Heat Pipe Heat Exchangers with Double Isolation Layers for Prevention of Interpath Leakage

Award Information
Agency: National Aeronautics and Space Administration
Branch: N/A
Contract: NNJ05JB74C
Agency Tracking Number: 041962
Amount: $69,584.00
Phase: Phase I
Program: SBIR
Awards Year: 2005
Solicitation Year: 2004
Solicitation Topic Code: B3.01
Solicitation Number: N/A
Small Business Information
1046 New Holland Avenue, Lancaster, PA, 17601-5688
DUNS: 126288336
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 David Sarraf
 Principal Investigator
 (717) 295-6059
Business Contact
 Jon Zuo
Title: Business Official
Phone: (717) 295-6058
Email: jon.zuo@1-ACT.com
Research Institution
Current manned spacecraft heat rejection systems use two heat exchangers and an intermediate fluid loop to provide isolation between the crew compartment air and the exterior fluid loop. Isolation is required because the fluids used are either toxic or can cause suffocation. The extra hardware doubles the mass of the system, consumes more power, and reduces reliability. Advanced Cooling Technologies, Inc., supported by Hamilton Sundstrand, proposes to use a heat pipe heat exchanger to provide two levels of isolation between the two fluid streams. This will allow the safe use of the otherwise toxic or harmful exterior fluids with no danger to the crew and will avoid the mass and power penalty of the existing approach. This approach is also potentially lower mass than an incremental improvement to the existing exchanger. The Phase I work will include conceptual design of a liquid/liquid and liquid/air replacement for the existing exchangers and a liquid/air exchanger that replaces both system exchangers. A system-level trade study will be conducted to assess the impact of the new exchanger designs on power and volume consumption and on thermal performance. Representative exchanger segments will be fabricated and tested to demonstrate readiness of the technology.

* Information listed above is at the time of submission. *

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