Modeling of Gateway Environment Control and Life Support Systems as a Means to Investigate the Subsystem and Integrated Architecture Performance

As human spaceflight evolves and develops, the technology the crew relies on for life support must become more advanced than at any point in NASA's history. Nowhere is this more apparent than the Gateway, where lessons learned from ISS are being applied in the design and production. Some of these technological improvements are proven in flight configuration, or have a heritage of proven flight hardware, but many are of a lower technology readiness level. Due to the unpredictable nature of the metabolic byproducts (CO2, H2O, and heat), even proven technologies can fail to meet requirements for crew safety. Detailed modeling of individual components excels in proving component level requirements are met, but fails to verify system or architecture level requirements. This paper expounds upon an effort to take a number of detailed component level models of the Gateway ECLSS and integrate them into a larger architecture model known as the Gateway Integrated ECLSS Model (GIEM). The GIEM is then used to study how the subsystems work synergistically to meet environmental requirements, as well as investigate how changes at the component level effect the Gateway stack as a whole.