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Investigation of DMSD Trend in the ISS Water Processor AssemblyThe ISS Water Recovery System (WRS) is responsible for providing potable water to the crew, to the Oxygen Generation System (OGS) for oxygen production via electrolysis, to the Waste & Hygiene Compartment (WHC) for flush water, and for experiments on ISS. The WRS includes the Water Processor Assembly (WPA) and the Urine Processor Assembly (UPA). The WPA processes condensate from the cabin air and distillate produced by the UPA. In 2010, an increasing trend in the Total Organic Carbon (TOC) in the potable water was ultimately identified as dimethylsilanediol (DMSD). The increasing trend was ultimately reversed after replacing the WPA's two multifiltration beds. However, the reason for the TOC trend and the subsequent recovery was not understood. A subsequent trend occurred in 2012. This paper summarizes the current understanding of the fate of DMSD in the WPA, how the increasing TOC trend occurred, and the plan for modifying the WPA to prevent recurrence.
Document ID
20140002686
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Carter, Layne (NASA Marshall Space Flight Center Huntsville, AL, United States)
Bowman, Elizabeth (Boeing Co. Huntsville, AL, United States)
Wilson, Mark (Boeing Co. Houston, TX, United States)
Gentry, Greg (Boeing Co. Houston, TX, United States)
Rector, Tony (Hamilton Sundstrand Space Systems International, Inc. Windsor Locks, CT, United States)
Date Acquired
April 3, 2014
Publication Date
July 14, 2013
Subject Category
Man/System Technology And Life Support
Chemistry And Materials (General)
Report/Patent Number
M13-2734
Meeting Information
Meeting: International Conference on Environmental Systems (ICES)
Location: Vail, CO
Country: United States
Start Date: July 14, 2013
End Date: July 19, 2013
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Public Use Permitted.

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