the Eng. Aspects of Magnetohydrodynamics; May 24, 1976 - May 26, 1976; Philadelphia, PA; United States
    Format: application/pdf
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  • 2
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    Effects of defect recombination centers on radiation damage in solar cells (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Defect production in silicon is modeled on a computer by solving a large system of rate equations. The model includes the main, known defects that are stable at operating temperatures of solar cells in outer space; most of these defects are secondary and tertiary defects. The preliminary result shows that the presence of defect recombination centers for primary defects (i.e., vacancy and interstitial) can effectively reduce the production rates of those stable defects and, consequentially, improve the lifetime of solar cells operating in radiation environment. The characteristics of the defect recombination center required for better solar cell performance along with prospective candidates are discussed.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Solar Cell High Efficiency and Radiation Damage; p 165-178
    Format: text
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  • 3
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    Low cost silicon solar arrays (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The economic production of silicon solar cell arrays circumvents p-n junction degradation by nuclear doping, in which the Si-30 transmutes to P-31 after thermal neutron capture. Also considered are chemical purity specifications for improved silicon bulk states, surface induced states, and surface states.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Proc. of the 1st ERDA Semiann. Solar Photovoltaic Conversion Program Conf.; p 56-103
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    NASA TECHNICAL REPORTS
  • 4
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    Estimation of outgassing from an expended apogee motor and its effects on spacecraft surfaces (1977)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An experimental and theoretical investigation was carried out to evaluate the degradation of the solar cells and other sensitive surfaces of a spacecraft, resulting from the molecular outgassing of an expended solid propellant apogee motor. The motor, following its burnout, is retained by the spacecraft and is a source of gases and particulates which will be released mainly by the unburned propellant-to-casing insulation. The deployment of the solar array within a few minutes after the motor burn results in the interception and reflection to the surfaces of the spacecraft of the molecular outgassing and particulates. Various methods, based on some experimental data, were used to analytically assess the magnitude of the outgassing from the engine.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Goddard Space Flight Center Ninth Conf. on Space Simulation; p 221-241
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  • 5
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    High-energy electron-induced damage production at room temperature in aluminum-doped silicon (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: DLTS and EPR measurements are reported on aluminum-doped silicon that was irradiated at room temperature with high-energy electrons. Comparisons are made to comparable experiments on boron-doped silicon. Many of the same defects observed in boron-doped silicon are also observed in aluminum-doped silicon, but several others were not observed, including the aluminum interstitial and aluminum-associated defects. Damage production modeling, including the dependence on aluminum concentration, is presented.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Solar Cell High Efficiency and Radiation Damage, 1979; p 185-196
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  • 6
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    Energy: An annotated selected bibliography (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This updated bibliography contains approximately 7,000 selected references on energy and energy related topics from bibliographic and other data sources from June 1977. Under each subject heading the entries are arranged by the data, with the latest works first. Subject headings include: resources supply/demand, and forecasting; policy, legislation, and regulation; environment; consumption, conservation, and economics; analysis, systems, and modeling, and information sources and documentation. Fossil fuels, hydrogen and other fuels, liquid/solid wastes and biomass, waste heat utilization, and nuclear power sources are also included.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-82364 , BIB-74-01-APP-3-VOL-1
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  • 7
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    Energy: An annotated selected bibliography (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: This updated bibliography contains approximately 7,000 selected references on energy and energy related topics from bibliographic and other data sources from June 1977. Under each subject heading the entries are arranged by the date, with the latest works first. Geothermal, solar, wind, and ocean/water power sources are included. Magnetohydrodynamics and electrohydrodynamics, electric power engineering, automotive power plants, and energy storage are also covered.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-82365 , BIB-74-01-APP-3-VOL-2
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  • 8
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    The status of defect studies pertinent to radiation damage in silicon solar cells (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The status of radiation defects in silicon is briefly reviewed and discussed in relation to the problem of radiation tolerance of silicon solar cells in space.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Solar Cell High Efficiency and Radiation Damage; p 159-164
    Format: text
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  • 9
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    Phase 2 of the array automated assembly task for the low cost solar array project (1979)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The process sequence for the fabrication of dendritic web silicon into solar panels was modified to include aluminum back surface field formation. Plasma etching was found to be a feasible technique for pre-diffusion cleaning of the web. Several contacting systems were studied. The total plated Pd-Ni system was not compatible with the process sequence; however, the evaporated TiPd-electroplated Cu system was shown stable under life testing. Ultrasonic bonding parameters were determined for various interconnect and contact metals but the yield of the process was not sufficiently high to use for module fabrication at this time. Over 400 solar cells were fabricated according to the modified sequence. No sub-process incompatibility was seen. These cells were used to fabricate four demonstration modules. A cost analysis of the modified process sequence resulted in a selling price of $0.75/peak watt.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-162628 , DOE/JPL-954873-79/08
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  • 10
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    Coal desulfurization by low temperature chlorinolysis, phase 1 (1977)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The reported activity covers laboratory scale experiments on twelve bituminous, sub-bituminous and lignite coals, and preliminary design and specifications for bench-scale and mini-pilot plant equipment.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-157172 , JPL-PUB-78-8
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