Evolution of the Atmosphere Maintaining Environment Control and Life Support Systems for United States Elements of Space Station Freedom 941602

Designs for the systems that will maintain a comfortable, contaminant-free atmosphere on board the Space Station have evolved through an extensive program of studies, prototype development and evaluation testing to the system baselined at the Space Station Freedom Critical Design Review.
This paper documents the systems' evolution from the selection of concepts for evaluation in the initial study phase of the Space Station Program through the studies and testing that established baseline technologies to the preliminary design and development testing that provided data to enable the detailed flight designs presented and baselined at the Critical Design Review.
The systems addressed include Temperature and Humidity Control, which maintains comfortable temperatures in the elements, provides ventilation, and removes excess humidity; Atmosphere Control and Supply, which maintains the atmosphere's total pressure and oxygen partial pressure; and Atmosphere Revitalization, which removes carbon dioxide and trace contaminants and monitors the concentrations of the major constituents of the atmosphere.


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