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  • 1
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    Full System Modeling and Validation of the Carbon Dioxide Removal Assembly (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Man/System Technology and Life Support
    Type: M15-4133 , COMSOL Boston 2014; Oct 08, 2014 - Oct 10, 2014; Boston, MA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Modeling of Revitalization of Atmospheric Water (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: The Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project was initiated in September of 2011 as part of the Advanced Exploration Systems (AES) program. Under the ARREM project, testing of sub-scale and full-scale systems has been combined with multiphysics computer simulations for evaluation and optimization of subsystem approaches. In particular, this paper describes the testing and modeling of the water desiccant subsystem of the carbon dioxide removal assembly (CDRA). The goal is a full system predictive model of CDRA to guide system optimization and development.
    Keywords: Man/System Technology and Life Support
    Type: M14-4096 , COMSOL 2014; Oct 08, 2014 - Oct 10, 2014; Boston, MA; United States
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    NASA TECHNICAL REPORTS
  • 3
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    Full System Modeling and Validation of the Carbon Dioxide Removal Assembly (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Man/System Technology and Life Support
    Type: M14-3854 , International Conference on Environmental Systems; Jul 13, 2014 - Jul 17, 2014; Tuscon, AZ; United States
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    NASA TECHNICAL REPORTS
  • 4
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    Computer Simulation and Modeling of CO2 Removal Systems for Exploration (2015)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Man/System Technology and Life Support
    Type: M15-4751 , International Conference on Environmental Systems; Jul 12, 2015 - Jul 16, 2015; Bellevue, WA; United States
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    NASA TECHNICAL REPORTS
  • 5
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    Advancements in Carbon Dioxide and Water Vapor Separations Using COMSOL (2012)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: No abstract available
    Keywords: Man/System Technology and Life Support
    Type: M12-2240 , COMSOL Conference 2012; Oct 03, 2012 - Oct 05, 2012; Boston, MA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Modeling of Atmosphere Revitalization (2012)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: NASA's AES is pioneering new approaches for future human missions beyond Earth orbit. All spacecraft systems must be minimized with respect to mass, power, and volume. Here, we show work related to improving system efficiency and reliability for water separation systems on crewed vehicles and the initial development of COMSOL simulations in support of the Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project
    Keywords: Man/System Technology and Life Support
    Type: M12-2180 , COMSOL Boston; Oct 03, 2012 - Oct 05, 2012; Boston, MA; United States
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  • 7
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    Simulation Helps Improve Atmosphere Revitalization Systems for Manned Spacecraft (2014)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: Life support systems for manned spacecraft must provide breathable air and drinkable water for the astronauts. Through the Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project, engineers at NASA are developing atmosphere control devices for the safety of the onboard crew. The atmosphere in a manned spacecraft needs to be regularly revitalized in order to ensure the safety of the astronauts and the success of the space mission. For missions lasting a few months, this means air is continuously dehumidified, water collected for re-use, and carbon dioxide (CO2) ejected. One component of the onboard atmosphere control system is a water-saving device that Jim Knox, aerospace engineer at NASA, is optimizing through the Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project. He is leading a team at the Marshall Space Flight Center (Huntsville, Alabama) that is aiming to make the assembly more cost-effective and efficient by reducing its power usage and maximizing the water saved; their goal is to save 80-90% of the water in the air. They hope to offer flight system developers at NASA an integrated approach to atmosphere revitalization and water collection that will ultimately increase the time and distance space missions can travel.
    Keywords: Man/System Technology and Life Support
    Type: M14-3523
    Format: application/pdf
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  • 8
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    Development of Carbon Dioxide Removal Systems for Advanced Exploration Systems 2015-2016 (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: A long-term goal for NASA is to enable crewed missions to Mars: first to the vicinity of Mars, and then to the Mars surface. These missions present new challenges for all aspects of spacecraft design in comparison with the International Space Station, as resupply is unavailable in the transit phase, and early return is not possible. Additionally, mass, power, and volume must be minimized for all phases to reduce propulsion needs. Mass reduction is particularly crucial for Mars surface landing and liftoff due to the challenges inherent in these operations for even much smaller payloads. In this paper we describe current and planned developments in the area of carbon dioxide removal to support future crewed Mars missions. Activities are also described that apply to both the resolution of anomalies observed in the ISS CDRA and the design of life support systems for future missions.
    Keywords: Man/System Technology and Life Support
    Type: M16-4964 , International Conference on Environmental Systems (ICES) 2016; Jul 10, 2016 - Jul 14, 2016; Vienna; Austria
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  • 9
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    Predictive Modeling of the CDRA 4BMS (2016)
    In:  CASI
    Details
    Publication Date: 2019-07-19
    Description: Fully predictive models of the Four Bed Molecular Sieve of the Carbon Dioxide Removal Assembly on the International Space Station are being developed. This virtual laboratory will be used to help reduce mass, power, and volume requirements for future missions. In this paper we describe current and planned modeling developments in the area of carbon dioxide removal to support future crewed Mars missions as well as the resolution of anomalies observed in the ISS CDRA.
    Keywords: Man/System Technology and Life Support
    Type: M16-4991 , International Conference on Environmental Systems; Jul 10, 2016 - Jul 14, 2016; Vienna; Austria
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  • 10
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    Virtual Design of a 4-Bed Molecular Sieve for Exploration (2017)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Simulations of six new 4-Bed Molecular Sieve configurations have been performed using a COMSOL model. The preliminary results show that reductions in desiccant bed size and sorbent bed size when compared to the International Space Station configuration are feasible while still yielding a process that handles at least 4.0 kg/day CO2. The results also show that changes to the CO2 sorbent are likewise feasible. Decreasing the bed sizes was found to have very little negative effect on the adsorption process; breakthrough of CO2 in the sorbent bed was observed for two of the configurations, but water breakthrough in the desiccant beds was not observed. Nevertheless, both configurations for which CO2 breakthrough was observed still yield relatively high CO2 efficiency, and future investigations will focus on bed size in order to find the optimum configuration.
    Keywords: Man/System Technology and Life Support
    Type: ICES-2017-111 , M17-5887 , International Conference on Environmental Systems; Jul 16, 2017 - Jul 20, 2017; Charleston, SC; United States
    Format: application/pdf
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