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Utilization of Porous Media for Condensing Heat ExchangersThe use of porous media as a mean of separating liquid condensate from the air stream in condensing heat exchangers has been explored in the past inside small plant growth chambers and in the Apollo Command Module. Both applications used a cooled porous media made of sintered stainless steel to cool and separate condensation from the air stream. However, the main issues with the utilization of porous media in the past have been the deterioration of the porous media over long duration, such as clogging and changes in surface wetting characteristics. In addition, for long duration usage, biofilm growth from microorganisms on the porous medial would also be an issue. In developing Porous Media Condensing Heat Exchangers (PMCHX) for future space applications, different porous materials and microbial growth control methods will need to be explored. This paper explores the work performed at JSC and GRC to evaluate different porous materials and microbial control methods to support the development of a Porous Media Condensing Heat Exchanger. It outlines the basic principles for designing a PMCHX and issues that were encountered and ways to resolve those issues. The PMCHX has potential of mass, volume, and power savings over current CHX and water separator technology and would be beneficial for long duration space missions.
Document ID
20080026152
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Tuan, George C.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
February 5, 2006
Subject Category
Man/System Technology And Life Support
Meeting Information
Meeting: Habitation 2006
Location: Orlando, Fl
Country: United States
Start Date: February 5, 2006
End Date: February 8, 2006
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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