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  • Man/System Technology and Life Support  (7)
  • 2005-2009  (7)
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  • 1
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    Performance of the Extravehicular Mobility Unit (EMU): Airlock Coolant Loop Recovery (A/L CLR) Hardware - Phase II (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: An EMU water processing kit (Airlock Coolant Loop Recovery A/L CLR) was developed as a corrective action to Extravehicular Mobility Unit (EMU) coolant flow disruptions experienced on the International Space Station (ISS) in May of 2004 and thereafter. Conservative schedules for A/L CLR use and component life were initially developed and implemented based on prior analysis results and analytical modeling. The examination of postflight samples and EMU hardware in November of 2006 indicated that the A/L CLR kits were functioning well and had excess capacity that would allow a relaxation of the initially conservative schedules of use and component life. A relaxed use schedule and list of component lives was implemented thereafter. Since the adoption of the relaxed A/L CLR schedules of use and component lives, several A/L CLR kit components, transport loop water samples and sensitive EMU transport loop components have been examined to gage the impact of the relaxed requirements. The intent of this paper is to summarize the findings of that evaluation, and to outline updated schedules for A/L CLR use and component life.
    Keywords: Man/System Technology and Life Support
    Type: 39th International Conference on Environmental Systems; Jul 12, 2009 - Jul 16, 2009; Savannah, GA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Diameter Versus Mass in the Development of the Orion Life Support Umbilical: A Case Study in Systems Engineering (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: Systems engineering could also be called the art of compromise. At its heart, systems engineering seeks to find that solution which maximizes the utility of the system, usually compromising the performance of each individual subsystem. While seemingly straightforward, systems engineering methodology is complicated when the utility to be maximized is unclear and the costs to each individual subsystem are not - or not easily - quantifiable. In this paper, we explore one such systems engineering problem within the Constellation Program as a case study in applied systems engineering. During suited operations, astronauts within Orion will be connected to an umbilical to receive and return breathing gas. The pressure drop associated with this umbilical must be overcome by the Orion vehicle. A smaller umbilical, which is desirable for crew operations, means a higher pressure drop, resulting in additional mass and power for the vehicle. We outline the technical considerations in the development of this integrated system and discuss the method by which we reached the ultimate solution. This paper, while just one example of the kind of problem solving that happens every day, offers insight into what happens when the theories of systems engineering are put into practice.
    Keywords: Man/System Technology and Life Support
    Type: JSC-CN-19113 , 40th International Conference on Environmental Systems; Jul 11, 2010 - Jul 15, 2010; Reston, Virginia; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Crew Exploration Vehicle Environmental Control and Life Support Development Status (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: The Orion Crew Exploration Vehicle (CEV) is the first crew transport vehicle to be developed by the National Aeronautics and Space Administration (NASA) in the last thirty years. The CEV is being developed to transport the crew safely from the Earth to the Moon and back again. This year, the vehicle continued to go through design refinements to reduce weight, meet requirements, and operate reliably. Preliminary Design Review was performed and long lead procurement items were started. The design of the Orion Environmental Control and Life Support (ECLS) system, which includes the life support and active thermal control systems, is progressing through the design stage into manufacturing. This paper covers the Orion ECLS development from April 2009 to April 2010.
    Keywords: Man/System Technology and Life Support
    Type: JSC-CN-19223
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    Crew Exploration Vehicle Environmental Control and Life Support Emergency Gas Consumable Sizing (2007)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: As part of preparing for the Crew Exploration Vehicle (CEV), the National Aeronautics and Space Administration (NASA) worked on developing the requirements that drive the emergency gas consumables. Emergency gas is required to support Extravehicular Activities (EVA), maintain the cabin pressure during a cabin leak for the crew to don their suits, and to recover the cabin following a toxic even or a fire.
    Keywords: Man/System Technology and Life Support
    Type: 07ICES-174 , International Conference on Environmental Sciences; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    Crew Exploration Vehicle Environmental Control and Life Support Fire Protection Approach (2007)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: As part of preparing for the Crew Exploration Vehicle (CEV), the National Aeronautics and Space Administration (NASA) worked on developing the requirements to manage the fire risk. The new CEV poses unique challenges to current fire protection systems. The size and configuration of the vehicle resembles the Apollo capsule instead of the current Space Shuttle or the International Space Station. The smaller free air volume and fully cold plated avionic bays of the CEV requires a different approach in fire protection than the ones currently utilized. The fire protection approach discussed in this paper incorporates historical lessons learned and fire detection and suppression system design philosophy spanning from Apollo to the International Space Station. Working with NASA fire and materials experts, this approach outlines the best requirements for both the closed out area of the vehicle, such as the avionics bay, and the crew cabin area to address the unique challenges due to the size and configuration of the CEV.
    Keywords: Man/System Technology and Life Support
    Type: 2007-07ICES-231 , 37th International COfnerence on Environmental Systems; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 6
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    Crew Exploration Vehicle Environmental Control and Life Support Design Reference Missions (2007)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: In preparation for the contract award of the Crew Exploration Vehicle (CEV), the National Aeronautics and Space Administration (NASA) produced two design reference missions for the vehicle. The design references used teams of engineers across the agency to come up with two configurations. This process helped NASA understand the conflicts and limitations in the CEV design, and investigate options to solve them.
    Keywords: Man/System Technology and Life Support
    Type: Rept-07ICES-173 , International Conference of Environmental Systems; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 7
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    Crew Exploration Vehicle Environmental Control and Life Support Development Status (2007)
    In:  Other Sources
    Details
    Publication Date: 2019-07-13
    Description: The Crew Exploration Vehicle (CEV) is the first crew transport vehicle to be developed by the National Aeronautics and Space Administration (NASA) in the last thirty years. The CEV is being developed to transport the crew safely from the Earth to the Moon and back again. This year, the prime contractor has been selected, requirements have been refined, and development areas are being pursued. The Environmental Control and Life Support (ECLS) system, which includes the life support and active thermal control systems, is moving one year closer to performing on orbit.
    Keywords: Man/System Technology and Life Support
    Type: SAE-2007-01-3044 , International Conference on Environmental Systems; Jul 09, 2007 - Jul 12, 2007; Chicago, IL; United States
    Format: text
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    NASA TECHNICAL REPORTS
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