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Recent Operational Experience with the Internal Thermal Control System Dual-Membrane Gas TrapA dual-membrane gas trap is currently used to remove gas bubbles from the Internal Thermal Control System (ITCS) coolant on board the International Space Station. The gas trap consists of concentric tube membrane pairs, comprised of outer hydrophilic tubes and inner hydrophobic fibers. Liquid coolant passes through the outer hydrophilic membrane, which traps the gas bubbles. The inner hydrophobic fiber allows the trapped gas bubbles to pass through and vent to the ambient atmosphere in the cabin. The gas removal performance and operational lifetime of the gas trap have been affected by contamination in the ITCS coolant. However, the gas trap has performed flawlessly with regard to its purpose of preventing gas bubbles from causing depriming, overspeed, and shutdown of the ITCS pump. This paper discusses on-orbit events over the course of the last year related to the performance and functioning of the gas trap.
Document ID
20040085974
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Leimkuehler, Thomas O.
(Honeywell, Inc. United States)
Lukens, Clark
(Honeywell, Inc. United States)
Reeves, Daniel R.
(Boeing Co. United States)
Holt, James M.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Spacecraft Design, Testing And Performance
Report/Patent Number
SAE-04ICES-201
Meeting Information
Meeting: 2004 International Conference on Environmental Systems 34th Annual Meeting
Location: Colorado Springs, CO
Country: United States
Start Date: July 19, 2004
End Date: July 22, 2004
Sponsors: Society of Automotive Engineers, Inc.
Distribution Limits
Public
Copyright
Other

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