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ECLSS Environmental Control & Life Support Systems

ECLSS Environmental Control & Life Support Systems. MEDS – Multi-function electronic Display System retrofitted to Atlantis 1999. ECLSS PANELS Orbiter. L1 & L2. ML31C. Space Station Regenerative ECLSS Flow Diagram (Current). ECLSS: Air Earth.

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ECLSS Environmental Control & Life Support Systems

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  1. ECLSS Environmental Control & Life Support Systems

  2. MEDS – Multi-function electronic Display System retrofitted to Atlantis 1999 ECLSSPANELSOrbiter L1 & L2 ML31C

  3. Space Station Regenerative ECLSS Flow Diagram (Current)

  4. ECLSS: Air Earth • Pressurization System - supplies breathable air A. Earth’s Atmosphere • 1. ~79% Nitrogen • 2. ~21% Oxygen • 3. < 1% Trace Elements • 4. 14.7 psi

  5. ECLSS: AirOrbiter Only • I. Pressurization System(cont) • B. Orbiter Components • 80% Nitrogen (11.2 psi*) • 20% Oxygen (3.5 psi*) • *partial pressures do not correspond to percentages • 4. Pressure varies: • 14.7 nominal • 16.7 cabin leak check • 10.2 before EVA N2 & O2 stored midfuselage

  6. ECLSS Air Station Only I. Pressurization System(cont.) D. Station Components • 80% N2, 20% O2 • Pressure 14.7 psi E. Station Supply • N2 & O2 tanks: Progress • O2 source: electrolysis • Backup O2: solid cartridges (exothermic) Oxygen Hydrogen Electrolysis Graphic: http://kids.msfc.nasa.gov/News/2000/News-StationAir.asp

  7. ECLSS: AirOrbiter Only II. Air Revitalization System (ARS) – cleans used airA. ARS Microfilters -traps dust, hair, skin cells, etc… B. LiOH canisters-removes carbon dioxide C. ATCO (Ambient Temperature Catalytic Oxidizer) - turns CO into CO2 LiOH Canisters

  8. ECLSS Air Station Only • Air Revitalization System (ARS) – cleans used air A. Gas Analyzers: check levels of O2, toxic gases; O2 added automatically as needed B. CDRA – Carbon Dioxide Removal Assembly - rechargeable CO2 removers

  9. ECLSS Air Station Only • Air Revitalization System (ARS) – cleans used air • C. Trace Contaminant Control Subassembly – filters gas contaminants with charcoal • D. Harmful Impurities Filter – backs up TCCS

  10. ECLSS: Air Orbiter/Station II. Air Revitalization System (cont)D. Heat Exchanger -Nominal temperature:65-80°F -Nominal humidity: 35-60% -Cabin air passes or bypasses heat exchanger -Station temp, humidity more consistent & homogeneous than orbiter

  11. ECLSS: WaterOrbiter Only III. Supply and Waste Water – Panel ML31C A. Fuel Cells -produce water as a by-product of electricity -purge for peak performance B. 5 tanks: 75 gallons total A – drinking water B,C,D – cooling system E – waste water

  12. How Do You Go To The Bathroom In Space?

  13. ECLSS: Water Station Only III. Supply and Waste WaterA. Finite supply brought via Progress or Shuttle B. May 2009: total recycling via Boeing’s Water Recovery and Management Subsystem

  14. ECLSS Review ECLSS regulates 3 things: Air - pressure & revitalization Temperature Water – supply & waste Nominal air components: N2 – 80% (11.2 psi) O2 – 20 % (3.5 psi) Nominal Temp & Humidity: 65-80 F, 35-60%

  15. ECLSS Environmental Control & Life Support Systems Challenge Can you convert the Astronaut urine into clean drinking water? You have a budget of 1200 credits – plan your spending wisely. We will be marking your success on the pH of the water, the Clairty (colour) and the efficiency (don’t lose any water!).

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