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  • 1
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    CELSS Transportation Analysis (1985)
    In:  CASI
    Details
    Publication Date: 2016-06-07
    Description: Regenerative life support systems based on the use of biological material was considered for inclusion in manned spacecraft. Biological life support systems are developed in the controlled ecological life support system (CELSS) program. Because of the progress achieved in the CELSS program, it is determined which space missions may profit from use of the developing technology. Potential transportation cost savings by using CELSS technology for selected future manned space missions was evaluated. Six representative missions were selected which ranged from a low Earth orbit mission to those associated with asteroids and a Mars sortie. The crew sizes considered varied from four persons to five thousand. Other study parameters included mission duration and life support closure percentages, with the latter ranging from complete resupply of consumable life support materials to 97% closure of the life support system. The analytical study approach and the missions and systems considered, together with the benefits derived from CELSS when applicable are described.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA. Ames Research Center Controlled Ecol. Life Support System; p 55-64
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    CELSS transportation analysis (1984)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: The results of a study conducted in order to estimate where potential transportation cost savings can be anticipated by using CELSS technology for selected future manned space missions, are presented. Six manned missions ranging from a low earth orbit mission to those associated with asteroids and a Mars sortie are selected from NASA planning forecasts for study during an analysis of the transportation system. Several environmental control and life-support systems which are used in developing life-support closure scenarios are investigated for estimates of weight, volume, and power requirements. It is shown that when the scenarios are combined with the transportation analysis, mission life-support cost estimates are provided.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: Advances in Space Research (ISSN 0273-1177); 4; 12 1
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Controlled Ecological Life Support Systems (CELSS) physiochemical waste management systems evaluation (1986)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: Parametric data for six waste management subsystems considered for use on the Space Station are compared, i.e.: (1) dry incineration; (2) wet oxidation; (3) supercritical water oxidation; (4) vapor compression distillation; (5) thermoelectric integrated membrane evaporation system; and (6) vapor phase catalytic ammonia removal. The parameters selected for comparison are on-orbit weight and volume, resupply and return to Earth logistics, power consumption, and heat rejection. Trades studies are performed on subsystem parameters derived from the most recent literature. The Boeing Engineering Trade Study (BETS), an environmental control and life support system (ECLSS) trade study computer program developed by Boeing Aerospace Company, is used to properly size the subsystems under study. The six waste treatment subsystems modeled in this program are sized to process the wastes for a 90-day Space Station mission with an 8-person crew, and an emergency supply period of 28 days. The resulting subsystem parameters are compared not only on an individual subsystem level but also as part of an integrated ECLSS.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: NASA-CR-177422 , NAS 1.26:177422 , BAC-37
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 4
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    A near-term mission for CELSS (1983)
    In:  Other Sources
    Details
    Publication Date: 2019-06-28
    Description: A study has been conducted on the mission types that may benefit from Controlled Ecological Life Support System (CELSS) technology, with emphasis on manned missions projected by NASA for the next 50 years and cost evaluations in which transportation system characteristics are factored. The CELSS analyses considered water, air revitalization, waste management, and food production. The six mission locations considered included four in the earth-moon system, together with asteroid belt and Mars surface missions. In the various locations, the radiation, solar flux and available materials scenario can be very different. It is concluded on the basis of these considerations that the short duration Mars sortie mission analyzed will not benefit from CELLS technology, while large manned bases beyond the earth-moon system will not only benefit, but positively require it.
    Keywords: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
    Type: SAE PAPER 831149
    Format: text
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    NASA TECHNICAL REPORTS
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