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Coeus Engineering

Coeus Engineering. Integrated Carbon Dioxide/Moisture Removal System for NASA-ECLSS. Dennis Arnold - Team Leader, Research Jessica Badger - Coordinator, Research. Julia Thompson - Research April Snowden - Research. Team Organization. What is a Carbon Dioxide /Moisture Removal System?.

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Coeus Engineering

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  1. Coeus Engineering Integrated Carbon Dioxide/Moisture Removal System for NASA-ECLSS

  2. Dennis Arnold - Team Leader, Research Jessica Badger - Coordinator, Research Julia Thompson - Research April Snowden - Research Team Organization

  3. What is a Carbon Dioxide/Moisture Removal System? • Air filtering device used in spacecraft environments • Removes carbon dioxide, moisture, ammonia, and heat from the air • Maintains breathable atmosphere

  4. Past Carbon Dioxide Removal Systems • Apollo Command Module • Shuttle • Shuttle EDO • ISS • CRV

  5. Apollo Command Module • Used heat exchanger with fine capillary wick for water removal • Used LiOH canisters for CO2 removal • Extensive ground support needed for launch • Not a good design for long duration missions

  6. Shuttle • Used condensing heat exchanger (CHX) and rotary gas separator to remove water and heat • Needed LiOH canisters to provide CO2 removal • Needed antibacterial coating on CHX

  7. Shuttle EDO • Uses CHX to remove water • Uses RCRS to remove CO2 • Requires large bed to meet removal requirements • Needs fan, and an air save compressor • Needs extra LiOH canisters

  8. ISS • Uses CHX to remove water to a waste water recovery system • Thermally regenerated molecular sieve removes CO2 • Two beds • 30 min cycle time • Requires too much power (800 W compared to 140 W) • CHX biofouling problem (mold) • Backup LiOH canisters required

  9. CRV • Calcium Oxide canisters for water removal • LiOH canisters for CO2 removal • Non-condensing heat exchanger • Removes heat only • Long storage life • Short usage time

  10. Proposed Space Launch Initiative (SLI) System • CO2 and water removal performed by newly developed amine chemical formulations • No CHX required • No rotary gas/ liquid separator required • Vastly improved efficiency • No backup LiOH canisters required • Absorbent beds are smaller, thus cycle times are longer

  11. Our Primary Focus • CO2 & Moisture Removal System (CMRS) Bed Design • Heat transfer • Mass transfer • Pressure drop • Surface area for chemical support • Manufacturing ease • Mechanical reliability

  12. Future Plans • Meet with John Graf • Obtain RCRS assembly drawings • Obtain absorption rates of water and CO2 for new chemical • Obtain manufacturing requirements and tolerances • Develop computer model of heat transfer and mass flow rates through bed

  13. Questions? • Preguntas? • Questionne? • Bопрос? • Kwestie? • Ninau? • Swali? • Spørsmål? • Förhöra?

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