As part of NASA's initiative to develop an advanced portable life support system (PLSS), a baseline schematic has been chosen that includes gaseous oxygen in a closed circuit ventilation configuration. Supply oxygen enters the suit at the back of the helmet, passes over the astronaut's body, and is extracted at the astronaut's wrists and ankles through the liquid cooling and ventilation garment (LCVG). The extracted gases are then treated using a rapid cycling amine (RCA) system for carbon dioxide and water removal and activated carbon for trace gas removal before being mixed with makeup oxygen and reintroduced into the helmet. Thermal control is provided by a suit water membrane evaporator (SWME).As an extension of the original schematic development, NASA evaluated several Helmet Exhalation Capture System (HECS) configurations as alternatives to the baseline. The HECS configurations incorporate the use of full contact masks or non-contact masks to reduce flow requirements within the PLSS ventilation subsystem. The primary scope of this study was to compare the alternatives based on mass and volume considerations; however other design issues were also briefly investigated. This paper summarizes the results of this sizing analysis task.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Helmet Exhalation Capture System (HECS) Sizing Evaluation for an Advanced Space Suit Portable Life Support System


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Conference On Environmental Systems ; 2008



    Publication date :

    2008-06-29




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Helmet Exhalation Capture System (HECS) Sizing Evaluation for an Advanced Space Suit Portable Life Support System

    Paul, H.L. / Waguespack, G. / Conger, B. et al. | British Library Conference Proceedings | 2008


    Advanced Space Suit Portable Life Support Subsystem Packaging Design

    Barnett, Bob / Diep, Chuong / Thomas, Gretchen et al. | SAE Technical Papers | 2006


    Advanced Space Suit Portable Life Support Subsystem Packaging Design

    Howe, R. / Diep, C. / Barnett, B. et al. | British Library Conference Proceedings | 2006


    A New Method for Breath Capture Inside a Space Suit Helmet

    Tufano, Brett / Dolder, Craig / Paul, Heather L. et al. | SAE Technical Papers | 2007


    A New Method for Breath Capture Inside a Space Suit Helmet

    Filburn, T. / Dolder, C. / Tufano, B. et al. | British Library Conference Proceedings | 2007