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  • ENERGY PRODUCTION AND CONVERSION  (6)
  • STRUCTURAL MECHANICS
  • 2005-2009
  • 1990-1994
  • 1980-1984  (7)
  • 1980  (7)
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Keywords
Years
  • 2005-2009
  • 1990-1994
  • 1980-1984  (7)
Year
  • 1
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    Electromagnetic compatibility overview (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An assessment of the electromagnetic compatibility impact of the Satellite Power System is discussed. The discussion is divided into two parts: determination of the emission expected from SPS including their spatial and spectral distributions, and evaluation of the impact of such emissions on electromagnetic systems including considerations of means for mitigating effects.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Washington The Final Proc. of the Solar Power Satellite Program Rev.; p 120-121
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The EMC impact of SPS operations on low Earth orbit satellites (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The susceptibility of various operational and planned low Earth orbit satellites to solar power satellite (SPS) operations was examined. Functional degradation for the electronic systems on LANDSAT, the global positioning system, and the space telescope is described in relation to the amplitude of the SPS illumination components. Analyses include the modes of coupling to devices and subsystems, and performance effects in relation to satellite mission.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Washington The Final Proc. of the Solar Power Satellite Program Rev.; p 431-434
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Summary of the electromagnetic compatibility evaluation of the proposed satellite power system (1980)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: The effects of the proposed solar power satellite (SPS) operations on electronic equipment and systems by fundamental, harmonic, and intermodulation component emissions from the orbital station; and the fundamental, harmonic, and structural intermodulation emissions from the rectenna site were evaluated. The coupling and affects interactions affecting a wide spectrum of electronic equipment are considered. The primary EMC tasking areas are each discussed separately.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA, Washington The Final Proc. of the Solar Satellite Program Rev.; p 414-418
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Effect of impurities and processing on silicon solar cells. Volume 1: Characterization methods for impurities in silicon and impurity effects data base (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Two major topics are treated: methods to measure and evaluate impurity effects in silicon and comprehensive tabulations of data derived during the study. Discussions of deep level spectroscopy, detailed dark I-V measurements, recombination lifetime determination, scanned laser photo-response, conventional solar cell I-V techniques, and descriptions of silicon chemical analysis are presented and discussed. The tabulated data include lists of impurity segregation coefficients, ingot impurity analyses and estimated concentrations, typical deep level impurity spectra, photoconductive and open circuit decay lifetimes for individual metal-doped ingots, and a complete tabulation of the cell I-V characteristics of nearly 200 ingots.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: NASA-CR-162627 , DOE/JPL-954331-80/9 , JPL-9950-299 , QR-17
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Stress analysis and buckling of J-stiffened graphite-epoxy panel (1980)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: A graphite epoxy shear panel with bonded on J stiffeners was investigated. The panel, loaded to buckling in a picture frame shear test is described. Two finite element models, each of which included the doubler material bonded to the panel skin under the stiffeners and at the panel edges, were used to make a stress analysis of the panel. The shear load distributions in the panel from two commonly used boundary conditions, applied shear load and applied displacement, were compared with the results from one of the finite element models that included the picture frame test fixture.
    Keywords: STRUCTURAL MECHANICS
    Type: NASA-TP-1607 , L-13256
    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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    Solar cells and modules from dentritic web silicon (1980)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Some of the noteworthy features of the processes developed in the fabrication of solar cell modules are the handling of long lengths of web, the use of cost effective dip coating of photoresist and antireflection coatings, selective electroplating of the grid pattern and ultrasonic bonding of the cell interconnect. Data on the cells is obtained by means of dark I-V analysis and deep level transient spectroscopy. A histogram of over 100 dentritic web solar cells fabricated in a number of runs using different web crystals shows an average efficiency of over 13%, with some efficiencies running above 15%. Lower cell efficiency is generally associated with low minority carrier time due to recombination centers sometimes present in the bulk silicon. A cost analysis of the process sequence using a 25 MW production line indicates a selling price of $0.75/peak watt in 1986. It is concluded that the efficiency of dentritic web cells approaches that of float zone silicon cells, reduced somewhat by the lower bulk lifetime of the former.
    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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