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International Space Station Carbon Dioxide Removal Assembly (ISS CDRA) Concepts and AdvancementsAn important aspect of air revitalization for life support in spacecraft is the removal of carbon dioxide from cabin air. Several types of carbon dioxide removal systems are in use in spacecraft life support. These systems rely on various removal techniques that employ different architectures and media for scrubbing CO2, such as permeable membranes, liquid amine, adsorbents, and absorbents. Sorbent systems have been used since the first manned missions. The current state of key technology is the existing International Space Station (ISS) Carbon Dioxide Removal Assembly (CDRA), a system that selectively removes carbon dioxide from the cabin atmosphere. The CDRA system was launched aboard UF-2 in February 2001 and resides in the U.S. Destiny Laboratory module. During the past four years, the CDRA system has operated with varying degrees of success. There have been several approaches to troubleshooting the CDRA system aimed at developing work-around solutions that would minimize the impact on astronaut time required to implement interim solutions. The paper discusses some of the short-term fixes applied to promote hardware life and restore functionality, as well as long-term plans and solutions for improving operability and reliability. The CDRA is a critical piece of life support equipment in the air revitalization system of the ISS, and is demonstrated technology that may ultimately prove well-suited for use in lunar or Mars base, and Mars transit life support applications.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Preprint (Draft being sent to journal)
ElSherif, Dina
(Honeywell International, Inc. Torrance, CA, AZ, United States)
Knox, James C.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 7, 2013
Publication Date
July 1, 2005
Subject Category
Man/System Technology And Life Support
Report/Patent Number
Meeting Information
Meeting: International Conference on Environmental Systems
Location: Rome
Country: Italy
Start Date: July 11, 2005
End Date: July 14, 2005
Distribution Limits
Public Use Permitted.
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