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ECLSS E nvironmental C ontrol & L ife- S upport S ystems

ECLSS E nvironmental C ontrol & L ife- S upport S ystems. art credit: NASA ISS image: http://kids.msfc.nasa.gov/News/2000/News-StationAir.asp. Graphic: http://kids.msfc.nasa.gov/News/2000/News-StationAir.asp. ECLSS: Air Orbiter. Pressurization System : Orbiter Components

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ECLSS E nvironmental C ontrol & L ife- S upport S ystems

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  1. ECLSS Environmental Control & Life-Support Systems art credit: NASA ISS image: http://kids.msfc.nasa.gov/News/2000/News-StationAir.asp

  2. Graphic: http://kids.msfc.nasa.gov/News/2000/News-StationAir.asp

  3. ECLSS: AirOrbiter • Pressurization System: • Orbiter Components • 80% Nitrogen (11.2 psi*) • 20% Oxygen (3.5 psi*) • 3. Pressure varies: • 14.7 nominal • 16.7 cabin leak check • 10.2 before EVA • *Partial pressures do not correspond to percentages. N2 & O2 stored mid-fuselage

  4. ECLSS:AirStation Pressurization System Station Components • 80% N2 • 20% O2 • Pressure 14.7 psi Station Supply • N2 & O2 tanks: Progress resupply vehicles • O2 source: electrolysis • Backup O2: solid cartridges (exothermic) Oxygen Hydrogen Electrolysis Graphic: http://kids.msfc.nasa.gov/News/2000/News-StationAir.asp

  5. LiOH Canisters ECLSS: AirOrbiter Air Revitalization System (ARS): —cleans used airA. Microfilters: trap dust, crumbs, hair, skin cells, etc. B. LiOH canisters: remove CO2 (carbon dioxide) C. ATCO: turns CO into CO2 (Ambient Temperature Catalytic Oxidizer)

  6. ECLSS: AirStation Air Revitalization System (ARS): cleans used air • Gas Analyzers: check levels of O2, toxic gases; O2 added automatically as needed • (CDRA)Carbon Dioxide Removal Assembly: rechargeable CO2 removers (Metox canisters) • (TCCS)Trace Contaminant Control Subassembly: filters gas contaminants with charcoal • Harmful Impurities Filter – backs up TCCS

  7. ECLSS: WaterOrbiter Supply and Waste Water – Panel ML31C • Fuel Cells • produce water as a by-product of electricity • must be periodically purged to provide peak performance • 5 tanks: 75 gallons total A – drinking water B,C,D – cooling system E – waste water

  8. ECLSS: WaterStation Supply and Waste Water • Finite supply brought via unmanned resupply vehicles:Progress (Russia), ATV (ESA), HTV “Kounotori” (JAXA) • May 2009: Expedition 19—total recycling via Boeing’s Water Recovery and Management Subsystem

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