Modeling Revitalization of Atmospheric Water

R. Coker[1], J. Knox[1]
[1]NASA, Marshall Space Flight Center, Huntsville, AL, USA
Published in 2013

Developments intended to improve system efficiency and reliability for water and carbon dioxide separation systems to be used on crewed vehicles combine sub-scale systems testing and multiphysics simulations. This paper describes the development of COMSOL Multiphysics® simulations in support of the Atmosphere Revitalization Recovery and Environmental Monitoring (ARREM) project within NASA's Advanced Exploration Systems (AES) program. The transport of a concentrated species, water or carbon dioxide in a carrier gas, namely nitrogen, was modeled as free and porous media flow through a bed of silica gel pellets. Using COMSOL to model the bulk desiccant process has resulted in a favorable match to temperature and concentration data for a range of inlet dew points, initial conditions, and flow rates.