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  • ENERGY PRODUCTION AND CONVERSION  (374)
  • 1975-1979  (354)
  • 1970-1974  (20)
  • 1
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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
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Chemical vapor deposition growth (1978)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The objective was to investigate and develop chemical vapor deposition (CVD) techniques for the growth of large areas of Si sheet on inexpensive substrate materials, with resulting sheet properties suitable for fabricating solar cells that would meet the technical goals of the Low Cost Silicon Solar Array Project. The program involved six main technical tasks: (1) modification and test of an existing vertical-chamber CVD reactor system; (2) identification and/or development of suitable inexpensive substrate materials; (3) experimental investigation of CVD process parameters using various candidate substrate materials; (4) preparation of Si sheet samples for various special studies, including solar cell fabrication; (5) evaluation of the properties of the Si sheet material produced by the CVD process; and (6) fabrication and evaluation of experimental solar cell structures, using impurity diffusion and other standard and near-standard processing techniques supplemented late in the program by the in situ CVD growth of n(+)/p/p(+) sheet structures subsequently processed into experimental cells.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-158031 , DOE/JPL-954372-78/6 , C76-320/501
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Ternary compound thin film solar cells (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: A group of ternary compound semiconductor (I-III-VI2) thin films for future applications in photovoltaic devices is proposed. The consideration of these materials (CuInSe2, CuInTe2 and especially CuInS2) for long range device development is emphasized. Much of the activity to date has been concerned with the growth and properties of CuInX2 films. X-ray and electron diffraction analyses, Hall mobility and coefficient, resistivity and carrier concentration variations with substrate and film temperature as well as grain size data have been determined. Both p- and n-type films of CuInS2 and CuInSe2 have been produced. Single and double source deposition techniques have been utilized. Some data have been recorded for annealed films.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: JPL Proc. of the 1st ERDA Semiann. Solar Photovoltaic Conversion Program Conf.; p 678-695
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    NASA TECHNICAL REPORTS
  • 4
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    Photovoltaic system (1975)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The evaluation methodology is outlined for conceptual design and systems analysis on photovoltaic solar energy cells to provide electric power supplies in terrestrial applications at economic costs.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Proc. of the 1st ERDA Semiann. Solar Photovoltaic Conversion Program Conf.; p 24-55
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    NASA TECHNICAL REPORTS
  • 5
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    Design, fabrication, and test of a steel spar wind turbine blade (1979)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The design and fabrication of wind turbine blades based on 60 foot steel spars are discussed. Performance and blade load information is given and compared to analytical prediction. In addition, performance is compared to that of the original MOD-O aluminum blades. Costs for building the two blades are given, and a projection is made for the cost in mass production. Design improvements to reduce weight and improve fatigue life are suggested.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Large Wind Turbine Design Characteristics and R and D Requirements; p 267-284
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    NASA TECHNICAL REPORTS
  • 6
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    A Conceptual Design Study on the Application of Liquid Metal Heat Transfer Technology to the Solar Thermal Power Plant (1979)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Alkali metal heat transfer technology was used in the development of conceptual designs for the transport and storage of sensible and latent heat thermal energy in distributed concentrator, solar Stirling power conversion systems at a power level of 15 kWe per unit. Both liquid metal pumped loop and heat pipe thermal transport were considered; system configurations included: (1) an integrated, focal mounted sodium heat pipe solar receiver (HPSR) with latent heat thermal energy storage; (2) a liquid sodium pumped loop with the latent heat storage, Stirling engine-generator, pump and valves located on the back side of the concentrator; and (3) similar pumped loops serving several concentrators with more centralized power conversion and storage. The focus mounted HPSR was most efficient, lightest and lowest in estimated cost. Design confirmation testing indicated satisfactory performance at all angles of inclination of the primary heat pipes to be used in the solar receiver.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-162544 , DOE/JPL-1060-28 , GEAEP-54
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Greenbelt Community Project: Solar energy retrofit for a multi-family dwelling (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A cooperative project was initiated between Goddard Space Flight Center and the nearby community of Greenbelt, Maryland. The purpose was to design, install and operate an experimental solar heating system on a group of four tandem town houses. The system was successfully developed and is operating. A description is given of the design, installation, system operation and performance as well as the important considerations for judging the economic feasibility of solar heating systems.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-79612
    Format: application/pdf
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  • 8
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    Photovoltaic refrigeration application: Assessment of the near-term market (1977)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: This foreign and domestic market assessment was performed as part of the Tests and Applications Project being conducted by NASA-LeRC as part of the Department of Energy's (DOE) National Photovoltaic Program. One of the objectives of that program was to stimulate the demand for photovoltaic power systems so that appropriate markets would be developed in concert with the increasing photovoltaic production capacity. The refrigeration application represented a possible market for photovoltaics; hence, a brief survey of potential applications was conducted. Both refrigerators and refrigeration systems were considered in the assessment although the primary emphasis is on refrigerators of 9 cu ft of less. Three user sectors were examined: (1) government, (2) commercial/institutional, and (3) general public.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73876 , E-9476 , DOE/NASA/1022-77/23
    Format: application/pdf
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  • 9
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    Photovoltaic village power application: Assessment of the near-term market (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The village power application represents a potential market for photovoltaics. The price of energy for photovoltaic systems was compared to that of utility line extensions and diesel generators. The potential domestic demand was defined in both the government and commercial sectors. The foreign demand and sources of funding for village power systems in the developing countries were also discussed briefly. It was concluded that a near term domestic market of at least 12 MW min and a foreign market of about 10 GW exists.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-73893 , DOE/NASA/1022-78/25 , E-9510
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Molten Salt Thermal Energy Storage Systems (1978)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The feasibility of storing thermal energy at temperatures of 450 C to 535 C in the form of latent heat of fusion was examined for over 30 inorganic salts and salt mixtures. Alkali carbonate mixtures were chosen as phase-change storage materials in this temperature range because of their relatively high storage capacity and thermal conductivity, moderate cost, low volumetric expansion upon melting, low corrosivity, and good chemical stability. Means of improving heat conduction through the solid salt were explored.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-135419 , COO-2888-3
    Format: application/pdf
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