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  • 1
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    Selling solar energy as a cash crop (1978)
    In:  Other Sources
    Details
    Publication Date: 2011-08-17
    Description: The paper considers solar energy equipment which, besides supplying energy for farmstead needs, would convert excess energy to a transportable form to sell to a power company. It is suggested that a concentrating two-axis tracking spheroidal collector would cost as little as $5/sq ft if mass produced. The proposed system uses 7854 sq ft of collector area (set in about one acre of land), and the cost payback is estimated.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Type: Agricultural Engineering; 59; Mar. 197
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Power Systems integration (1982)
    In:  Other Sources
    Details
    Publication Date: 2011-08-18
    Description: Power systems integration in large flexible space structures is discussed with emphasis upon body control. A solar array is discussed as a typical example of spacecraft configuration problems. Information on how electric batteries dominate life-cycle costs is presented in chart form. Information is given on liquid metal droplet generators and collectors, hot spot analysis, power dissipation in solar arrays, solar array protection optimization, and electromagnetic compatibility for a power system platform.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Lewis Research Center Large Space Systems(Propulsion Interactions; p 239-255
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Power modules and projected power systems evolution (1978)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Photovoltaic, solar thermal, and nuclear power systems are considered to supply future earth orbital electrical power requirements. A growth scenario from a 25-kW Power Module in the early Shuttle era to the 5- to 10-GW Satellite Power System in the year 2000 is presented. Photovoltaic systems are presently baselined in this evolution. The Photovoltaic Power System and subsystem growth projections, consistent with this scenario, were developed and are summarized.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Lewis Res. Center Future Orbital Power Systems Technol. Requirements; p 235-246
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    Laser power transmission for space power and propulsion (1978)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: An early status report is presented for a review being made of the state of development of major components and subsystems required for ground-to-space, space-to-space, or space-to-ground laser power transmission for electric or thermal power or propulsion. System characteristics are being evaluated from an applications viewpoint, and major problem areas are being identified. The object is to identify a rewarding first application of lasers for space power and propulsion. An evolution of laser power transmission capabilities over the next 20 years is projected. Supporting technology requirements are to be identified, priorities set, and continued developments coordinated with other government agencies.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Lewis Res. Center Future Orbital Power Systems Technol. Requirements; p 209-211
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 5
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    Solar-energy absorber: Active infrared (IR) trap without glass (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Absorber efficiency can be improved to 90% by removing glass plates and using infrared traps. Absorber configuration may be of interest to manufacturers of solar absorbers and to engineers and scientists developing new sources of energy.
    Keywords: MECHANICS
    Type: MFS-22744
    Format: application/pdf
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  • 6
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    Solar-energy absorber: Active infrared (IR) trap (1974)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Efficiency of solar-energy absorbers may be improved to 95% by actively cooling their intermediate glass plates. This approach may be of interest to manufacturers of solar absorbers and to engineers and scientists developing new sources of energy.
    Keywords: MECHANICS
    Type: MFS-22743
    Format: application/pdf
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  • 7
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    Solar energy trap (1976)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: An apparatus is described for trapping solar energy for heating a fluid that could be subsequently used in turbines and similar devices. The apparatus includes an elongated vertical light pipe having an open end through which the visible spectrum of electromagnetic radiation from the sun passes to strike a tubular absorber. The light pipe has a coated interior surface of a low absorptivity and a high reflectivity at the visible wavelengths and a high absorptivity/emissivity ratio at infrared wavelengths. The tubular absorber has a coating on the surface for absorbing visible wavelengths to heat the fluid passing through. Infrared wave lengths are radiated from the tubular absorber back into the light pipe for heating fluid passing through a tubular coil wound around it.
    Keywords: ENERGY PRODUCTION AND CONVERSION
    Format: application/pdf
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  • 8
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    Efficient Energy-Storage Concept (1982)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Space-platform energy-storage and attitude-stabilization system utilizes variable moment of inertia of two masses attached to ends of retractable cable. System would be brought to its initial operating speed by gravity-gradient pumping. When fully developed, concept could be part of an orbiting solar-energy collection system. Energy would be temporarily stored in system then transmitted to Earth by microwaves or other method.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-25331 , NASA Tech Briefs (ISSN 0145-319X); 6; 2; P. 147
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Single-axle, double-axis solar tracker (1979)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: Solar concentrator tracking mechanism consisting of angular axle and two synchronized drive motors, follows seasonal as well as diurnal changes in earth's orientation with respect to incoming sunlight.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-23267 , NASA Tech Briefs (ISSN 0145-319X); 4; 2; P. 197
    Format: text
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  • 10
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    Large-scale solar thermal collector concepts (1975)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: Thermal collector could be used ultimately to power steamplant to produce electricity. Collector would consist of two major subsystems: (1) series of segmented tracking mirrors with two axes of rotation and (2) absorber mounted on centrally located tower.
    Keywords: PHYSICAL SCIENCES
    Type: MFS-23167
    Format: application/pdf
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