• ARMAS Flight System for Operational Aerospace Radiation Measurements 

  Kent Tobiska; Leonid Didkovsky; Kevin Judge; David Bouwer; Seth Wieman; Brad Gersey; Bill Atwell; Rick Wilkins (49th International Conference on Environmental Systems, 2019-07-07)

  In this paper we describe the Automated Radiation Measurements for Aerospace Safety (ARMAS) operational system that has been developed to produce quality and calibrated absorbed dose measurements for aerospace safety. The ...

• The Combustion Product Monitor Instrument for the Spacecraft Fire Safety Demonstration Project 

  Mathieu Fradet; Ryan Briggs; Rudi Bendig (49th International Conference on Environmental Systems, 2019-07-07)

  The Combustion Product Monitor (CPM) instrument is a six-channel tunable laser absorption spectrometer capable of measuring ambient gas-phase concentrations of CO, HCl, HCN, HF, CO2, and O2 in spacecraft environments. ...

• Charging Considerations Effects in Ground Testing Loop Heat Pipes 

  Brian d'Entremont; Jay Ochterbeck (49th International Conference on Environmental Systems, 2019-07-07)

  Investigation of the literature shows that many researchers expect the LHP compensation chamber to become full in the constant conductance regime, while others expect it to remain two-phase at all times. The distinction ...

• Robust Liquid Volume Sensor for Flexible Bladders in Microgravity 

  Marc Ramsey; Cinda Chullen; Eric Desjardins; David Callender; Jed Wilbur; Nicolas Espinosa; Jay Buckey (49th International Conference on Environmental Systems, 2019-07-07)

  The Portable Life Support System (PLSS) on the Advanced Space Suit (AEMU) will carry consumable cooling water maintained at ambient pressure within an array of soft-walled, flexible reservoirs known collectively as the ...

• Rapid Cycle Amine Testing History 

  Rachel Sturtz; Bruce Conger; Cinda Chullen (49th International Conference on Environmental Systems, 2019-07-07)

  NASA is developing an Exploration Extravehicular Mobility Unit (xEMU) targeted as a flight demonstration unit on the International Space Station (ISS) in 2023. A major subsystem of the xEMU is the portable life support ...

• Orion Laptop Fire Thermal Analysis 

  Thomas Paul (49th International Conference on Environmental Systems, 2019-07-07)

  Recent efforts in simulating fire events within a crewed vehicle have often taken the approach of simulating the fire using CFD tools. While these tools can provide a high fidelity of detail about the cabin conditions ...

• Development and Characterization of a LiOH Air Regeneration Model in Thermal Desktop 

  Cheyn Worn; John Keener (49th International Conference on Environmental Systems, 2019-07-07)

  Orion post landing activities use a lithium hydroxide (LiOH)-based scrubber for CO2 removal and so a robust Thermal Desktop model for these activities requires a LiOH computational algorithm. The chemical sequesters CO2 ...

• NASA Centennial Challenges Program: A crowdsourcing tool to advance life support technologies for future NASA missions 

  Monsi Roman; Molly Anderson; Angela Herblet; Christopher Frangione; Jennifer Bravo (49th International Conference on Environmental Systems, 2019-07-07)

  Historically, competitions and prizes such as those executed by the NASA Centennial Challenges (CC) Program have created broader avenues through which to spur innovation from unlikely sources. Examples of past successful ...

• Design and Analysis of a Fan Outlet Check Valve for the Exploration Portable Life Support System 

  Glenn Waguespack; Anthony Hanford; Bruce Barnes (49th International Conference on Environmental Systems, 2019-07-07)

  Check valves are required at the outlets of NASA’s Exploration Portable Life Support System (xPLSS) ventilation loop fans to permit forward flow through the ventilation loop while preventing backflow through the fans when ...

• Exploration PLSS Thermal Desktop Modeling 

  Bruce Barnes; Brittany Abraham; Bruno Miranda; Latham Speasmaker; Quoc Nguyen (49th International Conference on Environmental Systems, 2019-07-07)

  The Exploration Portable Life Support System (xPLSS) maintains life support for a suited crew member during Extravehicular Activity (EVA). The thermal and pneumatic/hydraulic interactions within the xPLSS have been modeled ...

• Modeling of Complex Oxygen Compression Heating Scenarios for the Exploration Extravehicular Mobility Unit Umbilical 

  Margot Steely; Thomas Paul (49th International Conference on Environmental Systems, 2019-07-07)

  Following an Extravehicular Activity (EVA), the primary oxygen tank located in the Portable Life Support System (PLSS) of the Exploration Extravehicular Mobility Unit (xEMU) must be refilled before the suit can be used ...

• Updates to the Metabolic Rate Computation Methods Employed by the Caution and Warning System in the Exploration PLSS 

  Tsvetelina Baryakova (49th International Conference on Environmental Systems, 2019-07-07)

  The crewmember metabolic rate (MR, Qmet) during Extravehicular Activity (EVA) is a measure of energy expenditure and can be calculated in the Caution and Warning System (CWS) of the Exploration Portable Life Support System ...

• A User-Driven Tool for Predicting Contaminant Loading Profiles in the Thermal Control Loop of the Exploration PLSS 

  Tsvetelina Baryakova (49th International Conference on Environmental Systems, 2019-07-07)

  The Thermal Control Loop (TCL) of the Exploration Portable Life Support System (xPLSS) is responsible for circulating cooling water through the Liquid Cooling Ventilation Garment (LCVG) to remove the metabolic waste heat ...

• Carbon Resistant Electrode for Direct Utilization of Hydrocarbon Fuels in Elevated Temperature Solid State Electrochemical Systems 

  Boxun Hu; Seraphim Belko; Junsung Hong; Ashish Aphale; Michael Reisert; Rajesh Kumar; Avinash Dongare; Prabhakar Singh (49th International Conference on Environmental Systems, 2019-07-07)

  Direct utilization of hydrocarbon fuels in elevated temperature solid state electrochemical systems offers potential for improvement in electrical performance, better thermal management in the cell and stack as well as use ...

• Capture of Trace Airborne Contaminants: Application to Electrochemical Systems 

  Ashish Aphale; Michael Reisert; Junsung Hong; Su Jeong Heo; Boxun Hu; Prabhakar Singh (49th International Conference on Environmental Systems, 2019-07-07)

  Terrestrial and space environments, commonly encountered for life support and in-situ resource utilization (ISRU), contain a number of trace (ppm-ppt) levels of intrinsic and extrinsic impurities originating from source ...

• Solid State Electrochemical Oxygen Separation and Compression 

  Michael Reisert; Ashish Aphale; Dale Taylor; John Graf; Prabhakar Singh; Boxun Hu; Su Jeong Heo; Junsung Hong (49th International Conference on Environmental Systems, 2019-07-07)

  Ceramic and solid-state electrochemical oxygen separation and compression systems offer the ease of producing high purity and high pressure oxygen from a variety of gaseous streams representative of ambient and constrained ...

• Advanced Glass Seal for Electrochemical Oxygen Separation-Compression Device 

  Michael Reisert; Ashish Aphale; Junsung Hong; Manoj Mahapatra; Prabhakar Singh (49th International Conference on Environmental Systems, 2019-07-07)

  Glass-based sealing materials are preferred for hermetic sealing of high temperature electrochemical devices due to flexibility in tuning the thermophysical properties by formulation chemistry. Ease of manufacturing and ...

• Development of an Augmented Reality System for Human Space Operations 

  Carlos Pinedo; Jordan DIxon; Christine Chang; Donna Auguste; Mckenna Brewer; Devin Desilva; Chris Hill; Cassidy Jensen; Amanda Jones; James Voss; Allison Anderson (49th International Conference on Environmental Systems, 2019-07-07)

  In this work we develop an augmented reality (AR) heads up display for astronauts during extravehicular activity (EVA) operations. This work takes advantage of recent advances in commercial heads-up-display (HUD) technology ...

• Advanced Oxygen Generation Assembly for Exploration Missions 

  Kevin Takada; Steven Van Keuren; Luis Velasquez; Phillip Baker; Stephen McDougle (49th International Conference on Environmental Systems, 2019-07-07)

  Future Exploration missions will require an Oxygen Generation Assembly (OGA) to electrolyze water to supply oxygen for crew metabolic consumption. The system design will be based on the International Space Station (ISS) ...

• Follow-on Studies Using the Voyager Spacecraft Thermal Model 

  William Ledeboer; Gordon Cucullu; Juan Villalvazo; Todd Barber; Enrique Medina (49th International Conference on Environmental Systems, 2019-07-07)

  The 42-year-old Voyager Interstellar Mission (VIM) is operating long beyond its design life. In 2012, Voyager 1 crossed into interstellar space and Voyager 2 is believed to be very close to making the same transit. Due to ...

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