Browsing by Author "Duggan, Matthew"
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Item Beyond LEO: Life Support Requirements and Technology Development Strategy(44th International Conference on Environmental Systems, 2014-07-13) Guirgis, Peggy; West, William; Heldmann, Michael; Samplatsky, Darren; Gentry, Gregory; Duggan, MatthewThis paper reviews basic Life Support Systems requirements for a conceptual Earth- Moon Libration Point-2 (EML-2) orbiting facility and conceptual early stage Lunar and Mars bases, highlighting commonalities and unique challenges for each. Recommendations are made for both near-term and long-term key technology development investments in a progressive approach to technology development that supports needs of the above missions and aligns with the current fiscally constrained environment. This approach leverages available commercial-off-the-shelf (COTS) hardware and already developed space-flight hardware, while providing the rationale for a corresponding modestly elevated risk posture intended to bring down development costs, and to prioritize which technologies unavailable through COTS are in highest need of development. The recommendations provide guidance for Life Support Systems technology development planning activities.Item Comparative Assessment of Delivering Consumable Resources versus In-Situ Resource Utilization for Moon and Mars Habitats Life Support Systems(45th International Conference on Environmental Systems, 2015-07-12) West, William; Heldmann, Michael; Scull, Timothy; Samplatsky, Darren; Gentry, Gregory J.; Duggan, Matthew; Klaus, KurtThis paper will estimate oxygen, nitrogen and water resupply needs for a crewed lunar or Martian surface habitat, assuming relevant mission parameters, current ISS levels of loop closure, assumptions on leakage and venting and the addition of laundry and shower facilities. The paper will then identify lunar and Mars ECLS ISRU candidates and trade ISRU vs. delivery of supplies from earth. Lunar ISRU candidates include water and oxygen from putative lunarpolar ice deposits. Mars ISRU candidates include water, oxygen from ice and nitrogen/argon/oxygen from atmospheric constituents. For given assumptions a crossover point for each constituent will be identified where it will become more advantageous to seek ISRU solutions rather than re-supply from earth.