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ECLSS: Environmental Control for Space Life Support

Discover the intricate systems of ECLSS, regulating air pressure, temperature, and water supply in space environments. Learn how the Multi-function Electronic Display System was retrofitted to Atlantis in 1999 and explore the Space Station Regenerative ECLSS flow diagram. With detailed air revitalization and water recovery processes, ECLSS ensures astronauts have breathable air and clean drinking water. Can you convert astronaut urine into drinking water within budget constraints? Plan wisely and achieve success based on water pH, clarity, and efficiency!

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ECLSS: Environmental Control for Space Life Support

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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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