Status of the Advanced Oxygen Generation Assembly Design



Journal Title

Journal ISSN

Volume Title


50th International Conference on Environmental Systems


Future Exploration missions will require an Oxygen Generation Assembly (OGA) to electrolyze water to supply oxygen for crew metabolic consumption. The system design will be based on the International Space Station (ISS) OGA but with added improvements based on lessons learned during ISS operations and technological advances since the original OGA was designed and built. The goal of these improvements will be to reduce system weight, crew maintenance time and spares mass while increasing reliability. Over the past year, the team has performed design reviews, testing and analysis. Upgrades that will be incorporated include: redesign of the electrolysis cell stack, redesign of the hydrogen dome, replacement of the hydrogen sensors, redesign of the recirculation loop deionizing bed, and incorporation of recirculation loop nitrogen purging and water flushing. The ISS OGA will be upgraded to an Advanced OGA (AOGA) configuration and its operation demonstrated in a flight environment.


Kevin Takada, NASA
Alesha Ridley, NASA
Steven Van Keuren, The Boeing Company
Stephen Mcdougle, MEI Technologies
Phillip Baker, Collins Aerospace
ICES302: Physio-chemical Life Support- Air Revitalization Systems -Technology and Process Development
The 50th International Conference on Environmental Systems was held virtually on 12 July 2021 through 14 July 2021.


Oxygen Generation Assembly, Environmental Control and Life Support Systems, Electrolysis