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  • 1
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    A unifying study of tandem-junction, front-surface-field, and interdigitated-back-contact solar cells (1980)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Solid-State Electronics; 23; Nov. 198
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Late biological effects of heavy charged particles: Cataracts, vascular injury and life shortening in mice (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Risks associated with extended habitation in a space environment, particularly hazards to space workers that might result from exposure to high energy heavy ion particles (HZE), were studied. Biological effects of HZE were investigated in mice to assess their potential adverse health hazards. The potential effects of HZE particles on the crystalline lens of the eye and the carcinogenic effects and blood vessel (vascular) damage from radiation were evaluated by a risk assessment. Animal experiments to evaluate dose response relationships for tumor induction/promotion and for vascular injury were introduced. Cataract productions and preliminary results on cacinogenic and vascular effects are presented for perspective.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Washington The Final Proc. of the Solar Power Satellite Program Rev.; p 477-479
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Experimental evaluation of thermal energy storage (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The technical performance of commercially available thermal energy storage (TES) residential heating units under severe weather conditions is discussed. The benefits and costs of TES to the user and utility companies were assessed. The TES issues, research and development needs, and barriers to commercialization were identified. The field tests which determined the performance characteristics for the TES are described and the TES systems, which included both ceramic and hydronic systems, are compared.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA. Lewis Res. Center Thermal Energy Storage; p 307-314
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    How to protect a wind turbine from lightning (1983)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Techniques for reducing the chances of lightning damage to wind turbines are discussed. The methods of providing a ground for a lightning strike are discussed. Then details are given on ways to protect electronic systems, generating and power equipment, blades, and mechanical components from direct and nearby lightning strikes.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-168229 , DOE/NASA/0007-1 , NAS 1.26:168229
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Characterization, performance, and prediction of a lead-acid battery under simulated electric vehicle driving requirements (1981)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A state-of-the-art 6-V battery module in current use by the electric vehicle industry was tested at the NASA Lewis Research Center to determine its performance characteristics under the SAE J227a driving schedules B, C, and D. The primary objective of the tests was to determine the effects of periods of recuperation and long and short periods of electrical regeneration in improving the performance of the battery module and hence extendng the vehicle range. A secondary objective was to formulate a computer program that would predict the performance of this battery module for the above driving schedules. The results show excellent correlation between the laboratory tests and predicted results. The predicted performance compared with laboratory tests was within +2.4 to -3.7 percent for the D schedule, +0.5 to -7.1 percent for the C schedule, and better than -11.4 percent for the B schedule.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-81771 , DOE/NASA/51044-19 , E-717
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Parametric study of prospective early commercial MHD power plants (PSPEC). General Electric Company, task 1: Parametric analysis (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The performance and cost of moderate technology coal-fired open cycle MHD/steam power plant designs which can be expected to require a shorter development time and have a lower development cost than previously considered mature OCMHD/steam plants were determined. Three base cases were considered: an indirectly-fired high temperature air heater (HTAH) subsystem delivering air at 2700 F, fired by a state of the art atmospheric pressure gasifier, and the HTAH subsystem was deleted and oxygen enrichment was used to obtain requisite MHD combustion temperature. Coal pile to bus bar efficiencies in ease case 1 ranged from 41.4% to 42.9%, and cost of electricity (COE) was highest of the three base cases. For base case 2 the efficiency range was 42.0% to 45.6%, and COE was lowest. For base case 3 the efficiency range was 42.9% to 44.4%, and COE was intermediate. The best parametric cases in bases cases 2 and 3 are recommended for conceptual design. Eventual choice between these approaches is dependent on further evaluation of the tradeoffs among HTAH development risk, O2 plant integration, and further refinements of comparative costs.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-159634 , DOE/NASA/0052-79/1
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Assessment of a 40-kilowatt stirling engine for underground mining applications (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: An assessment of alternative power souces for underground mining applications was performed. A 40-kW Stirling research engine was tested to evaluate its performance and emission characteristics when operated with helium working gas and diesel fuel. The engine, the test facility, and the test procedures are described. Performance and emission data for the engine operating with helium working gas and diesel fuel are reported and compared with data obtained with hydrogen working gas and unleaded gasoline fuel. Helium diesel test results are compared with the characteristics of current diesel engines and other Stirling engines. External surface temperature data are also presented. Emission and temperature results are compared with the Federal requirements for diesel underground mine engines. The durability potential of Stirling engines is discussed on the basis of the experience gaind during the engine tests.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-82822 , E-1171 , NAS 1.15:82822
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 8
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    Results of chopper-controlled discharge life cycling studies on lead acid batteries (1982)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: A group of 108 state of the art nominally 6 volt lead acid batteries were tested in a program of one charge/discharge cycle per day for over two years or to ultimate battery failure. The primary objective was to determine battery cycle life as a function of depth of discharge (25 to 75 percent), chopper frequency (100 to 1000 Hz), duty cycle (25 to 87.5 percent), and average discharge current (20 to 260 A). The secondary objective was to determine the types of battery failure modes, if any, were due to the above parameters. The four parameters above were incorporated in a statistically designed test program.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-TM-82912 , DOE/NASA/51044-26 , E-1293 , NAS 1.15:82912
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    Results of chopper-controlled discharge life cycling studies on lead-acid batteries (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: (previously announced in STAR as N82-30700)
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: IECEC ''82; Seventeenth Intersociety Energy Conversion Engineering Conference; Aug 08, 1982 - Aug 12, 1982; Los Angeles, CA
    Format: text
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    NASA TECHNICAL REPORTS
  • 10
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    Review of physics underlying recent improvements in silicon solar-cell performance (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: This paper provides a unifying view of the physics of silicon solar cells, and uses it as a basis for explaining how recent improvements in the performance of these cells have been achieved. The unification is facilitated by a region-by-region analysis of the solar cell, which is also used to compare several recently proposed cell structures.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Photovoltaic Specialists Conference; Jan 07, 1980 - Jan 10, 1980; San Diego, CA
    Format: text
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    NASA TECHNICAL REPORTS
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