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Suited Contingency Ops Food - 2The contingency scenario for an emergency cabin depressurization event may require crewmembers to subsist in a pressurized suit for up to 144 hours. This scenario requires the capability for safe nutrition delivery through a helmet feed port against a 4 psi pressure differential to enable crewmembers to maintain strength and cognition to perform critical tasks. Two nutritional delivery prototypes were developed and analyzed for compatibility with the helmet feed port interface and for operational effectiveness against the pressure differential. The bag-in-bag (BiB) prototype, designed to equalize the suit pressure with the beverage pouch and enable a crewmember to drink normally, delivered water successfully to three different subjects in suits pressurized to 4 psi. The Boa restrainer pouch, designed to provide mechanical leverage to overcome the pressure differential, did not operate sufficiently. Guidelines were developed and compiled for contingency beverages that provide macro-nutritional requirements, a minimum one-year shelf life, and compatibility with the delivery hardware. Evaluation results and food product parameters have the potential to be used to improve future prototype designs and develop complete nutritional beverages for contingency events. These feeding capabilities would have additional use on extended surface mission EVAs, where the current in-suit drinking device may be insufficient.
Document ID
20140003136
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Glass, J. W.
(MEI Technologies, Inc. Houston, TX, United States)
Leong, M. L.
(Lockheed Martin Corp. Houston, TX, United States)
Douglas, G. L.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
April 17, 2014
Publication Date
February 12, 2014
Subject Category
Man/System Technology And Life Support
Space Transportation And Safety
Report/Patent Number
JSC-CN-29822
Meeting Information
Meeting: NASA Human Research Program Investigators'' Workshop 2014
Location: Galveston, TX
Country: United States
Start Date: February 12, 2014
End Date: February 13, 2014
Distribution Limits
Public
Copyright
Public Use Permitted.
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