2017-07-072017-07-072017-07-16ICES_2017_256http://hdl.handle.net/2346/73048Richard Schunk, NASA Marshall Space Flight Center (MSFC), USAWarren Peters, NASA Marshall Space Flight Center (MSFC), USAJohn Thomas, NASA Marshall Space Flight Center (MSFC), USAICES302: Physio-chemical Life Support- Air Revitalization Systems -Technology and Process DevelopmentThe 47th International Conference on Environmental Systems was held in South Carolina, USA on 16 July 2017 through 20 July 2017.A 4BMS-X (Four Bed Molecular Sieve – Exploration) design and heater optimization study for CO2 sorbent beds in proposed exploration system architectures is presented. The primary objectives of the study are to reduce heater power and thermal gradients within the CO2 sorbent beds while minimizing channeling effects. Some of the notable changes from the ISS (International Space Station) CDRA (Carbon Dioxide Removal Assembly) to the proposed exploration system architecture include cylindrical beds, alternate sorbents and an improved heater core. Results from both 2D and 3D sorbent bed thermal models with integrated heaters are presented. The 2D sorbent bed models are used to optimize heater power and fin geometry while the 3D models address end effects in the beds for more realistic thermal gradient and heater power predictions.application/pdfengCarbon Dioxide RemovalFour Bed Molecular SieveHeater DesignPresentations