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Implications of Advanced Crew Escape Suit Transpiration for the Orion ProgramHuman testing was conducted to more fully characterize the integrated performance of the Advanced Crew Escape Suit (ACES) with liquid cooling provide by an Individual Cooling Unit (ICU) across a broad range of environmental conditions and metabolic rates. Together with a correlation for the ACES Liquid Cooling Garment as a function of inlet temperature, metabolic rate, and crew size, a reasonably conservative correlation for core temperature was achieved for the human thermal model applied to the ACES with ICU cooling. A key observation for this correlation was accounting for transpiration of evaporated sweat through the Gortex(Registered TradeMark) liner of the ACES indicated by as much as 0.6 lbm of sweat evaporated over the course of the 1 hour test profile, most of which could not be attributed to respiration or head sweat evaporation of the crew. Historically it has been assumed that transpiration was not an important design feature of the ACES suit. The correlated human thermal model will show transpiration to be highly useful in hot survival situations for the Orion Program when adequate liquid cooling is not available.
Document ID
20090001917
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Bue, Grant
(NASA Johnson Space Center Houston, TX, United States)
Kuznetz, Lawrence
(Universities Space Research Association Washington, DC, United States)
Date Acquired
August 24, 2013
Publication Date
January 1, 2009
Subject Category
Space Transportation And Safety
Meeting Information
Meeting: 39th International Conference on Environmental Systems
Location: Georgia
Country: United States
Start Date: July 12, 2009
End Date: July 16, 2009
Sponsors: Society of Automotive Engineers, Inc.
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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