The current Extravehicular Mobility Unit (EMU) system provides thermal control using a sublimator to reject both the heat produced by the astronaut's metabolic activity as well as the heat produced by the Portable Life Support Unit (PLSS). This sublimator vents up to eight pounds of water each Extravehicular Activity (EVA). If this load could be radiated to space, the amount of water that would need to be sublimated could be greatly reduced. There is enough surface area on the EMU that almost all of the heat can be rejected by radiation. Radiators, however, reject heat at a relatively constant rate, while the astronaut generates heat at a variable rate. To accommodate this variable heat load, NASA is developing a new freeze tolerant radiator where the tubes can selectively freeze to “turn down” the radiator and adjust to the heat rejection requirement. This radiator design significantly reduces the amount of expendable water needed for the sublimator. This paper describes the development of this freeze tolerant radiator.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Freeze Tolerant Radiator for Advanced EMU


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    International Conference On Environmental Systems ; 2004



    Publication date :

    2004-07-19




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    Freeze Tolerant Radiator for Advanced EMU

    Trevino, L. / Copeland, R. J. / Elliott, J. E. et al. | British Library Conference Proceedings | 2004


    Low-Power Freeze-Tolerant Radiator

    Ambrose, Jay / Streckert, Liz | AIAA | 2010


    A MULTI-ENVIRONMENT THERMAL CONTROL SYSTEM WITH FREEZE-TOLERANT RADIATOR

    Chen, W. / American Institute of Aeronautics and Astronautics | British Library Conference Proceedings | 2013



    Thermal/Vacuum Testing of a Two-Phase, Freeze Tolerant Radiator Panel

    Baker, Brian C. / Voss, Fred E. / Wolfe, George W. | SAE Technical Papers | 1995