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  • 1
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    Merits of flywheels for spacecraft energy storage (1984)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Flywheel energy storage systems which have a very good potential for use in spacecraft are discussed. This system can be superior to alkaline secondary batteries and regenerable fuel cells in most of the areas that are important in spacecraft applications. Of special importance, relative to batteries, are lighter weight, longer cycle and operating life, and high efficiency which minimizes solar array size and the amount of orbital makeup fuel required. Flywheel systems have a long shelf life, give a precise state of charge indication, have modest thermal control needs, are capable of multiple discharges per orbit, have simple ground handling needs, and have characteristics which would be useful for military applications. The major disadvantages of flywheel energy storage systems are that: power is not available during the launch phase without special provisions; and in flight failure of units may force shutdown of good counter rotating units, amplifying the effects of failure and limiting power distribution system options; no inherent emergency power capability unless specifically designed for, and a high level of complexity compared with batteries. The potential advantages of the flywheel energy storage system far outweigh the disadvantages.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: NASA. Langley Research Center An Assessment of Integrated Flywheel System Technol.; p 75-89
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Flywheel energy storage for spacecraft (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: Flywheel energy storage systems have been studied to determine their potential for use in spacecraft. This system was found to be superior to alkaline secondary batteries and regenerative fuel cells in most of the areas that are important in spacecraft applications. Of special importance, relative to batteries, are lighter weight, longer cycle and operating life, and high efficiency which minimizes solar array size and the amount of orbital makeup fuel required. In addition, flywheel systems have a long shelf life, give a precise state of charge indication, have modest thermal control needs, are capable of multiple discharges per orbit, have simple ground handling needs, and have the capability of generating extremely high power for short durations.
    Keywords: SPACECRAFT PROPULSION AND POWER
    Type: IECEC ''84: Advanced energy systems - Their role in our future; Aug 19, 1984 - Aug 24, 1984; San Francisco, CA
    Format: text
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    NASA TECHNICAL REPORTS
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